diff --git a/Documentation/00-INDEX b/Documentation/00-INDEX
index 7306081..4382778 100644
--- a/Documentation/00-INDEX
+++ b/Documentation/00-INDEX
@@ -159,8 +159,6 @@
 	- info on using the Hayes ESP serial driver.
 highuid.txt
 	- notes on the change from 16 bit to 32 bit user/group IDs.
-hpet.txt
-	- High Precision Event Timer Driver for Linux.
 timers/
 	- info on the timer related topics
 hw_random.txt
diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index 3d2d0c2..cc8093c 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -287,14 +287,6 @@
 
 ---------------------------
 
-What:	old style serial driver for ColdFire (CONFIG_SERIAL_COLDFIRE)
-When:	2.6.28
-Why:	This driver still uses the old interface and has been replaced
-	by CONFIG_SERIAL_MCF.
-Who:	Sebastian Siewior <sebastian@breakpoint.cc>
-
----------------------------
-
 What:	/sys/o2cb symlink
 When:	January 2010
 Why:	/sys/fs/o2cb is the proper location for this information - /sys/o2cb
diff --git a/Documentation/timers/00-INDEX b/Documentation/timers/00-INDEX
new file mode 100644
index 0000000..397dc35
--- /dev/null
+++ b/Documentation/timers/00-INDEX
@@ -0,0 +1,10 @@
+00-INDEX
+	- this file
+highres.txt
+	- High resolution timers and dynamic ticks design notes
+hpet.txt
+	- High Precision Event Timer Driver for Linux
+hrtimers.txt
+	- subsystem for high-resolution kernel timers
+timer_stats.txt
+	- timer usage statistics
diff --git a/Documentation/hpet.txt b/Documentation/timers/hpet.txt
similarity index 81%
rename from Documentation/hpet.txt
rename to Documentation/timers/hpet.txt
index 6ad52d9..e7c09ab 100644
--- a/Documentation/hpet.txt
+++ b/Documentation/timers/hpet.txt
@@ -1,21 +1,32 @@
 		High Precision Event Timer Driver for Linux
 
-The High Precision Event Timer (HPET) hardware is the future replacement
-for the 8254 and Real Time Clock (RTC) periodic timer functionality.
-Each HPET can have up to 32 timers.  It is possible to configure the
-first two timers as legacy replacements for 8254 and RTC periodic timers.
-A specification done by Intel and Microsoft can be found at
-<http://www.intel.com/technology/architecture/hpetspec.htm>.
+The High Precision Event Timer (HPET) hardware follows a specification
+by Intel and Microsoft which can be found at
+
+	http://www.intel.com/technology/architecture/hpetspec.htm
+
+Each HPET has one fixed-rate counter (at 10+ MHz, hence "High Precision")
+and up to 32 comparators.  Normally three or more comparators are provided,
+each of which can generate oneshot interupts and at least one of which has
+additional hardware to support periodic interrupts.  The comparators are
+also called "timers", which can be misleading since usually timers are
+independent of each other ... these share a counter, complicating resets.
+
+HPET devices can support two interrupt routing modes.  In one mode, the
+comparators are additional interrupt sources with no particular system
+role.  Many x86 BIOS writers don't route HPET interrupts at all, which
+prevents use of that mode.  They support the other "legacy replacement"
+mode where the first two comparators block interrupts from 8254 timers
+and from the RTC.
 
 The driver supports detection of HPET driver allocation and initialization
 of the HPET before the driver module_init routine is called.  This enables
 platform code which uses timer 0 or 1 as the main timer to intercept HPET
 initialization.  An example of this initialization can be found in
-arch/i386/kernel/time_hpet.c.
+arch/x86/kernel/hpet.c.
 
-The driver provides two APIs which are very similar to the API found in
-the rtc.c driver.  There is a user space API and a kernel space API.
-An example user space program is provided below.
+The driver provides a userspace API which resembles the API found in the
+RTC driver framework.  An example user space program is provided below.
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -286,15 +297,3 @@
 
 	return;
 }
-
-The kernel API has three interfaces exported from the driver:
-
-	hpet_register(struct hpet_task *tp, int periodic)
-	hpet_unregister(struct hpet_task *tp)
-	hpet_control(struct hpet_task *tp, unsigned int cmd, unsigned long arg)
-
-The kernel module using this interface fills in the ht_func and ht_data
-members of the hpet_task structure before calling hpet_register.
-hpet_control simply vectors to the hpet_ioctl routine and has the same
-commands and respective arguments as the user API.  hpet_unregister
-is used to terminate usage of the HPET timer reserved by hpet_register.
diff --git a/MAINTAINERS b/MAINTAINERS
index 6ba3ee8..74b8082 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2797,15 +2797,6 @@
 T:	git git://git.infradead.org/mtd-2.6.git
 S:	Maintained
 
-MEI MN10300/AM33 PORT
-P:	David Howells
-M:	dhowells@redhat.com
-P:	Koichi Yasutake
-M:	yasutake.koichi@jp.panasonic.com
-L:	linux-am33-list@redhat.com (moderated for non-subscribers)
-W:	ftp://ftp.redhat.com/pub/redhat/gnupro/AM33/
-S:	Maintained
-
 MICROTEK X6 SCANNER
 P:	Oliver Neukum
 M:	oliver@neukum.name
@@ -3170,6 +3161,15 @@
 L:	i2c@lm-sensors.org
 S:	Maintained
 
+PANASONIC MN10300/AM33 PORT
+P:	David Howells
+M:	dhowells@redhat.com
+P:	Koichi Yasutake
+M:	yasutake.koichi@jp.panasonic.com
+L:	linux-am33-list@redhat.com (moderated for non-subscribers)
+W:	ftp://ftp.redhat.com/pub/redhat/gnupro/AM33/
+S:	Maintained
+
 PARALLEL PORT SUPPORT
 L:	linux-parport@lists.infradead.org (subscribers-only)
 S:	Orphan
diff --git a/arch/Kconfig b/arch/Kconfig
index 364c6da..0267bab 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -13,6 +13,20 @@
 
 	  If unsure, say N.
 
+config OPROFILE_IBS
+	bool "OProfile AMD IBS support (EXPERIMENTAL)"
+	default n
+	depends on OPROFILE && SMP && X86
+	help
+          Instruction-Based Sampling (IBS) is a new profiling
+          technique that provides rich, precise program performance
+          information. IBS is introduced by AMD Family10h processors
+          (AMD Opteron Quad-Core processor “Barcelona”) to overcome
+          the limitations of conventional performance counter
+          sampling.
+
+	  If unsure, say N.
+
 config HAVE_OPROFILE
 	def_bool n
 
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 93229b3..339293d 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -117,15 +117,14 @@
 
 #ifdef CONFIG_BF54x
 	if (channel >= CH_UART2_RX && channel <= CH_UART3_TX) {
-		if (strncmp(device_id, "BFIN_UART", 9) == 0) {
-			dma_ch[channel].regs->peripheral_map &= 0x0FFF;
-			dma_ch[channel].regs->peripheral_map |=
+		unsigned int per_map;
+		per_map = dma_ch[channel].regs->peripheral_map & 0xFFF;
+		if (strncmp(device_id, "BFIN_UART", 9) == 0)
+			dma_ch[channel].regs->peripheral_map = per_map |
 				((channel - CH_UART2_RX + 0xC)<<12);
-		} else {
-			dma_ch[channel].regs->peripheral_map &= 0x0FFF;
-			dma_ch[channel].regs->peripheral_map |=
+		else
+			dma_ch[channel].regs->peripheral_map = per_map |
 				((channel - CH_UART2_RX + 0x6)<<12);
-		}
 	}
 #endif
 
diff --git a/arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h b/arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h
index 2526b6e..75722d6 100644
--- a/arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h
+++ b/arch/blackfin/mach-bf527/include/mach/bfin_serial_5xx.h
@@ -78,6 +78,9 @@
 #  define CONFIG_UART1_RTS_PIN -1
 # endif
 #endif
+
+#define BFIN_UART_TX_FIFO_SIZE	2
+
 /*
  * The pin configuration is different from schematic
  */
@@ -119,7 +122,6 @@
 	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
 }
 
-struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
 struct bfin_serial_res {
 	unsigned long uart_base_addr;
 	int uart_irq;
@@ -164,8 +166,6 @@
 #endif
 };
 
-int nr_ports = ARRAY_SIZE(bfin_serial_resource);
-
 #define DRIVER_NAME "bfin-uart"
 
 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
diff --git a/arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h b/arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h
index ebf592b..815bfe5 100644
--- a/arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h
+++ b/arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h
@@ -69,6 +69,8 @@
 # endif
 #endif
 
+#define BFIN_UART_TX_FIFO_SIZE	2
+
 struct bfin_serial_port {
         struct uart_port        port;
         unsigned int            old_status;
@@ -111,7 +113,6 @@
 	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
 }
 
-struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
 struct bfin_serial_res {
 	unsigned long	uart_base_addr;
 	int		uart_irq;
@@ -142,7 +143,6 @@
 
 #define DRIVER_NAME "bfin-uart"
 
-int nr_ports = BFIN_UART_NR_PORTS;
 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
 {
 
diff --git a/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h b/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
index 1bf56ff..b3f87e1 100644
--- a/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
+++ b/arch/blackfin/mach-bf537/include/mach/bfin_serial_5xx.h
@@ -78,6 +78,9 @@
 #  define CONFIG_UART1_RTS_PIN -1
 # endif
 #endif
+
+#define BFIN_UART_TX_FIFO_SIZE	2
+
 /*
  * The pin configuration is different from schematic
  */
@@ -119,7 +122,6 @@
 	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
 }
 
-struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
 struct bfin_serial_res {
 	unsigned long	uart_base_addr;
 	int		uart_irq;
@@ -164,8 +166,6 @@
 #endif
 };
 
-int nr_ports = ARRAY_SIZE(bfin_serial_resource);
-
 #define DRIVER_NAME "bfin-uart"
 
 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
diff --git a/arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h b/arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h
index 5e29446..e4cf35e 100644
--- a/arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h
+++ b/arch/blackfin/mach-bf548/include/mach/bfin_serial_5xx.h
@@ -82,6 +82,9 @@
 #  define CONFIG_UART1_RTS_PIN -1
 # endif
 #endif
+
+#define BFIN_UART_TX_FIFO_SIZE	2
+
 /*
  * The pin configuration is different from schematic
  */
@@ -105,7 +108,6 @@
 #endif
 };
 
-struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
 struct bfin_serial_res {
 	unsigned long	uart_base_addr;
 	int		uart_irq;
@@ -170,8 +172,6 @@
 #endif
 };
 
-int nr_ports = ARRAY_SIZE(bfin_serial_resource);
-
 #define DRIVER_NAME "bfin-uart"
 
 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
diff --git a/arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h b/arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h
index 8aa0278..e0ce0c1 100644
--- a/arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h
+++ b/arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h
@@ -69,6 +69,8 @@
 # endif
 #endif
 
+#define BFIN_UART_TX_FIFO_SIZE	2
+
 struct bfin_serial_port {
         struct uart_port        port;
         unsigned int            old_status;
@@ -111,7 +113,6 @@
 	bfin_write16(uart->port.membase + OFFSET_LSR, -1);
 }
 
-struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
 struct bfin_serial_res {
 	unsigned long	uart_base_addr;
 	int		uart_irq;
@@ -142,7 +143,6 @@
 
 #define DRIVER_NAME "bfin-uart"
 
-int nr_ports = BFIN_UART_NR_PORTS;
 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
 {
 
diff --git a/arch/sparc/include/asm/serial.h b/arch/sparc/include/asm/serial.h
new file mode 100644
index 0000000..f90d61c
--- /dev/null
+++ b/arch/sparc/include/asm/serial.h
@@ -0,0 +1,6 @@
+#ifndef __SPARC_SERIAL_H
+#define __SPARC_SERIAL_H
+
+#define BASE_BAUD ( 1843200 / 16 )
+
+#endif /* __SPARC_SERIAL_H */
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index d741f35..14a102e 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -275,6 +275,8 @@
 	case TIOCGLTC:
 	case TIOCSLTC:
 #endif
+	/* Note: these are out of date as we now have TCGETS2 etc but this
+	   whole lot should probably go away */
 	case TCGETS:
 	case TCSETSF:
 	case TCSETSW:
diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index c5f1013..0b7c4a3 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -38,8 +38,7 @@
 	  - "Crusoe" for the Transmeta Crusoe series.
 	  - "Efficeon" for the Transmeta Efficeon series.
 	  - "Winchip-C6" for original IDT Winchip.
-	  - "Winchip-2" for IDT Winchip 2.
-	  - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
+	  - "Winchip-2" for IDT Winchips with 3dNow! capabilities.
 	  - "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
 	  - "Geode GX/LX" For AMD Geode GX and LX processors.
 	  - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
@@ -194,19 +193,11 @@
 	  treat this chip as a 586TSC with some extended instructions
 	  and alignment requirements.
 
-config MWINCHIP2
-	bool "Winchip-2"
-	depends on X86_32
-	help
-	  Select this for an IDT Winchip-2.  Linux and GCC
-	  treat this chip as a 586TSC with some extended instructions
-	  and alignment requirements.
-
 config MWINCHIP3D
-	bool "Winchip-2A/Winchip-3"
+	bool "Winchip-2/Winchip-2A/Winchip-3"
 	depends on X86_32
 	help
-	  Select this for an IDT Winchip-2A or 3.  Linux and GCC
+	  Select this for an IDT Winchip-2, 2A or 3.  Linux and GCC
 	  treat this chip as a 586TSC with some extended instructions
 	  and alignment requirements.  Also enable out of order memory
 	  stores for this CPU, which can increase performance of some
@@ -318,7 +309,7 @@
 	int
 	default "7" if MPENTIUM4 || X86_GENERIC || GENERIC_CPU || MPSC
 	default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
-	default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
+	default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
 	default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7
 
 config X86_XADD
@@ -360,7 +351,7 @@
 
 config X86_ALIGNMENT_16
 	def_bool y
-	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
+	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
 
 config X86_INTEL_USERCOPY
 	def_bool y
@@ -368,7 +359,7 @@
 
 config X86_USE_PPRO_CHECKSUM
 	def_bool y
-	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
+	depends on MWINCHIP3D || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX || MCORE2
 
 config X86_USE_3DNOW
 	def_bool y
@@ -376,7 +367,7 @@
 
 config X86_OOSTORE
 	def_bool y
-	depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
+	depends on (MWINCHIP3D || MWINCHIPC6) && MTRR
 
 #
 # P6_NOPs are a relatively minor optimization that require a family >=
@@ -396,7 +387,7 @@
 
 config X86_TSC
 	def_bool y
-	depends on ((MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
+	depends on ((MWINCHIP3D || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ) || X86_64
 
 config X86_CMPXCHG64
 	def_bool y
@@ -406,7 +397,7 @@
 # generates cmov.
 config X86_CMOV
 	def_bool y
-	depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || X86_64)
+	depends on (MK8 || MK7 || MCORE2 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7 || MCRUSOE || MEFFICEON || X86_64)
 
 config X86_MINIMUM_CPU_FAMILY
 	int
@@ -417,7 +408,7 @@
 
 config X86_DEBUGCTLMSR
 	def_bool y
-	depends on !(MK6 || MWINCHIPC6 || MWINCHIP2 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
+	depends on !(MK6 || MWINCHIPC6 || MWINCHIP3D || MCYRIXIII || M586MMX || M586TSC || M586 || M486 || M386)
 
 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EMBEDDED
diff --git a/arch/x86/Makefile_32.cpu b/arch/x86/Makefile_32.cpu
index b72b4f7..80177ec 100644
--- a/arch/x86/Makefile_32.cpu
+++ b/arch/x86/Makefile_32.cpu
@@ -28,7 +28,6 @@
 cflags-$(CONFIG_MCRUSOE)	+= -march=i686 $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
 cflags-$(CONFIG_MEFFICEON)	+= -march=i686 $(call tune,pentium3) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
 cflags-$(CONFIG_MWINCHIPC6)	+= $(call cc-option,-march=winchip-c6,-march=i586)
-cflags-$(CONFIG_MWINCHIP2)	+= $(call cc-option,-march=winchip2,-march=i586)
 cflags-$(CONFIG_MWINCHIP3D)	+= $(call cc-option,-march=winchip2,-march=i586)
 cflags-$(CONFIG_MCYRIXIII)	+= $(call cc-option,-march=c3,-march=i486) $(align)-functions=0 $(align)-jumps=0 $(align)-loops=0
 cflags-$(CONFIG_MVIAC3_2)	+= $(call cc-option,-march=c3-2,-march=i686)
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index ca226ca..52d0359 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -213,7 +213,6 @@
 # CONFIG_MCRUSOE is not set
 # CONFIG_MEFFICEON is not set
 # CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
 # CONFIG_MWINCHIP3D is not set
 # CONFIG_MGEODEGX1 is not set
 # CONFIG_MGEODE_LX is not set
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index 2c4b1c7..f0a03d7 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -210,7 +210,6 @@
 # CONFIG_MCRUSOE is not set
 # CONFIG_MEFFICEON is not set
 # CONFIG_MWINCHIPC6 is not set
-# CONFIG_MWINCHIP2 is not set
 # CONFIG_MWINCHIP3D is not set
 # CONFIG_MGEODEGX1 is not set
 # CONFIG_MGEODE_LX is not set
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index ffc1bb4..eb43147 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -39,11 +39,11 @@
 	.endm 
 
 	/* clobbers %eax */	
-	.macro  CLEAR_RREGS
+	.macro  CLEAR_RREGS _r9=rax
 	xorl 	%eax,%eax
 	movq	%rax,R11(%rsp)
 	movq	%rax,R10(%rsp)
-	movq	%rax,R9(%rsp)
+	movq	%\_r9,R9(%rsp)
 	movq	%rax,R8(%rsp)
 	.endm
 
@@ -52,11 +52,10 @@
 	 * We don't reload %eax because syscall_trace_enter() returned
 	 * the value it wants us to use in the table lookup.
 	 */
-	.macro LOAD_ARGS32 offset
-	movl \offset(%rsp),%r11d
-	movl \offset+8(%rsp),%r10d
+	.macro LOAD_ARGS32 offset, _r9=0
+	.if \_r9
 	movl \offset+16(%rsp),%r9d
-	movl \offset+24(%rsp),%r8d
+	.endif
 	movl \offset+40(%rsp),%ecx
 	movl \offset+48(%rsp),%edx
 	movl \offset+56(%rsp),%esi
@@ -145,7 +144,7 @@
 	SAVE_ARGS 0,0,1
  	/* no need to do an access_ok check here because rbp has been
  	   32bit zero extended */ 
-1:	movl	(%rbp),%r9d
+1:	movl	(%rbp),%ebp
  	.section __ex_table,"a"
  	.quad 1b,ia32_badarg
  	.previous	
@@ -157,7 +156,7 @@
 	cmpl	$(IA32_NR_syscalls-1),%eax
 	ja	ia32_badsys
 sysenter_do_call:
-	IA32_ARG_FIXUP 1
+	IA32_ARG_FIXUP
 sysenter_dispatch:
 	call	*ia32_sys_call_table(,%rax,8)
 	movq	%rax,RAX-ARGOFFSET(%rsp)
@@ -234,20 +233,17 @@
 #endif
 
 sysenter_tracesys:
-	xchgl	%r9d,%ebp
 #ifdef CONFIG_AUDITSYSCALL
 	testl	$(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%r10)
 	jz	sysenter_auditsys
 #endif
 	SAVE_REST
 	CLEAR_RREGS
-	movq	%r9,R9(%rsp)
 	movq	$-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */
 	movq	%rsp,%rdi        /* &pt_regs -> arg1 */
 	call	syscall_trace_enter
 	LOAD_ARGS32 ARGOFFSET  /* reload args from stack in case ptrace changed it */
 	RESTORE_REST
-	xchgl	%ebp,%r9d
 	cmpl	$(IA32_NR_syscalls-1),%eax
 	ja	int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */
 	jmp	sysenter_do_call
@@ -314,9 +310,9 @@
 	testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%r10)
 	CFI_REMEMBER_STATE
 	jnz   cstar_tracesys
-cstar_do_call:	
 	cmpl $IA32_NR_syscalls-1,%eax
 	ja  ia32_badsys
+cstar_do_call:
 	IA32_ARG_FIXUP 1
 cstar_dispatch:
 	call *ia32_sys_call_table(,%rax,8)
@@ -357,15 +353,13 @@
 #endif
 	xchgl %r9d,%ebp
 	SAVE_REST
-	CLEAR_RREGS
-	movq %r9,R9(%rsp)
+	CLEAR_RREGS r9
 	movq $-ENOSYS,RAX(%rsp)	/* ptrace can change this for a bad syscall */
 	movq %rsp,%rdi        /* &pt_regs -> arg1 */
 	call syscall_trace_enter
-	LOAD_ARGS32 ARGOFFSET  /* reload args from stack in case ptrace changed it */
+	LOAD_ARGS32 ARGOFFSET, 1  /* reload args from stack in case ptrace changed it */
 	RESTORE_REST
 	xchgl %ebp,%r9d
-	movl RSP-ARGOFFSET(%rsp), %r8d
 	cmpl $(IA32_NR_syscalls-1),%eax
 	ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */
 	jmp cstar_do_call
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 5098585..0d41f03 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -23,7 +23,7 @@
 CFLAGS_tsc.o		:= $(nostackp)
 
 obj-y			:= process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
-obj-y			+= traps_$(BITS).o irq_$(BITS).o
+obj-y			+= traps.o irq_$(BITS).o dumpstack_$(BITS).o
 obj-y			+= time_$(BITS).o ioport.o ldt.o
 obj-y			+= setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
 obj-$(CONFIG_X86_VISWS)	+= visws_quirks.o
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index fb04e49..a84ac7b 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -444,7 +444,7 @@
 					    _text, _etext);
 
 		/* Only switch to UP mode if we don't immediately boot others */
-		if (num_possible_cpus() == 1 || setup_max_cpus <= 1)
+		if (num_present_cpus() == 1 || setup_max_cpus <= 1)
 			alternatives_smp_switch(0);
 	}
 #endif
diff --git a/arch/x86/kernel/apic_32.c b/arch/x86/kernel/apic_32.c
index a91c57c..21c831d 100644
--- a/arch/x86/kernel/apic_32.c
+++ b/arch/x86/kernel/apic_32.c
@@ -295,6 +295,9 @@
  *
  * Vector mappings are hard coded. On K8 only offset 0 (APIC500) and
  * MCE interrupts are supported. Thus MCE offset must be set to 0.
+ *
+ * If mask=1, the LVT entry does not generate interrupts while mask=0
+ * enables the vector. See also the BKDGs.
  */
 
 #define APIC_EILVT_LVTOFF_MCE 0
@@ -319,6 +322,7 @@
 	setup_APIC_eilvt(APIC_EILVT_LVTOFF_IBS, vector, msg_type, mask);
 	return APIC_EILVT_LVTOFF_IBS;
 }
+EXPORT_SYMBOL_GPL(setup_APIC_eilvt_ibs);
 
 /*
  * Program the next event, relative to now
diff --git a/arch/x86/kernel/apic_64.c b/arch/x86/kernel/apic_64.c
index 53898b6..94ddb69 100644
--- a/arch/x86/kernel/apic_64.c
+++ b/arch/x86/kernel/apic_64.c
@@ -307,6 +307,9 @@
  *
  * Vector mappings are hard coded. On K8 only offset 0 (APIC500) and
  * MCE interrupts are supported. Thus MCE offset must be set to 0.
+ *
+ * If mask=1, the LVT entry does not generate interrupts while mask=0
+ * enables the vector. See also the BKDGs.
  */
 
 #define APIC_EILVT_LVTOFF_MCE 0
@@ -331,6 +334,7 @@
 	setup_APIC_eilvt(APIC_EILVT_LVTOFF_IBS, vector, msg_type, mask);
 	return APIC_EILVT_LVTOFF_IBS;
 }
+EXPORT_SYMBOL_GPL(setup_APIC_eilvt_ibs);
 
 /*
  * Program the next event, relative to now
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index fb789dd..25581dc 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -124,18 +124,25 @@
 {
 	u32 f1, f2;
 
-	asm("pushfl\n\t"
-	    "pushfl\n\t"
-	    "popl %0\n\t"
-	    "movl %0,%1\n\t"
-	    "xorl %2,%0\n\t"
-	    "pushl %0\n\t"
-	    "popfl\n\t"
-	    "pushfl\n\t"
-	    "popl %0\n\t"
-	    "popfl\n\t"
-	    : "=&r" (f1), "=&r" (f2)
-	    : "ir" (flag));
+	/*
+	 * Cyrix and IDT cpus allow disabling of CPUID
+	 * so the code below may return different results
+	 * when it is executed before and after enabling
+	 * the CPUID. Add "volatile" to not allow gcc to
+	 * optimize the subsequent calls to this function.
+	 */
+	asm volatile ("pushfl\n\t"
+		      "pushfl\n\t"
+		      "popl %0\n\t"
+		      "movl %0,%1\n\t"
+		      "xorl %2,%0\n\t"
+		      "pushl %0\n\t"
+		      "popfl\n\t"
+		      "pushfl\n\t"
+		      "popl %0\n\t"
+		      "popfl\n\t"
+		      : "=&r" (f1), "=&r" (f2)
+		      : "ir" (flag));
 
 	return ((f1^f2) & flag) != 0;
 }
@@ -719,12 +726,24 @@
 #endif
 }
 
+#ifdef CONFIG_X86_64
+static void vgetcpu_set_mode(void)
+{
+	if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
+		vgetcpu_mode = VGETCPU_RDTSCP;
+	else
+		vgetcpu_mode = VGETCPU_LSL;
+}
+#endif
+
 void __init identify_boot_cpu(void)
 {
 	identify_cpu(&boot_cpu_data);
 #ifdef CONFIG_X86_32
 	sysenter_setup();
 	enable_sep_cpu();
+#else
+	vgetcpu_set_mode();
 #endif
 }
 
@@ -797,7 +816,7 @@
 	else if (c->cpuid_level >= 0)
 		vendor = c->x86_vendor_id;
 
-	if (vendor && strncmp(c->x86_model_id, vendor, strlen(vendor)))
+	if (vendor && !strstr(c->x86_model_id, vendor))
 		printk(KERN_CONT "%s ", vendor);
 
 	if (c->x86_model_id[0])
diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c
index 395acb1..b4f14c6 100644
--- a/arch/x86/kernel/doublefault_32.c
+++ b/arch/x86/kernel/doublefault_32.c
@@ -66,6 +66,6 @@
 		.ds		= __USER_DS,
 		.fs		= __KERNEL_PERCPU,
 
-		.__cr3		= __phys_addr_const((unsigned long)swapper_pg_dir)
+		.__cr3		= __pa_nodebug(swapper_pg_dir),
 	}
 };
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
new file mode 100644
index 0000000..201ee35
--- /dev/null
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -0,0 +1,447 @@
+/*
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+#define STACKSLOTS_PER_LINE 8
+#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+	printk(" [<%p>] %s%pS\n", (void *) address,
+			reliable ? "" : "? ", (void *) address);
+}
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+			void *p, unsigned int size, void *end)
+{
+	void *t = tinfo;
+	if (end) {
+		if (p < end && p >= (end-THREAD_SIZE))
+			return 1;
+		else
+			return 0;
+	}
+	return p > t && p < t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+	struct stack_frame *next_frame;
+	unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+		unsigned long *stack, unsigned long bp,
+		const struct stacktrace_ops *ops, void *data,
+		unsigned long *end)
+{
+	struct stack_frame *frame = (struct stack_frame *)bp;
+
+	while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
+		unsigned long addr;
+
+		addr = *stack;
+		if (__kernel_text_address(addr)) {
+			if ((unsigned long) stack == bp + sizeof(long)) {
+				ops->address(data, addr, 1);
+				frame = frame->next_frame;
+				bp = (unsigned long) frame;
+			} else {
+				ops->address(data, addr, bp == 0);
+			}
+		}
+		stack++;
+	}
+	return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp,
+		const struct stacktrace_ops *ops, void *data)
+{
+	if (!task)
+		task = current;
+
+	if (!stack) {
+		unsigned long dummy;
+		stack = &dummy;
+		if (task && task != current)
+			stack = (unsigned long *)task->thread.sp;
+	}
+
+#ifdef CONFIG_FRAME_POINTER
+	if (!bp) {
+		if (task == current) {
+			/* Grab bp right from our regs */
+			get_bp(bp);
+		} else {
+			/* bp is the last reg pushed by switch_to */
+			bp = *(unsigned long *) task->thread.sp;
+		}
+	}
+#endif
+
+	for (;;) {
+		struct thread_info *context;
+
+		context = (struct thread_info *)
+			((unsigned long)stack & (~(THREAD_SIZE - 1)));
+		bp = print_context_stack(context, stack, bp, ops, data, NULL);
+
+		stack = (unsigned long *)context->previous_esp;
+		if (!stack)
+			break;
+		if (ops->stack(data, "IRQ") < 0)
+			break;
+		touch_nmi_watchdog();
+	}
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+	printk(data);
+	print_symbol(msg, symbol);
+	printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+	printk("%s%s\n", (char *)data, msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+	printk("%s <%s> ", (char *)data, name);
+	return 0;
+}
+
+/*
+ * Print one address/symbol entries per line.
+ */
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+	touch_nmi_watchdog();
+	printk(data);
+	printk_address(addr, reliable);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+	.warning = print_trace_warning,
+	.warning_symbol = print_trace_warning_symbol,
+	.stack = print_trace_stack,
+	.address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+	printk("%sCall Trace:\n", log_lvl);
+	dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp)
+{
+	show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+	unsigned long *stack;
+	int i;
+
+	if (sp == NULL) {
+		if (task)
+			sp = (unsigned long *)task->thread.sp;
+		else
+			sp = (unsigned long *)&sp;
+	}
+
+	stack = sp;
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (kstack_end(stack))
+			break;
+		if (i && ((i % STACKSLOTS_PER_LINE) == 0))
+			printk("\n%s", log_lvl);
+		printk(" %08lx", *stack++);
+		touch_nmi_watchdog();
+	}
+	printk("\n");
+	show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+	unsigned long bp = 0;
+	unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+	if (!bp)
+		get_bp(bp);
+#endif
+
+	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+		current->pid, current->comm, print_tainted(),
+		init_utsname()->release,
+		(int)strcspn(init_utsname()->version, " "),
+		init_utsname()->version);
+	show_trace(NULL, NULL, &stack, bp);
+}
+
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+	int i;
+
+	print_modules();
+	__show_regs(regs, 0);
+
+	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)\n",
+		TASK_COMM_LEN, current->comm, task_pid_nr(current),
+		current_thread_info(), current, task_thread_info(current));
+	/*
+	 * When in-kernel, we also print out the stack and code at the
+	 * time of the fault..
+	 */
+	if (!user_mode_vm(regs)) {
+		unsigned int code_prologue = code_bytes * 43 / 64;
+		unsigned int code_len = code_bytes;
+		unsigned char c;
+		u8 *ip;
+
+		printk(KERN_EMERG "Stack:\n");
+		show_stack_log_lvl(NULL, regs, &regs->sp,
+				0, KERN_EMERG);
+
+		printk(KERN_EMERG "Code: ");
+
+		ip = (u8 *)regs->ip - code_prologue;
+		if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+			/* try starting at IP */
+			ip = (u8 *)regs->ip;
+			code_len = code_len - code_prologue + 1;
+		}
+		for (i = 0; i < code_len; i++, ip++) {
+			if (ip < (u8 *)PAGE_OFFSET ||
+					probe_kernel_address(ip, c)) {
+				printk(" Bad EIP value.");
+				break;
+			}
+			if (ip == (u8 *)regs->ip)
+				printk("<%02x> ", c);
+			else
+				printk("%02x ", c);
+		}
+	}
+	printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+	unsigned short ud2;
+
+	if (ip < PAGE_OFFSET)
+		return 0;
+	if (probe_kernel_address((unsigned short *)ip, ud2))
+		return 0;
+
+	return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+	unsigned long flags;
+
+	oops_enter();
+
+	if (die_owner != raw_smp_processor_id()) {
+		console_verbose();
+		raw_local_irq_save(flags);
+		__raw_spin_lock(&die_lock);
+		die_owner = smp_processor_id();
+		die_nest_count = 0;
+		bust_spinlocks(1);
+	} else {
+		raw_local_irq_save(flags);
+	}
+	die_nest_count++;
+	return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+	bust_spinlocks(0);
+	die_owner = -1;
+	add_taint(TAINT_DIE);
+	__raw_spin_unlock(&die_lock);
+	raw_local_irq_restore(flags);
+
+	if (!regs)
+		return;
+
+	if (kexec_should_crash(current))
+		crash_kexec(regs);
+	if (in_interrupt())
+		panic("Fatal exception in interrupt");
+	if (panic_on_oops)
+		panic("Fatal exception");
+	oops_exit();
+	do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+	unsigned short ss;
+	unsigned long sp;
+
+	printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+	printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+	printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	printk("DEBUG_PAGEALLOC");
+#endif
+	printk("\n");
+	if (notify_die(DIE_OOPS, str, regs, err,
+			current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+		return 1;
+
+	show_registers(regs);
+	/* Executive summary in case the oops scrolled away */
+	sp = (unsigned long) (&regs->sp);
+	savesegment(ss, ss);
+	if (user_mode(regs)) {
+		sp = regs->sp;
+		ss = regs->ss & 0xffff;
+	}
+	printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
+	print_symbol("%s", regs->ip);
+	printk(" SS:ESP %04x:%08lx\n", ss, sp);
+	return 0;
+}
+
+/*
+ * This is gone through when something in the kernel has done something bad
+ * and is about to be terminated:
+ */
+void die(const char *str, struct pt_regs *regs, long err)
+{
+	unsigned long flags = oops_begin();
+
+	if (die_nest_count < 3) {
+		report_bug(regs->ip, regs);
+
+		if (__die(str, regs, err))
+			regs = NULL;
+	} else {
+		printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
+	}
+
+	oops_end(flags, regs, SIGSEGV);
+}
+
+static DEFINE_SPINLOCK(nmi_print_lock);
+
+void notrace __kprobes
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+	if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+		return;
+
+	spin_lock(&nmi_print_lock);
+	/*
+	* We are in trouble anyway, lets at least try
+	* to get a message out:
+	*/
+	bust_spinlocks(1);
+	printk(KERN_EMERG "%s", str);
+	printk(" on CPU%d, ip %08lx, registers:\n",
+		smp_processor_id(), regs->ip);
+	show_registers(regs);
+	if (do_panic)
+		panic("Non maskable interrupt");
+	console_silent();
+	spin_unlock(&nmi_print_lock);
+	bust_spinlocks(0);
+
+	/*
+	 * If we are in kernel we are probably nested up pretty bad
+	 * and might aswell get out now while we still can:
+	 */
+	if (!user_mode_vm(regs)) {
+		current->thread.trap_no = 2;
+		crash_kexec(regs);
+	}
+
+	do_exit(SIGSEGV);
+}
+
+static int __init oops_setup(char *s)
+{
+	if (!s)
+		return -EINVAL;
+	if (!strcmp(s, "panic"))
+		panic_on_oops = 1;
+	return 0;
+}
+early_param("oops", oops_setup);
+
+static int __init kstack_setup(char *s)
+{
+	if (!s)
+		return -EINVAL;
+	kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+	return 0;
+}
+early_param("kstack", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+	code_bytes = simple_strtoul(s, NULL, 0);
+	if (code_bytes > 8192)
+		code_bytes = 8192;
+
+	return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
new file mode 100644
index 0000000..086cc81
--- /dev/null
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -0,0 +1,573 @@
+/*
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+#include <linux/kallsyms.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/hardirq.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/kexec.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+
+#include <asm/stacktrace.h>
+
+#define STACKSLOTS_PER_LINE 4
+#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
+
+int panic_on_unrecovered_nmi;
+int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
+static unsigned int code_bytes = 64;
+static int die_counter;
+
+void printk_address(unsigned long address, int reliable)
+{
+	printk(" [<%p>] %s%pS\n", (void *) address,
+			reliable ? "" : "? ", (void *) address);
+}
+
+static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
+					unsigned *usedp, char **idp)
+{
+	static char ids[][8] = {
+		[DEBUG_STACK - 1] = "#DB",
+		[NMI_STACK - 1] = "NMI",
+		[DOUBLEFAULT_STACK - 1] = "#DF",
+		[STACKFAULT_STACK - 1] = "#SS",
+		[MCE_STACK - 1] = "#MC",
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+		[N_EXCEPTION_STACKS ...
+			N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
+#endif
+	};
+	unsigned k;
+
+	/*
+	 * Iterate over all exception stacks, and figure out whether
+	 * 'stack' is in one of them:
+	 */
+	for (k = 0; k < N_EXCEPTION_STACKS; k++) {
+		unsigned long end = per_cpu(orig_ist, cpu).ist[k];
+		/*
+		 * Is 'stack' above this exception frame's end?
+		 * If yes then skip to the next frame.
+		 */
+		if (stack >= end)
+			continue;
+		/*
+		 * Is 'stack' above this exception frame's start address?
+		 * If yes then we found the right frame.
+		 */
+		if (stack >= end - EXCEPTION_STKSZ) {
+			/*
+			 * Make sure we only iterate through an exception
+			 * stack once. If it comes up for the second time
+			 * then there's something wrong going on - just
+			 * break out and return NULL:
+			 */
+			if (*usedp & (1U << k))
+				break;
+			*usedp |= 1U << k;
+			*idp = ids[k];
+			return (unsigned long *)end;
+		}
+		/*
+		 * If this is a debug stack, and if it has a larger size than
+		 * the usual exception stacks, then 'stack' might still
+		 * be within the lower portion of the debug stack:
+		 */
+#if DEBUG_STKSZ > EXCEPTION_STKSZ
+		if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
+			unsigned j = N_EXCEPTION_STACKS - 1;
+
+			/*
+			 * Black magic. A large debug stack is composed of
+			 * multiple exception stack entries, which we
+			 * iterate through now. Dont look:
+			 */
+			do {
+				++j;
+				end -= EXCEPTION_STKSZ;
+				ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
+			} while (stack < end - EXCEPTION_STKSZ);
+			if (*usedp & (1U << j))
+				break;
+			*usedp |= 1U << j;
+			*idp = ids[j];
+			return (unsigned long *)end;
+		}
+#endif
+	}
+	return NULL;
+}
+
+/*
+ * x86-64 can have up to three kernel stacks:
+ * process stack
+ * interrupt stack
+ * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
+ */
+
+static inline int valid_stack_ptr(struct thread_info *tinfo,
+			void *p, unsigned int size, void *end)
+{
+	void *t = tinfo;
+	if (end) {
+		if (p < end && p >= (end-THREAD_SIZE))
+			return 1;
+		else
+			return 0;
+	}
+	return p > t && p < t + THREAD_SIZE - size;
+}
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+	struct stack_frame *next_frame;
+	unsigned long return_address;
+};
+
+static inline unsigned long
+print_context_stack(struct thread_info *tinfo,
+		unsigned long *stack, unsigned long bp,
+		const struct stacktrace_ops *ops, void *data,
+		unsigned long *end)
+{
+	struct stack_frame *frame = (struct stack_frame *)bp;
+
+	while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
+		unsigned long addr;
+
+		addr = *stack;
+		if (__kernel_text_address(addr)) {
+			if ((unsigned long) stack == bp + sizeof(long)) {
+				ops->address(data, addr, 1);
+				frame = frame->next_frame;
+				bp = (unsigned long) frame;
+			} else {
+				ops->address(data, addr, bp == 0);
+			}
+		}
+		stack++;
+	}
+	return bp;
+}
+
+void dump_trace(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp,
+		const struct stacktrace_ops *ops, void *data)
+{
+	const unsigned cpu = get_cpu();
+	unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
+	unsigned used = 0;
+	struct thread_info *tinfo;
+
+	if (!task)
+		task = current;
+
+	if (!stack) {
+		unsigned long dummy;
+		stack = &dummy;
+		if (task && task != current)
+			stack = (unsigned long *)task->thread.sp;
+	}
+
+#ifdef CONFIG_FRAME_POINTER
+	if (!bp) {
+		if (task == current) {
+			/* Grab bp right from our regs */
+			get_bp(bp);
+		} else {
+			/* bp is the last reg pushed by switch_to */
+			bp = *(unsigned long *) task->thread.sp;
+		}
+	}
+#endif
+
+	/*
+	 * Print function call entries in all stacks, starting at the
+	 * current stack address. If the stacks consist of nested
+	 * exceptions
+	 */
+	tinfo = task_thread_info(task);
+	for (;;) {
+		char *id;
+		unsigned long *estack_end;
+		estack_end = in_exception_stack(cpu, (unsigned long)stack,
+						&used, &id);
+
+		if (estack_end) {
+			if (ops->stack(data, id) < 0)
+				break;
+
+			bp = print_context_stack(tinfo, stack, bp, ops,
+							data, estack_end);
+			ops->stack(data, "<EOE>");
+			/*
+			 * We link to the next stack via the
+			 * second-to-last pointer (index -2 to end) in the
+			 * exception stack:
+			 */
+			stack = (unsigned long *) estack_end[-2];
+			continue;
+		}
+		if (irqstack_end) {
+			unsigned long *irqstack;
+			irqstack = irqstack_end -
+				(IRQSTACKSIZE - 64) / sizeof(*irqstack);
+
+			if (stack >= irqstack && stack < irqstack_end) {
+				if (ops->stack(data, "IRQ") < 0)
+					break;
+				bp = print_context_stack(tinfo, stack, bp,
+						ops, data, irqstack_end);
+				/*
+				 * We link to the next stack (which would be
+				 * the process stack normally) the last
+				 * pointer (index -1 to end) in the IRQ stack:
+				 */
+				stack = (unsigned long *) (irqstack_end[-1]);
+				irqstack_end = NULL;
+				ops->stack(data, "EOI");
+				continue;
+			}
+		}
+		break;
+	}
+
+	/*
+	 * This handles the process stack:
+	 */
+	bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
+	put_cpu();
+}
+EXPORT_SYMBOL(dump_trace);
+
+static void
+print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
+{
+	printk(data);
+	print_symbol(msg, symbol);
+	printk("\n");
+}
+
+static void print_trace_warning(void *data, char *msg)
+{
+	printk("%s%s\n", (char *)data, msg);
+}
+
+static int print_trace_stack(void *data, char *name)
+{
+	printk("%s <%s> ", (char *)data, name);
+	return 0;
+}
+
+/*
+ * Print one address/symbol entries per line.
+ */
+static void print_trace_address(void *data, unsigned long addr, int reliable)
+{
+	touch_nmi_watchdog();
+	printk(data);
+	printk_address(addr, reliable);
+}
+
+static const struct stacktrace_ops print_trace_ops = {
+	.warning = print_trace_warning,
+	.warning_symbol = print_trace_warning_symbol,
+	.stack = print_trace_stack,
+	.address = print_trace_address,
+};
+
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp, char *log_lvl)
+{
+	printk("%sCall Trace:\n", log_lvl);
+	dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
+}
+
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp)
+{
+	show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
+static void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *sp, unsigned long bp, char *log_lvl)
+{
+	unsigned long *stack;
+	int i;
+	const int cpu = smp_processor_id();
+	unsigned long *irqstack_end =
+		(unsigned long *) (cpu_pda(cpu)->irqstackptr);
+	unsigned long *irqstack =
+		(unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
+
+	/*
+	 * debugging aid: "show_stack(NULL, NULL);" prints the
+	 * back trace for this cpu.
+	 */
+
+	if (sp == NULL) {
+		if (task)
+			sp = (unsigned long *)task->thread.sp;
+		else
+			sp = (unsigned long *)&sp;
+	}
+
+	stack = sp;
+	for (i = 0; i < kstack_depth_to_print; i++) {
+		if (stack >= irqstack && stack <= irqstack_end) {
+			if (stack == irqstack_end) {
+				stack = (unsigned long *) (irqstack_end[-1]);
+				printk(" <EOI> ");
+			}
+		} else {
+		if (((long) stack & (THREAD_SIZE-1)) == 0)
+			break;
+		}
+		if (i && ((i % STACKSLOTS_PER_LINE) == 0))
+			printk("\n%s", log_lvl);
+		printk(" %016lx", *stack++);
+		touch_nmi_watchdog();
+	}
+	printk("\n");
+	show_trace_log_lvl(task, regs, sp, bp, log_lvl);
+}
+
+void show_stack(struct task_struct *task, unsigned long *sp)
+{
+	show_stack_log_lvl(task, NULL, sp, 0, "");
+}
+
+/*
+ * The architecture-independent dump_stack generator
+ */
+void dump_stack(void)
+{
+	unsigned long bp = 0;
+	unsigned long stack;
+
+#ifdef CONFIG_FRAME_POINTER
+	if (!bp)
+		get_bp(bp);
+#endif
+
+	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
+		current->pid, current->comm, print_tainted(),
+		init_utsname()->release,
+		(int)strcspn(init_utsname()->version, " "),
+		init_utsname()->version);
+	show_trace(NULL, NULL, &stack, bp);
+}
+EXPORT_SYMBOL(dump_stack);
+
+void show_registers(struct pt_regs *regs)
+{
+	int i;
+	unsigned long sp;
+	const int cpu = smp_processor_id();
+	struct task_struct *cur = cpu_pda(cpu)->pcurrent;
+
+	sp = regs->sp;
+	printk("CPU %d ", cpu);
+	__show_regs(regs, 1);
+	printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
+		cur->comm, cur->pid, task_thread_info(cur), cur);
+
+	/*
+	 * When in-kernel, we also print out the stack and code at the
+	 * time of the fault..
+	 */
+	if (!user_mode(regs)) {
+		unsigned int code_prologue = code_bytes * 43 / 64;
+		unsigned int code_len = code_bytes;
+		unsigned char c;
+		u8 *ip;
+
+		printk(KERN_EMERG "Stack:\n");
+		show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
+				regs->bp, KERN_EMERG);
+
+		printk(KERN_EMERG "Code: ");
+
+		ip = (u8 *)regs->ip - code_prologue;
+		if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
+			/* try starting at IP */
+			ip = (u8 *)regs->ip;
+			code_len = code_len - code_prologue + 1;
+		}
+		for (i = 0; i < code_len; i++, ip++) {
+			if (ip < (u8 *)PAGE_OFFSET ||
+					probe_kernel_address(ip, c)) {
+				printk(" Bad RIP value.");
+				break;
+			}
+			if (ip == (u8 *)regs->ip)
+				printk("<%02x> ", c);
+			else
+				printk("%02x ", c);
+		}
+	}
+	printk("\n");
+}
+
+int is_valid_bugaddr(unsigned long ip)
+{
+	unsigned short ud2;
+
+	if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
+		return 0;
+
+	return ud2 == 0x0b0f;
+}
+
+static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
+static int die_owner = -1;
+static unsigned int die_nest_count;
+
+unsigned __kprobes long oops_begin(void)
+{
+	int cpu;
+	unsigned long flags;
+
+	oops_enter();
+
+	/* racy, but better than risking deadlock. */
+	raw_local_irq_save(flags);
+	cpu = smp_processor_id();
+	if (!__raw_spin_trylock(&die_lock)) {
+		if (cpu == die_owner)
+			/* nested oops. should stop eventually */;
+		else
+			__raw_spin_lock(&die_lock);
+	}
+	die_nest_count++;
+	die_owner = cpu;
+	console_verbose();
+	bust_spinlocks(1);
+	return flags;
+}
+
+void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
+{
+	die_owner = -1;
+	bust_spinlocks(0);
+	die_nest_count--;
+	if (!die_nest_count)
+		/* Nest count reaches zero, release the lock. */
+		__raw_spin_unlock(&die_lock);
+	raw_local_irq_restore(flags);
+	if (!regs) {
+		oops_exit();
+		return;
+	}
+	if (in_interrupt())
+		panic("Fatal exception in interrupt");
+	if (panic_on_oops)
+		panic("Fatal exception");
+	oops_exit();
+	do_exit(signr);
+}
+
+int __kprobes __die(const char *str, struct pt_regs *regs, long err)
+{
+	printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
+#ifdef CONFIG_PREEMPT
+	printk("PREEMPT ");
+#endif
+#ifdef CONFIG_SMP
+	printk("SMP ");
+#endif
+#ifdef CONFIG_DEBUG_PAGEALLOC
+	printk("DEBUG_PAGEALLOC");
+#endif
+	printk("\n");
+	if (notify_die(DIE_OOPS, str, regs, err,
+			current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
+		return 1;
+
+	show_registers(regs);
+	add_taint(TAINT_DIE);
+	/* Executive summary in case the oops scrolled away */
+	printk(KERN_ALERT "RIP ");
+	printk_address(regs->ip, 1);
+	printk(" RSP <%016lx>\n", regs->sp);
+	if (kexec_should_crash(current))
+		crash_kexec(regs);
+	return 0;
+}
+
+void die(const char *str, struct pt_regs *regs, long err)
+{
+	unsigned long flags = oops_begin();
+
+	if (!user_mode(regs))
+		report_bug(regs->ip, regs);
+
+	if (__die(str, regs, err))
+		regs = NULL;
+	oops_end(flags, regs, SIGSEGV);
+}
+
+notrace __kprobes void
+die_nmi(char *str, struct pt_regs *regs, int do_panic)
+{
+	unsigned long flags;
+
+	if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
+		return;
+
+	flags = oops_begin();
+	/*
+	 * We are in trouble anyway, lets at least try
+	 * to get a message out.
+	 */
+	printk(KERN_EMERG "%s", str);
+	printk(" on CPU%d, ip %08lx, registers:\n",
+		smp_processor_id(), regs->ip);
+	show_registers(regs);
+	if (kexec_should_crash(current))
+		crash_kexec(regs);
+	if (do_panic || panic_on_oops)
+		panic("Non maskable interrupt");
+	oops_end(flags, NULL, SIGBUS);
+	nmi_exit();
+	local_irq_enable();
+	do_exit(SIGBUS);
+}
+
+static int __init oops_setup(char *s)
+{
+	if (!s)
+		return -EINVAL;
+	if (!strcmp(s, "panic"))
+		panic_on_oops = 1;
+	return 0;
+}
+early_param("oops", oops_setup);
+
+static int __init kstack_setup(char *s)
+{
+	if (!s)
+		return -EINVAL;
+	kstack_depth_to_print = simple_strtoul(s, NULL, 0);
+	return 0;
+}
+early_param("kstack", kstack_setup);
+
+static int __init code_bytes_setup(char *s)
+{
+	code_bytes = simple_strtoul(s, NULL, 0);
+	if (code_bytes > 8192)
+		code_bytes = 8192;
+
+	return 1;
+}
+__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 109792b..b21fbfa 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -730,6 +730,7 @@
 	movl $(__USER_DS), %ecx
 	movl %ecx, %ds
 	movl %ecx, %es
+	TRACE_IRQS_OFF
 	movl %esp,%eax			# pt_regs pointer
 	call *%edi
 	jmp ret_from_exception
@@ -760,20 +761,9 @@
 	RING0_INT_FRAME
 	pushl $-1			# mark this as an int
 	CFI_ADJUST_CFA_OFFSET 4
-	SAVE_ALL
-	GET_CR0_INTO_EAX
-	testl $0x4, %eax		# EM (math emulation bit)
-	jne device_not_available_emulate
-	preempt_stop(CLBR_ANY)
-	call math_state_restore
-	jmp ret_from_exception
-device_not_available_emulate:
-	pushl $0			# temporary storage for ORIG_EIP
+	pushl $do_device_not_available
 	CFI_ADJUST_CFA_OFFSET 4
-	call math_emulate
-	addl $4, %esp
-	CFI_ADJUST_CFA_OFFSET -4
-	jmp ret_from_exception
+	jmp error_code
 	CFI_ENDPROC
 END(device_not_available)
 
@@ -814,6 +804,7 @@
 	pushl $-1			# mark this as an int
 	CFI_ADJUST_CFA_OFFSET 4
 	SAVE_ALL
+	TRACE_IRQS_OFF
 	xorl %edx,%edx			# error code 0
 	movl %esp,%eax			# pt_regs pointer
 	call do_debug
@@ -858,6 +849,7 @@
 	pushl %eax
 	CFI_ADJUST_CFA_OFFSET 4
 	SAVE_ALL
+	TRACE_IRQS_OFF
 	xorl %edx,%edx		# zero error code
 	movl %esp,%eax		# pt_regs pointer
 	call do_nmi
@@ -898,6 +890,7 @@
 	pushl %eax
 	CFI_ADJUST_CFA_OFFSET 4
 	SAVE_ALL
+	TRACE_IRQS_OFF
 	FIXUP_ESPFIX_STACK		# %eax == %esp
 	xorl %edx,%edx			# zero error code
 	call do_nmi
@@ -928,6 +921,7 @@
 	pushl $-1			# mark this as an int
 	CFI_ADJUST_CFA_OFFSET 4
 	SAVE_ALL
+	TRACE_IRQS_OFF
 	xorl %edx,%edx		# zero error code
 	movl %esp,%eax		# pt_regs pointer
 	call do_int3
@@ -1030,7 +1024,7 @@
 	RING0_INT_FRAME
 	pushl $0
 	CFI_ADJUST_CFA_OFFSET 4
-	pushl machine_check_vector
+	pushl $do_machine_check
 	CFI_ADJUST_CFA_OFFSET 4
 	jmp error_code
 	CFI_ENDPROC
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index cf3a0b2..1db6ce4 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -667,6 +667,13 @@
 	SAVE_ARGS
 	leaq -ARGOFFSET(%rsp),%rdi	# arg1 for handler
 	pushq %rbp
+	/*
+	 * Save rbp twice: One is for marking the stack frame, as usual, and the
+	 * other, to fill pt_regs properly. This is because bx comes right
+	 * before the last saved register in that structure, and not bp. If the
+	 * base pointer were in the place bx is today, this would not be needed.
+	 */
+	movq %rbp, -8(%rsp)
 	CFI_ADJUST_CFA_OFFSET	8
 	CFI_REL_OFFSET		rbp, 0
 	movq %rsp,%rbp
@@ -932,6 +939,9 @@
 	.if \ist
 	movq	%gs:pda_data_offset, %rbp
 	.endif
+	.if \irqtrace
+	TRACE_IRQS_OFF
+	.endif
 	movq %rsp,%rdi
 	movq ORIG_RAX(%rsp),%rsi
 	movq $-1,ORIG_RAX(%rsp)
@@ -1058,7 +1068,8 @@
 	je  error_kernelspace
 error_swapgs:	
 	SWAPGS
-error_sti:	
+error_sti:
+	TRACE_IRQS_OFF
 	movq %rdi,RDI(%rsp) 	
 	CFI_REL_OFFSET	rdi,RDI
 	movq %rsp,%rdi
@@ -1232,7 +1243,7 @@
 END(simd_coprocessor_error)
 
 ENTRY(device_not_available)
-	zeroentry math_state_restore
+	zeroentry do_device_not_available
 END(device_not_available)
 
 	/* runs on exception stack */
diff --git a/arch/x86/kernel/es7000_32.c b/arch/x86/kernel/es7000_32.c
index 849e5cd..f454c78 100644
--- a/arch/x86/kernel/es7000_32.c
+++ b/arch/x86/kernel/es7000_32.c
@@ -109,6 +109,7 @@
 };
 
 extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
 #endif
 
 struct mip_reg {
@@ -243,21 +244,38 @@
 }
 
 #ifdef CONFIG_ACPI
-int __init
-find_unisys_acpi_oem_table(unsigned long *oem_addr)
+static unsigned long oem_addrX;
+static unsigned long oem_size;
+int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
 {
 	struct acpi_table_header *header = NULL;
 	int i = 0;
-	while (ACPI_SUCCESS(acpi_get_table("OEM1", i++, &header))) {
+	acpi_size tbl_size;
+
+	while (ACPI_SUCCESS(acpi_get_table_with_size("OEM1", i++, &header, &tbl_size))) {
 		if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
 			struct oem_table *t = (struct oem_table *)header;
-			*oem_addr = (unsigned long)__acpi_map_table(t->OEMTableAddr,
-								    t->OEMTableSize);
+
+			oem_addrX = t->OEMTableAddr;
+			oem_size = t->OEMTableSize;
+			early_acpi_os_unmap_memory(header, tbl_size);
+
+			*oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
+								    oem_size);
 			return 0;
 		}
+		early_acpi_os_unmap_memory(header, tbl_size);
 	}
 	return -1;
 }
+
+void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
+{
+	if (!oem_addr)
+		return;
+
+	__acpi_unmap_table((char *)oem_addr, oem_size);
+}
 #endif
 
 static void
diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c
index ae2ffc8..33581d9 100644
--- a/arch/x86/kernel/genx2apic_uv_x.c
+++ b/arch/x86/kernel/genx2apic_uv_x.c
@@ -114,7 +114,7 @@
 	unsigned long val, apicid, lapicid;
 	int pnode;
 
-	apicid = per_cpu(x86_cpu_to_apicid, cpu); /* ZZZ - cache node-local ? */
+	apicid = per_cpu(x86_cpu_to_apicid, cpu);
 	lapicid = apicid & 0x3f;		/* ZZZ macro needed */
 	pnode = uv_apicid_to_pnode(apicid);
 	val =
@@ -202,12 +202,10 @@
 	return uv_read_apic_id() >> index_msb;
 }
 
-#ifdef ZZZ		/* Needs x2apic patch */
 static void uv_send_IPI_self(int vector)
 {
 	apic_write(APIC_SELF_IPI, vector);
 }
-#endif
 
 struct genapic apic_x2apic_uv_x = {
 	.name = "UV large system",
@@ -215,15 +213,15 @@
 	.int_delivery_mode = dest_Fixed,
 	.int_dest_mode = (APIC_DEST_PHYSICAL != 0),
 	.target_cpus = uv_target_cpus,
-	.vector_allocation_domain = uv_vector_allocation_domain,/* Fixme ZZZ */
+	.vector_allocation_domain = uv_vector_allocation_domain,
 	.apic_id_registered = uv_apic_id_registered,
 	.init_apic_ldr = uv_init_apic_ldr,
 	.send_IPI_all = uv_send_IPI_all,
 	.send_IPI_allbutself = uv_send_IPI_allbutself,
 	.send_IPI_mask = uv_send_IPI_mask,
-	/* ZZZ.send_IPI_self = uv_send_IPI_self, */
+	.send_IPI_self = uv_send_IPI_self,
 	.cpu_mask_to_apicid = uv_cpu_mask_to_apicid,
-	.phys_pkg_id = phys_pkg_id,	/* Fixme ZZZ */
+	.phys_pkg_id = phys_pkg_id,
 	.get_apic_id = get_apic_id,
 	.set_apic_id = set_apic_id,
 	.apic_id_mask = (0xFFFFFFFFu),
@@ -286,12 +284,13 @@
 
 enum map_type {map_wb, map_uc};
 
-static __init void map_high(char *id, unsigned long base, int shift, enum map_type map_type)
+static __init void map_high(char *id, unsigned long base, int shift,
+			    int max_pnode, enum map_type map_type)
 {
 	unsigned long bytes, paddr;
 
 	paddr = base << shift;
-	bytes = (1UL << shift);
+	bytes = (1UL << shift) * (max_pnode + 1);
 	printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
 	       					paddr + bytes);
 	if (map_type == map_uc)
@@ -307,7 +306,7 @@
 
 	gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
 	if (gru.s.enable)
-		map_high("GRU", gru.s.base, shift, map_wb);
+		map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
 }
 
 static __init void map_config_high(int max_pnode)
@@ -317,7 +316,7 @@
 
 	cfg.v = uv_read_local_mmr(UVH_RH_GAM_CFG_OVERLAY_CONFIG_MMR);
 	if (cfg.s.enable)
-		map_high("CONFIG", cfg.s.base, shift, map_uc);
+		map_high("CONFIG", cfg.s.base, shift, max_pnode, map_uc);
 }
 
 static __init void map_mmr_high(int max_pnode)
@@ -327,7 +326,7 @@
 
 	mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
 	if (mmr.s.enable)
-		map_high("MMR", mmr.s.base, shift, map_uc);
+		map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
 }
 
 static __init void map_mmioh_high(int max_pnode)
@@ -337,7 +336,7 @@
 
 	mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
 	if (mmioh.s.enable)
-		map_high("MMIOH", mmioh.s.base, shift, map_uc);
+		map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
 }
 
 static __init void uv_rtc_init(void)
diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c
index 3e66bd3..1dcb0f1 100644
--- a/arch/x86/kernel/head.c
+++ b/arch/x86/kernel/head.c
@@ -35,6 +35,7 @@
 
 	/* start of EBDA area */
 	ebda_addr = get_bios_ebda();
+	printk(KERN_INFO "BIOS EBDA/lowmem at: %08x/%08x\n", ebda_addr, lowmem);
 
 	/* Fixup: bios puts an EBDA in the top 64K segment */
 	/* of conventional memory, but does not adjust lowmem. */
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 73deaff..acf62fc 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -115,13 +115,17 @@
 	hd.hd_phys_address = hpet_address;
 	hd.hd_address = hpet;
 	hd.hd_nirqs = nrtimers;
-	hd.hd_flags = HPET_DATA_PLATFORM;
 	hpet_reserve_timer(&hd, 0);
 
 #ifdef CONFIG_HPET_EMULATE_RTC
 	hpet_reserve_timer(&hd, 1);
 #endif
 
+	/*
+	 * NOTE that hd_irq[] reflects IOAPIC input pins (LEGACY_8254
+	 * is wrong for i8259!) not the output IRQ.  Many BIOS writers
+	 * don't bother configuring *any* comparator interrupts.
+	 */
 	hd.hd_irq[0] = HPET_LEGACY_8254;
 	hd.hd_irq[1] = HPET_LEGACY_RTC;
 
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 1f26fd9..5b5be9d 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -135,7 +135,7 @@
 	[IRQ15_VECTOR + 1 ... NR_VECTORS - 1] = -1
 };
 
-static void __init init_ISA_irqs (void)
+void __init init_ISA_irqs(void)
 {
 	int i;
 
@@ -164,22 +164,8 @@
 
 void init_IRQ(void) __attribute__((weak, alias("native_init_IRQ")));
 
-void __init native_init_IRQ(void)
+static void __init smp_intr_init(void)
 {
-	int i;
-
-	init_ISA_irqs();
-	/*
-	 * Cover the whole vector space, no vector can escape
-	 * us. (some of these will be overridden and become
-	 * 'special' SMP interrupts)
-	 */
-	for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
-		int vector = FIRST_EXTERNAL_VECTOR + i;
-		if (vector != IA32_SYSCALL_VECTOR)
-			set_intr_gate(vector, interrupt[i]);
-	}
-
 #ifdef CONFIG_SMP
 	/*
 	 * The reschedule interrupt is a CPU-to-CPU reschedule-helper
@@ -207,6 +193,12 @@
 	/* Low priority IPI to cleanup after moving an irq */
 	set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt);
 #endif
+}
+
+static void __init apic_intr_init(void)
+{
+	smp_intr_init();
+
 	alloc_intr_gate(THERMAL_APIC_VECTOR, thermal_interrupt);
 	alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt);
 
@@ -216,6 +208,25 @@
 	/* IPI vectors for APIC spurious and error interrupts */
 	alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);
 	alloc_intr_gate(ERROR_APIC_VECTOR, error_interrupt);
+}
+
+void __init native_init_IRQ(void)
+{
+	int i;
+
+	init_ISA_irqs();
+	/*
+	 * Cover the whole vector space, no vector can escape
+	 * us. (some of these will be overridden and become
+	 * 'special' SMP interrupts)
+	 */
+	for (i = 0; i < (NR_VECTORS - FIRST_EXTERNAL_VECTOR); i++) {
+		int vector = FIRST_EXTERNAL_VECTOR + i;
+		if (vector != IA32_SYSCALL_VECTOR)
+			set_intr_gate(vector, interrupt[i]);
+	}
+
+	apic_intr_init();
 
 	if (!acpi_ioapic)
 		setup_irq(2, &irq2);
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 922c140..0a1302f 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -123,7 +123,7 @@
 	}
 }
 
-void __show_registers(struct pt_regs *regs, int all)
+void __show_regs(struct pt_regs *regs, int all)
 {
 	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L;
 	unsigned long d0, d1, d2, d3, d6, d7;
@@ -189,7 +189,7 @@
 
 void show_regs(struct pt_regs *regs)
 {
-	__show_registers(regs, 1);
+	__show_regs(regs, 1);
 	show_trace(NULL, regs, &regs->sp, regs->bp);
 }
 
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ca80394..cd8c0ed 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -136,7 +136,7 @@
 }
 
 /* Prints also some state that isn't saved in the pt_regs */
-void __show_regs(struct pt_regs *regs)
+void __show_regs(struct pt_regs *regs, int all)
 {
 	unsigned long cr0 = 0L, cr2 = 0L, cr3 = 0L, cr4 = 0L, fs, gs, shadowgs;
 	unsigned long d0, d1, d2, d3, d6, d7;
@@ -175,6 +175,9 @@
 	rdmsrl(MSR_GS_BASE, gs);
 	rdmsrl(MSR_KERNEL_GS_BASE, shadowgs);
 
+	if (!all)
+		return;
+
 	cr0 = read_cr0();
 	cr2 = read_cr2();
 	cr3 = read_cr3();
@@ -200,7 +203,7 @@
 void show_regs(struct pt_regs *regs)
 {
 	printk(KERN_INFO "CPU %d:", smp_processor_id());
-	__show_regs(regs);
+	__show_regs(regs, 1);
 	show_trace(NULL, regs, (void *)(regs + 1), regs->bp);
 }
 
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index d138588..f6a11b9 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -354,9 +354,27 @@
 	printk(KERN_DEBUG "Force enabled HPET at resume\n");
 }
 
+static u32 ati_ixp4x0_rev(struct pci_dev *dev)
+{
+	u32 d;
+	u8  b;
+
+	pci_read_config_byte(dev, 0xac, &b);
+	b &= ~(1<<5);
+	pci_write_config_byte(dev, 0xac, b);
+	pci_read_config_dword(dev, 0x70, &d);
+	d |= 1<<8;
+	pci_write_config_dword(dev, 0x70, d);
+	pci_read_config_dword(dev, 0x8, &d);
+	d &= 0xff;
+	dev_printk(KERN_DEBUG, &dev->dev, "SB4X0 revision 0x%x\n", d);
+	return d;
+}
+
 static void ati_force_enable_hpet(struct pci_dev *dev)
 {
-	u32 uninitialized_var(val);
+	u32 d, val;
+	u8  b;
 
 	if (hpet_address || force_hpet_address)
 		return;
@@ -366,14 +384,33 @@
 		return;
 	}
 
+	d = ati_ixp4x0_rev(dev);
+	if (d  < 0x82)
+		return;
+
+	/* base address */
 	pci_write_config_dword(dev, 0x14, 0xfed00000);
 	pci_read_config_dword(dev, 0x14, &val);
+
+	/* enable interrupt */
+	outb(0x72, 0xcd6); b = inb(0xcd7);
+	b |= 0x1;
+	outb(0x72, 0xcd6); outb(b, 0xcd7);
+	outb(0x72, 0xcd6); b = inb(0xcd7);
+	if (!(b & 0x1))
+		return;
+	pci_read_config_dword(dev, 0x64, &d);
+	d |= (1<<10);
+	pci_write_config_dword(dev, 0x64, d);
+	pci_read_config_dword(dev, 0x64, &d);
+	if (!(d & (1<<10)))
+		return;
+
 	force_hpet_address = val;
 	force_hpet_resume_type = ATI_FORCE_HPET_RESUME;
 	dev_printk(KERN_DEBUG, &dev->dev, "Force enabled HPET at 0x%lx\n",
 		   force_hpet_address);
 	cached_dev = dev;
-	return;
 }
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS,
 			 ati_force_enable_hpet);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 21b8e0a..2255782 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -302,7 +302,7 @@
 		if (clen > MAX_MAP_CHUNK-slop)
 			clen = MAX_MAP_CHUNK-slop;
 		mapaddr = ramdisk_image & PAGE_MASK;
-		p = early_ioremap(mapaddr, clen+slop);
+		p = early_memremap(mapaddr, clen+slop);
 		memcpy(q, p+slop, clen);
 		early_iounmap(p, clen+slop);
 		q += clen;
@@ -379,7 +379,7 @@
 		return;
 	pa_data = boot_params.hdr.setup_data;
 	while (pa_data) {
-		data = early_ioremap(pa_data, PAGE_SIZE);
+		data = early_memremap(pa_data, PAGE_SIZE);
 		switch (data->type) {
 		case SETUP_E820_EXT:
 			parse_e820_ext(data, pa_data);
@@ -402,7 +402,7 @@
 		return;
 	pa_data = boot_params.hdr.setup_data;
 	while (pa_data) {
-		data = early_ioremap(pa_data, sizeof(*data));
+		data = early_memremap(pa_data, sizeof(*data));
 		e820_update_range(pa_data, sizeof(*data)+data->len,
 			 E820_RAM, E820_RESERVED_KERN);
 		found = 1;
@@ -428,7 +428,7 @@
 		return;
 	pa_data = boot_params.hdr.setup_data;
 	while (pa_data) {
-		data = early_ioremap(pa_data, sizeof(*data));
+		data = early_memremap(pa_data, sizeof(*data));
 		sprintf(buf, "setup data %x", data->type);
 		reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
 		pa_data = data->next;
@@ -998,6 +998,8 @@
 	 */
 	acpi_boot_table_init();
 
+	early_acpi_boot_init();
+
 #ifdef CONFIG_ACPI_NUMA
 	/*
 	 * Parse SRAT to discover nodes.
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 76b6f50..8c3aca7 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -334,14 +334,17 @@
 	 * does not change while we are assigning vectors to cpus.  Holding
 	 * this lock ensures we don't half assign or remove an irq from a cpu.
 	 */
-	ipi_call_lock_irq();
+	ipi_call_lock();
 	lock_vector_lock();
 	__setup_vector_irq(smp_processor_id());
 	cpu_set(smp_processor_id(), cpu_online_map);
 	unlock_vector_lock();
-	ipi_call_unlock_irq();
+	ipi_call_unlock();
 	per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
 
+	/* enable local interrupts */
+	local_irq_enable();
+
 	setup_secondary_clock();
 
 	wmb();
@@ -596,10 +599,12 @@
 	 * Give the other CPU some time to accept the IPI.
 	 */
 	udelay(200);
-	maxlvt = lapic_get_maxlvt();
-	if (maxlvt > 3)			/* Due to the Pentium erratum 3AP.  */
-		apic_write(APIC_ESR, 0);
-	accept_status = (apic_read(APIC_ESR) & 0xEF);
+	if (APIC_INTEGRATED(apic_version[phys_apicid])) {
+		maxlvt = lapic_get_maxlvt();
+		if (maxlvt > 3)			/* Due to the Pentium erratum 3AP.  */
+			apic_write(APIC_ESR, 0);
+		accept_status = (apic_read(APIC_ESR) & 0xEF);
+	}
 	pr_debug("NMI sent.\n");
 
 	if (send_status)
@@ -1256,6 +1261,44 @@
 	check_nmi_watchdog();
 }
 
+/*
+ * cpu_possible_map should be static, it cannot change as cpu's
+ * are onlined, or offlined. The reason is per-cpu data-structures
+ * are allocated by some modules at init time, and dont expect to
+ * do this dynamically on cpu arrival/departure.
+ * cpu_present_map on the other hand can change dynamically.
+ * In case when cpu_hotplug is not compiled, then we resort to current
+ * behaviour, which is cpu_possible == cpu_present.
+ * - Ashok Raj
+ *
+ * Three ways to find out the number of additional hotplug CPUs:
+ * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
+ * - The user can overwrite it with additional_cpus=NUM
+ * - Otherwise don't reserve additional CPUs.
+ * We do this because additional CPUs waste a lot of memory.
+ * -AK
+ */
+__init void prefill_possible_map(void)
+{
+	int i, possible;
+
+	/* no processor from mptable or madt */
+	if (!num_processors)
+		num_processors = 1;
+
+	possible = num_processors + disabled_cpus;
+	if (possible > NR_CPUS)
+		possible = NR_CPUS;
+
+	printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
+		possible, max_t(int, possible - num_processors, 0));
+
+	for (i = 0; i < possible; i++)
+		cpu_set(i, cpu_possible_map);
+
+	nr_cpu_ids = possible;
+}
+
 #ifdef CONFIG_HOTPLUG_CPU
 
 static void remove_siblinginfo(int cpu)
@@ -1281,60 +1324,6 @@
 	cpu_clear(cpu, cpu_sibling_setup_map);
 }
 
-static int additional_cpus __initdata = -1;
-
-static __init int setup_additional_cpus(char *s)
-{
-	return s && get_option(&s, &additional_cpus) ? 0 : -EINVAL;
-}
-early_param("additional_cpus", setup_additional_cpus);
-
-/*
- * cpu_possible_map should be static, it cannot change as cpu's
- * are onlined, or offlined. The reason is per-cpu data-structures
- * are allocated by some modules at init time, and dont expect to
- * do this dynamically on cpu arrival/departure.
- * cpu_present_map on the other hand can change dynamically.
- * In case when cpu_hotplug is not compiled, then we resort to current
- * behaviour, which is cpu_possible == cpu_present.
- * - Ashok Raj
- *
- * Three ways to find out the number of additional hotplug CPUs:
- * - If the BIOS specified disabled CPUs in ACPI/mptables use that.
- * - The user can overwrite it with additional_cpus=NUM
- * - Otherwise don't reserve additional CPUs.
- * We do this because additional CPUs waste a lot of memory.
- * -AK
- */
-__init void prefill_possible_map(void)
-{
-	int i;
-	int possible;
-
-	/* no processor from mptable or madt */
-	if (!num_processors)
-		num_processors = 1;
-
-	if (additional_cpus == -1) {
-		if (disabled_cpus > 0)
-			additional_cpus = disabled_cpus;
-		else
-			additional_cpus = 0;
-	}
-
-	possible = num_processors + additional_cpus;
-	if (possible > NR_CPUS)
-		possible = NR_CPUS;
-
-	printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
-		possible, max_t(int, possible - num_processors, 0));
-
-	for (i = 0; i < possible; i++)
-		cpu_set(i, cpu_possible_map);
-
-	nr_cpu_ids = possible;
-}
-
 static void __ref remove_cpu_from_maps(int cpu)
 {
 	cpu_clear(cpu, cpu_online_map);
diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c
index bbecf8b..77b400f 100644
--- a/arch/x86/kernel/time_32.c
+++ b/arch/x86/kernel/time_32.c
@@ -47,10 +47,9 @@
 	unsigned long pc = instruction_pointer(regs);
 
 #ifdef CONFIG_SMP
-	if (!v8086_mode(regs) && SEGMENT_IS_KERNEL_CODE(regs->cs) &&
-	    in_lock_functions(pc)) {
+	if (!user_mode_vm(regs) && in_lock_functions(pc)) {
 #ifdef CONFIG_FRAME_POINTER
-		return *(unsigned long *)(regs->bp + 4);
+		return *(unsigned long *)(regs->bp + sizeof(long));
 #else
 		unsigned long *sp = (unsigned long *)&regs->sp;
 
@@ -95,6 +94,7 @@
 
 	do_timer_interrupt_hook();
 
+#ifdef CONFIG_MCA
 	if (MCA_bus) {
 		/* The PS/2 uses level-triggered interrupts.  You can't
 		turn them off, nor would you want to (any attempt to
@@ -108,6 +108,7 @@
 		u8 irq_v = inb_p( 0x61 );	/* read the current state */
 		outb_p( irq_v|0x80, 0x61 );	/* reset the IRQ */
 	}
+#endif
 
 	return IRQ_HANDLED;
 }
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index e3d49c5..cb19d65 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/time.h>
+#include <linux/mca.h>
 
 #include <asm/i8253.h>
 #include <asm/hpet.h>
@@ -33,23 +34,34 @@
 	/* Assume the lock function has either no stack frame or a copy
 	   of flags from PUSHF
 	   Eflags always has bits 22 and up cleared unlike kernel addresses. */
-	if (!user_mode(regs) && in_lock_functions(pc)) {
+	if (!user_mode_vm(regs) && in_lock_functions(pc)) {
+#ifdef CONFIG_FRAME_POINTER
+		return *(unsigned long *)(regs->bp + sizeof(long));
+#else
 		unsigned long *sp = (unsigned long *)regs->sp;
 		if (sp[0] >> 22)
 			return sp[0];
 		if (sp[1] >> 22)
 			return sp[1];
+#endif
 	}
 	return pc;
 }
 EXPORT_SYMBOL(profile_pc);
 
-static irqreturn_t timer_event_interrupt(int irq, void *dev_id)
+irqreturn_t timer_interrupt(int irq, void *dev_id)
 {
 	add_pda(irq0_irqs, 1);
 
 	global_clock_event->event_handler(global_clock_event);
 
+#ifdef CONFIG_MCA
+	if (MCA_bus) {
+		u8 irq_v = inb_p(0x61);       /* read the current state */
+		outb_p(irq_v|0x80, 0x61);     /* reset the IRQ */
+	}
+#endif
+
 	return IRQ_HANDLED;
 }
 
@@ -100,7 +112,7 @@
 }
 
 static struct irqaction irq0 = {
-	.handler	= timer_event_interrupt,
+	.handler	= timer_interrupt,
 	.flags		= IRQF_DISABLED | IRQF_IRQPOLL | IRQF_NOBALANCING,
 	.mask		= CPU_MASK_NONE,
 	.name		= "timer"
@@ -111,16 +123,13 @@
 	if (!hpet_enable())
 		setup_pit_timer();
 
+	irq0.mask = cpumask_of_cpu(0);
 	setup_irq(0, &irq0);
 }
 
 void __init time_init(void)
 {
 	tsc_init();
-	if (cpu_has(&boot_cpu_data, X86_FEATURE_RDTSCP))
-		vgetcpu_mode = VGETCPU_RDTSCP;
-	else
-		vgetcpu_mode = VGETCPU_LSL;
 
 	late_time_init = choose_time_init();
 }
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
new file mode 100644
index 0000000..e062974
--- /dev/null
+++ b/arch/x86/kernel/traps.c
@@ -0,0 +1,1034 @@
+/*
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ *
+ *  Pentium III FXSR, SSE support
+ *	Gareth Hughes <gareth@valinux.com>, May 2000
+ */
+
+/*
+ * Handle hardware traps and faults.
+ */
+#include <linux/interrupt.h>
+#include <linux/kallsyms.h>
+#include <linux/spinlock.h>
+#include <linux/kprobes.h>
+#include <linux/uaccess.h>
+#include <linux/utsname.h>
+#include <linux/kdebug.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/ptrace.h>
+#include <linux/string.h>
+#include <linux/unwind.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/kexec.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/bug.h>
+#include <linux/nmi.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#ifdef CONFIG_EISA
+#include <linux/ioport.h>
+#include <linux/eisa.h>
+#endif
+
+#ifdef CONFIG_MCA
+#include <linux/mca.h>
+#endif
+
+#if defined(CONFIG_EDAC)
+#include <linux/edac.h>
+#endif
+
+#include <asm/stacktrace.h>
+#include <asm/processor.h>
+#include <asm/debugreg.h>
+#include <asm/atomic.h>
+#include <asm/system.h>
+#include <asm/unwind.h>
+#include <asm/traps.h>
+#include <asm/desc.h>
+#include <asm/i387.h>
+
+#include <mach_traps.h>
+
+#ifdef CONFIG_X86_64
+#include <asm/pgalloc.h>
+#include <asm/proto.h>
+#include <asm/pda.h>
+#else
+#include <asm/processor-flags.h>
+#include <asm/arch_hooks.h>
+#include <asm/nmi.h>
+#include <asm/smp.h>
+#include <asm/io.h>
+#include <asm/traps.h>
+
+#include "cpu/mcheck/mce.h"
+
+DECLARE_BITMAP(used_vectors, NR_VECTORS);
+EXPORT_SYMBOL_GPL(used_vectors);
+
+asmlinkage int system_call(void);
+
+/* Do we ignore FPU interrupts ? */
+char ignore_fpu_irq;
+
+/*
+ * The IDT has to be page-aligned to simplify the Pentium
+ * F0 0F bug workaround.. We have a special link segment
+ * for this.
+ */
+gate_desc idt_table[256]
+	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
+#endif
+
+static int ignore_nmis;
+
+static inline void conditional_sti(struct pt_regs *regs)
+{
+	if (regs->flags & X86_EFLAGS_IF)
+		local_irq_enable();
+}
+
+static inline void preempt_conditional_sti(struct pt_regs *regs)
+{
+	inc_preempt_count();
+	if (regs->flags & X86_EFLAGS_IF)
+		local_irq_enable();
+}
+
+static inline void preempt_conditional_cli(struct pt_regs *regs)
+{
+	if (regs->flags & X86_EFLAGS_IF)
+		local_irq_disable();
+	dec_preempt_count();
+}
+
+#ifdef CONFIG_X86_32
+static inline void
+die_if_kernel(const char *str, struct pt_regs *regs, long err)
+{
+	if (!user_mode_vm(regs))
+		die(str, regs, err);
+}
+
+/*
+ * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
+ * invalid offset set (the LAZY one) and the faulting thread has
+ * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS,
+ * we set the offset field correctly and return 1.
+ */
+static int lazy_iobitmap_copy(void)
+{
+	struct thread_struct *thread;
+	struct tss_struct *tss;
+	int cpu;
+
+	cpu = get_cpu();
+	tss = &per_cpu(init_tss, cpu);
+	thread = &current->thread;
+
+	if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
+	    thread->io_bitmap_ptr) {
+		memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
+		       thread->io_bitmap_max);
+		/*
+		 * If the previously set map was extending to higher ports
+		 * than the current one, pad extra space with 0xff (no access).
+		 */
+		if (thread->io_bitmap_max < tss->io_bitmap_max) {
+			memset((char *) tss->io_bitmap +
+				thread->io_bitmap_max, 0xff,
+				tss->io_bitmap_max - thread->io_bitmap_max);
+		}
+		tss->io_bitmap_max = thread->io_bitmap_max;
+		tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
+		tss->io_bitmap_owner = thread;
+		put_cpu();
+
+		return 1;
+	}
+	put_cpu();
+
+	return 0;
+}
+#endif
+
+static void __kprobes
+do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
+	long error_code, siginfo_t *info)
+{
+	struct task_struct *tsk = current;
+
+#ifdef CONFIG_X86_32
+	if (regs->flags & X86_VM_MASK) {
+		/*
+		 * traps 0, 1, 3, 4, and 5 should be forwarded to vm86.
+		 * On nmi (interrupt 2), do_trap should not be called.
+		 */
+		if (trapnr < 6)
+			goto vm86_trap;
+		goto trap_signal;
+	}
+#endif
+
+	if (!user_mode(regs))
+		goto kernel_trap;
+
+#ifdef CONFIG_X86_32
+trap_signal:
+#endif
+	/*
+	 * We want error_code and trap_no set for userspace faults and
+	 * kernelspace faults which result in die(), but not
+	 * kernelspace faults which are fixed up.  die() gives the
+	 * process no chance to handle the signal and notice the
+	 * kernel fault information, so that won't result in polluting
+	 * the information about previously queued, but not yet
+	 * delivered, faults.  See also do_general_protection below.
+	 */
+	tsk->thread.error_code = error_code;
+	tsk->thread.trap_no = trapnr;
+
+#ifdef CONFIG_X86_64
+	if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
+	    printk_ratelimit()) {
+		printk(KERN_INFO
+		       "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
+		       tsk->comm, tsk->pid, str,
+		       regs->ip, regs->sp, error_code);
+		print_vma_addr(" in ", regs->ip);
+		printk("\n");
+	}
+#endif
+
+	if (info)
+		force_sig_info(signr, info, tsk);
+	else
+		force_sig(signr, tsk);
+	return;
+
+kernel_trap:
+	if (!fixup_exception(regs)) {
+		tsk->thread.error_code = error_code;
+		tsk->thread.trap_no = trapnr;
+		die(str, regs, error_code);
+	}
+	return;
+
+#ifdef CONFIG_X86_32
+vm86_trap:
+	if (handle_vm86_trap((struct kernel_vm86_regs *) regs,
+						error_code, trapnr))
+		goto trap_signal;
+	return;
+#endif
+}
+
+#define DO_ERROR(trapnr, signr, str, name)				\
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code)	\
+{									\
+	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
+							== NOTIFY_STOP)	\
+		return;							\
+	conditional_sti(regs);						\
+	do_trap(trapnr, signr, str, regs, error_code, NULL);		\
+}
+
+#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr)		\
+dotraplinkage void do_##name(struct pt_regs *regs, long error_code)	\
+{									\
+	siginfo_t info;							\
+	info.si_signo = signr;						\
+	info.si_errno = 0;						\
+	info.si_code = sicode;						\
+	info.si_addr = (void __user *)siaddr;				\
+	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
+							== NOTIFY_STOP)	\
+		return;							\
+	conditional_sti(regs);						\
+	do_trap(trapnr, signr, str, regs, error_code, &info);		\
+}
+
+DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
+DO_ERROR(4, SIGSEGV, "overflow", overflow)
+DO_ERROR(5, SIGSEGV, "bounds", bounds)
+DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
+DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
+DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
+DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
+#ifdef CONFIG_X86_32
+DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
+#endif
+DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
+
+#ifdef CONFIG_X86_64
+/* Runs on IST stack */
+dotraplinkage void do_stack_segment(struct pt_regs *regs, long error_code)
+{
+	if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
+			12, SIGBUS) == NOTIFY_STOP)
+		return;
+	preempt_conditional_sti(regs);
+	do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
+	preempt_conditional_cli(regs);
+}
+
+dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code)
+{
+	static const char str[] = "double fault";
+	struct task_struct *tsk = current;
+
+	/* Return not checked because double check cannot be ignored */
+	notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
+
+	tsk->thread.error_code = error_code;
+	tsk->thread.trap_no = 8;
+
+	/* This is always a kernel trap and never fixable (and thus must
+	   never return). */
+	for (;;)
+		die(str, regs, error_code);
+}
+#endif
+
+dotraplinkage void __kprobes
+do_general_protection(struct pt_regs *regs, long error_code)
+{
+	struct task_struct *tsk;
+
+	conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
+	if (lazy_iobitmap_copy()) {
+		/* restart the faulting instruction */
+		return;
+	}
+
+	if (regs->flags & X86_VM_MASK)
+		goto gp_in_vm86;
+#endif
+
+	tsk = current;
+	if (!user_mode(regs))
+		goto gp_in_kernel;
+
+	tsk->thread.error_code = error_code;
+	tsk->thread.trap_no = 13;
+
+	if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+			printk_ratelimit()) {
+		printk(KERN_INFO
+			"%s[%d] general protection ip:%lx sp:%lx error:%lx",
+			tsk->comm, task_pid_nr(tsk),
+			regs->ip, regs->sp, error_code);
+		print_vma_addr(" in ", regs->ip);
+		printk("\n");
+	}
+
+	force_sig(SIGSEGV, tsk);
+	return;
+
+#ifdef CONFIG_X86_32
+gp_in_vm86:
+	local_irq_enable();
+	handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
+	return;
+#endif
+
+gp_in_kernel:
+	if (fixup_exception(regs))
+		return;
+
+	tsk->thread.error_code = error_code;
+	tsk->thread.trap_no = 13;
+	if (notify_die(DIE_GPF, "general protection fault", regs,
+				error_code, 13, SIGSEGV) == NOTIFY_STOP)
+		return;
+	die("general protection fault", regs, error_code);
+}
+
+static notrace __kprobes void
+mem_parity_error(unsigned char reason, struct pt_regs *regs)
+{
+	printk(KERN_EMERG
+		"Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
+			reason, smp_processor_id());
+
+	printk(KERN_EMERG
+		"You have some hardware problem, likely on the PCI bus.\n");
+
+#if defined(CONFIG_EDAC)
+	if (edac_handler_set()) {
+		edac_atomic_assert_error();
+		return;
+	}
+#endif
+
+	if (panic_on_unrecovered_nmi)
+		panic("NMI: Not continuing");
+
+	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+
+	/* Clear and disable the memory parity error line. */
+	reason = (reason & 0xf) | 4;
+	outb(reason, 0x61);
+}
+
+static notrace __kprobes void
+io_check_error(unsigned char reason, struct pt_regs *regs)
+{
+	unsigned long i;
+
+	printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
+	show_registers(regs);
+
+	/* Re-enable the IOCK line, wait for a few seconds */
+	reason = (reason & 0xf) | 8;
+	outb(reason, 0x61);
+
+	i = 2000;
+	while (--i)
+		udelay(1000);
+
+	reason &= ~8;
+	outb(reason, 0x61);
+}
+
+static notrace __kprobes void
+unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
+{
+	if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
+			NOTIFY_STOP)
+		return;
+#ifdef CONFIG_MCA
+	/*
+	 * Might actually be able to figure out what the guilty party
+	 * is:
+	 */
+	if (MCA_bus) {
+		mca_handle_nmi();
+		return;
+	}
+#endif
+	printk(KERN_EMERG
+		"Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
+			reason, smp_processor_id());
+
+	printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
+	if (panic_on_unrecovered_nmi)
+		panic("NMI: Not continuing");
+
+	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
+}
+
+static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
+{
+	unsigned char reason = 0;
+	int cpu;
+
+	cpu = smp_processor_id();
+
+	/* Only the BSP gets external NMIs from the system. */
+	if (!cpu)
+		reason = get_nmi_reason();
+
+	if (!(reason & 0xc0)) {
+		if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
+								== NOTIFY_STOP)
+			return;
+#ifdef CONFIG_X86_LOCAL_APIC
+		/*
+		 * Ok, so this is none of the documented NMI sources,
+		 * so it must be the NMI watchdog.
+		 */
+		if (nmi_watchdog_tick(regs, reason))
+			return;
+		if (!do_nmi_callback(regs, cpu))
+			unknown_nmi_error(reason, regs);
+#else
+		unknown_nmi_error(reason, regs);
+#endif
+
+		return;
+	}
+	if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
+		return;
+
+	/* AK: following checks seem to be broken on modern chipsets. FIXME */
+	if (reason & 0x80)
+		mem_parity_error(reason, regs);
+	if (reason & 0x40)
+		io_check_error(reason, regs);
+#ifdef CONFIG_X86_32
+	/*
+	 * Reassert NMI in case it became active meanwhile
+	 * as it's edge-triggered:
+	 */
+	reassert_nmi();
+#endif
+}
+
+dotraplinkage notrace __kprobes void
+do_nmi(struct pt_regs *regs, long error_code)
+{
+	nmi_enter();
+
+#ifdef CONFIG_X86_32
+	{ int cpu; cpu = smp_processor_id(); ++nmi_count(cpu); }
+#else
+	add_pda(__nmi_count, 1);
+#endif
+
+	if (!ignore_nmis)
+		default_do_nmi(regs);
+
+	nmi_exit();
+}
+
+void stop_nmi(void)
+{
+	acpi_nmi_disable();
+	ignore_nmis++;
+}
+
+void restart_nmi(void)
+{
+	ignore_nmis--;
+	acpi_nmi_enable();
+}
+
+/* May run on IST stack. */
+dotraplinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
+{
+#ifdef CONFIG_KPROBES
+	if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
+			== NOTIFY_STOP)
+		return;
+#else
+	if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
+			== NOTIFY_STOP)
+		return;
+#endif
+
+	preempt_conditional_sti(regs);
+	do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
+	preempt_conditional_cli(regs);
+}
+
+#ifdef CONFIG_X86_64
+/* Help handler running on IST stack to switch back to user stack
+   for scheduling or signal handling. The actual stack switch is done in
+   entry.S */
+asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
+{
+	struct pt_regs *regs = eregs;
+	/* Did already sync */
+	if (eregs == (struct pt_regs *)eregs->sp)
+		;
+	/* Exception from user space */
+	else if (user_mode(eregs))
+		regs = task_pt_regs(current);
+	/* Exception from kernel and interrupts are enabled. Move to
+	   kernel process stack. */
+	else if (eregs->flags & X86_EFLAGS_IF)
+		regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
+	if (eregs != regs)
+		*regs = *eregs;
+	return regs;
+}
+#endif
+
+/*
+ * Our handling of the processor debug registers is non-trivial.
+ * We do not clear them on entry and exit from the kernel. Therefore
+ * it is possible to get a watchpoint trap here from inside the kernel.
+ * However, the code in ./ptrace.c has ensured that the user can
+ * only set watchpoints on userspace addresses. Therefore the in-kernel
+ * watchpoint trap can only occur in code which is reading/writing
+ * from user space. Such code must not hold kernel locks (since it
+ * can equally take a page fault), therefore it is safe to call
+ * force_sig_info even though that claims and releases locks.
+ *
+ * Code in ./signal.c ensures that the debug control register
+ * is restored before we deliver any signal, and therefore that
+ * user code runs with the correct debug control register even though
+ * we clear it here.
+ *
+ * Being careful here means that we don't have to be as careful in a
+ * lot of more complicated places (task switching can be a bit lazy
+ * about restoring all the debug state, and ptrace doesn't have to
+ * find every occurrence of the TF bit that could be saved away even
+ * by user code)
+ *
+ * May run on IST stack.
+ */
+dotraplinkage void __kprobes do_debug(struct pt_regs *regs, long error_code)
+{
+	struct task_struct *tsk = current;
+	unsigned long condition;
+	int si_code;
+
+	get_debugreg(condition, 6);
+
+	/*
+	 * The processor cleared BTF, so don't mark that we need it set.
+	 */
+	clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
+	tsk->thread.debugctlmsr = 0;
+
+	if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
+						SIGTRAP) == NOTIFY_STOP)
+		return;
+
+	/* It's safe to allow irq's after DR6 has been saved */
+	preempt_conditional_sti(regs);
+
+	/* Mask out spurious debug traps due to lazy DR7 setting */
+	if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
+		if (!tsk->thread.debugreg7)
+			goto clear_dr7;
+	}
+
+#ifdef CONFIG_X86_32
+	if (regs->flags & X86_VM_MASK)
+		goto debug_vm86;
+#endif
+
+	/* Save debug status register where ptrace can see it */
+	tsk->thread.debugreg6 = condition;
+
+	/*
+	 * Single-stepping through TF: make sure we ignore any events in
+	 * kernel space (but re-enable TF when returning to user mode).
+	 */
+	if (condition & DR_STEP) {
+		if (!user_mode(regs))
+			goto clear_TF_reenable;
+	}
+
+	si_code = get_si_code(condition);
+	/* Ok, finally something we can handle */
+	send_sigtrap(tsk, regs, error_code, si_code);
+
+	/*
+	 * Disable additional traps. They'll be re-enabled when
+	 * the signal is delivered.
+	 */
+clear_dr7:
+	set_debugreg(0, 7);
+	preempt_conditional_cli(regs);
+	return;
+
+#ifdef CONFIG_X86_32
+debug_vm86:
+	handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
+	preempt_conditional_cli(regs);
+	return;
+#endif
+
+clear_TF_reenable:
+	set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
+	regs->flags &= ~X86_EFLAGS_TF;
+	preempt_conditional_cli(regs);
+	return;
+}
+
+#ifdef CONFIG_X86_64
+static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
+{
+	if (fixup_exception(regs))
+		return 1;
+
+	notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
+	/* Illegal floating point operation in the kernel */
+	current->thread.trap_no = trapnr;
+	die(str, regs, 0);
+	return 0;
+}
+#endif
+
+/*
+ * Note that we play around with the 'TS' bit in an attempt to get
+ * the correct behaviour even in the presence of the asynchronous
+ * IRQ13 behaviour
+ */
+void math_error(void __user *ip)
+{
+	struct task_struct *task;
+	siginfo_t info;
+	unsigned short cwd, swd;
+
+	/*
+	 * Save the info for the exception handler and clear the error.
+	 */
+	task = current;
+	save_init_fpu(task);
+	task->thread.trap_no = 16;
+	task->thread.error_code = 0;
+	info.si_signo = SIGFPE;
+	info.si_errno = 0;
+	info.si_code = __SI_FAULT;
+	info.si_addr = ip;
+	/*
+	 * (~cwd & swd) will mask out exceptions that are not set to unmasked
+	 * status.  0x3f is the exception bits in these regs, 0x200 is the
+	 * C1 reg you need in case of a stack fault, 0x040 is the stack
+	 * fault bit.  We should only be taking one exception at a time,
+	 * so if this combination doesn't produce any single exception,
+	 * then we have a bad program that isn't synchronizing its FPU usage
+	 * and it will suffer the consequences since we won't be able to
+	 * fully reproduce the context of the exception
+	 */
+	cwd = get_fpu_cwd(task);
+	swd = get_fpu_swd(task);
+	switch (swd & ~cwd & 0x3f) {
+	case 0x000: /* No unmasked exception */
+#ifdef CONFIG_X86_32
+		return;
+#endif
+	default: /* Multiple exceptions */
+		break;
+	case 0x001: /* Invalid Op */
+		/*
+		 * swd & 0x240 == 0x040: Stack Underflow
+		 * swd & 0x240 == 0x240: Stack Overflow
+		 * User must clear the SF bit (0x40) if set
+		 */
+		info.si_code = FPE_FLTINV;
+		break;
+	case 0x002: /* Denormalize */
+	case 0x010: /* Underflow */
+		info.si_code = FPE_FLTUND;
+		break;
+	case 0x004: /* Zero Divide */
+		info.si_code = FPE_FLTDIV;
+		break;
+	case 0x008: /* Overflow */
+		info.si_code = FPE_FLTOVF;
+		break;
+	case 0x020: /* Precision */
+		info.si_code = FPE_FLTRES;
+		break;
+	}
+	force_sig_info(SIGFPE, &info, task);
+}
+
+dotraplinkage void do_coprocessor_error(struct pt_regs *regs, long error_code)
+{
+	conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
+	ignore_fpu_irq = 1;
+#else
+	if (!user_mode(regs) &&
+	    kernel_math_error(regs, "kernel x87 math error", 16))
+		return;
+#endif
+
+	math_error((void __user *)regs->ip);
+}
+
+static void simd_math_error(void __user *ip)
+{
+	struct task_struct *task;
+	siginfo_t info;
+	unsigned short mxcsr;
+
+	/*
+	 * Save the info for the exception handler and clear the error.
+	 */
+	task = current;
+	save_init_fpu(task);
+	task->thread.trap_no = 19;
+	task->thread.error_code = 0;
+	info.si_signo = SIGFPE;
+	info.si_errno = 0;
+	info.si_code = __SI_FAULT;
+	info.si_addr = ip;
+	/*
+	 * The SIMD FPU exceptions are handled a little differently, as there
+	 * is only a single status/control register.  Thus, to determine which
+	 * unmasked exception was caught we must mask the exception mask bits
+	 * at 0x1f80, and then use these to mask the exception bits at 0x3f.
+	 */
+	mxcsr = get_fpu_mxcsr(task);
+	switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
+	case 0x000:
+	default:
+		break;
+	case 0x001: /* Invalid Op */
+		info.si_code = FPE_FLTINV;
+		break;
+	case 0x002: /* Denormalize */
+	case 0x010: /* Underflow */
+		info.si_code = FPE_FLTUND;
+		break;
+	case 0x004: /* Zero Divide */
+		info.si_code = FPE_FLTDIV;
+		break;
+	case 0x008: /* Overflow */
+		info.si_code = FPE_FLTOVF;
+		break;
+	case 0x020: /* Precision */
+		info.si_code = FPE_FLTRES;
+		break;
+	}
+	force_sig_info(SIGFPE, &info, task);
+}
+
+dotraplinkage void
+do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
+{
+	conditional_sti(regs);
+
+#ifdef CONFIG_X86_32
+	if (cpu_has_xmm) {
+		/* Handle SIMD FPU exceptions on PIII+ processors. */
+		ignore_fpu_irq = 1;
+		simd_math_error((void __user *)regs->ip);
+		return;
+	}
+	/*
+	 * Handle strange cache flush from user space exception
+	 * in all other cases.  This is undocumented behaviour.
+	 */
+	if (regs->flags & X86_VM_MASK) {
+		handle_vm86_fault((struct kernel_vm86_regs *)regs, error_code);
+		return;
+	}
+	current->thread.trap_no = 19;
+	current->thread.error_code = error_code;
+	die_if_kernel("cache flush denied", regs, error_code);
+	force_sig(SIGSEGV, current);
+#else
+	if (!user_mode(regs) &&
+			kernel_math_error(regs, "kernel simd math error", 19))
+		return;
+	simd_math_error((void __user *)regs->ip);
+#endif
+}
+
+dotraplinkage void
+do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
+{
+	conditional_sti(regs);
+#if 0
+	/* No need to warn about this any longer. */
+	printk(KERN_INFO "Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
+#endif
+}
+
+#ifdef CONFIG_X86_32
+unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
+{
+	struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
+	unsigned long base = (kesp - uesp) & -THREAD_SIZE;
+	unsigned long new_kesp = kesp - base;
+	unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
+	__u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS];
+
+	/* Set up base for espfix segment */
+	desc &= 0x00f0ff0000000000ULL;
+	desc |=	((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
+		((((__u64)base) << 32) & 0xff00000000000000ULL) |
+		((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) |
+		(lim_pages & 0xffff);
+	*(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc;
+
+	return new_kesp;
+}
+#else
+asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
+{
+}
+
+asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
+{
+}
+#endif
+
+/*
+ * 'math_state_restore()' saves the current math information in the
+ * old math state array, and gets the new ones from the current task
+ *
+ * Careful.. There are problems with IBM-designed IRQ13 behaviour.
+ * Don't touch unless you *really* know how it works.
+ *
+ * Must be called with kernel preemption disabled (in this case,
+ * local interrupts are disabled at the call-site in entry.S).
+ */
+asmlinkage void math_state_restore(void)
+{
+	struct thread_info *thread = current_thread_info();
+	struct task_struct *tsk = thread->task;
+
+	if (!tsk_used_math(tsk)) {
+		local_irq_enable();
+		/*
+		 * does a slab alloc which can sleep
+		 */
+		if (init_fpu(tsk)) {
+			/*
+			 * ran out of memory!
+			 */
+			do_group_exit(SIGKILL);
+			return;
+		}
+		local_irq_disable();
+	}
+
+	clts();				/* Allow maths ops (or we recurse) */
+#ifdef CONFIG_X86_32
+	restore_fpu(tsk);
+#else
+	/*
+	 * Paranoid restore. send a SIGSEGV if we fail to restore the state.
+	 */
+	if (unlikely(restore_fpu_checking(tsk))) {
+		stts();
+		force_sig(SIGSEGV, tsk);
+		return;
+	}
+#endif
+	thread->status |= TS_USEDFPU;	/* So we fnsave on switch_to() */
+	tsk->fpu_counter++;
+}
+EXPORT_SYMBOL_GPL(math_state_restore);
+
+#ifndef CONFIG_MATH_EMULATION
+asmlinkage void math_emulate(long arg)
+{
+	printk(KERN_EMERG
+		"math-emulation not enabled and no coprocessor found.\n");
+	printk(KERN_EMERG "killing %s.\n", current->comm);
+	force_sig(SIGFPE, current);
+	schedule();
+}
+#endif /* CONFIG_MATH_EMULATION */
+
+dotraplinkage void __kprobes
+do_device_not_available(struct pt_regs *regs, long error)
+{
+#ifdef CONFIG_X86_32
+	if (read_cr0() & X86_CR0_EM) {
+		conditional_sti(regs);
+		math_emulate(0);
+	} else {
+		math_state_restore(); /* interrupts still off */
+		conditional_sti(regs);
+	}
+#else
+	math_state_restore();
+#endif
+}
+
+#ifdef CONFIG_X86_32
+#ifdef CONFIG_X86_MCE
+dotraplinkage void __kprobes do_machine_check(struct pt_regs *regs, long error)
+{
+	conditional_sti(regs);
+	machine_check_vector(regs, error);
+}
+#endif
+
+dotraplinkage void do_iret_error(struct pt_regs *regs, long error_code)
+{
+	siginfo_t info;
+	local_irq_enable();
+
+	info.si_signo = SIGILL;
+	info.si_errno = 0;
+	info.si_code = ILL_BADSTK;
+	info.si_addr = 0;
+	if (notify_die(DIE_TRAP, "iret exception",
+			regs, error_code, 32, SIGILL) == NOTIFY_STOP)
+		return;
+	do_trap(32, SIGILL, "iret exception", regs, error_code, &info);
+}
+#endif
+
+void __init trap_init(void)
+{
+#ifdef CONFIG_X86_32
+	int i;
+#endif
+
+#ifdef CONFIG_EISA
+	void __iomem *p = early_ioremap(0x0FFFD9, 4);
+
+	if (readl(p) == 'E' + ('I'<<8) + ('S'<<16) + ('A'<<24))
+		EISA_bus = 1;
+	early_iounmap(p, 4);
+#endif
+
+	set_intr_gate(0, &divide_error);
+	set_intr_gate_ist(1, &debug, DEBUG_STACK);
+	set_intr_gate_ist(2, &nmi, NMI_STACK);
+	/* int3 can be called from all */
+	set_system_intr_gate_ist(3, &int3, DEBUG_STACK);
+	/* int4 can be called from all */
+	set_system_intr_gate(4, &overflow);
+	set_intr_gate(5, &bounds);
+	set_intr_gate(6, &invalid_op);
+	set_intr_gate(7, &device_not_available);
+#ifdef CONFIG_X86_32
+	set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
+#else
+	set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
+#endif
+	set_intr_gate(9, &coprocessor_segment_overrun);
+	set_intr_gate(10, &invalid_TSS);
+	set_intr_gate(11, &segment_not_present);
+	set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
+	set_intr_gate(13, &general_protection);
+	set_intr_gate(14, &page_fault);
+	set_intr_gate(15, &spurious_interrupt_bug);
+	set_intr_gate(16, &coprocessor_error);
+	set_intr_gate(17, &alignment_check);
+#ifdef CONFIG_X86_MCE
+	set_intr_gate_ist(18, &machine_check, MCE_STACK);
+#endif
+	set_intr_gate(19, &simd_coprocessor_error);
+
+#ifdef CONFIG_IA32_EMULATION
+	set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
+#endif
+
+#ifdef CONFIG_X86_32
+	if (cpu_has_fxsr) {
+		printk(KERN_INFO "Enabling fast FPU save and restore... ");
+		set_in_cr4(X86_CR4_OSFXSR);
+		printk("done.\n");
+	}
+	if (cpu_has_xmm) {
+		printk(KERN_INFO
+			"Enabling unmasked SIMD FPU exception support... ");
+		set_in_cr4(X86_CR4_OSXMMEXCPT);
+		printk("done.\n");
+	}
+
+	set_system_trap_gate(SYSCALL_VECTOR, &system_call);
+
+	/* Reserve all the builtin and the syscall vector: */
+	for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
+		set_bit(i, used_vectors);
+
+	set_bit(SYSCALL_VECTOR, used_vectors);
+#endif
+	/*
+	 * Should be a barrier for any external CPU state:
+	 */
+	cpu_init();
+
+#ifdef CONFIG_X86_32
+	trap_init_hook();
+#endif
+}
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
deleted file mode 100644
index 0429c5d..0000000
--- a/arch/x86/kernel/traps_32.c
+++ /dev/null
@@ -1,1257 +0,0 @@
-/*
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- *
- *  Pentium III FXSR, SSE support
- *	Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'asm.s'.
- */
-#include <linux/interrupt.h>
-#include <linux/kallsyms.h>
-#include <linux/spinlock.h>
-#include <linux/highmem.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/utsname.h>
-#include <linux/kdebug.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/string.h>
-#include <linux/unwind.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/kexec.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-#include <linux/bug.h>
-#include <linux/nmi.h>
-#include <linux/mm.h>
-
-#ifdef CONFIG_EISA
-#include <linux/ioport.h>
-#include <linux/eisa.h>
-#endif
-
-#ifdef CONFIG_MCA
-#include <linux/mca.h>
-#endif
-
-#if defined(CONFIG_EDAC)
-#include <linux/edac.h>
-#endif
-
-#include <asm/arch_hooks.h>
-#include <asm/stacktrace.h>
-#include <asm/processor.h>
-#include <asm/debugreg.h>
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <asm/unwind.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-#include <asm/nmi.h>
-#include <asm/smp.h>
-#include <asm/io.h>
-#include <asm/traps.h>
-
-#include "mach_traps.h"
-
-DECLARE_BITMAP(used_vectors, NR_VECTORS);
-EXPORT_SYMBOL_GPL(used_vectors);
-
-asmlinkage int system_call(void);
-
-/* Do we ignore FPU interrupts ? */
-char ignore_fpu_irq;
-
-/*
- * The IDT has to be page-aligned to simplify the Pentium
- * F0 0F bug workaround.. We have a special link segment
- * for this.
- */
-gate_desc idt_table[256]
-	__attribute__((__section__(".data.idt"))) = { { { { 0, 0 } } }, };
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 24;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-void printk_address(unsigned long address, int reliable)
-{
-#ifdef CONFIG_KALLSYMS
-	unsigned long offset = 0;
-	unsigned long symsize;
-	const char *symname;
-	char *modname;
-	char *delim = ":";
-	char namebuf[KSYM_NAME_LEN];
-	char reliab[4] = "";
-
-	symname = kallsyms_lookup(address, &symsize, &offset,
-					&modname, namebuf);
-	if (!symname) {
-		printk(" [<%08lx>]\n", address);
-		return;
-	}
-	if (!reliable)
-		strcpy(reliab, "? ");
-
-	if (!modname)
-		modname = delim = "";
-	printk(" [<%08lx>] %s%s%s%s%s+0x%lx/0x%lx\n",
-		address, reliab, delim, modname, delim, symname, offset, symsize);
-#else
-	printk(" [<%08lx>]\n", address);
-#endif
-}
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
-			void *p, unsigned int size)
-{
-	void *t = tinfo;
-	return	p > t && p <= t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
-	struct stack_frame *next_frame;
-	unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
-		unsigned long *stack, unsigned long bp,
-		const struct stacktrace_ops *ops, void *data)
-{
-	struct stack_frame *frame = (struct stack_frame *)bp;
-
-	while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
-		unsigned long addr;
-
-		addr = *stack;
-		if (__kernel_text_address(addr)) {
-			if ((unsigned long) stack == bp + 4) {
-				ops->address(data, addr, 1);
-				frame = frame->next_frame;
-				bp = (unsigned long) frame;
-			} else {
-				ops->address(data, addr, bp == 0);
-			}
-		}
-		stack++;
-	}
-	return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp,
-		const struct stacktrace_ops *ops, void *data)
-{
-	if (!task)
-		task = current;
-
-	if (!stack) {
-		unsigned long dummy;
-		stack = &dummy;
-		if (task != current)
-			stack = (unsigned long *)task->thread.sp;
-	}
-
-#ifdef CONFIG_FRAME_POINTER
-	if (!bp) {
-		if (task == current) {
-			/* Grab bp right from our regs */
-			asm("movl %%ebp, %0" : "=r" (bp) :);
-		} else {
-			/* bp is the last reg pushed by switch_to */
-			bp = *(unsigned long *) task->thread.sp;
-		}
-	}
-#endif
-
-	for (;;) {
-		struct thread_info *context;
-
-		context = (struct thread_info *)
-			((unsigned long)stack & (~(THREAD_SIZE - 1)));
-		bp = print_context_stack(context, stack, bp, ops, data);
-		/*
-		 * Should be after the line below, but somewhere
-		 * in early boot context comes out corrupted and we
-		 * can't reference it:
-		 */
-		if (ops->stack(data, "IRQ") < 0)
-			break;
-		stack = (unsigned long *)context->previous_esp;
-		if (!stack)
-			break;
-		touch_nmi_watchdog();
-	}
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
-	printk(data);
-	print_symbol(msg, symbol);
-	printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
-	printk("%s%s\n", (char *)data, msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
-	return 0;
-}
-
-/*
- * Print one address/symbol entries per line.
- */
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
-	printk("%s [<%08lx>] ", (char *)data, addr);
-	if (!reliable)
-		printk("? ");
-	print_symbol("%s\n", addr);
-	touch_nmi_watchdog();
-}
-
-static const struct stacktrace_ops print_trace_ops = {
-	.warning = print_trace_warning,
-	.warning_symbol = print_trace_warning_symbol,
-	.stack = print_trace_stack,
-	.address = print_trace_address,
-};
-
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp, char *log_lvl)
-{
-	dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
-	printk("%s =======================\n", log_lvl);
-}
-
-void show_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp)
-{
-	show_trace_log_lvl(task, regs, stack, bp, "");
-}
-
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-		   unsigned long *sp, unsigned long bp, char *log_lvl)
-{
-	unsigned long *stack;
-	int i;
-
-	if (sp == NULL) {
-		if (task)
-			sp = (unsigned long *)task->thread.sp;
-		else
-			sp = (unsigned long *)&sp;
-	}
-
-	stack = sp;
-	for (i = 0; i < kstack_depth_to_print; i++) {
-		if (kstack_end(stack))
-			break;
-		if (i && ((i % 8) == 0))
-			printk("\n%s       ", log_lvl);
-		printk("%08lx ", *stack++);
-	}
-	printk("\n%sCall Trace:\n", log_lvl);
-
-	show_trace_log_lvl(task, regs, sp, bp, log_lvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *sp)
-{
-	printk("       ");
-	show_stack_log_lvl(task, NULL, sp, 0, "");
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	unsigned long bp = 0;
-	unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
-	if (!bp)
-		asm("movl %%ebp, %0" : "=r" (bp):);
-#endif
-
-	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
-		current->pid, current->comm, print_tainted(),
-		init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
-
-	show_trace(current, NULL, &stack, bp);
-}
-
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
-	int i;
-
-	print_modules();
-	__show_registers(regs, 0);
-
-	printk(KERN_EMERG "Process %.*s (pid: %d, ti=%p task=%p task.ti=%p)",
-		TASK_COMM_LEN, current->comm, task_pid_nr(current),
-		current_thread_info(), current, task_thread_info(current));
-	/*
-	 * When in-kernel, we also print out the stack and code at the
-	 * time of the fault..
-	 */
-	if (!user_mode_vm(regs)) {
-		unsigned int code_prologue = code_bytes * 43 / 64;
-		unsigned int code_len = code_bytes;
-		unsigned char c;
-		u8 *ip;
-
-		printk("\n" KERN_EMERG "Stack: ");
-		show_stack_log_lvl(NULL, regs, &regs->sp, 0, KERN_EMERG);
-
-		printk(KERN_EMERG "Code: ");
-
-		ip = (u8 *)regs->ip - code_prologue;
-		if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
-			/* try starting at EIP */
-			ip = (u8 *)regs->ip;
-			code_len = code_len - code_prologue + 1;
-		}
-		for (i = 0; i < code_len; i++, ip++) {
-			if (ip < (u8 *)PAGE_OFFSET ||
-					probe_kernel_address(ip, c)) {
-				printk(" Bad EIP value.");
-				break;
-			}
-			if (ip == (u8 *)regs->ip)
-				printk("<%02x> ", c);
-			else
-				printk("%02x ", c);
-		}
-	}
-	printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
-	unsigned short ud2;
-
-	if (ip < PAGE_OFFSET)
-		return 0;
-	if (probe_kernel_address((unsigned short *)ip, ud2))
-		return 0;
-
-	return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
-	unsigned long flags;
-
-	oops_enter();
-
-	if (die_owner != raw_smp_processor_id()) {
-		console_verbose();
-		raw_local_irq_save(flags);
-		__raw_spin_lock(&die_lock);
-		die_owner = smp_processor_id();
-		die_nest_count = 0;
-		bust_spinlocks(1);
-	} else {
-		raw_local_irq_save(flags);
-	}
-	die_nest_count++;
-	return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
-	bust_spinlocks(0);
-	die_owner = -1;
-	add_taint(TAINT_DIE);
-	__raw_spin_unlock(&die_lock);
-	raw_local_irq_restore(flags);
-
-	if (!regs)
-		return;
-
-	if (kexec_should_crash(current))
-		crash_kexec(regs);
-
-	if (in_interrupt())
-		panic("Fatal exception in interrupt");
-
-	if (panic_on_oops)
-		panic("Fatal exception");
-
-	oops_exit();
-	do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
-	unsigned short ss;
-	unsigned long sp;
-
-	printk(KERN_EMERG "%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
-	printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
-	printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
-	printk("DEBUG_PAGEALLOC");
-#endif
-	printk("\n");
-	if (notify_die(DIE_OOPS, str, regs, err,
-			current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
-		return 1;
-
-	show_registers(regs);
-	/* Executive summary in case the oops scrolled away */
-	sp = (unsigned long) (&regs->sp);
-	savesegment(ss, ss);
-	if (user_mode(regs)) {
-		sp = regs->sp;
-		ss = regs->ss & 0xffff;
-	}
-	printk(KERN_EMERG "EIP: [<%08lx>] ", regs->ip);
-	print_symbol("%s", regs->ip);
-	printk(" SS:ESP %04x:%08lx\n", ss, sp);
-	return 0;
-}
-
-/*
- * This is gone through when something in the kernel has done something bad
- * and is about to be terminated:
- */
-void die(const char *str, struct pt_regs *regs, long err)
-{
-	unsigned long flags = oops_begin();
-
-	if (die_nest_count < 3) {
-		report_bug(regs->ip, regs);
-
-		if (__die(str, regs, err))
-			regs = NULL;
-	} else {
-		printk(KERN_EMERG "Recursive die() failure, output suppressed\n");
-	}
-
-	oops_end(flags, regs, SIGSEGV);
-}
-
-static inline void
-die_if_kernel(const char *str, struct pt_regs *regs, long err)
-{
-	if (!user_mode_vm(regs))
-		die(str, regs, err);
-}
-
-static void __kprobes
-do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs *regs,
-	long error_code, siginfo_t *info)
-{
-	struct task_struct *tsk = current;
-
-	if (regs->flags & X86_VM_MASK) {
-		if (vm86)
-			goto vm86_trap;
-		goto trap_signal;
-	}
-
-	if (!user_mode(regs))
-		goto kernel_trap;
-
-trap_signal:
-	/*
-	 * We want error_code and trap_no set for userspace faults and
-	 * kernelspace faults which result in die(), but not
-	 * kernelspace faults which are fixed up.  die() gives the
-	 * process no chance to handle the signal and notice the
-	 * kernel fault information, so that won't result in polluting
-	 * the information about previously queued, but not yet
-	 * delivered, faults.  See also do_general_protection below.
-	 */
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = trapnr;
-
-	if (info)
-		force_sig_info(signr, info, tsk);
-	else
-		force_sig(signr, tsk);
-	return;
-
-kernel_trap:
-	if (!fixup_exception(regs)) {
-		tsk->thread.error_code = error_code;
-		tsk->thread.trap_no = trapnr;
-		die(str, regs, error_code);
-	}
-	return;
-
-vm86_trap:
-	if (handle_vm86_trap((struct kernel_vm86_regs *) regs,
-						error_code, trapnr))
-		goto trap_signal;
-	return;
-}
-
-#define DO_ERROR(trapnr, signr, str, name)				\
-void do_##name(struct pt_regs *regs, long error_code)			\
-{									\
-	trace_hardirqs_fixup();						\
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
-							== NOTIFY_STOP)	\
-		return;							\
-	do_trap(trapnr, signr, str, 0, regs, error_code, NULL);		\
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr, irq)	\
-void do_##name(struct pt_regs *regs, long error_code)			\
-{									\
-	siginfo_t info;							\
-	if (irq)							\
-		local_irq_enable();					\
-	info.si_signo = signr;						\
-	info.si_errno = 0;						\
-	info.si_code = sicode;						\
-	info.si_addr = (void __user *)siaddr;				\
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
-							== NOTIFY_STOP)	\
-		return;							\
-	do_trap(trapnr, signr, str, 0, regs, error_code, &info);	\
-}
-
-#define DO_VM86_ERROR(trapnr, signr, str, name)				\
-void do_##name(struct pt_regs *regs, long error_code)			\
-{									\
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
-							== NOTIFY_STOP)	\
-		return;							\
-	do_trap(trapnr, signr, str, 1, regs, error_code, NULL);		\
-}
-
-#define DO_VM86_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr)	\
-void do_##name(struct pt_regs *regs, long error_code)			\
-{									\
-	siginfo_t info;							\
-	info.si_signo = signr;						\
-	info.si_errno = 0;						\
-	info.si_code = sicode;						\
-	info.si_addr = (void __user *)siaddr;				\
-	trace_hardirqs_fixup();						\
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
-							== NOTIFY_STOP)	\
-		return;							\
-	do_trap(trapnr, signr, str, 1, regs, error_code, &info);	\
-}
-
-DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-#ifndef CONFIG_KPROBES
-DO_VM86_ERROR(3, SIGTRAP, "int3", int3)
-#endif
-DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_VM86_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip, 0)
-DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
-DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
-DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0, 0)
-DO_ERROR_INFO(32, SIGILL, "iret exception", iret_error, ILL_BADSTK, 0, 1)
-
-void __kprobes
-do_general_protection(struct pt_regs *regs, long error_code)
-{
-	struct task_struct *tsk;
-	struct thread_struct *thread;
-	struct tss_struct *tss;
-	int cpu;
-
-	cpu = get_cpu();
-	tss = &per_cpu(init_tss, cpu);
-	thread = &current->thread;
-
-	/*
-	 * Perform the lazy TSS's I/O bitmap copy. If the TSS has an
-	 * invalid offset set (the LAZY one) and the faulting thread has
-	 * a valid I/O bitmap pointer, we copy the I/O bitmap in the TSS
-	 * and we set the offset field correctly. Then we let the CPU to
-	 * restart the faulting instruction.
-	 */
-	if (tss->x86_tss.io_bitmap_base == INVALID_IO_BITMAP_OFFSET_LAZY &&
-	    thread->io_bitmap_ptr) {
-		memcpy(tss->io_bitmap, thread->io_bitmap_ptr,
-		       thread->io_bitmap_max);
-		/*
-		 * If the previously set map was extending to higher ports
-		 * than the current one, pad extra space with 0xff (no access).
-		 */
-		if (thread->io_bitmap_max < tss->io_bitmap_max) {
-			memset((char *) tss->io_bitmap +
-				thread->io_bitmap_max, 0xff,
-				tss->io_bitmap_max - thread->io_bitmap_max);
-		}
-		tss->io_bitmap_max = thread->io_bitmap_max;
-		tss->x86_tss.io_bitmap_base = IO_BITMAP_OFFSET;
-		tss->io_bitmap_owner = thread;
-		put_cpu();
-
-		return;
-	}
-	put_cpu();
-
-	if (regs->flags & X86_VM_MASK)
-		goto gp_in_vm86;
-
-	tsk = current;
-	if (!user_mode(regs))
-		goto gp_in_kernel;
-
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = 13;
-
-	if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
-			printk_ratelimit()) {
-		printk(KERN_INFO
-			"%s[%d] general protection ip:%lx sp:%lx error:%lx",
-			tsk->comm, task_pid_nr(tsk),
-			regs->ip, regs->sp, error_code);
-		print_vma_addr(" in ", regs->ip);
-		printk("\n");
-	}
-
-	force_sig(SIGSEGV, tsk);
-	return;
-
-gp_in_vm86:
-	local_irq_enable();
-	handle_vm86_fault((struct kernel_vm86_regs *) regs, error_code);
-	return;
-
-gp_in_kernel:
-	if (fixup_exception(regs))
-		return;
-
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = 13;
-	if (notify_die(DIE_GPF, "general protection fault", regs,
-				error_code, 13, SIGSEGV) == NOTIFY_STOP)
-		return;
-	die("general protection fault", regs, error_code);
-}
-
-static notrace __kprobes void
-mem_parity_error(unsigned char reason, struct pt_regs *regs)
-{
-	printk(KERN_EMERG
-		"Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
-			reason, smp_processor_id());
-
-	printk(KERN_EMERG
-		"You have some hardware problem, likely on the PCI bus.\n");
-
-#if defined(CONFIG_EDAC)
-	if (edac_handler_set()) {
-		edac_atomic_assert_error();
-		return;
-	}
-#endif
-
-	if (panic_on_unrecovered_nmi)
-		panic("NMI: Not continuing");
-
-	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-
-	/* Clear and disable the memory parity error line. */
-	clear_mem_error(reason);
-}
-
-static notrace __kprobes void
-io_check_error(unsigned char reason, struct pt_regs *regs)
-{
-	unsigned long i;
-
-	printk(KERN_EMERG "NMI: IOCK error (debug interrupt?)\n");
-	show_registers(regs);
-
-	/* Re-enable the IOCK line, wait for a few seconds */
-	reason = (reason & 0xf) | 8;
-	outb(reason, 0x61);
-
-	i = 2000;
-	while (--i)
-		udelay(1000);
-
-	reason &= ~8;
-	outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
-{
-	if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
-		return;
-#ifdef CONFIG_MCA
-	/*
-	 * Might actually be able to figure out what the guilty party
-	 * is:
-	 */
-	if (MCA_bus) {
-		mca_handle_nmi();
-		return;
-	}
-#endif
-	printk(KERN_EMERG
-		"Uhhuh. NMI received for unknown reason %02x on CPU %d.\n",
-			reason, smp_processor_id());
-
-	printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
-	if (panic_on_unrecovered_nmi)
-		panic("NMI: Not continuing");
-
-	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-}
-
-static DEFINE_SPINLOCK(nmi_print_lock);
-
-void notrace __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic)
-{
-	if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
-		return;
-
-	spin_lock(&nmi_print_lock);
-	/*
-	* We are in trouble anyway, lets at least try
-	* to get a message out:
-	*/
-	bust_spinlocks(1);
-	printk(KERN_EMERG "%s", str);
-	printk(" on CPU%d, ip %08lx, registers:\n",
-		smp_processor_id(), regs->ip);
-	show_registers(regs);
-	if (do_panic)
-		panic("Non maskable interrupt");
-	console_silent();
-	spin_unlock(&nmi_print_lock);
-	bust_spinlocks(0);
-
-	/*
-	 * If we are in kernel we are probably nested up pretty bad
-	 * and might aswell get out now while we still can:
-	 */
-	if (!user_mode_vm(regs)) {
-		current->thread.trap_no = 2;
-		crash_kexec(regs);
-	}
-
-	do_exit(SIGSEGV);
-}
-
-static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
-{
-	unsigned char reason = 0;
-	int cpu;
-
-	cpu = smp_processor_id();
-
-	/* Only the BSP gets external NMIs from the system. */
-	if (!cpu)
-		reason = get_nmi_reason();
-
-	if (!(reason & 0xc0)) {
-		if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
-								== NOTIFY_STOP)
-			return;
-#ifdef CONFIG_X86_LOCAL_APIC
-		/*
-		 * Ok, so this is none of the documented NMI sources,
-		 * so it must be the NMI watchdog.
-		 */
-		if (nmi_watchdog_tick(regs, reason))
-			return;
-		if (!do_nmi_callback(regs, cpu))
-			unknown_nmi_error(reason, regs);
-#else
-		unknown_nmi_error(reason, regs);
-#endif
-
-		return;
-	}
-	if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
-		return;
-
-	/* AK: following checks seem to be broken on modern chipsets. FIXME */
-	if (reason & 0x80)
-		mem_parity_error(reason, regs);
-	if (reason & 0x40)
-		io_check_error(reason, regs);
-	/*
-	 * Reassert NMI in case it became active meanwhile
-	 * as it's edge-triggered:
-	 */
-	reassert_nmi();
-}
-
-notrace __kprobes void do_nmi(struct pt_regs *regs, long error_code)
-{
-	int cpu;
-
-	nmi_enter();
-
-	cpu = smp_processor_id();
-
-	++nmi_count(cpu);
-
-	if (!ignore_nmis)
-		default_do_nmi(regs);
-
-	nmi_exit();
-}
-
-void stop_nmi(void)
-{
-	acpi_nmi_disable();
-	ignore_nmis++;
-}
-
-void restart_nmi(void)
-{
-	ignore_nmis--;
-	acpi_nmi_enable();
-}
-
-#ifdef CONFIG_KPROBES
-void __kprobes do_int3(struct pt_regs *regs, long error_code)
-{
-	trace_hardirqs_fixup();
-
-	if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
-			== NOTIFY_STOP)
-		return;
-	/*
-	 * This is an interrupt gate, because kprobes wants interrupts
-	 * disabled. Normal trap handlers don't.
-	 */
-	restore_interrupts(regs);
-
-	do_trap(3, SIGTRAP, "int3", 1, regs, error_code, NULL);
-}
-#endif
-
-/*
- * Our handling of the processor debug registers is non-trivial.
- * We do not clear them on entry and exit from the kernel. Therefore
- * it is possible to get a watchpoint trap here from inside the kernel.
- * However, the code in ./ptrace.c has ensured that the user can
- * only set watchpoints on userspace addresses. Therefore the in-kernel
- * watchpoint trap can only occur in code which is reading/writing
- * from user space. Such code must not hold kernel locks (since it
- * can equally take a page fault), therefore it is safe to call
- * force_sig_info even though that claims and releases locks.
- *
- * Code in ./signal.c ensures that the debug control register
- * is restored before we deliver any signal, and therefore that
- * user code runs with the correct debug control register even though
- * we clear it here.
- *
- * Being careful here means that we don't have to be as careful in a
- * lot of more complicated places (task switching can be a bit lazy
- * about restoring all the debug state, and ptrace doesn't have to
- * find every occurrence of the TF bit that could be saved away even
- * by user code)
- */
-void __kprobes do_debug(struct pt_regs *regs, long error_code)
-{
-	struct task_struct *tsk = current;
-	unsigned int condition;
-	int si_code;
-
-	trace_hardirqs_fixup();
-
-	get_debugreg(condition, 6);
-
-	/*
-	 * The processor cleared BTF, so don't mark that we need it set.
-	 */
-	clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
-	tsk->thread.debugctlmsr = 0;
-
-	if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
-						SIGTRAP) == NOTIFY_STOP)
-		return;
-	/* It's safe to allow irq's after DR6 has been saved */
-	if (regs->flags & X86_EFLAGS_IF)
-		local_irq_enable();
-
-	/* Mask out spurious debug traps due to lazy DR7 setting */
-	if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
-		if (!tsk->thread.debugreg7)
-			goto clear_dr7;
-	}
-
-	if (regs->flags & X86_VM_MASK)
-		goto debug_vm86;
-
-	/* Save debug status register where ptrace can see it */
-	tsk->thread.debugreg6 = condition;
-
-	/*
-	 * Single-stepping through TF: make sure we ignore any events in
-	 * kernel space (but re-enable TF when returning to user mode).
-	 */
-	if (condition & DR_STEP) {
-		/*
-		 * We already checked v86 mode above, so we can
-		 * check for kernel mode by just checking the CPL
-		 * of CS.
-		 */
-		if (!user_mode(regs))
-			goto clear_TF_reenable;
-	}
-
-	si_code = get_si_code((unsigned long)condition);
-	/* Ok, finally something we can handle */
-	send_sigtrap(tsk, regs, error_code, si_code);
-
-	/*
-	 * Disable additional traps. They'll be re-enabled when
-	 * the signal is delivered.
-	 */
-clear_dr7:
-	set_debugreg(0, 7);
-	return;
-
-debug_vm86:
-	handle_vm86_trap((struct kernel_vm86_regs *) regs, error_code, 1);
-	return;
-
-clear_TF_reenable:
-	set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
-	regs->flags &= ~X86_EFLAGS_TF;
-	return;
-}
-
-/*
- * Note that we play around with the 'TS' bit in an attempt to get
- * the correct behaviour even in the presence of the asynchronous
- * IRQ13 behaviour
- */
-void math_error(void __user *ip)
-{
-	struct task_struct *task;
-	siginfo_t info;
-	unsigned short cwd, swd;
-
-	/*
-	 * Save the info for the exception handler and clear the error.
-	 */
-	task = current;
-	save_init_fpu(task);
-	task->thread.trap_no = 16;
-	task->thread.error_code = 0;
-	info.si_signo = SIGFPE;
-	info.si_errno = 0;
-	info.si_code = __SI_FAULT;
-	info.si_addr = ip;
-	/*
-	 * (~cwd & swd) will mask out exceptions that are not set to unmasked
-	 * status.  0x3f is the exception bits in these regs, 0x200 is the
-	 * C1 reg you need in case of a stack fault, 0x040 is the stack
-	 * fault bit.  We should only be taking one exception at a time,
-	 * so if this combination doesn't produce any single exception,
-	 * then we have a bad program that isn't synchronizing its FPU usage
-	 * and it will suffer the consequences since we won't be able to
-	 * fully reproduce the context of the exception
-	 */
-	cwd = get_fpu_cwd(task);
-	swd = get_fpu_swd(task);
-	switch (swd & ~cwd & 0x3f) {
-	case 0x000: /* No unmasked exception */
-		return;
-	default: /* Multiple exceptions */
-		break;
-	case 0x001: /* Invalid Op */
-		/*
-		 * swd & 0x240 == 0x040: Stack Underflow
-		 * swd & 0x240 == 0x240: Stack Overflow
-		 * User must clear the SF bit (0x40) if set
-		 */
-		info.si_code = FPE_FLTINV;
-		break;
-	case 0x002: /* Denormalize */
-	case 0x010: /* Underflow */
-		info.si_code = FPE_FLTUND;
-		break;
-	case 0x004: /* Zero Divide */
-		info.si_code = FPE_FLTDIV;
-		break;
-	case 0x008: /* Overflow */
-		info.si_code = FPE_FLTOVF;
-		break;
-	case 0x020: /* Precision */
-		info.si_code = FPE_FLTRES;
-		break;
-	}
-	force_sig_info(SIGFPE, &info, task);
-}
-
-void do_coprocessor_error(struct pt_regs *regs, long error_code)
-{
-	ignore_fpu_irq = 1;
-	math_error((void __user *)regs->ip);
-}
-
-static void simd_math_error(void __user *ip)
-{
-	struct task_struct *task;
-	siginfo_t info;
-	unsigned short mxcsr;
-
-	/*
-	 * Save the info for the exception handler and clear the error.
-	 */
-	task = current;
-	save_init_fpu(task);
-	task->thread.trap_no = 19;
-	task->thread.error_code = 0;
-	info.si_signo = SIGFPE;
-	info.si_errno = 0;
-	info.si_code = __SI_FAULT;
-	info.si_addr = ip;
-	/*
-	 * The SIMD FPU exceptions are handled a little differently, as there
-	 * is only a single status/control register.  Thus, to determine which
-	 * unmasked exception was caught we must mask the exception mask bits
-	 * at 0x1f80, and then use these to mask the exception bits at 0x3f.
-	 */
-	mxcsr = get_fpu_mxcsr(task);
-	switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
-	case 0x000:
-	default:
-		break;
-	case 0x001: /* Invalid Op */
-		info.si_code = FPE_FLTINV;
-		break;
-	case 0x002: /* Denormalize */
-	case 0x010: /* Underflow */
-		info.si_code = FPE_FLTUND;
-		break;
-	case 0x004: /* Zero Divide */
-		info.si_code = FPE_FLTDIV;
-		break;
-	case 0x008: /* Overflow */
-		info.si_code = FPE_FLTOVF;
-		break;
-	case 0x020: /* Precision */
-		info.si_code = FPE_FLTRES;
-		break;
-	}
-	force_sig_info(SIGFPE, &info, task);
-}
-
-void do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
-{
-	if (cpu_has_xmm) {
-		/* Handle SIMD FPU exceptions on PIII+ processors. */
-		ignore_fpu_irq = 1;
-		simd_math_error((void __user *)regs->ip);
-		return;
-	}
-	/*
-	 * Handle strange cache flush from user space exception
-	 * in all other cases.  This is undocumented behaviour.
-	 */
-	if (regs->flags & X86_VM_MASK) {
-		handle_vm86_fault((struct kernel_vm86_regs *)regs, error_code);
-		return;
-	}
-	current->thread.trap_no = 19;
-	current->thread.error_code = error_code;
-	die_if_kernel("cache flush denied", regs, error_code);
-	force_sig(SIGSEGV, current);
-}
-
-void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
-{
-#if 0
-	/* No need to warn about this any longer. */
-	printk(KERN_INFO "Ignoring P6 Local APIC Spurious Interrupt Bug...\n");
-#endif
-}
-
-unsigned long patch_espfix_desc(unsigned long uesp, unsigned long kesp)
-{
-	struct desc_struct *gdt = get_cpu_gdt_table(smp_processor_id());
-	unsigned long base = (kesp - uesp) & -THREAD_SIZE;
-	unsigned long new_kesp = kesp - base;
-	unsigned long lim_pages = (new_kesp | (THREAD_SIZE - 1)) >> PAGE_SHIFT;
-	__u64 desc = *(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS];
-
-	/* Set up base for espfix segment */
-	desc &= 0x00f0ff0000000000ULL;
-	desc |=	((((__u64)base) << 16) & 0x000000ffffff0000ULL) |
-		((((__u64)base) << 32) & 0xff00000000000000ULL) |
-		((((__u64)lim_pages) << 32) & 0x000f000000000000ULL) |
-		(lim_pages & 0xffff);
-	*(__u64 *)&gdt[GDT_ENTRY_ESPFIX_SS] = desc;
-
-	return new_kesp;
-}
-
-/*
- * 'math_state_restore()' saves the current math information in the
- * old math state array, and gets the new ones from the current task
- *
- * Careful.. There are problems with IBM-designed IRQ13 behaviour.
- * Don't touch unless you *really* know how it works.
- *
- * Must be called with kernel preemption disabled (in this case,
- * local interrupts are disabled at the call-site in entry.S).
- */
-asmlinkage void math_state_restore(void)
-{
-	struct thread_info *thread = current_thread_info();
-	struct task_struct *tsk = thread->task;
-
-	if (!tsk_used_math(tsk)) {
-		local_irq_enable();
-		/*
-		 * does a slab alloc which can sleep
-		 */
-		if (init_fpu(tsk)) {
-			/*
-			 * ran out of memory!
-			 */
-			do_group_exit(SIGKILL);
-			return;
-		}
-		local_irq_disable();
-	}
-
-	clts();				/* Allow maths ops (or we recurse) */
-	restore_fpu(tsk);
-	thread->status |= TS_USEDFPU;	/* So we fnsave on switch_to() */
-	tsk->fpu_counter++;
-}
-EXPORT_SYMBOL_GPL(math_state_restore);
-
-#ifndef CONFIG_MATH_EMULATION
-
-asmlinkage void math_emulate(long arg)
-{
-	printk(KERN_EMERG
-		"math-emulation not enabled and no coprocessor found.\n");
-	printk(KERN_EMERG "killing %s.\n", current->comm);
-	force_sig(SIGFPE, current);
-	schedule();
-}
-
-#endif /* CONFIG_MATH_EMULATION */
-
-void __init trap_init(void)
-{
-	int i;
-
-#ifdef CONFIG_EISA
-	void __iomem *p = early_ioremap(0x0FFFD9, 4);
-
-	if (readl(p) == 'E' + ('I'<<8) + ('S'<<16) + ('A'<<24))
-		EISA_bus = 1;
-	early_iounmap(p, 4);
-#endif
-
-	set_trap_gate(0, &divide_error);
-	set_intr_gate(1, &debug);
-	set_intr_gate(2, &nmi);
-	set_system_intr_gate(3, &int3); /* int3 can be called from all */
-	set_system_gate(4, &overflow); /* int4 can be called from all */
-	set_trap_gate(5, &bounds);
-	set_trap_gate(6, &invalid_op);
-	set_trap_gate(7, &device_not_available);
-	set_task_gate(8, GDT_ENTRY_DOUBLEFAULT_TSS);
-	set_trap_gate(9, &coprocessor_segment_overrun);
-	set_trap_gate(10, &invalid_TSS);
-	set_trap_gate(11, &segment_not_present);
-	set_trap_gate(12, &stack_segment);
-	set_trap_gate(13, &general_protection);
-	set_intr_gate(14, &page_fault);
-	set_trap_gate(15, &spurious_interrupt_bug);
-	set_trap_gate(16, &coprocessor_error);
-	set_trap_gate(17, &alignment_check);
-#ifdef CONFIG_X86_MCE
-	set_trap_gate(18, &machine_check);
-#endif
-	set_trap_gate(19, &simd_coprocessor_error);
-
-	if (cpu_has_fxsr) {
-		printk(KERN_INFO "Enabling fast FPU save and restore... ");
-		set_in_cr4(X86_CR4_OSFXSR);
-		printk("done.\n");
-	}
-	if (cpu_has_xmm) {
-		printk(KERN_INFO
-			"Enabling unmasked SIMD FPU exception support... ");
-		set_in_cr4(X86_CR4_OSXMMEXCPT);
-		printk("done.\n");
-	}
-
-	set_system_gate(SYSCALL_VECTOR, &system_call);
-
-	/* Reserve all the builtin and the syscall vector: */
-	for (i = 0; i < FIRST_EXTERNAL_VECTOR; i++)
-		set_bit(i, used_vectors);
-
-	set_bit(SYSCALL_VECTOR, used_vectors);
-
-	/*
-	 * Should be a barrier for any external CPU state:
-	 */
-	cpu_init();
-
-	trap_init_hook();
-}
-
-static int __init kstack_setup(char *s)
-{
-	kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-
-	return 1;
-}
-__setup("kstack=", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
-	code_bytes = simple_strtoul(s, NULL, 0);
-	if (code_bytes > 8192)
-		code_bytes = 8192;
-
-	return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
deleted file mode 100644
index 9c0ac0c..0000000
--- a/arch/x86/kernel/traps_64.c
+++ /dev/null
@@ -1,1214 +0,0 @@
-/*
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- *
- *  Pentium III FXSR, SSE support
- *	Gareth Hughes <gareth@valinux.com>, May 2000
- */
-
-/*
- * 'Traps.c' handles hardware traps and faults after we have saved some
- * state in 'entry.S'.
- */
-#include <linux/moduleparam.h>
-#include <linux/interrupt.h>
-#include <linux/kallsyms.h>
-#include <linux/spinlock.h>
-#include <linux/kprobes.h>
-#include <linux/uaccess.h>
-#include <linux/utsname.h>
-#include <linux/kdebug.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/ptrace.h>
-#include <linux/string.h>
-#include <linux/unwind.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/kexec.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/init.h>
-#include <linux/bug.h>
-#include <linux/nmi.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/io.h>
-
-#if defined(CONFIG_EDAC)
-#include <linux/edac.h>
-#endif
-
-#include <asm/stacktrace.h>
-#include <asm/processor.h>
-#include <asm/debugreg.h>
-#include <asm/atomic.h>
-#include <asm/system.h>
-#include <asm/unwind.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-#include <asm/pgalloc.h>
-#include <asm/proto.h>
-#include <asm/pda.h>
-#include <asm/traps.h>
-
-#include <mach_traps.h>
-
-int panic_on_unrecovered_nmi;
-int kstack_depth_to_print = 12;
-static unsigned int code_bytes = 64;
-static int ignore_nmis;
-static int die_counter;
-
-static inline void conditional_sti(struct pt_regs *regs)
-{
-	if (regs->flags & X86_EFLAGS_IF)
-		local_irq_enable();
-}
-
-static inline void preempt_conditional_sti(struct pt_regs *regs)
-{
-	inc_preempt_count();
-	if (regs->flags & X86_EFLAGS_IF)
-		local_irq_enable();
-}
-
-static inline void preempt_conditional_cli(struct pt_regs *regs)
-{
-	if (regs->flags & X86_EFLAGS_IF)
-		local_irq_disable();
-	/* Make sure to not schedule here because we could be running
-	   on an exception stack. */
-	dec_preempt_count();
-}
-
-void printk_address(unsigned long address, int reliable)
-{
-	printk(" [<%016lx>] %s%pS\n",
-			address, reliable ?	"" : "? ", (void *) address);
-}
-
-static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack,
-					unsigned *usedp, char **idp)
-{
-	static char ids[][8] = {
-		[DEBUG_STACK - 1] = "#DB",
-		[NMI_STACK - 1] = "NMI",
-		[DOUBLEFAULT_STACK - 1] = "#DF",
-		[STACKFAULT_STACK - 1] = "#SS",
-		[MCE_STACK - 1] = "#MC",
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
-		[N_EXCEPTION_STACKS ...
-			N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]"
-#endif
-	};
-	unsigned k;
-
-	/*
-	 * Iterate over all exception stacks, and figure out whether
-	 * 'stack' is in one of them:
-	 */
-	for (k = 0; k < N_EXCEPTION_STACKS; k++) {
-		unsigned long end = per_cpu(orig_ist, cpu).ist[k];
-		/*
-		 * Is 'stack' above this exception frame's end?
-		 * If yes then skip to the next frame.
-		 */
-		if (stack >= end)
-			continue;
-		/*
-		 * Is 'stack' above this exception frame's start address?
-		 * If yes then we found the right frame.
-		 */
-		if (stack >= end - EXCEPTION_STKSZ) {
-			/*
-			 * Make sure we only iterate through an exception
-			 * stack once. If it comes up for the second time
-			 * then there's something wrong going on - just
-			 * break out and return NULL:
-			 */
-			if (*usedp & (1U << k))
-				break;
-			*usedp |= 1U << k;
-			*idp = ids[k];
-			return (unsigned long *)end;
-		}
-		/*
-		 * If this is a debug stack, and if it has a larger size than
-		 * the usual exception stacks, then 'stack' might still
-		 * be within the lower portion of the debug stack:
-		 */
-#if DEBUG_STKSZ > EXCEPTION_STKSZ
-		if (k == DEBUG_STACK - 1 && stack >= end - DEBUG_STKSZ) {
-			unsigned j = N_EXCEPTION_STACKS - 1;
-
-			/*
-			 * Black magic. A large debug stack is composed of
-			 * multiple exception stack entries, which we
-			 * iterate through now. Dont look:
-			 */
-			do {
-				++j;
-				end -= EXCEPTION_STKSZ;
-				ids[j][4] = '1' + (j - N_EXCEPTION_STACKS);
-			} while (stack < end - EXCEPTION_STKSZ);
-			if (*usedp & (1U << j))
-				break;
-			*usedp |= 1U << j;
-			*idp = ids[j];
-			return (unsigned long *)end;
-		}
-#endif
-	}
-	return NULL;
-}
-
-/*
- * x86-64 can have up to three kernel stacks:
- * process stack
- * interrupt stack
- * severe exception (double fault, nmi, stack fault, debug, mce) hardware stack
- */
-
-static inline int valid_stack_ptr(struct thread_info *tinfo,
-			void *p, unsigned int size, void *end)
-{
-	void *t = tinfo;
-	if (end) {
-		if (p < end && p >= (end-THREAD_SIZE))
-			return 1;
-		else
-			return 0;
-	}
-	return p > t && p < t + THREAD_SIZE - size;
-}
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
-	struct stack_frame *next_frame;
-	unsigned long return_address;
-};
-
-static inline unsigned long
-print_context_stack(struct thread_info *tinfo,
-		unsigned long *stack, unsigned long bp,
-		const struct stacktrace_ops *ops, void *data,
-		unsigned long *end)
-{
-	struct stack_frame *frame = (struct stack_frame *)bp;
-
-	while (valid_stack_ptr(tinfo, stack, sizeof(*stack), end)) {
-		unsigned long addr;
-
-		addr = *stack;
-		if (__kernel_text_address(addr)) {
-			if ((unsigned long) stack == bp + 8) {
-				ops->address(data, addr, 1);
-				frame = frame->next_frame;
-				bp = (unsigned long) frame;
-			} else {
-				ops->address(data, addr, bp == 0);
-			}
-		}
-		stack++;
-	}
-	return bp;
-}
-
-void dump_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp,
-		const struct stacktrace_ops *ops, void *data)
-{
-	const unsigned cpu = get_cpu();
-	unsigned long *irqstack_end = (unsigned long *)cpu_pda(cpu)->irqstackptr;
-	unsigned used = 0;
-	struct thread_info *tinfo;
-
-	if (!task)
-		task = current;
-
-	if (!stack) {
-		unsigned long dummy;
-		stack = &dummy;
-		if (task && task != current)
-			stack = (unsigned long *)task->thread.sp;
-	}
-
-#ifdef CONFIG_FRAME_POINTER
-	if (!bp) {
-		if (task == current) {
-			/* Grab bp right from our regs */
-			asm("movq %%rbp, %0" : "=r" (bp) : );
-		} else {
-			/* bp is the last reg pushed by switch_to */
-			bp = *(unsigned long *) task->thread.sp;
-		}
-	}
-#endif
-
-	/*
-	 * Print function call entries in all stacks, starting at the
-	 * current stack address. If the stacks consist of nested
-	 * exceptions
-	 */
-	tinfo = task_thread_info(task);
-	for (;;) {
-		char *id;
-		unsigned long *estack_end;
-		estack_end = in_exception_stack(cpu, (unsigned long)stack,
-						&used, &id);
-
-		if (estack_end) {
-			if (ops->stack(data, id) < 0)
-				break;
-
-			bp = print_context_stack(tinfo, stack, bp, ops,
-							data, estack_end);
-			ops->stack(data, "<EOE>");
-			/*
-			 * We link to the next stack via the
-			 * second-to-last pointer (index -2 to end) in the
-			 * exception stack:
-			 */
-			stack = (unsigned long *) estack_end[-2];
-			continue;
-		}
-		if (irqstack_end) {
-			unsigned long *irqstack;
-			irqstack = irqstack_end -
-				(IRQSTACKSIZE - 64) / sizeof(*irqstack);
-
-			if (stack >= irqstack && stack < irqstack_end) {
-				if (ops->stack(data, "IRQ") < 0)
-					break;
-				bp = print_context_stack(tinfo, stack, bp,
-						ops, data, irqstack_end);
-				/*
-				 * We link to the next stack (which would be
-				 * the process stack normally) the last
-				 * pointer (index -1 to end) in the IRQ stack:
-				 */
-				stack = (unsigned long *) (irqstack_end[-1]);
-				irqstack_end = NULL;
-				ops->stack(data, "EOI");
-				continue;
-			}
-		}
-		break;
-	}
-
-	/*
-	 * This handles the process stack:
-	 */
-	bp = print_context_stack(tinfo, stack, bp, ops, data, NULL);
-	put_cpu();
-}
-EXPORT_SYMBOL(dump_trace);
-
-static void
-print_trace_warning_symbol(void *data, char *msg, unsigned long symbol)
-{
-	print_symbol(msg, symbol);
-	printk("\n");
-}
-
-static void print_trace_warning(void *data, char *msg)
-{
-	printk("%s\n", msg);
-}
-
-static int print_trace_stack(void *data, char *name)
-{
-	printk(" <%s> ", name);
-	return 0;
-}
-
-static void print_trace_address(void *data, unsigned long addr, int reliable)
-{
-	touch_nmi_watchdog();
-	printk_address(addr, reliable);
-}
-
-static const struct stacktrace_ops print_trace_ops = {
-	.warning = print_trace_warning,
-	.warning_symbol = print_trace_warning_symbol,
-	.stack = print_trace_stack,
-	.address = print_trace_address,
-};
-
-static void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp, char *log_lvl)
-{
-	printk("Call Trace:\n");
-	dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
-}
-
-void show_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp)
-{
-	show_trace_log_lvl(task, regs, stack, bp, "");
-}
-
-static void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *sp, unsigned long bp, char *log_lvl)
-{
-	unsigned long *stack;
-	int i;
-	const int cpu = smp_processor_id();
-	unsigned long *irqstack_end =
-		(unsigned long *) (cpu_pda(cpu)->irqstackptr);
-	unsigned long *irqstack =
-		(unsigned long *) (cpu_pda(cpu)->irqstackptr - IRQSTACKSIZE);
-
-	/*
-	 * debugging aid: "show_stack(NULL, NULL);" prints the
-	 * back trace for this cpu.
-	 */
-
-	if (sp == NULL) {
-		if (task)
-			sp = (unsigned long *)task->thread.sp;
-		else
-			sp = (unsigned long *)&sp;
-	}
-
-	stack = sp;
-	for (i = 0; i < kstack_depth_to_print; i++) {
-		if (stack >= irqstack && stack <= irqstack_end) {
-			if (stack == irqstack_end) {
-				stack = (unsigned long *) (irqstack_end[-1]);
-				printk(" <EOI> ");
-			}
-		} else {
-		if (((long) stack & (THREAD_SIZE-1)) == 0)
-			break;
-		}
-		if (i && ((i % 4) == 0))
-			printk("\n");
-		printk(" %016lx", *stack++);
-		touch_nmi_watchdog();
-	}
-	printk("\n");
-	show_trace_log_lvl(task, regs, sp, bp, log_lvl);
-}
-
-void show_stack(struct task_struct *task, unsigned long *sp)
-{
-	show_stack_log_lvl(task, NULL, sp, 0, "");
-}
-
-/*
- * The architecture-independent dump_stack generator
- */
-void dump_stack(void)
-{
-	unsigned long bp = 0;
-	unsigned long stack;
-
-#ifdef CONFIG_FRAME_POINTER
-	if (!bp)
-		asm("movq %%rbp, %0" : "=r" (bp) : );
-#endif
-
-	printk("Pid: %d, comm: %.20s %s %s %.*s\n",
-		current->pid, current->comm, print_tainted(),
-		init_utsname()->release,
-		(int)strcspn(init_utsname()->version, " "),
-		init_utsname()->version);
-	show_trace(NULL, NULL, &stack, bp);
-}
-EXPORT_SYMBOL(dump_stack);
-
-void show_registers(struct pt_regs *regs)
-{
-	int i;
-	unsigned long sp;
-	const int cpu = smp_processor_id();
-	struct task_struct *cur = cpu_pda(cpu)->pcurrent;
-
-	sp = regs->sp;
-	printk("CPU %d ", cpu);
-	__show_regs(regs);
-	printk("Process %s (pid: %d, threadinfo %p, task %p)\n",
-		cur->comm, cur->pid, task_thread_info(cur), cur);
-
-	/*
-	 * When in-kernel, we also print out the stack and code at the
-	 * time of the fault..
-	 */
-	if (!user_mode(regs)) {
-		unsigned int code_prologue = code_bytes * 43 / 64;
-		unsigned int code_len = code_bytes;
-		unsigned char c;
-		u8 *ip;
-
-		printk("Stack: ");
-		show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
-				regs->bp, "");
-
-		printk(KERN_EMERG "Code: ");
-
-		ip = (u8 *)regs->ip - code_prologue;
-		if (ip < (u8 *)PAGE_OFFSET || probe_kernel_address(ip, c)) {
-			/* try starting at RIP */
-			ip = (u8 *)regs->ip;
-			code_len = code_len - code_prologue + 1;
-		}
-		for (i = 0; i < code_len; i++, ip++) {
-			if (ip < (u8 *)PAGE_OFFSET ||
-					probe_kernel_address(ip, c)) {
-				printk(" Bad RIP value.");
-				break;
-			}
-			if (ip == (u8 *)regs->ip)
-				printk("<%02x> ", c);
-			else
-				printk("%02x ", c);
-		}
-	}
-	printk("\n");
-}
-
-int is_valid_bugaddr(unsigned long ip)
-{
-	unsigned short ud2;
-
-	if (__copy_from_user(&ud2, (const void __user *) ip, sizeof(ud2)))
-		return 0;
-
-	return ud2 == 0x0b0f;
-}
-
-static raw_spinlock_t die_lock = __RAW_SPIN_LOCK_UNLOCKED;
-static int die_owner = -1;
-static unsigned int die_nest_count;
-
-unsigned __kprobes long oops_begin(void)
-{
-	int cpu;
-	unsigned long flags;
-
-	oops_enter();
-
-	/* racy, but better than risking deadlock. */
-	raw_local_irq_save(flags);
-	cpu = smp_processor_id();
-	if (!__raw_spin_trylock(&die_lock)) {
-		if (cpu == die_owner)
-			/* nested oops. should stop eventually */;
-		else
-			__raw_spin_lock(&die_lock);
-	}
-	die_nest_count++;
-	die_owner = cpu;
-	console_verbose();
-	bust_spinlocks(1);
-	return flags;
-}
-
-void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
-{
-	die_owner = -1;
-	bust_spinlocks(0);
-	die_nest_count--;
-	if (!die_nest_count)
-		/* Nest count reaches zero, release the lock. */
-		__raw_spin_unlock(&die_lock);
-	raw_local_irq_restore(flags);
-	if (!regs) {
-		oops_exit();
-		return;
-	}
-	if (panic_on_oops)
-		panic("Fatal exception");
-	oops_exit();
-	do_exit(signr);
-}
-
-int __kprobes __die(const char *str, struct pt_regs *regs, long err)
-{
-	printk(KERN_EMERG "%s: %04lx [%u] ", str, err & 0xffff, ++die_counter);
-#ifdef CONFIG_PREEMPT
-	printk("PREEMPT ");
-#endif
-#ifdef CONFIG_SMP
-	printk("SMP ");
-#endif
-#ifdef CONFIG_DEBUG_PAGEALLOC
-	printk("DEBUG_PAGEALLOC");
-#endif
-	printk("\n");
-	if (notify_die(DIE_OOPS, str, regs, err,
-			current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
-		return 1;
-
-	show_registers(regs);
-	add_taint(TAINT_DIE);
-	/* Executive summary in case the oops scrolled away */
-	printk(KERN_ALERT "RIP ");
-	printk_address(regs->ip, 1);
-	printk(" RSP <%016lx>\n", regs->sp);
-	if (kexec_should_crash(current))
-		crash_kexec(regs);
-	return 0;
-}
-
-void die(const char *str, struct pt_regs *regs, long err)
-{
-	unsigned long flags = oops_begin();
-
-	if (!user_mode(regs))
-		report_bug(regs->ip, regs);
-
-	if (__die(str, regs, err))
-		regs = NULL;
-	oops_end(flags, regs, SIGSEGV);
-}
-
-notrace __kprobes void
-die_nmi(char *str, struct pt_regs *regs, int do_panic)
-{
-	unsigned long flags;
-
-	if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
-		return;
-
-	flags = oops_begin();
-	/*
-	 * We are in trouble anyway, lets at least try
-	 * to get a message out.
-	 */
-	printk(KERN_EMERG "%s", str);
-	printk(" on CPU%d, ip %08lx, registers:\n",
-		smp_processor_id(), regs->ip);
-	show_registers(regs);
-	if (kexec_should_crash(current))
-		crash_kexec(regs);
-	if (do_panic || panic_on_oops)
-		panic("Non maskable interrupt");
-	oops_end(flags, NULL, SIGBUS);
-	nmi_exit();
-	local_irq_enable();
-	do_exit(SIGBUS);
-}
-
-static void __kprobes
-do_trap(int trapnr, int signr, char *str, struct pt_regs *regs,
-	long error_code, siginfo_t *info)
-{
-	struct task_struct *tsk = current;
-
-	if (!user_mode(regs))
-		goto kernel_trap;
-
-	/*
-	 * We want error_code and trap_no set for userspace faults and
-	 * kernelspace faults which result in die(), but not
-	 * kernelspace faults which are fixed up.  die() gives the
-	 * process no chance to handle the signal and notice the
-	 * kernel fault information, so that won't result in polluting
-	 * the information about previously queued, but not yet
-	 * delivered, faults.  See also do_general_protection below.
-	 */
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = trapnr;
-
-	if (show_unhandled_signals && unhandled_signal(tsk, signr) &&
-	    printk_ratelimit()) {
-		printk(KERN_INFO
-		       "%s[%d] trap %s ip:%lx sp:%lx error:%lx",
-		       tsk->comm, tsk->pid, str,
-		       regs->ip, regs->sp, error_code);
-		print_vma_addr(" in ", regs->ip);
-		printk("\n");
-	}
-
-	if (info)
-		force_sig_info(signr, info, tsk);
-	else
-		force_sig(signr, tsk);
-	return;
-
-kernel_trap:
-	if (!fixup_exception(regs)) {
-		tsk->thread.error_code = error_code;
-		tsk->thread.trap_no = trapnr;
-		die(str, regs, error_code);
-	}
-	return;
-}
-
-#define DO_ERROR(trapnr, signr, str, name) \
-asmlinkage void do_##name(struct pt_regs *regs, long error_code)	\
-{									\
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
-							== NOTIFY_STOP)	\
-		return;							\
-	conditional_sti(regs);						\
-	do_trap(trapnr, signr, str, regs, error_code, NULL);		\
-}
-
-#define DO_ERROR_INFO(trapnr, signr, str, name, sicode, siaddr)		\
-asmlinkage void do_##name(struct pt_regs *regs, long error_code)	\
-{									\
-	siginfo_t info;							\
-	info.si_signo = signr;						\
-	info.si_errno = 0;						\
-	info.si_code = sicode;						\
-	info.si_addr = (void __user *)siaddr;				\
-	trace_hardirqs_fixup();						\
-	if (notify_die(DIE_TRAP, str, regs, error_code, trapnr, signr)	\
-							== NOTIFY_STOP)	\
-		return;							\
-	conditional_sti(regs);						\
-	do_trap(trapnr, signr, str, regs, error_code, &info);		\
-}
-
-DO_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip)
-DO_ERROR(4, SIGSEGV, "overflow", overflow)
-DO_ERROR(5, SIGSEGV, "bounds", bounds)
-DO_ERROR_INFO(6, SIGILL, "invalid opcode", invalid_op, ILL_ILLOPN, regs->ip)
-DO_ERROR(9, SIGFPE, "coprocessor segment overrun", coprocessor_segment_overrun)
-DO_ERROR(10, SIGSEGV, "invalid TSS", invalid_TSS)
-DO_ERROR(11, SIGBUS, "segment not present", segment_not_present)
-DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
-
-/* Runs on IST stack */
-asmlinkage void do_stack_segment(struct pt_regs *regs, long error_code)
-{
-	if (notify_die(DIE_TRAP, "stack segment", regs, error_code,
-			12, SIGBUS) == NOTIFY_STOP)
-		return;
-	preempt_conditional_sti(regs);
-	do_trap(12, SIGBUS, "stack segment", regs, error_code, NULL);
-	preempt_conditional_cli(regs);
-}
-
-asmlinkage void do_double_fault(struct pt_regs *regs, long error_code)
-{
-	static const char str[] = "double fault";
-	struct task_struct *tsk = current;
-
-	/* Return not checked because double check cannot be ignored */
-	notify_die(DIE_TRAP, str, regs, error_code, 8, SIGSEGV);
-
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = 8;
-
-	/* This is always a kernel trap and never fixable (and thus must
-	   never return). */
-	for (;;)
-		die(str, regs, error_code);
-}
-
-asmlinkage void __kprobes
-do_general_protection(struct pt_regs *regs, long error_code)
-{
-	struct task_struct *tsk;
-
-	conditional_sti(regs);
-
-	tsk = current;
-	if (!user_mode(regs))
-		goto gp_in_kernel;
-
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = 13;
-
-	if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
-			printk_ratelimit()) {
-		printk(KERN_INFO
-			"%s[%d] general protection ip:%lx sp:%lx error:%lx",
-			tsk->comm, tsk->pid,
-			regs->ip, regs->sp, error_code);
-		print_vma_addr(" in ", regs->ip);
-		printk("\n");
-	}
-
-	force_sig(SIGSEGV, tsk);
-	return;
-
-gp_in_kernel:
-	if (fixup_exception(regs))
-		return;
-
-	tsk->thread.error_code = error_code;
-	tsk->thread.trap_no = 13;
-	if (notify_die(DIE_GPF, "general protection fault", regs,
-				error_code, 13, SIGSEGV) == NOTIFY_STOP)
-		return;
-	die("general protection fault", regs, error_code);
-}
-
-static notrace __kprobes void
-mem_parity_error(unsigned char reason, struct pt_regs *regs)
-{
-	printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
-		reason);
-	printk(KERN_EMERG "You have some hardware problem, likely on the PCI bus.\n");
-
-#if defined(CONFIG_EDAC)
-	if (edac_handler_set()) {
-		edac_atomic_assert_error();
-		return;
-	}
-#endif
-
-	if (panic_on_unrecovered_nmi)
-		panic("NMI: Not continuing");
-
-	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-
-	/* Clear and disable the memory parity error line. */
-	reason = (reason & 0xf) | 4;
-	outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-io_check_error(unsigned char reason, struct pt_regs *regs)
-{
-	printk("NMI: IOCK error (debug interrupt?)\n");
-	show_registers(regs);
-
-	/* Re-enable the IOCK line, wait for a few seconds */
-	reason = (reason & 0xf) | 8;
-	outb(reason, 0x61);
-	mdelay(2000);
-	reason &= ~8;
-	outb(reason, 0x61);
-}
-
-static notrace __kprobes void
-unknown_nmi_error(unsigned char reason, struct pt_regs *regs)
-{
-	if (notify_die(DIE_NMIUNKNOWN, "nmi", regs, reason, 2, SIGINT) ==
-			NOTIFY_STOP)
-		return;
-	printk(KERN_EMERG "Uhhuh. NMI received for unknown reason %02x.\n",
-		reason);
-	printk(KERN_EMERG "Do you have a strange power saving mode enabled?\n");
-
-	if (panic_on_unrecovered_nmi)
-		panic("NMI: Not continuing");
-
-	printk(KERN_EMERG "Dazed and confused, but trying to continue\n");
-}
-
-/* Runs on IST stack. This code must keep interrupts off all the time.
-   Nested NMIs are prevented by the CPU. */
-asmlinkage notrace __kprobes void default_do_nmi(struct pt_regs *regs)
-{
-	unsigned char reason = 0;
-	int cpu;
-
-	cpu = smp_processor_id();
-
-	/* Only the BSP gets external NMIs from the system. */
-	if (!cpu)
-		reason = get_nmi_reason();
-
-	if (!(reason & 0xc0)) {
-		if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
-								== NOTIFY_STOP)
-			return;
-		/*
-		 * Ok, so this is none of the documented NMI sources,
-		 * so it must be the NMI watchdog.
-		 */
-		if (nmi_watchdog_tick(regs, reason))
-			return;
-		if (!do_nmi_callback(regs, cpu))
-			unknown_nmi_error(reason, regs);
-
-		return;
-	}
-	if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP)
-		return;
-
-	/* AK: following checks seem to be broken on modern chipsets. FIXME */
-	if (reason & 0x80)
-		mem_parity_error(reason, regs);
-	if (reason & 0x40)
-		io_check_error(reason, regs);
-}
-
-asmlinkage notrace __kprobes void
-do_nmi(struct pt_regs *regs, long error_code)
-{
-	nmi_enter();
-
-	add_pda(__nmi_count, 1);
-
-	if (!ignore_nmis)
-		default_do_nmi(regs);
-
-	nmi_exit();
-}
-
-void stop_nmi(void)
-{
-	acpi_nmi_disable();
-	ignore_nmis++;
-}
-
-void restart_nmi(void)
-{
-	ignore_nmis--;
-	acpi_nmi_enable();
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_int3(struct pt_regs *regs, long error_code)
-{
-	trace_hardirqs_fixup();
-
-	if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
-			== NOTIFY_STOP)
-		return;
-
-	preempt_conditional_sti(regs);
-	do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
-	preempt_conditional_cli(regs);
-}
-
-/* Help handler running on IST stack to switch back to user stack
-   for scheduling or signal handling. The actual stack switch is done in
-   entry.S */
-asmlinkage __kprobes struct pt_regs *sync_regs(struct pt_regs *eregs)
-{
-	struct pt_regs *regs = eregs;
-	/* Did already sync */
-	if (eregs == (struct pt_regs *)eregs->sp)
-		;
-	/* Exception from user space */
-	else if (user_mode(eregs))
-		regs = task_pt_regs(current);
-	/* Exception from kernel and interrupts are enabled. Move to
-	   kernel process stack. */
-	else if (eregs->flags & X86_EFLAGS_IF)
-		regs = (struct pt_regs *)(eregs->sp -= sizeof(struct pt_regs));
-	if (eregs != regs)
-		*regs = *eregs;
-	return regs;
-}
-
-/* runs on IST stack. */
-asmlinkage void __kprobes do_debug(struct pt_regs *regs,
-				   unsigned long error_code)
-{
-	struct task_struct *tsk = current;
-	unsigned long condition;
-	siginfo_t info;
-
-	trace_hardirqs_fixup();
-
-	get_debugreg(condition, 6);
-
-	/*
-	 * The processor cleared BTF, so don't mark that we need it set.
-	 */
-	clear_tsk_thread_flag(tsk, TIF_DEBUGCTLMSR);
-	tsk->thread.debugctlmsr = 0;
-
-	if (notify_die(DIE_DEBUG, "debug", regs, condition, error_code,
-						SIGTRAP) == NOTIFY_STOP)
-		return;
-
-	preempt_conditional_sti(regs);
-
-	/* Mask out spurious debug traps due to lazy DR7 setting */
-	if (condition & (DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)) {
-		if (!tsk->thread.debugreg7)
-			goto clear_dr7;
-	}
-
-	tsk->thread.debugreg6 = condition;
-
-	/*
-	 * Single-stepping through TF: make sure we ignore any events in
-	 * kernel space (but re-enable TF when returning to user mode).
-	 */
-	if (condition & DR_STEP) {
-		if (!user_mode(regs))
-			goto clear_TF_reenable;
-	}
-
-	/* Ok, finally something we can handle */
-	tsk->thread.trap_no = 1;
-	tsk->thread.error_code = error_code;
-	info.si_signo = SIGTRAP;
-	info.si_errno = 0;
-	info.si_code = get_si_code(condition);
-	info.si_addr = user_mode(regs) ? (void __user *)regs->ip : NULL;
-	force_sig_info(SIGTRAP, &info, tsk);
-
-clear_dr7:
-	set_debugreg(0, 7);
-	preempt_conditional_cli(regs);
-	return;
-
-clear_TF_reenable:
-	set_tsk_thread_flag(tsk, TIF_SINGLESTEP);
-	regs->flags &= ~X86_EFLAGS_TF;
-	preempt_conditional_cli(regs);
-	return;
-}
-
-static int kernel_math_error(struct pt_regs *regs, const char *str, int trapnr)
-{
-	if (fixup_exception(regs))
-		return 1;
-
-	notify_die(DIE_GPF, str, regs, 0, trapnr, SIGFPE);
-	/* Illegal floating point operation in the kernel */
-	current->thread.trap_no = trapnr;
-	die(str, regs, 0);
-	return 0;
-}
-
-/*
- * Note that we play around with the 'TS' bit in an attempt to get
- * the correct behaviour even in the presence of the asynchronous
- * IRQ13 behaviour
- */
-asmlinkage void do_coprocessor_error(struct pt_regs *regs)
-{
-	void __user *ip = (void __user *)(regs->ip);
-	struct task_struct *task;
-	siginfo_t info;
-	unsigned short cwd, swd;
-
-	conditional_sti(regs);
-	if (!user_mode(regs) &&
-	    kernel_math_error(regs, "kernel x87 math error", 16))
-		return;
-
-	/*
-	 * Save the info for the exception handler and clear the error.
-	 */
-	task = current;
-	save_init_fpu(task);
-	task->thread.trap_no = 16;
-	task->thread.error_code = 0;
-	info.si_signo = SIGFPE;
-	info.si_errno = 0;
-	info.si_code = __SI_FAULT;
-	info.si_addr = ip;
-	/*
-	 * (~cwd & swd) will mask out exceptions that are not set to unmasked
-	 * status.  0x3f is the exception bits in these regs, 0x200 is the
-	 * C1 reg you need in case of a stack fault, 0x040 is the stack
-	 * fault bit.  We should only be taking one exception at a time,
-	 * so if this combination doesn't produce any single exception,
-	 * then we have a bad program that isn't synchronizing its FPU usage
-	 * and it will suffer the consequences since we won't be able to
-	 * fully reproduce the context of the exception
-	 */
-	cwd = get_fpu_cwd(task);
-	swd = get_fpu_swd(task);
-	switch (swd & ~cwd & 0x3f) {
-	case 0x000: /* No unmasked exception */
-	default: /* Multiple exceptions */
-		break;
-	case 0x001: /* Invalid Op */
-		/*
-		 * swd & 0x240 == 0x040: Stack Underflow
-		 * swd & 0x240 == 0x240: Stack Overflow
-		 * User must clear the SF bit (0x40) if set
-		 */
-		info.si_code = FPE_FLTINV;
-		break;
-	case 0x002: /* Denormalize */
-	case 0x010: /* Underflow */
-		info.si_code = FPE_FLTUND;
-		break;
-	case 0x004: /* Zero Divide */
-		info.si_code = FPE_FLTDIV;
-		break;
-	case 0x008: /* Overflow */
-		info.si_code = FPE_FLTOVF;
-		break;
-	case 0x020: /* Precision */
-		info.si_code = FPE_FLTRES;
-		break;
-	}
-	force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void bad_intr(void)
-{
-	printk("bad interrupt");
-}
-
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *regs)
-{
-	void __user *ip = (void __user *)(regs->ip);
-	struct task_struct *task;
-	siginfo_t info;
-	unsigned short mxcsr;
-
-	conditional_sti(regs);
-	if (!user_mode(regs) &&
-			kernel_math_error(regs, "kernel simd math error", 19))
-		return;
-
-	/*
-	 * Save the info for the exception handler and clear the error.
-	 */
-	task = current;
-	save_init_fpu(task);
-	task->thread.trap_no = 19;
-	task->thread.error_code = 0;
-	info.si_signo = SIGFPE;
-	info.si_errno = 0;
-	info.si_code = __SI_FAULT;
-	info.si_addr = ip;
-	/*
-	 * The SIMD FPU exceptions are handled a little differently, as there
-	 * is only a single status/control register.  Thus, to determine which
-	 * unmasked exception was caught we must mask the exception mask bits
-	 * at 0x1f80, and then use these to mask the exception bits at 0x3f.
-	 */
-	mxcsr = get_fpu_mxcsr(task);
-	switch (~((mxcsr & 0x1f80) >> 7) & (mxcsr & 0x3f)) {
-	case 0x000:
-	default:
-		break;
-	case 0x001: /* Invalid Op */
-		info.si_code = FPE_FLTINV;
-		break;
-	case 0x002: /* Denormalize */
-	case 0x010: /* Underflow */
-		info.si_code = FPE_FLTUND;
-		break;
-	case 0x004: /* Zero Divide */
-		info.si_code = FPE_FLTDIV;
-		break;
-	case 0x008: /* Overflow */
-		info.si_code = FPE_FLTOVF;
-		break;
-	case 0x020: /* Precision */
-		info.si_code = FPE_FLTRES;
-		break;
-	}
-	force_sig_info(SIGFPE, &info, task);
-}
-
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *regs)
-{
-}
-
-asmlinkage void __attribute__((weak)) smp_thermal_interrupt(void)
-{
-}
-
-asmlinkage void __attribute__((weak)) mce_threshold_interrupt(void)
-{
-}
-
-/*
- * 'math_state_restore()' saves the current math information in the
- * old math state array, and gets the new ones from the current task
- *
- * Careful.. There are problems with IBM-designed IRQ13 behaviour.
- * Don't touch unless you *really* know how it works.
- */
-asmlinkage void math_state_restore(void)
-{
-	struct task_struct *me = current;
-
-	if (!used_math()) {
-		local_irq_enable();
-		/*
-		 * does a slab alloc which can sleep
-		 */
-		if (init_fpu(me)) {
-			/*
-			 * ran out of memory!
-			 */
-			do_group_exit(SIGKILL);
-			return;
-		}
-		local_irq_disable();
-	}
-
-	clts();				/* Allow maths ops (or we recurse) */
-	/*
-	 * Paranoid restore. send a SIGSEGV if we fail to restore the state.
-	 */
-	if (unlikely(restore_fpu_checking(me))) {
-		stts();
-		force_sig(SIGSEGV, me);
-		return;
-	}
-	task_thread_info(me)->status |= TS_USEDFPU;
-	me->fpu_counter++;
-}
-EXPORT_SYMBOL_GPL(math_state_restore);
-
-void __init trap_init(void)
-{
-	set_intr_gate(0, &divide_error);
-	set_intr_gate_ist(1, &debug, DEBUG_STACK);
-	set_intr_gate_ist(2, &nmi, NMI_STACK);
-	/* int3 can be called from all */
-	set_system_gate_ist(3, &int3, DEBUG_STACK);
-	/* int4 can be called from all */
-	set_system_gate(4, &overflow);
-	set_intr_gate(5, &bounds);
-	set_intr_gate(6, &invalid_op);
-	set_intr_gate(7, &device_not_available);
-	set_intr_gate_ist(8, &double_fault, DOUBLEFAULT_STACK);
-	set_intr_gate(9, &coprocessor_segment_overrun);
-	set_intr_gate(10, &invalid_TSS);
-	set_intr_gate(11, &segment_not_present);
-	set_intr_gate_ist(12, &stack_segment, STACKFAULT_STACK);
-	set_intr_gate(13, &general_protection);
-	set_intr_gate(14, &page_fault);
-	set_intr_gate(15, &spurious_interrupt_bug);
-	set_intr_gate(16, &coprocessor_error);
-	set_intr_gate(17, &alignment_check);
-#ifdef CONFIG_X86_MCE
-	set_intr_gate_ist(18, &machine_check, MCE_STACK);
-#endif
-	set_intr_gate(19, &simd_coprocessor_error);
-
-#ifdef CONFIG_IA32_EMULATION
-	set_system_gate(IA32_SYSCALL_VECTOR, ia32_syscall);
-#endif
-	/*
-	 * Should be a barrier for any external CPU state:
-	 */
-	cpu_init();
-}
-
-static int __init oops_setup(char *s)
-{
-	if (!s)
-		return -EINVAL;
-	if (!strcmp(s, "panic"))
-		panic_on_oops = 1;
-	return 0;
-}
-early_param("oops", oops_setup);
-
-static int __init kstack_setup(char *s)
-{
-	if (!s)
-		return -EINVAL;
-	kstack_depth_to_print = simple_strtoul(s, NULL, 0);
-	return 0;
-}
-early_param("kstack", kstack_setup);
-
-static int __init code_bytes_setup(char *s)
-{
-	code_bytes = simple_strtoul(s, NULL, 0);
-	if (code_bytes > 8192)
-		code_bytes = 8192;
-
-	return 1;
-}
-__setup("code_bytes=", code_bytes_setup);
diff --git a/arch/x86/mach-generic/es7000.c b/arch/x86/mach-generic/es7000.c
index 520cca0..6513d41 100644
--- a/arch/x86/mach-generic/es7000.c
+++ b/arch/x86/mach-generic/es7000.c
@@ -47,16 +47,26 @@
 /* Hook from generic ACPI tables.c */
 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
-	unsigned long oem_addr;
+	unsigned long oem_addr = 0;
+	int check_dsdt;
+	int ret = 0;
+
+	/* check dsdt at first to avoid clear fix_map for oem_addr */
+	check_dsdt = es7000_check_dsdt();
+
 	if (!find_unisys_acpi_oem_table(&oem_addr)) {
-		if (es7000_check_dsdt())
-			return parse_unisys_oem((char *)oem_addr);
+		if (check_dsdt)
+			ret = parse_unisys_oem((char *)oem_addr);
 		else {
 			setup_unisys();
-			return 1;
+			ret = 1;
 		}
+		/*
+		 * we need to unmap it
+		 */
+		unmap_unisys_acpi_oem_table(oem_addr);
 	}
-	return 0;
+	return ret;
 }
 #else
 static int __init acpi_madt_oem_check(char *oem_id, char *oem_table_id)
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index dfb932d..59f89b4 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -13,12 +13,8 @@
 mmiotrace-y			:= pf_in.o mmio-mod.o
 obj-$(CONFIG_MMIOTRACE_TEST)	+= testmmiotrace.o
 
-ifeq ($(CONFIG_X86_32),y)
-obj-$(CONFIG_NUMA)		+= discontig_32.o
-else
-obj-$(CONFIG_NUMA)		+= numa_64.o
+obj-$(CONFIG_NUMA)		+= numa_$(BITS).o
 obj-$(CONFIG_K8_NUMA)		+= k8topology_64.o
-endif
 obj-$(CONFIG_ACPI_NUMA)		+= srat_$(BITS).o
 
 obj-$(CONFIG_MEMTEST)		+= memtest.o
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index a742d75..3f2b896 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -592,11 +592,6 @@
 	unsigned long flags;
 #endif
 
-	/*
-	 * We can fault from pretty much anywhere, with unknown IRQ state.
-	 */
-	trace_hardirqs_fixup();
-
 	tsk = current;
 	mm = tsk->mm;
 	prefetchw(&mm->mmap_sem);
diff --git a/arch/x86/mm/gup.c b/arch/x86/mm/gup.c
index 007bb06..4ba373c 100644
--- a/arch/x86/mm/gup.c
+++ b/arch/x86/mm/gup.c
@@ -82,7 +82,7 @@
 		pte_t pte = gup_get_pte(ptep);
 		struct page *page;
 
-		if ((pte_val(pte) & (mask | _PAGE_SPECIAL)) != mask) {
+		if ((pte_flags(pte) & (mask | _PAGE_SPECIAL)) != mask) {
 			pte_unmap(ptep);
 			return 0;
 		}
@@ -116,10 +116,10 @@
 	mask = _PAGE_PRESENT|_PAGE_USER;
 	if (write)
 		mask |= _PAGE_RW;
-	if ((pte_val(pte) & mask) != mask)
+	if ((pte_flags(pte) & mask) != mask)
 		return 0;
 	/* hugepages are never "special" */
-	VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+	VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
 	VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
 
 	refs = 0;
@@ -173,10 +173,10 @@
 	mask = _PAGE_PRESENT|_PAGE_USER;
 	if (write)
 		mask |= _PAGE_RW;
-	if ((pte_val(pte) & mask) != mask)
+	if ((pte_flags(pte) & mask) != mask)
 		return 0;
 	/* hugepages are never "special" */
-	VM_BUG_ON(pte_val(pte) & _PAGE_SPECIAL);
+	VM_BUG_ON(pte_flags(pte) & _PAGE_SPECIAL);
 	VM_BUG_ON(!pfn_valid(pte_pfn(pte)));
 
 	refs = 0;
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index bbe044d..8396868 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -558,7 +558,7 @@
 
 int nx_enabled;
 
-pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL);
+pteval_t __supported_pte_mask __read_mostly = ~(_PAGE_NX | _PAGE_GLOBAL | _PAGE_IOMAP);
 EXPORT_SYMBOL_GPL(__supported_pte_mask);
 
 #ifdef CONFIG_X86_PAE
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 3e10054..b8e461d 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -89,7 +89,7 @@
 
 int after_bootmem;
 
-unsigned long __supported_pte_mask __read_mostly = ~0UL;
+pteval_t __supported_pte_mask __read_mostly = ~_PAGE_IOMAP;
 EXPORT_SYMBOL_GPL(__supported_pte_mask);
 
 static int do_not_nx __cpuinitdata;
@@ -196,9 +196,6 @@
 	}
 
 	pte = pte_offset_kernel(pmd, vaddr);
-	if (!pte_none(*pte) && pte_val(new_pte) &&
-	    pte_val(*pte) != (pte_val(new_pte) & __supported_pte_mask))
-		pte_ERROR(*pte);
 	set_pte(pte, new_pte);
 
 	/*
@@ -313,7 +310,7 @@
 	if (pfn >= table_top)
 		panic("alloc_low_page: ran out of memory");
 
-	adr = early_ioremap(pfn * PAGE_SIZE, PAGE_SIZE);
+	adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
 	memset(adr, 0, PAGE_SIZE);
 	*phys  = pfn * PAGE_SIZE;
 	return adr;
@@ -749,7 +746,7 @@
 		old_start = mr[i].start;
 		memmove(&mr[i], &mr[i+1],
 			 (nr_range - 1 - i) * sizeof (struct map_range));
-		mr[i].start = old_start;
+		mr[i--].start = old_start;
 		nr_range--;
 	}
 
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 8cbeda1..e4c43ec 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -45,6 +45,27 @@
 }
 EXPORT_SYMBOL(__phys_addr);
 
+bool __virt_addr_valid(unsigned long x)
+{
+	if (x >= __START_KERNEL_map) {
+		x -= __START_KERNEL_map;
+		if (x >= KERNEL_IMAGE_SIZE)
+			return false;
+		x += phys_base;
+	} else {
+		if (x < PAGE_OFFSET)
+			return false;
+		x -= PAGE_OFFSET;
+		if (system_state == SYSTEM_BOOTING ?
+				x > MAXMEM : !phys_addr_valid(x)) {
+			return false;
+		}
+	}
+
+	return pfn_valid(x >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(__virt_addr_valid);
+
 #else
 
 static inline int phys_addr_valid(unsigned long addr)
@@ -56,13 +77,24 @@
 unsigned long __phys_addr(unsigned long x)
 {
 	/* VMALLOC_* aren't constants; not available at the boot time */
-	VIRTUAL_BUG_ON(x < PAGE_OFFSET || (system_state != SYSTEM_BOOTING &&
-					is_vmalloc_addr((void *)x)));
+	VIRTUAL_BUG_ON(x < PAGE_OFFSET);
+	VIRTUAL_BUG_ON(system_state != SYSTEM_BOOTING &&
+		is_vmalloc_addr((void *) x));
 	return x - PAGE_OFFSET;
 }
 EXPORT_SYMBOL(__phys_addr);
 #endif
 
+bool __virt_addr_valid(unsigned long x)
+{
+	if (x < PAGE_OFFSET)
+		return false;
+	if (system_state != SYSTEM_BOOTING && is_vmalloc_addr((void *) x))
+		return false;
+	return pfn_valid((x - PAGE_OFFSET) >> PAGE_SHIFT);
+}
+EXPORT_SYMBOL(__virt_addr_valid);
+
 #endif
 
 int page_is_ram(unsigned long pagenr)
@@ -242,16 +274,16 @@
 	switch (prot_val) {
 	case _PAGE_CACHE_UC:
 	default:
-		prot = PAGE_KERNEL_NOCACHE;
+		prot = PAGE_KERNEL_IO_NOCACHE;
 		break;
 	case _PAGE_CACHE_UC_MINUS:
-		prot = PAGE_KERNEL_UC_MINUS;
+		prot = PAGE_KERNEL_IO_UC_MINUS;
 		break;
 	case _PAGE_CACHE_WC:
-		prot = PAGE_KERNEL_WC;
+		prot = PAGE_KERNEL_IO_WC;
 		break;
 	case _PAGE_CACHE_WB:
-		prot = PAGE_KERNEL;
+		prot = PAGE_KERNEL_IO;
 		break;
 	}
 
@@ -568,12 +600,12 @@
 }
 
 static inline void __init early_set_fixmap(enum fixed_addresses idx,
-					unsigned long phys)
+					   unsigned long phys, pgprot_t prot)
 {
 	if (after_paging_init)
-		set_fixmap(idx, phys);
+		__set_fixmap(idx, phys, prot);
 	else
-		__early_set_fixmap(idx, phys, PAGE_KERNEL);
+		__early_set_fixmap(idx, phys, prot);
 }
 
 static inline void __init early_clear_fixmap(enum fixed_addresses idx)
@@ -584,16 +616,22 @@
 		__early_set_fixmap(idx, 0, __pgprot(0));
 }
 
-
-static int __initdata early_ioremap_nested;
-
+static void *prev_map[FIX_BTMAPS_SLOTS] __initdata;
+static unsigned long prev_size[FIX_BTMAPS_SLOTS] __initdata;
 static int __init check_early_ioremap_leak(void)
 {
-	if (!early_ioremap_nested)
+	int count = 0;
+	int i;
+
+	for (i = 0; i < FIX_BTMAPS_SLOTS; i++)
+		if (prev_map[i])
+			count++;
+
+	if (!count)
 		return 0;
 	WARN(1, KERN_WARNING
 	       "Debug warning: early ioremap leak of %d areas detected.\n",
-		early_ioremap_nested);
+		count);
 	printk(KERN_WARNING
 		"please boot with early_ioremap_debug and report the dmesg.\n");
 
@@ -601,18 +639,33 @@
 }
 late_initcall(check_early_ioremap_leak);
 
-void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+static void __init *__early_ioremap(unsigned long phys_addr, unsigned long size, pgprot_t prot)
 {
 	unsigned long offset, last_addr;
-	unsigned int nrpages, nesting;
+	unsigned int nrpages;
 	enum fixed_addresses idx0, idx;
+	int i, slot;
 
 	WARN_ON(system_state != SYSTEM_BOOTING);
 
-	nesting = early_ioremap_nested;
+	slot = -1;
+	for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+		if (!prev_map[i]) {
+			slot = i;
+			break;
+		}
+	}
+
+	if (slot < 0) {
+		printk(KERN_INFO "early_iomap(%08lx, %08lx) not found slot\n",
+			 phys_addr, size);
+		WARN_ON(1);
+		return NULL;
+	}
+
 	if (early_ioremap_debug) {
 		printk(KERN_INFO "early_ioremap(%08lx, %08lx) [%d] => ",
-		       phys_addr, size, nesting);
+		       phys_addr, size, slot);
 		dump_stack();
 	}
 
@@ -623,11 +676,7 @@
 		return NULL;
 	}
 
-	if (nesting >= FIX_BTMAPS_NESTING) {
-		WARN_ON(1);
-		return NULL;
-	}
-	early_ioremap_nested++;
+	prev_size[slot] = size;
 	/*
 	 * Mappings have to be page-aligned
 	 */
@@ -647,10 +696,10 @@
 	/*
 	 * Ok, go for it..
 	 */
-	idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+	idx0 = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
 	idx = idx0;
 	while (nrpages > 0) {
-		early_set_fixmap(idx, phys_addr);
+		early_set_fixmap(idx, phys_addr, prot);
 		phys_addr += PAGE_SIZE;
 		--idx;
 		--nrpages;
@@ -658,7 +707,20 @@
 	if (early_ioremap_debug)
 		printk(KERN_CONT "%08lx + %08lx\n", offset, fix_to_virt(idx0));
 
-	return (void *) (offset + fix_to_virt(idx0));
+	prev_map[slot] = (void *) (offset + fix_to_virt(idx0));
+	return prev_map[slot];
+}
+
+/* Remap an IO device */
+void __init *early_ioremap(unsigned long phys_addr, unsigned long size)
+{
+	return __early_ioremap(phys_addr, size, PAGE_KERNEL_IO);
+}
+
+/* Remap memory */
+void __init *early_memremap(unsigned long phys_addr, unsigned long size)
+{
+	return __early_ioremap(phys_addr, size, PAGE_KERNEL);
 }
 
 void __init early_iounmap(void *addr, unsigned long size)
@@ -667,15 +729,33 @@
 	unsigned long offset;
 	unsigned int nrpages;
 	enum fixed_addresses idx;
-	int nesting;
+	int i, slot;
 
-	nesting = --early_ioremap_nested;
-	if (WARN_ON(nesting < 0))
+	slot = -1;
+	for (i = 0; i < FIX_BTMAPS_SLOTS; i++) {
+		if (prev_map[i] == addr) {
+			slot = i;
+			break;
+		}
+	}
+
+	if (slot < 0) {
+		printk(KERN_INFO "early_iounmap(%p, %08lx) not found slot\n",
+			 addr, size);
+		WARN_ON(1);
 		return;
+	}
+
+	if (prev_size[slot] != size) {
+		printk(KERN_INFO "early_iounmap(%p, %08lx) [%d] size not consistent %08lx\n",
+			 addr, size, slot, prev_size[slot]);
+		WARN_ON(1);
+		return;
+	}
 
 	if (early_ioremap_debug) {
 		printk(KERN_INFO "early_iounmap(%p, %08lx) [%d]\n", addr,
-		       size, nesting);
+		       size, slot);
 		dump_stack();
 	}
 
@@ -687,12 +767,13 @@
 	offset = virt_addr & ~PAGE_MASK;
 	nrpages = PAGE_ALIGN(offset + size - 1) >> PAGE_SHIFT;
 
-	idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*nesting;
+	idx = FIX_BTMAP_BEGIN - NR_FIX_BTMAPS*slot;
 	while (nrpages > 0) {
 		early_clear_fixmap(idx);
 		--idx;
 		--nrpages;
 	}
+	prev_map[slot] = 0;
 }
 
 void __this_fixmap_does_not_exist(void)
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/numa_32.c
similarity index 100%
rename from arch/x86/mm/discontig_32.c
rename to arch/x86/mm/numa_32.c
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 1b4763e..51c0a2f 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -138,7 +138,7 @@
 		return;
 	}
 
-	if (is_uv_system())
+	if (get_uv_system_type() >= UV_X2APIC)
 		apic_id = (pa->apic_id << 8) | pa->local_sapic_eid;
 	else
 		apic_id = pa->apic_id;
diff --git a/arch/x86/oprofile/Makefile b/arch/x86/oprofile/Makefile
index 30f3eb3..446902b 100644
--- a/arch/x86/oprofile/Makefile
+++ b/arch/x86/oprofile/Makefile
@@ -7,6 +7,6 @@
 		timer_int.o )
 
 oprofile-y				:= $(DRIVER_OBJS) init.o backtrace.o
-oprofile-$(CONFIG_X86_LOCAL_APIC) 	+= nmi_int.o op_model_athlon.o \
+oprofile-$(CONFIG_X86_LOCAL_APIC) 	+= nmi_int.o op_model_amd.o \
 					   op_model_ppro.o op_model_p4.o
 oprofile-$(CONFIG_X86_IO_APIC)		+= nmi_timer_int.o
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 8a5f161..57f6c90 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -1,10 +1,11 @@
 /**
  * @file nmi_int.c
  *
- * @remark Copyright 2002 OProfile authors
+ * @remark Copyright 2002-2008 OProfile authors
  * @remark Read the file COPYING
  *
  * @author John Levon <levon@movementarian.org>
+ * @author Robert Richter <robert.richter@amd.com>
  */
 
 #include <linux/init.h>
@@ -439,6 +440,7 @@
 	__u8 vendor = boot_cpu_data.x86_vendor;
 	__u8 family = boot_cpu_data.x86;
 	char *cpu_type;
+	int ret = 0;
 
 	if (!cpu_has_apic)
 		return -ENODEV;
@@ -451,19 +453,23 @@
 		default:
 			return -ENODEV;
 		case 6:
-			model = &op_athlon_spec;
+			model = &op_amd_spec;
 			cpu_type = "i386/athlon";
 			break;
 		case 0xf:
-			model = &op_athlon_spec;
+			model = &op_amd_spec;
 			/* Actually it could be i386/hammer too, but give
 			 user space an consistent name. */
 			cpu_type = "x86-64/hammer";
 			break;
 		case 0x10:
-			model = &op_athlon_spec;
+			model = &op_amd_spec;
 			cpu_type = "x86-64/family10";
 			break;
+		case 0x11:
+			model = &op_amd_spec;
+			cpu_type = "x86-64/family11h";
+			break;
 		}
 		break;
 
@@ -490,17 +496,24 @@
 		return -ENODEV;
 	}
 
-	init_sysfs();
 #ifdef CONFIG_SMP
 	register_cpu_notifier(&oprofile_cpu_nb);
 #endif
-	using_nmi = 1;
+	/* default values, can be overwritten by model */
 	ops->create_files = nmi_create_files;
 	ops->setup = nmi_setup;
 	ops->shutdown = nmi_shutdown;
 	ops->start = nmi_start;
 	ops->stop = nmi_stop;
 	ops->cpu_type = cpu_type;
+
+	if (model->init)
+		ret = model->init(ops);
+	if (ret)
+		return ret;
+
+	init_sysfs();
+	using_nmi = 1;
 	printk(KERN_INFO "oprofile: using NMI interrupt.\n");
 	return 0;
 }
@@ -513,4 +526,6 @@
 		unregister_cpu_notifier(&oprofile_cpu_nb);
 #endif
 	}
+	if (model->exit)
+		model->exit();
 }
diff --git a/arch/x86/oprofile/op_model_amd.c b/arch/x86/oprofile/op_model_amd.c
new file mode 100644
index 0000000..d9faf60
--- /dev/null
+++ b/arch/x86/oprofile/op_model_amd.c
@@ -0,0 +1,543 @@
+/*
+ * @file op_model_amd.c
+ * athlon / K7 / K8 / Family 10h model-specific MSR operations
+ *
+ * @remark Copyright 2002-2008 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author John Levon
+ * @author Philippe Elie
+ * @author Graydon Hoare
+ * @author Robert Richter <robert.richter@amd.com>
+ * @author Barry Kasindorf
+*/
+
+#include <linux/oprofile.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+
+#include <asm/ptrace.h>
+#include <asm/msr.h>
+#include <asm/nmi.h>
+
+#include "op_x86_model.h"
+#include "op_counter.h"
+
+#define NUM_COUNTERS 4
+#define NUM_CONTROLS 4
+
+#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
+#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)
+#define CTR_WRITE(l, msrs, c) do {wrmsr(msrs->counters[(c)].addr, -(unsigned int)(l), -1); } while (0)
+#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
+
+#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
+#define CTRL_READ(l, h, msrs, c) do {rdmsr(msrs->controls[(c)].addr, (l), (h)); } while (0)
+#define CTRL_WRITE(l, h, msrs, c) do {wrmsr(msrs->controls[(c)].addr, (l), (h)); } while (0)
+#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
+#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
+#define CTRL_CLEAR_LO(x) (x &= (1<<21))
+#define CTRL_CLEAR_HI(x) (x &= 0xfffffcf0)
+#define CTRL_SET_ENABLE(val) (val |= 1<<20)
+#define CTRL_SET_USR(val, u) (val |= ((u & 1) << 16))
+#define CTRL_SET_KERN(val, k) (val |= ((k & 1) << 17))
+#define CTRL_SET_UM(val, m) (val |= (m << 8))
+#define CTRL_SET_EVENT_LOW(val, e) (val |= (e & 0xff))
+#define CTRL_SET_EVENT_HIGH(val, e) (val |= ((e >> 8) & 0xf))
+#define CTRL_SET_HOST_ONLY(val, h) (val |= ((h & 1) << 9))
+#define CTRL_SET_GUEST_ONLY(val, h) (val |= ((h & 1) << 8))
+
+static unsigned long reset_value[NUM_COUNTERS];
+
+#ifdef CONFIG_OPROFILE_IBS
+
+/* IbsFetchCtl bits/masks */
+#define IBS_FETCH_HIGH_VALID_BIT	(1UL << 17)	/* bit 49 */
+#define IBS_FETCH_HIGH_ENABLE		(1UL << 16)	/* bit 48 */
+#define IBS_FETCH_LOW_MAX_CNT_MASK	0x0000FFFFUL	/* MaxCnt mask */
+
+/*IbsOpCtl bits */
+#define IBS_OP_LOW_VALID_BIT		(1ULL<<18)	/* bit 18 */
+#define IBS_OP_LOW_ENABLE		(1ULL<<17)	/* bit 17 */
+
+/* Codes used in cpu_buffer.c */
+/* This produces duplicate code, need to be fixed */
+#define IBS_FETCH_BEGIN 3
+#define IBS_OP_BEGIN    4
+
+/* The function interface needs to be fixed, something like add
+   data. Should then be added to linux/oprofile.h. */
+extern void oprofile_add_ibs_sample(struct pt_regs *const regs,
+				    unsigned int * const ibs_sample, u8 code);
+
+struct ibs_fetch_sample {
+	/* MSRC001_1031 IBS Fetch Linear Address Register */
+	unsigned int ibs_fetch_lin_addr_low;
+	unsigned int ibs_fetch_lin_addr_high;
+	/* MSRC001_1030 IBS Fetch Control Register */
+	unsigned int ibs_fetch_ctl_low;
+	unsigned int ibs_fetch_ctl_high;
+	/* MSRC001_1032 IBS Fetch Physical Address Register */
+	unsigned int ibs_fetch_phys_addr_low;
+	unsigned int ibs_fetch_phys_addr_high;
+};
+
+struct ibs_op_sample {
+	/* MSRC001_1034 IBS Op Logical Address Register (IbsRIP) */
+	unsigned int ibs_op_rip_low;
+	unsigned int ibs_op_rip_high;
+	/* MSRC001_1035 IBS Op Data Register */
+	unsigned int ibs_op_data1_low;
+	unsigned int ibs_op_data1_high;
+	/* MSRC001_1036 IBS Op Data 2 Register */
+	unsigned int ibs_op_data2_low;
+	unsigned int ibs_op_data2_high;
+	/* MSRC001_1037 IBS Op Data 3 Register */
+	unsigned int ibs_op_data3_low;
+	unsigned int ibs_op_data3_high;
+	/* MSRC001_1038 IBS DC Linear Address Register (IbsDcLinAd) */
+	unsigned int ibs_dc_linear_low;
+	unsigned int ibs_dc_linear_high;
+	/* MSRC001_1039 IBS DC Physical Address Register (IbsDcPhysAd) */
+	unsigned int ibs_dc_phys_low;
+	unsigned int ibs_dc_phys_high;
+};
+
+/*
+ * unitialize the APIC for the IBS interrupts if needed on AMD Family10h+
+*/
+static void clear_ibs_nmi(void);
+
+static int ibs_allowed;	/* AMD Family10h and later */
+
+struct op_ibs_config {
+	unsigned long op_enabled;
+	unsigned long fetch_enabled;
+	unsigned long max_cnt_fetch;
+	unsigned long max_cnt_op;
+	unsigned long rand_en;
+	unsigned long dispatched_ops;
+};
+
+static struct op_ibs_config ibs_config;
+
+#endif
+
+/* functions for op_amd_spec */
+
+static void op_amd_fill_in_addresses(struct op_msrs * const msrs)
+{
+	int i;
+
+	for (i = 0; i < NUM_COUNTERS; i++) {
+		if (reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i))
+			msrs->counters[i].addr = MSR_K7_PERFCTR0 + i;
+		else
+			msrs->counters[i].addr = 0;
+	}
+
+	for (i = 0; i < NUM_CONTROLS; i++) {
+		if (reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + i))
+			msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i;
+		else
+			msrs->controls[i].addr = 0;
+	}
+}
+
+
+static void op_amd_setup_ctrs(struct op_msrs const * const msrs)
+{
+	unsigned int low, high;
+	int i;
+
+	/* clear all counters */
+	for (i = 0 ; i < NUM_CONTROLS; ++i) {
+		if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
+			continue;
+		CTRL_READ(low, high, msrs, i);
+		CTRL_CLEAR_LO(low);
+		CTRL_CLEAR_HI(high);
+		CTRL_WRITE(low, high, msrs, i);
+	}
+
+	/* avoid a false detection of ctr overflows in NMI handler */
+	for (i = 0; i < NUM_COUNTERS; ++i) {
+		if (unlikely(!CTR_IS_RESERVED(msrs, i)))
+			continue;
+		CTR_WRITE(1, msrs, i);
+	}
+
+	/* enable active counters */
+	for (i = 0; i < NUM_COUNTERS; ++i) {
+		if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs, i))) {
+			reset_value[i] = counter_config[i].count;
+
+			CTR_WRITE(counter_config[i].count, msrs, i);
+
+			CTRL_READ(low, high, msrs, i);
+			CTRL_CLEAR_LO(low);
+			CTRL_CLEAR_HI(high);
+			CTRL_SET_ENABLE(low);
+			CTRL_SET_USR(low, counter_config[i].user);
+			CTRL_SET_KERN(low, counter_config[i].kernel);
+			CTRL_SET_UM(low, counter_config[i].unit_mask);
+			CTRL_SET_EVENT_LOW(low, counter_config[i].event);
+			CTRL_SET_EVENT_HIGH(high, counter_config[i].event);
+			CTRL_SET_HOST_ONLY(high, 0);
+			CTRL_SET_GUEST_ONLY(high, 0);
+
+			CTRL_WRITE(low, high, msrs, i);
+		} else {
+			reset_value[i] = 0;
+		}
+	}
+}
+
+#ifdef CONFIG_OPROFILE_IBS
+
+static inline int
+op_amd_handle_ibs(struct pt_regs * const regs,
+		  struct op_msrs const * const msrs)
+{
+	unsigned int low, high;
+	struct ibs_fetch_sample ibs_fetch;
+	struct ibs_op_sample ibs_op;
+
+	if (!ibs_allowed)
+		return 1;
+
+	if (ibs_config.fetch_enabled) {
+		rdmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+		if (high & IBS_FETCH_HIGH_VALID_BIT) {
+			ibs_fetch.ibs_fetch_ctl_high = high;
+			ibs_fetch.ibs_fetch_ctl_low = low;
+			rdmsr(MSR_AMD64_IBSFETCHLINAD, low, high);
+			ibs_fetch.ibs_fetch_lin_addr_high = high;
+			ibs_fetch.ibs_fetch_lin_addr_low = low;
+			rdmsr(MSR_AMD64_IBSFETCHPHYSAD, low, high);
+			ibs_fetch.ibs_fetch_phys_addr_high = high;
+			ibs_fetch.ibs_fetch_phys_addr_low = low;
+
+			oprofile_add_ibs_sample(regs,
+						(unsigned int *)&ibs_fetch,
+						IBS_FETCH_BEGIN);
+
+			/*reenable the IRQ */
+			rdmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+			high &= ~IBS_FETCH_HIGH_VALID_BIT;
+			high |= IBS_FETCH_HIGH_ENABLE;
+			low &= IBS_FETCH_LOW_MAX_CNT_MASK;
+			wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+		}
+	}
+
+	if (ibs_config.op_enabled) {
+		rdmsr(MSR_AMD64_IBSOPCTL, low, high);
+		if (low & IBS_OP_LOW_VALID_BIT) {
+			rdmsr(MSR_AMD64_IBSOPRIP, low, high);
+			ibs_op.ibs_op_rip_low = low;
+			ibs_op.ibs_op_rip_high = high;
+			rdmsr(MSR_AMD64_IBSOPDATA, low, high);
+			ibs_op.ibs_op_data1_low = low;
+			ibs_op.ibs_op_data1_high = high;
+			rdmsr(MSR_AMD64_IBSOPDATA2, low, high);
+			ibs_op.ibs_op_data2_low = low;
+			ibs_op.ibs_op_data2_high = high;
+			rdmsr(MSR_AMD64_IBSOPDATA3, low, high);
+			ibs_op.ibs_op_data3_low = low;
+			ibs_op.ibs_op_data3_high = high;
+			rdmsr(MSR_AMD64_IBSDCLINAD, low, high);
+			ibs_op.ibs_dc_linear_low = low;
+			ibs_op.ibs_dc_linear_high = high;
+			rdmsr(MSR_AMD64_IBSDCPHYSAD, low, high);
+			ibs_op.ibs_dc_phys_low = low;
+			ibs_op.ibs_dc_phys_high = high;
+
+			/* reenable the IRQ */
+			oprofile_add_ibs_sample(regs,
+						(unsigned int *)&ibs_op,
+						IBS_OP_BEGIN);
+			rdmsr(MSR_AMD64_IBSOPCTL, low, high);
+			high = 0;
+			low &= ~IBS_OP_LOW_VALID_BIT;
+			low |= IBS_OP_LOW_ENABLE;
+			wrmsr(MSR_AMD64_IBSOPCTL, low, high);
+		}
+	}
+
+	return 1;
+}
+
+#endif
+
+static int op_amd_check_ctrs(struct pt_regs * const regs,
+			     struct op_msrs const * const msrs)
+{
+	unsigned int low, high;
+	int i;
+
+	for (i = 0 ; i < NUM_COUNTERS; ++i) {
+		if (!reset_value[i])
+			continue;
+		CTR_READ(low, high, msrs, i);
+		if (CTR_OVERFLOWED(low)) {
+			oprofile_add_sample(regs, i);
+			CTR_WRITE(reset_value[i], msrs, i);
+		}
+	}
+
+#ifdef CONFIG_OPROFILE_IBS
+	op_amd_handle_ibs(regs, msrs);
+#endif
+
+	/* See op_model_ppro.c */
+	return 1;
+}
+
+static void op_amd_start(struct op_msrs const * const msrs)
+{
+	unsigned int low, high;
+	int i;
+	for (i = 0 ; i < NUM_COUNTERS ; ++i) {
+		if (reset_value[i]) {
+			CTRL_READ(low, high, msrs, i);
+			CTRL_SET_ACTIVE(low);
+			CTRL_WRITE(low, high, msrs, i);
+		}
+	}
+
+#ifdef CONFIG_OPROFILE_IBS
+	if (ibs_allowed && ibs_config.fetch_enabled) {
+		low = (ibs_config.max_cnt_fetch >> 4) & 0xFFFF;
+		high = IBS_FETCH_HIGH_ENABLE;
+		wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+	}
+
+	if (ibs_allowed && ibs_config.op_enabled) {
+		low = ((ibs_config.max_cnt_op >> 4) & 0xFFFF) + IBS_OP_LOW_ENABLE;
+		high = 0;
+		wrmsr(MSR_AMD64_IBSOPCTL, low, high);
+	}
+#endif
+}
+
+
+static void op_amd_stop(struct op_msrs const * const msrs)
+{
+	unsigned int low, high;
+	int i;
+
+	/* Subtle: stop on all counters to avoid race with
+	 * setting our pm callback */
+	for (i = 0 ; i < NUM_COUNTERS ; ++i) {
+		if (!reset_value[i])
+			continue;
+		CTRL_READ(low, high, msrs, i);
+		CTRL_SET_INACTIVE(low);
+		CTRL_WRITE(low, high, msrs, i);
+	}
+
+#ifdef CONFIG_OPROFILE_IBS
+	if (ibs_allowed && ibs_config.fetch_enabled) {
+		low = 0;		/* clear max count and enable */
+		high = 0;
+		wrmsr(MSR_AMD64_IBSFETCHCTL, low, high);
+	}
+
+	if (ibs_allowed && ibs_config.op_enabled) {
+		low = 0;		/* clear max count and enable */
+		high = 0;
+		wrmsr(MSR_AMD64_IBSOPCTL, low, high);
+	}
+#endif
+}
+
+static void op_amd_shutdown(struct op_msrs const * const msrs)
+{
+	int i;
+
+	for (i = 0 ; i < NUM_COUNTERS ; ++i) {
+		if (CTR_IS_RESERVED(msrs, i))
+			release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
+	}
+	for (i = 0 ; i < NUM_CONTROLS ; ++i) {
+		if (CTRL_IS_RESERVED(msrs, i))
+			release_evntsel_nmi(MSR_K7_EVNTSEL0 + i);
+	}
+}
+
+#ifndef CONFIG_OPROFILE_IBS
+
+/* no IBS support */
+
+static int op_amd_init(struct oprofile_operations *ops)
+{
+	return 0;
+}
+
+static void op_amd_exit(void) {}
+
+#else
+
+static u8 ibs_eilvt_off;
+
+static inline void apic_init_ibs_nmi_per_cpu(void *arg)
+{
+	ibs_eilvt_off = setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_NMI, 0);
+}
+
+static inline void apic_clear_ibs_nmi_per_cpu(void *arg)
+{
+	setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_FIX, 1);
+}
+
+static int pfm_amd64_setup_eilvt(void)
+{
+#define IBSCTL_LVTOFFSETVAL		(1 << 8)
+#define IBSCTL				0x1cc
+	struct pci_dev *cpu_cfg;
+	int nodes;
+	u32 value = 0;
+
+	/* per CPU setup */
+	on_each_cpu(apic_init_ibs_nmi_per_cpu, NULL, 1);
+
+	nodes = 0;
+	cpu_cfg = NULL;
+	do {
+		cpu_cfg = pci_get_device(PCI_VENDOR_ID_AMD,
+					 PCI_DEVICE_ID_AMD_10H_NB_MISC,
+					 cpu_cfg);
+		if (!cpu_cfg)
+			break;
+		++nodes;
+		pci_write_config_dword(cpu_cfg, IBSCTL, ibs_eilvt_off
+				       | IBSCTL_LVTOFFSETVAL);
+		pci_read_config_dword(cpu_cfg, IBSCTL, &value);
+		if (value != (ibs_eilvt_off | IBSCTL_LVTOFFSETVAL)) {
+			printk(KERN_DEBUG "Failed to setup IBS LVT offset, "
+				"IBSCTL = 0x%08x", value);
+			return 1;
+		}
+	} while (1);
+
+	if (!nodes) {
+		printk(KERN_DEBUG "No CPU node configured for IBS");
+		return 1;
+	}
+
+#ifdef CONFIG_NUMA
+	/* Sanity check */
+	/* Works only for 64bit with proper numa implementation. */
+	if (nodes != num_possible_nodes()) {
+		printk(KERN_DEBUG "Failed to setup CPU node(s) for IBS, "
+			"found: %d, expected %d",
+			nodes, num_possible_nodes());
+		return 1;
+	}
+#endif
+	return 0;
+}
+
+/*
+ * initialize the APIC for the IBS interrupts
+ * if available (AMD Family10h rev B0 and later)
+ */
+static void setup_ibs(void)
+{
+	ibs_allowed = boot_cpu_has(X86_FEATURE_IBS);
+
+	if (!ibs_allowed)
+		return;
+
+	if (pfm_amd64_setup_eilvt()) {
+		ibs_allowed = 0;
+		return;
+	}
+
+	printk(KERN_INFO "oprofile: AMD IBS detected\n");
+}
+
+
+/*
+ * unitialize the APIC for the IBS interrupts if needed on AMD Family10h
+ * rev B0 and later */
+static void clear_ibs_nmi(void)
+{
+	if (ibs_allowed)
+		on_each_cpu(apic_clear_ibs_nmi_per_cpu, NULL, 1);
+}
+
+static int (*create_arch_files)(struct super_block * sb, struct dentry * root);
+
+static int setup_ibs_files(struct super_block * sb, struct dentry * root)
+{
+	char buf[12];
+	struct dentry *dir;
+	int ret = 0;
+
+	/* architecture specific files */
+	if (create_arch_files)
+		ret = create_arch_files(sb, root);
+
+	if (ret)
+		return ret;
+
+	if (!ibs_allowed)
+		return ret;
+
+	/* model specific files */
+
+	/* setup some reasonable defaults */
+	ibs_config.max_cnt_fetch = 250000;
+	ibs_config.fetch_enabled = 0;
+	ibs_config.max_cnt_op = 250000;
+	ibs_config.op_enabled = 0;
+	ibs_config.dispatched_ops = 1;
+	snprintf(buf,  sizeof(buf), "ibs_fetch");
+	dir = oprofilefs_mkdir(sb, root, buf);
+	oprofilefs_create_ulong(sb, dir, "rand_enable",
+				&ibs_config.rand_en);
+	oprofilefs_create_ulong(sb, dir, "enable",
+		&ibs_config.fetch_enabled);
+	oprofilefs_create_ulong(sb, dir, "max_count",
+		&ibs_config.max_cnt_fetch);
+	snprintf(buf,  sizeof(buf), "ibs_uops");
+	dir = oprofilefs_mkdir(sb, root, buf);
+	oprofilefs_create_ulong(sb, dir, "enable",
+		&ibs_config.op_enabled);
+	oprofilefs_create_ulong(sb, dir, "max_count",
+		&ibs_config.max_cnt_op);
+	oprofilefs_create_ulong(sb, dir, "dispatched_ops",
+		&ibs_config.dispatched_ops);
+
+	return 0;
+}
+
+static int op_amd_init(struct oprofile_operations *ops)
+{
+	setup_ibs();
+	create_arch_files = ops->create_files;
+	ops->create_files = setup_ibs_files;
+	return 0;
+}
+
+static void op_amd_exit(void)
+{
+	clear_ibs_nmi();
+}
+
+#endif
+
+struct op_x86_model_spec const op_amd_spec = {
+	.init = op_amd_init,
+	.exit = op_amd_exit,
+	.num_counters = NUM_COUNTERS,
+	.num_controls = NUM_CONTROLS,
+	.fill_in_addresses = &op_amd_fill_in_addresses,
+	.setup_ctrs = &op_amd_setup_ctrs,
+	.check_ctrs = &op_amd_check_ctrs,
+	.start = &op_amd_start,
+	.stop = &op_amd_stop,
+	.shutdown = &op_amd_shutdown
+};
diff --git a/arch/x86/oprofile/op_model_athlon.c b/arch/x86/oprofile/op_model_athlon.c
deleted file mode 100644
index 3d53487..0000000
--- a/arch/x86/oprofile/op_model_athlon.c
+++ /dev/null
@@ -1,190 +0,0 @@
-/*
- * @file op_model_athlon.h
- * athlon / K7 / K8 / Family 10h model-specific MSR operations
- *
- * @remark Copyright 2002 OProfile authors
- * @remark Read the file COPYING
- *
- * @author John Levon
- * @author Philippe Elie
- * @author Graydon Hoare
- */
-
-#include <linux/oprofile.h>
-#include <asm/ptrace.h>
-#include <asm/msr.h>
-#include <asm/nmi.h>
-
-#include "op_x86_model.h"
-#include "op_counter.h"
-
-#define NUM_COUNTERS 4
-#define NUM_CONTROLS 4
-
-#define CTR_IS_RESERVED(msrs, c) (msrs->counters[(c)].addr ? 1 : 0)
-#define CTR_READ(l, h, msrs, c) do {rdmsr(msrs->counters[(c)].addr, (l), (h)); } while (0)
-#define CTR_WRITE(l, msrs, c) do {wrmsr(msrs->counters[(c)].addr, -(unsigned int)(l), -1); } while (0)
-#define CTR_OVERFLOWED(n) (!((n) & (1U<<31)))
-
-#define CTRL_IS_RESERVED(msrs, c) (msrs->controls[(c)].addr ? 1 : 0)
-#define CTRL_READ(l, h, msrs, c) do {rdmsr(msrs->controls[(c)].addr, (l), (h)); } while (0)
-#define CTRL_WRITE(l, h, msrs, c) do {wrmsr(msrs->controls[(c)].addr, (l), (h)); } while (0)
-#define CTRL_SET_ACTIVE(n) (n |= (1<<22))
-#define CTRL_SET_INACTIVE(n) (n &= ~(1<<22))
-#define CTRL_CLEAR_LO(x) (x &= (1<<21))
-#define CTRL_CLEAR_HI(x) (x &= 0xfffffcf0)
-#define CTRL_SET_ENABLE(val) (val |= 1<<20)
-#define CTRL_SET_USR(val, u) (val |= ((u & 1) << 16))
-#define CTRL_SET_KERN(val, k) (val |= ((k & 1) << 17))
-#define CTRL_SET_UM(val, m) (val |= (m << 8))
-#define CTRL_SET_EVENT_LOW(val, e) (val |= (e & 0xff))
-#define CTRL_SET_EVENT_HIGH(val, e) (val |= ((e >> 8) & 0xf))
-#define CTRL_SET_HOST_ONLY(val, h) (val |= ((h & 1) << 9))
-#define CTRL_SET_GUEST_ONLY(val, h) (val |= ((h & 1) << 8))
-
-static unsigned long reset_value[NUM_COUNTERS];
-
-static void athlon_fill_in_addresses(struct op_msrs * const msrs)
-{
-	int i;
-
-	for (i = 0; i < NUM_COUNTERS; i++) {
-		if (reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i))
-			msrs->counters[i].addr = MSR_K7_PERFCTR0 + i;
-		else
-			msrs->counters[i].addr = 0;
-	}
-
-	for (i = 0; i < NUM_CONTROLS; i++) {
-		if (reserve_evntsel_nmi(MSR_K7_EVNTSEL0 + i))
-			msrs->controls[i].addr = MSR_K7_EVNTSEL0 + i;
-		else
-			msrs->controls[i].addr = 0;
-	}
-}
-
-
-static void athlon_setup_ctrs(struct op_msrs const * const msrs)
-{
-	unsigned int low, high;
-	int i;
-
-	/* clear all counters */
-	for (i = 0 ; i < NUM_CONTROLS; ++i) {
-		if (unlikely(!CTRL_IS_RESERVED(msrs, i)))
-			continue;
-		CTRL_READ(low, high, msrs, i);
-		CTRL_CLEAR_LO(low);
-		CTRL_CLEAR_HI(high);
-		CTRL_WRITE(low, high, msrs, i);
-	}
-
-	/* avoid a false detection of ctr overflows in NMI handler */
-	for (i = 0; i < NUM_COUNTERS; ++i) {
-		if (unlikely(!CTR_IS_RESERVED(msrs, i)))
-			continue;
-		CTR_WRITE(1, msrs, i);
-	}
-
-	/* enable active counters */
-	for (i = 0; i < NUM_COUNTERS; ++i) {
-		if ((counter_config[i].enabled) && (CTR_IS_RESERVED(msrs, i))) {
-			reset_value[i] = counter_config[i].count;
-
-			CTR_WRITE(counter_config[i].count, msrs, i);
-
-			CTRL_READ(low, high, msrs, i);
-			CTRL_CLEAR_LO(low);
-			CTRL_CLEAR_HI(high);
-			CTRL_SET_ENABLE(low);
-			CTRL_SET_USR(low, counter_config[i].user);
-			CTRL_SET_KERN(low, counter_config[i].kernel);
-			CTRL_SET_UM(low, counter_config[i].unit_mask);
-			CTRL_SET_EVENT_LOW(low, counter_config[i].event);
-			CTRL_SET_EVENT_HIGH(high, counter_config[i].event);
-			CTRL_SET_HOST_ONLY(high, 0);
-			CTRL_SET_GUEST_ONLY(high, 0);
-
-			CTRL_WRITE(low, high, msrs, i);
-		} else {
-			reset_value[i] = 0;
-		}
-	}
-}
-
-
-static int athlon_check_ctrs(struct pt_regs * const regs,
-			     struct op_msrs const * const msrs)
-{
-	unsigned int low, high;
-	int i;
-
-	for (i = 0 ; i < NUM_COUNTERS; ++i) {
-		if (!reset_value[i])
-			continue;
-		CTR_READ(low, high, msrs, i);
-		if (CTR_OVERFLOWED(low)) {
-			oprofile_add_sample(regs, i);
-			CTR_WRITE(reset_value[i], msrs, i);
-		}
-	}
-
-	/* See op_model_ppro.c */
-	return 1;
-}
-
-
-static void athlon_start(struct op_msrs const * const msrs)
-{
-	unsigned int low, high;
-	int i;
-	for (i = 0 ; i < NUM_COUNTERS ; ++i) {
-		if (reset_value[i]) {
-			CTRL_READ(low, high, msrs, i);
-			CTRL_SET_ACTIVE(low);
-			CTRL_WRITE(low, high, msrs, i);
-		}
-	}
-}
-
-
-static void athlon_stop(struct op_msrs const * const msrs)
-{
-	unsigned int low, high;
-	int i;
-
-	/* Subtle: stop on all counters to avoid race with
-	 * setting our pm callback */
-	for (i = 0 ; i < NUM_COUNTERS ; ++i) {
-		if (!reset_value[i])
-			continue;
-		CTRL_READ(low, high, msrs, i);
-		CTRL_SET_INACTIVE(low);
-		CTRL_WRITE(low, high, msrs, i);
-	}
-}
-
-static void athlon_shutdown(struct op_msrs const * const msrs)
-{
-	int i;
-
-	for (i = 0 ; i < NUM_COUNTERS ; ++i) {
-		if (CTR_IS_RESERVED(msrs, i))
-			release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
-	}
-	for (i = 0 ; i < NUM_CONTROLS ; ++i) {
-		if (CTRL_IS_RESERVED(msrs, i))
-			release_evntsel_nmi(MSR_K7_EVNTSEL0 + i);
-	}
-}
-
-struct op_x86_model_spec const op_athlon_spec = {
-	.num_counters = NUM_COUNTERS,
-	.num_controls = NUM_CONTROLS,
-	.fill_in_addresses = &athlon_fill_in_addresses,
-	.setup_ctrs = &athlon_setup_ctrs,
-	.check_ctrs = &athlon_check_ctrs,
-	.start = &athlon_start,
-	.stop = &athlon_stop,
-	.shutdown = &athlon_shutdown
-};
diff --git a/arch/x86/oprofile/op_x86_model.h b/arch/x86/oprofile/op_x86_model.h
index 45b605f..05a0261 100644
--- a/arch/x86/oprofile/op_x86_model.h
+++ b/arch/x86/oprofile/op_x86_model.h
@@ -32,6 +32,8 @@
  * various x86 CPU models' perfctr support.
  */
 struct op_x86_model_spec {
+	int (*init)(struct oprofile_operations *ops);
+	void (*exit)(void);
 	unsigned int const num_counters;
 	unsigned int const num_controls;
 	void (*fill_in_addresses)(struct op_msrs * const msrs);
@@ -46,6 +48,6 @@
 extern struct op_x86_model_spec const op_ppro_spec;
 extern struct op_x86_model_spec const op_p4_spec;
 extern struct op_x86_model_spec const op_p4_ht2_spec;
-extern struct op_x86_model_spec const op_athlon_spec;
+extern struct op_x86_model_spec const op_amd_spec;
 
 #endif /* OP_X86_MODEL_H */
diff --git a/arch/x86/pci/fixup.c b/arch/x86/pci/fixup.c
index 4bdaa59..3c27a80 100644
--- a/arch/x86/pci/fixup.c
+++ b/arch/x86/pci/fixup.c
@@ -511,3 +511,31 @@
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1202, fam10h_pci_cfg_space_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1203, fam10h_pci_cfg_space_size);
 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, 0x1204, fam10h_pci_cfg_space_size);
+
+/*
+ * SB600: Disable BAR1 on device 14.0 to avoid HPET resources from
+ * confusing the PCI engine:
+ */
+static void sb600_disable_hpet_bar(struct pci_dev *dev)
+{
+	u8 val;
+
+	/*
+	 * The SB600 and SB700 both share the same device
+	 * ID, but the PM register 0x55 does something different
+	 * for the SB700, so make sure we are dealing with the
+	 * SB600 before touching the bit:
+	 */
+
+	pci_read_config_byte(dev, 0x08, &val);
+
+	if (val < 0x2F) {
+		outb(0x55, 0xCD6);
+		val = inb(0xCD7);
+
+		/* Set bit 7 in PM register 0x55 */
+		outb(0x55, 0xCD6);
+		outb(val | 0x80, 0xCD7);
+	}
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_ATI, 0x4385, sb600_disable_hpet_bar);
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 8dfcf77..4426bb5 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -484,7 +484,7 @@
 		return -EUNATCH;
 
 	default:
-		err = n_tty_ioctl(tty, file, cmd, arg);
+		err = n_tty_ioctl_helper(tty, file, cmd, arg);
 		break;
 	};
 
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index caff851..700ff96 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -350,7 +350,7 @@
 
 config STALLION
 	tristate "Stallion EasyIO or EC8/32 support"
-	depends on STALDRV && BROKEN_ON_SMP && (ISA || EISA || PCI)
+	depends on STALDRV && (ISA || EISA || PCI)
 	help
 	  If you have an EasyIO or EasyConnection 8/32 multiport Stallion
 	  card, then this is for you; say Y.  Make sure to read
@@ -361,7 +361,7 @@
 
 config ISTALLION
 	tristate "Stallion EC8/64, ONboard, Brumby support"
-	depends on STALDRV && BROKEN_ON_SMP && (ISA || EISA || PCI)
+	depends on STALDRV && (ISA || EISA || PCI)
 	help
 	  If you have an EasyConnection 8/64, ONboard, Brumby or Stallion
 	  serial multiport card, say Y here. Make sure to read
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 6850f6d..1a4247d 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -7,7 +7,7 @@
 #
 FONTMAPFILE = cp437.uni
 
-obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o 
+obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o tty_buffer.o tty_port.o
 
 obj-$(CONFIG_LEGACY_PTYS)	+= pty.o
 obj-$(CONFIG_UNIX98_PTYS)	+= pty.o
diff --git a/drivers/char/amiserial.c b/drivers/char/amiserial.c
index 6e763e3..98821f9 100644
--- a/drivers/char/amiserial.c
+++ b/drivers/char/amiserial.c
@@ -837,9 +837,6 @@
 	struct async_struct *info;
 	unsigned long flags;
 
-	if (!tty)
-		return 0;
-
 	info = tty->driver_data;
 
 	if (serial_paranoia_check(info, tty->name, "rs_put_char"))
@@ -892,9 +889,6 @@
 	struct async_struct *info;
 	unsigned long flags;
 
-	if (!tty)
-		return 0;
-
 	info = tty->driver_data;
 
 	if (serial_paranoia_check(info, tty->name, "rs_write"))
diff --git a/drivers/char/applicom.c b/drivers/char/applicom.c
index 31d08b6..b899d91 100644
--- a/drivers/char/applicom.c
+++ b/drivers/char/applicom.c
@@ -712,8 +712,7 @@
 	
 	IndexCard = adgl->num_card-1;
 	 
-	if(cmd != 0 && cmd != 6 &&
-	   ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
+	if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
 		static int warncount = 10;
 		if (warncount) {
 			printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
@@ -832,8 +831,7 @@
 		}
 		break;
 	default:
-		printk(KERN_INFO "APPLICOM driver ioctl, unknown function code %d\n",cmd) ;
-		ret = -EINVAL;
+		ret = -ENOTTY;
 		break;
 	}
 	Dummy = readb(apbs[IndexCard].RamIO + VERS);
diff --git a/drivers/char/cyclades.c b/drivers/char/cyclades.c
index fe6d774..5e5b1dc 100644
--- a/drivers/char/cyclades.c
+++ b/drivers/char/cyclades.c
@@ -4993,12 +4993,14 @@
 			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
 		card_name = "Cyclom-Y";
 
-		addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
+		addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+				CyPCI_Yctl);
 		if (addr0 == NULL) {
 			dev_err(&pdev->dev, "can't remap ctl region\n");
 			goto err_reg;
 		}
-		addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
+		addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+				CyPCI_Ywin);
 		if (addr2 == NULL) {
 			dev_err(&pdev->dev, "can't remap base region\n");
 			goto err_unmap;
@@ -5013,7 +5015,8 @@
 	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
 		struct RUNTIME_9060 __iomem *ctl_addr;
 
-		ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
+		ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+				CyPCI_Zctl);
 		if (addr0 == NULL) {
 			dev_err(&pdev->dev, "can't remap ctl region\n");
 			goto err_reg;
@@ -5026,8 +5029,8 @@
 
 		mailbox = (u32)readl(&ctl_addr->mail_box_0);
 
-		addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
-				CyPCI_Ze_win : CyPCI_Zwin);
+		addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+				mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
 		if (addr2 == NULL) {
 			dev_err(&pdev->dev, "can't remap base region\n");
 			goto err_unmap;
@@ -5159,9 +5162,9 @@
 	cy_card[card_no].base_addr = NULL;
 	free_irq(irq, &cy_card[card_no]);
 err_unmap:
-	pci_iounmap(pdev, addr0);
+	iounmap(addr0);
 	if (addr2)
-		pci_iounmap(pdev, addr2);
+		iounmap(addr2);
 err_reg:
 	pci_release_regions(pdev);
 err_dis:
@@ -5186,9 +5189,9 @@
 		cy_writew(cinfo->ctl_addr + 0x68,
 				readw(cinfo->ctl_addr + 0x68) & ~0x0900);
 
-	pci_iounmap(pdev, cinfo->base_addr);
+	iounmap(cinfo->base_addr);
 	if (cinfo->ctl_addr)
-		pci_iounmap(pdev, cinfo->ctl_addr);
+		iounmap(cinfo->ctl_addr);
 	if (cinfo->irq
 #ifndef CONFIG_CYZ_INTR
 		&& !IS_CYC_Z(*cinfo)
diff --git a/drivers/char/epca.c b/drivers/char/epca.c
index 456e4ed..4998b27 100644
--- a/drivers/char/epca.c
+++ b/drivers/char/epca.c
@@ -1376,6 +1376,7 @@
 		unsigned long flags;
 		u16 tseg, rseg;
 
+		tty_port_init(&ch->port);
 		ch->brdchan = bc;
 		ch->mailbox = gd;
 		INIT_WORK(&ch->tqueue, do_softint);
@@ -1510,10 +1511,6 @@
 		ch->fepstopca = 0;
 
 		ch->close_delay = 50;
-		ch->port.count = 0;
-		ch->port.blocked_open = 0;
-		init_waitqueue_head(&ch->port.open_wait);
-		init_waitqueue_head(&ch->port.close_wait);
 
 		spin_unlock_irqrestore(&epca_lock, flags);
 	}
diff --git a/drivers/char/generic_serial.c b/drivers/char/generic_serial.c
index 19d3afb..c6090f8 100644
--- a/drivers/char/generic_serial.c
+++ b/drivers/char/generic_serial.c
@@ -54,8 +54,6 @@
 
 	func_enter (); 
 
-	if (!tty) return 0;
-
 	port = tty->driver_data;
 
 	if (!port) return 0;
@@ -97,8 +95,6 @@
 
 	func_enter ();
 
-	if (!tty) return 0;
-
 	port = tty->driver_data;
 
 	if (!port) return 0;
@@ -185,7 +181,6 @@
 	struct gs_port *port;
 	func_enter ();
 
-	if (!tty) return 0;
 	port = tty->driver_data;
 
 	if (!port->rd) return 0;
@@ -274,8 +269,6 @@
 
 	func_enter ();
 
-	if (!tty) return;
-
 	port = tty->driver_data;
 
 	if (!port) return;
@@ -296,8 +289,6 @@
 
 	func_enter ();
 
-	if (!tty) return;
-
 	port = tty->driver_data;
 
 	if (!port) return;
@@ -321,8 +312,6 @@
 
 	func_enter ();
 
-	if (!tty) return;
-
 	port = tty->driver_data;
 
 	if (!port) return;
@@ -341,8 +330,6 @@
 {
 	struct gs_port *port;
 
-	if (!tty) return;
-
 	port = tty->driver_data;
 
 	if (!port) return;
@@ -393,8 +380,6 @@
 
 	func_enter ();
 
-	if (!tty) return;
-
 	port = tty->driver_data;
 	tty = port->port.tty;
 	if (!tty) 
@@ -426,8 +411,6 @@
 
 	tty = port->port.tty;
 
-	if (!tty) return 0;
-
 	gs_dprintk (GS_DEBUG_BTR, "Entering gs_block_till_ready.\n"); 
 	/*
 	 * If the device is in the middle of being closed, then block
@@ -523,8 +506,6 @@
 	
 	func_enter ();
 
-	if (!tty) return;
-
 	port = (struct gs_port *) tty->driver_data;
 
 	if (!port) return;
@@ -621,8 +602,6 @@
 
 	func_enter();
 
-	if (!tty) return;
-
 	port = tty->driver_data;
 
 	if (!port) return;
diff --git a/drivers/char/hpet.c b/drivers/char/hpet.c
index b3f5dbc..f3cfb4c 100644
--- a/drivers/char/hpet.c
+++ b/drivers/char/hpet.c
@@ -53,6 +53,11 @@
 
 #define HPET_RANGE_SIZE		1024	/* from HPET spec */
 
+
+/* WARNING -- don't get confused.  These macros are never used
+ * to write the (single) counter, and rarely to read it.
+ * They're badly named; to fix, someday.
+ */
 #if BITS_PER_LONG == 64
 #define	write_counter(V, MC)	writeq(V, MC)
 #define	read_counter(MC)	readq(MC)
@@ -77,7 +82,7 @@
         .rating         = 250,
         .read           = read_hpet,
         .mask           = CLOCKSOURCE_MASK(64),
-        .mult           = 0, /*to be caluclated*/
+	.mult		= 0, /* to be calculated */
         .shift          = 10,
         .flags          = CLOCK_SOURCE_IS_CONTINUOUS,
 };
@@ -86,8 +91,6 @@
 
 /* A lock for concurrent access by app and isr hpet activity. */
 static DEFINE_SPINLOCK(hpet_lock);
-/* A lock for concurrent intermodule access to hpet and isr hpet activity. */
-static DEFINE_SPINLOCK(hpet_task_lock);
 
 #define	HPET_DEV_NAME	(7)
 
@@ -99,7 +102,6 @@
 	unsigned long hd_irqdata;
 	wait_queue_head_t hd_waitqueue;
 	struct fasync_struct *hd_async_queue;
-	struct hpet_task *hd_task;
 	unsigned int hd_flags;
 	unsigned int hd_irq;
 	unsigned int hd_hdwirq;
@@ -173,11 +175,6 @@
 		writel(isr, &devp->hd_hpet->hpet_isr);
 	spin_unlock(&hpet_lock);
 
-	spin_lock(&hpet_task_lock);
-	if (devp->hd_task)
-		devp->hd_task->ht_func(devp->hd_task->ht_data);
-	spin_unlock(&hpet_task_lock);
-
 	wake_up_interruptible(&devp->hd_waitqueue);
 
 	kill_fasync(&devp->hd_async_queue, SIGIO, POLL_IN);
@@ -185,6 +182,67 @@
 	return IRQ_HANDLED;
 }
 
+static void hpet_timer_set_irq(struct hpet_dev *devp)
+{
+	unsigned long v;
+	int irq, gsi;
+	struct hpet_timer __iomem *timer;
+
+	spin_lock_irq(&hpet_lock);
+	if (devp->hd_hdwirq) {
+		spin_unlock_irq(&hpet_lock);
+		return;
+	}
+
+	timer = devp->hd_timer;
+
+	/* we prefer level triggered mode */
+	v = readl(&timer->hpet_config);
+	if (!(v & Tn_INT_TYPE_CNF_MASK)) {
+		v |= Tn_INT_TYPE_CNF_MASK;
+		writel(v, &timer->hpet_config);
+	}
+	spin_unlock_irq(&hpet_lock);
+
+	v = (readq(&timer->hpet_config) & Tn_INT_ROUTE_CAP_MASK) >>
+				 Tn_INT_ROUTE_CAP_SHIFT;
+
+	/*
+	 * In PIC mode, skip IRQ0-4, IRQ6-9, IRQ12-15 which is always used by
+	 * legacy device. In IO APIC mode, we skip all the legacy IRQS.
+	 */
+	if (acpi_irq_model == ACPI_IRQ_MODEL_PIC)
+		v &= ~0xf3df;
+	else
+		v &= ~0xffff;
+
+	for (irq = find_first_bit(&v, HPET_MAX_IRQ); irq < HPET_MAX_IRQ;
+		irq = find_next_bit(&v, HPET_MAX_IRQ, 1 + irq)) {
+
+		if (irq >= NR_IRQS) {
+			irq = HPET_MAX_IRQ;
+			break;
+		}
+
+		gsi = acpi_register_gsi(irq, ACPI_LEVEL_SENSITIVE,
+					ACPI_ACTIVE_LOW);
+		if (gsi > 0)
+			break;
+
+		/* FIXME: Setup interrupt source table */
+	}
+
+	if (irq < HPET_MAX_IRQ) {
+		spin_lock_irq(&hpet_lock);
+		v = readl(&timer->hpet_config);
+		v |= irq << Tn_INT_ROUTE_CNF_SHIFT;
+		writel(v, &timer->hpet_config);
+		devp->hd_hdwirq = gsi;
+		spin_unlock_irq(&hpet_lock);
+	}
+	return;
+}
+
 static int hpet_open(struct inode *inode, struct file *file)
 {
 	struct hpet_dev *devp;
@@ -199,8 +257,7 @@
 
 	for (devp = NULL, hpetp = hpets; hpetp && !devp; hpetp = hpetp->hp_next)
 		for (i = 0; i < hpetp->hp_ntimer; i++)
-			if (hpetp->hp_dev[i].hd_flags & HPET_OPEN
-			    || hpetp->hp_dev[i].hd_task)
+			if (hpetp->hp_dev[i].hd_flags & HPET_OPEN)
 				continue;
 			else {
 				devp = &hpetp->hp_dev[i];
@@ -219,6 +276,8 @@
 	spin_unlock_irq(&hpet_lock);
 	unlock_kernel();
 
+	hpet_timer_set_irq(devp);
+
 	return 0;
 }
 
@@ -441,7 +500,11 @@
 	devp->hd_irq = irq;
 	t = devp->hd_ireqfreq;
 	v = readq(&timer->hpet_config);
-	g = v | Tn_INT_ENB_CNF_MASK;
+
+	/* 64-bit comparators are not yet supported through the ioctls,
+	 * so force this into 32-bit mode if it supports both modes
+	 */
+	g = v | Tn_32MODE_CNF_MASK | Tn_INT_ENB_CNF_MASK;
 
 	if (devp->hd_flags & HPET_PERIODIC) {
 		write_counter(t, &timer->hpet_compare);
@@ -451,6 +514,12 @@
 		v |= Tn_VAL_SET_CNF_MASK;
 		writeq(v, &timer->hpet_config);
 		local_irq_save(flags);
+
+		/* NOTE:  what we modify here is a hidden accumulator
+		 * register supported by periodic-capable comparators.
+		 * We never want to modify the (single) counter; that
+		 * would affect all the comparators.
+		 */
 		m = read_counter(&hpet->hpet_mc);
 		write_counter(t + m + hpetp->hp_delta, &timer->hpet_compare);
 	} else {
@@ -604,57 +673,6 @@
 	return 0;
 }
 
-static inline int hpet_tpcheck(struct hpet_task *tp)
-{
-	struct hpet_dev *devp;
-	struct hpets *hpetp;
-
-	devp = tp->ht_opaque;
-
-	if (!devp)
-		return -ENXIO;
-
-	for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
-		if (devp >= hpetp->hp_dev
-		    && devp < (hpetp->hp_dev + hpetp->hp_ntimer)
-		    && devp->hd_hpet == hpetp->hp_hpet)
-			return 0;
-
-	return -ENXIO;
-}
-
-#if 0
-int hpet_unregister(struct hpet_task *tp)
-{
-	struct hpet_dev *devp;
-	struct hpet_timer __iomem *timer;
-	int err;
-
-	if ((err = hpet_tpcheck(tp)))
-		return err;
-
-	spin_lock_irq(&hpet_task_lock);
-	spin_lock(&hpet_lock);
-
-	devp = tp->ht_opaque;
-	if (devp->hd_task != tp) {
-		spin_unlock(&hpet_lock);
-		spin_unlock_irq(&hpet_task_lock);
-		return -ENXIO;
-	}
-
-	timer = devp->hd_timer;
-	writeq((readq(&timer->hpet_config) & ~Tn_INT_ENB_CNF_MASK),
-	       &timer->hpet_config);
-	devp->hd_flags &= ~(HPET_IE | HPET_PERIODIC);
-	devp->hd_task = NULL;
-	spin_unlock(&hpet_lock);
-	spin_unlock_irq(&hpet_task_lock);
-
-	return 0;
-}
-#endif  /*  0  */
-
 static ctl_table hpet_table[] = {
 	{
 	 .ctl_name = CTL_UNNUMBERED,
@@ -746,6 +764,7 @@
 	static struct hpets *last = NULL;
 	unsigned long period;
 	unsigned long long temp;
+	u32 remainder;
 
 	/*
 	 * hpet_alloc can be called by platform dependent code.
@@ -809,9 +828,13 @@
 		printk("%s %d", i > 0 ? "," : "", hdp->hd_irq[i]);
 	printk("\n");
 
-	printk(KERN_INFO "hpet%u: %u %d-bit timers, %Lu Hz\n",
-	       hpetp->hp_which, hpetp->hp_ntimer,
-	       cap & HPET_COUNTER_SIZE_MASK ? 64 : 32, hpetp->hp_tick_freq);
+	temp = hpetp->hp_tick_freq;
+	remainder = do_div(temp, 1000000);
+	printk(KERN_INFO
+		"hpet%u: %u comparators, %d-bit %u.%06u MHz counter\n",
+		hpetp->hp_which, hpetp->hp_ntimer,
+		cap & HPET_COUNTER_SIZE_MASK ? 64 : 32,
+		(unsigned) temp, remainder);
 
 	mcfg = readq(&hpet->hpet_config);
 	if ((mcfg & HPET_ENABLE_CNF_MASK) == 0) {
@@ -874,8 +897,6 @@
 		hdp->hd_address = ioremap(addr.minimum, addr.address_length);
 
 		if (hpet_is_known(hdp)) {
-			printk(KERN_DEBUG "%s: 0x%lx is busy\n",
-				__func__, hdp->hd_phys_address);
 			iounmap(hdp->hd_address);
 			return AE_ALREADY_EXISTS;
 		}
@@ -891,8 +912,6 @@
 						HPET_RANGE_SIZE);
 
 		if (hpet_is_known(hdp)) {
-			printk(KERN_DEBUG "%s: 0x%lx is busy\n",
-				__func__, hdp->hd_phys_address);
 			iounmap(hdp->hd_address);
 			return AE_ALREADY_EXISTS;
 		}
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index fd64137..ec7aded 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -819,11 +819,11 @@
 	hvc_driver = drv;
 	return 0;
 
-put_tty:
-	put_tty_driver(hvc_driver);
 stop_thread:
 	kthread_stop(hvc_task);
 	hvc_task = NULL;
+put_tty:
+	put_tty_driver(drv);
 out:
 	return err;
 }
diff --git a/drivers/char/ip2/Makefile b/drivers/char/ip2/Makefile
index 939618f..bc397d9 100644
--- a/drivers/char/ip2/Makefile
+++ b/drivers/char/ip2/Makefile
@@ -4,5 +4,5 @@
 
 obj-$(CONFIG_COMPUTONE)         += ip2.o
 
-ip2-objs			:= ip2base.o ip2main.o
+ip2-objs			:= ip2main.o
 
diff --git a/drivers/char/ip2/i2ellis.c b/drivers/char/ip2/i2ellis.c
index 3601017..29db44d 100644
--- a/drivers/char/ip2/i2ellis.c
+++ b/drivers/char/ip2/i2ellis.c
@@ -69,38 +69,6 @@
 //=======================================================
 
 //******************************************************************************
-// Function:   iiEllisInit()
-// Parameters: None
-//
-// Returns:    Nothing
-//
-// Description:
-//
-// This routine performs any required initialization of the iiEllis subsystem.
-//
-//******************************************************************************
-static void
-iiEllisInit(void)
-{
-}
-
-//******************************************************************************
-// Function:   iiEllisCleanup()
-// Parameters: None
-//
-// Returns:    Nothing
-//
-// Description:
-//
-// This routine performs any required cleanup of the iiEllis subsystem.
-//
-//******************************************************************************
-static void
-iiEllisCleanup(void)
-{
-}
-
-//******************************************************************************
 // Function:   iiSetAddress(pB, address, delay)
 // Parameters: pB      - pointer to the board structure
 //             address - the purported I/O address of the board
diff --git a/drivers/char/ip2/i2ellis.h b/drivers/char/ip2/i2ellis.h
index c88a64e..fb6df24 100644
--- a/drivers/char/ip2/i2ellis.h
+++ b/drivers/char/ip2/i2ellis.h
@@ -511,7 +511,6 @@
 //
 // Initialization of a board & structure is in four (five!) parts:
 //
-// 0) iiEllisInit()  - Initialize iiEllis subsystem.
 // 1) iiSetAddress() - Define the board address & delay function for a board.
 // 2) iiReset()      - Reset the board   (provided it exists)
 //       -- Note you may do this to several boards --
@@ -523,7 +522,6 @@
 // loadware.  To change loadware, you must begin again with step 2, resetting
 // the board again (step 1 not needed).
 
-static void iiEllisInit(void);
 static int iiSetAddress(i2eBordStrPtr, int, delayFunc_t );
 static int iiReset(i2eBordStrPtr);
 static int iiResetDelay(i2eBordStrPtr);
diff --git a/drivers/char/ip2/ip2base.c b/drivers/char/ip2/ip2base.c
deleted file mode 100644
index 8155e24..0000000
--- a/drivers/char/ip2/ip2base.c
+++ /dev/null
@@ -1,108 +0,0 @@
-// ip2.c
-// This is a dummy module to make the firmware available when needed
-// and allows it to be unloaded when not. Rumor is the __initdata 
-// macro doesn't always works on all platforms so we use this kludge.
-// If not compiled as a module it just makes fip_firm avaliable then
-//  __initdata should work as advertized
-//
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/wait.h>
-
-#ifndef __init
-#define __init
-#endif
-#ifndef __initfunc
-#define __initfunc(a) a
-#endif
-#ifndef __initdata
-#define __initdata
-#endif
-
-#include "ip2types.h"		
-
-int
-ip2_loadmain(int *, int *); // ref into ip2main.c
-
-/* Note: Add compiled in defaults to these arrays, not to the structure
-	in ip2.h any longer.  That structure WILL get overridden
-	by these values, or command line values, or insmod values!!!  =mhw=
-*/
-static int io[IP2_MAX_BOARDS]= { 0, 0, 0, 0 };
-static int irq[IP2_MAX_BOARDS] = { -1, -1, -1, -1 }; 
-
-static int poll_only = 0;
-
-MODULE_AUTHOR("Doug McNash");
-MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
-module_param_array(irq, int, NULL, 0);
-MODULE_PARM_DESC(irq,"Interrupts for IntelliPort Cards");
-module_param_array(io, int, NULL, 0);
-MODULE_PARM_DESC(io,"I/O ports for IntelliPort Cards");
-module_param(poll_only, bool, 0);
-MODULE_PARM_DESC(poll_only,"Do not use card interrupts");
-
-
-static int __init ip2_init(void)
-{
-	if( poll_only ) {
-		/* Hard lock the interrupts to zero */
-		irq[0] = irq[1] = irq[2] = irq[3] = 0;
-	}
-
-	return ip2_loadmain(io, irq);
-}
-module_init(ip2_init);
-
-MODULE_LICENSE("GPL");
-
-#ifndef MODULE
-/******************************************************************************
- *	ip2_setup:
- *		str: kernel command line string
- *
- *	Can't autoprobe the boards so user must specify configuration on
- *	kernel command line.  Sane people build it modular but the others
- *	come here.
- *
- *	Alternating pairs of io,irq for up to 4 boards.
- *		ip2=io0,irq0,io1,irq1,io2,irq2,io3,irq3
- *
- *		io=0 => No board
- *		io=1 => PCI
- *		io=2 => EISA
- *		else => ISA I/O address
- *
- *		irq=0 or invalid for ISA will revert to polling mode
- *
- *		Any value = -1, do not overwrite compiled in value.
- *
- ******************************************************************************/
-static int __init ip2_setup(char *str)
-{
-	int	ints[10];	/* 4 boards, 2 parameters + 2 */
-	int	i, j;
-
-	str = get_options (str, ARRAY_SIZE(ints), ints);
-
-	for( i = 0, j = 1; i < 4; i++ ) {
-		if( j > ints[0] ) {
-			break;
-		}
-		if( ints[j] >= 0 ) {
-			io[i] = ints[j];
-		}
-		j++;
-		if( j > ints[0] ) {
-			break;
-		}
-		if( ints[j] >= 0 ) {
-			irq[i] = ints[j];
-		}
-		j++;
-	}
-	return 1;
-}
-__setup("ip2=", ip2_setup);
-#endif /* !MODULE */
diff --git a/drivers/char/ip2/ip2main.c b/drivers/char/ip2/ip2main.c
index 689f9dc..6774572 100644
--- a/drivers/char/ip2/ip2main.c
+++ b/drivers/char/ip2/ip2main.c
@@ -150,15 +150,12 @@
 /*************/
 
 /* String constants to identify ourselves */
-static char *pcName    = "Computone IntelliPort Plus multiport driver";
-static char *pcVersion = "1.2.14";
+static const char pcName[] = "Computone IntelliPort Plus multiport driver";
+static const char pcVersion[] = "1.2.14";
 
 /* String constants for port names */
-static char *pcDriver_name   = "ip2";
-static char *pcIpl    		 = "ip2ipl";
-
-// cheezy kludge or genius - you decide?
-int ip2_loadmain(int *, int *);
+static const char pcDriver_name[] = "ip2";
+static const char pcIpl[] = "ip2ipl";
 
 /***********************/
 /* Function Prototypes */
@@ -240,8 +237,8 @@
 	.open		= ip2_ipl_open,
 }; 
 
-static unsigned long irq_counter = 0;
-static unsigned long bh_counter = 0;
+static unsigned long irq_counter;
+static unsigned long bh_counter;
 
 // Use immediate queue to service interrupts
 #define USE_IQI
@@ -252,7 +249,6 @@
  */
 #define  POLL_TIMEOUT   (jiffies + 1)
 static DEFINE_TIMER(PollTimer, ip2_poll, 0, 0);
-static char  TimerOn;
 
 #ifdef IP2DEBUG_TRACE
 /* Trace (debug) buffer data */
@@ -268,8 +264,8 @@
 /**********/
 
 #if defined(MODULE) && defined(IP2DEBUG_OPEN)
-#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, ttyc=%d, modc=%x -> %s\n", \
-		    tty->name,(pCh->flags),ip2_tty_driver->refcount, \
+#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] ttyc=%d, modc=%x -> %s\n", \
+		    tty->name,(pCh->flags), \
 		    tty->count,/*GET_USE_COUNT(module)*/0,s)
 #else
 #define DBG_CNT(s)
@@ -287,8 +283,9 @@
 
 MODULE_AUTHOR("Doug McNash");
 MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
+MODULE_LICENSE("GPL");
 
-static int poll_only = 0;
+static int poll_only;
 
 static int Eisa_irq;
 static int Eisa_slot;
@@ -297,34 +294,46 @@
 static char rirqs[IP2_MAX_BOARDS];
 static int Valid_Irqs[] = { 3, 4, 5, 7, 10, 11, 12, 15, 0};
 
+/* Note: Add compiled in defaults to these arrays, not to the structure
+	in ip2.h any longer.  That structure WILL get overridden
+	by these values, or command line values, or insmod values!!!  =mhw=
+*/
+static int io[IP2_MAX_BOARDS];
+static int irq[IP2_MAX_BOARDS] = { -1, -1, -1, -1 };
+
+MODULE_AUTHOR("Doug McNash");
+MODULE_DESCRIPTION("Computone IntelliPort Plus Driver");
+module_param_array(irq, int, NULL, 0);
+MODULE_PARM_DESC(irq, "Interrupts for IntelliPort Cards");
+module_param_array(io, int, NULL, 0);
+MODULE_PARM_DESC(io, "I/O ports for IntelliPort Cards");
+module_param(poll_only, bool, 0);
+MODULE_PARM_DESC(poll_only, "Do not use card interrupts");
+
 /* for sysfs class support */
 static struct class *ip2_class;
 
-// Some functions to keep track of what irq's we have
+/* Some functions to keep track of what irqs we have */
 
-static int
-is_valid_irq(int irq)
+static int __init is_valid_irq(int irq)
 {
 	int *i = Valid_Irqs;
 	
-	while ((*i != 0) && (*i != irq)) {
+	while (*i != 0 && *i != irq)
 		i++;
-	}
-	return (*i);
+
+	return *i;
 }
 
-static void
-mark_requested_irq( char irq )
+static void __init mark_requested_irq(char irq)
 {
 	rirqs[iindx++] = irq;
 }
 
-#ifdef MODULE
-static int
-clear_requested_irq( char irq )
+static int __exit clear_requested_irq(char irq)
 {
 	int i;
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
 		if (rirqs[i] == irq) {
 			rirqs[i] = 0;
 			return 1;
@@ -332,17 +341,15 @@
 	}
 	return 0;
 }
-#endif
 
-static int
-have_requested_irq( char irq )
+static int have_requested_irq(char irq)
 {
-	// array init to zeros so 0 irq will not be requested as a side effect
+	/* array init to zeros so 0 irq will not be requested as a side
+	 * effect */
 	int i;
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
+	for (i = 0; i < IP2_MAX_BOARDS; ++i)
 		if (rirqs[i] == irq)
 			return 1;
-	}
 	return 0;
 }
 
@@ -361,53 +368,45 @@
 /* handle subsequent installations of the driver. All memory allocated by the */
 /* driver should be returned since it may be unloaded from memory.            */
 /******************************************************************************/
-#ifdef MODULE
-void __exit
-ip2_cleanup_module(void)
+static void __exit ip2_cleanup_module(void)
 {
 	int err;
 	int i;
 
-#ifdef IP2DEBUG_INIT
-	printk (KERN_DEBUG "Unloading %s: version %s\n", pcName, pcVersion );
-#endif
-	/* Stop poll timer if we had one. */
-	if ( TimerOn ) {
-		del_timer ( &PollTimer );
-		TimerOn = 0;
-	}
+	del_timer_sync(&PollTimer);
 
 	/* Reset the boards we have. */
-	for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-		if ( i2BoardPtrTable[i] ) {
-			iiReset( i2BoardPtrTable[i] );
-		}
-	}
+	for (i = 0; i < IP2_MAX_BOARDS; i++)
+		if (i2BoardPtrTable[i])
+			iiReset(i2BoardPtrTable[i]);
 
 	/* The following is done at most once, if any boards were installed. */
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-		if ( i2BoardPtrTable[i] ) {
-			iiResetDelay( i2BoardPtrTable[i] );
+	for (i = 0; i < IP2_MAX_BOARDS; i++) {
+		if (i2BoardPtrTable[i]) {
+			iiResetDelay(i2BoardPtrTable[i]);
 			/* free io addresses and Tibet */
-			release_region( ip2config.addr[i], 8 );
+			release_region(ip2config.addr[i], 8);
 			device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i));
-			device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
+			device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR,
+						4 * i + 1));
 		}
 		/* Disable and remove interrupt handler. */
-		if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) {	
-			free_irq ( ip2config.irq[i], (void *)&pcName);
-			clear_requested_irq( ip2config.irq[i]);
+		if (ip2config.irq[i] > 0 &&
+				have_requested_irq(ip2config.irq[i])) {
+			free_irq(ip2config.irq[i], (void *)&pcName);
+			clear_requested_irq(ip2config.irq[i]);
 		}
 	}
 	class_destroy(ip2_class);
-	if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) {
-		printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err);
-	}
+	err = tty_unregister_driver(ip2_tty_driver);
+	if (err)
+		printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n",
+				err);
 	put_tty_driver(ip2_tty_driver);
 	unregister_chrdev(IP2_IPL_MAJOR, pcIpl);
 	remove_proc_entry("ip2mem", NULL);
 
-	// free memory
+	/* free memory */
 	for (i = 0; i < IP2_MAX_BOARDS; i++) {
 		void *pB;
 #ifdef CONFIG_PCI
@@ -417,24 +416,18 @@
 			ip2config.pci_dev[i] = NULL;
 		}
 #endif
-		if ((pB = i2BoardPtrTable[i]) != 0 ) {
-			kfree ( pB );
+		pB = i2BoardPtrTable[i];
+		if (pB != NULL) {
+			kfree(pB);
 			i2BoardPtrTable[i] = NULL;
 		}
-		if ((DevTableMem[i]) != NULL ) {
-			kfree ( DevTableMem[i]  );
+		if (DevTableMem[i] != NULL) {
+			kfree(DevTableMem[i]);
 			DevTableMem[i] = NULL;
 		}
 	}
-
-	/* Cleanup the iiEllis subsystem. */
-	iiEllisCleanup();
-#ifdef IP2DEBUG_INIT
-	printk (KERN_DEBUG "IP2 Unloaded\n" );
-#endif
 }
 module_exit(ip2_cleanup_module);
-#endif /* MODULE */
 
 static const struct tty_operations ip2_ops = {
 	.open            = ip2_open,
@@ -494,139 +487,168 @@
 	return fw;
 }
 
-int
-ip2_loadmain(int *iop, int *irqp)
+#ifndef MODULE
+/******************************************************************************
+ *	ip2_setup:
+ *		str: kernel command line string
+ *
+ *	Can't autoprobe the boards so user must specify configuration on
+ *	kernel command line.  Sane people build it modular but the others
+ *	come here.
+ *
+ *	Alternating pairs of io,irq for up to 4 boards.
+ *		ip2=io0,irq0,io1,irq1,io2,irq2,io3,irq3
+ *
+ *		io=0 => No board
+ *		io=1 => PCI
+ *		io=2 => EISA
+ *		else => ISA I/O address
+ *
+ *		irq=0 or invalid for ISA will revert to polling mode
+ *
+ *		Any value = -1, do not overwrite compiled in value.
+ *
+ ******************************************************************************/
+static int __init ip2_setup(char *str)
+{
+	int j, ints[10];	/* 4 boards, 2 parameters + 2 */
+	unsigned int i;
+
+	str = get_options(str, ARRAY_SIZE(ints), ints);
+
+	for (i = 0, j = 1; i < 4; i++) {
+		if (j > ints[0])
+			break;
+		if (ints[j] >= 0)
+			io[i] = ints[j];
+		j++;
+		if (j > ints[0])
+			break;
+		if (ints[j] >= 0)
+			irq[i] = ints[j];
+		j++;
+	}
+	return 1;
+}
+__setup("ip2=", ip2_setup);
+#endif /* !MODULE */
+
+static int __init ip2_loadmain(void)
 {
 	int i, j, box;
 	int err = 0;
-	static int loaded;
 	i2eBordStrPtr pB = NULL;
 	int rc = -1;
-	static struct pci_dev *pci_dev_i = NULL;
+	struct pci_dev *pdev = NULL;
 	const struct firmware *fw = NULL;
 
-	ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0 );
+	if (poll_only) {
+		/* Hard lock the interrupts to zero */
+		irq[0] = irq[1] = irq[2] = irq[3] = poll_only = 0;
+	}
+
+	ip2trace(ITRC_NO_PORT, ITRC_INIT, ITRC_ENTER, 0);
 
 	/* process command line arguments to modprobe or
 		insmod i.e. iop & irqp */
 	/* irqp and iop should ALWAYS be specified now...  But we check
 		them individually just to be sure, anyways... */
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-		if (iop) {
-			ip2config.addr[i] = iop[i];
-			if (irqp) {
-				if( irqp[i] >= 0 ) {
-					ip2config.irq[i] = irqp[i];
-				} else {
-					ip2config.irq[i] = 0;
-				}
-	// This is a little bit of a hack.  If poll_only=1 on command
-	// line back in ip2.c OR all IRQs on all specified boards are
-	// explicitly set to 0, then drop to poll only mode and override
-	// PCI or EISA interrupts.  This superceeds the old hack of
-	// triggering if all interrupts were zero (like da default).
-	// Still a hack but less prone to random acts of terrorism.
-	//
-	// What we really should do, now that the IRQ default is set
-	// to -1, is to use 0 as a hard coded, do not probe.
-	//
-	//	/\/\|=mhw=|\/\/
-				poll_only |= irqp[i];
-			}
-		}
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
+		ip2config.addr[i] = io[i];
+		if (irq[i] >= 0)
+			ip2config.irq[i] = irq[i];
+		else
+			ip2config.irq[i] = 0;
+	/* This is a little bit of a hack.  If poll_only=1 on command
+	   line back in ip2.c OR all IRQs on all specified boards are
+	   explicitly set to 0, then drop to poll only mode and override
+	   PCI or EISA interrupts.  This superceeds the old hack of
+	   triggering if all interrupts were zero (like da default).
+	   Still a hack but less prone to random acts of terrorism.
+
+	   What we really should do, now that the IRQ default is set
+	   to -1, is to use 0 as a hard coded, do not probe.
+
+		/\/\|=mhw=|\/\/
+	*/
+		poll_only |= irq[i];
 	}
 	poll_only = !poll_only;
 
 	/* Announce our presence */
-	printk( KERN_INFO "%s version %s\n", pcName, pcVersion );
-
-	// ip2 can be unloaded and reloaded for no good reason
-	// we can't let that happen here or bad things happen
-	// second load hoses board but not system - fixme later
-	if (loaded) {
-		printk( KERN_INFO "Still loaded\n" );
-		return 0;
-	}
-	loaded++;
+	printk(KERN_INFO "%s version %s\n", pcName, pcVersion);
 
 	ip2_tty_driver = alloc_tty_driver(IP2_MAX_PORTS);
 	if (!ip2_tty_driver)
 		return -ENOMEM;
 
-	/* Initialise the iiEllis subsystem. */
-	iiEllisInit();
-
-	/* Initialize arrays. */
-	memset( i2BoardPtrTable, 0, sizeof i2BoardPtrTable );
-	memset( DevTable, 0, sizeof DevTable );
-
 	/* Initialise all the boards we can find (up to the maximum). */
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-		switch ( ip2config.addr[i] ) { 
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
+		switch (ip2config.addr[i]) {
 		case 0:	/* skip this slot even if card is present */
 			break;
 		default: /* ISA */
 		   /* ISA address must be specified */
-			if ( (ip2config.addr[i] < 0x100) || (ip2config.addr[i] > 0x3f8) ) {
-				printk ( KERN_ERR "IP2: Bad ISA board %d address %x\n",
-							 i, ip2config.addr[i] );
+			if (ip2config.addr[i] < 0x100 ||
+					ip2config.addr[i] > 0x3f8) {
+				printk(KERN_ERR "IP2: Bad ISA board %d "
+						"address %x\n", i,
+						ip2config.addr[i]);
 				ip2config.addr[i] = 0;
-			} else {
-				ip2config.type[i] = ISA;
+				break;
+			}
+			ip2config.type[i] = ISA;
 
-				/* Check for valid irq argument, set for polling if invalid */
-				if (ip2config.irq[i] && !is_valid_irq(ip2config.irq[i])) {
-					printk(KERN_ERR "IP2: Bad IRQ(%d) specified\n",ip2config.irq[i]);
-					ip2config.irq[i] = 0;// 0 is polling and is valid in that sense
-				}
+			/* Check for valid irq argument, set for polling if
+			 * invalid */
+			if (ip2config.irq[i] &&
+					!is_valid_irq(ip2config.irq[i])) {
+				printk(KERN_ERR "IP2: Bad IRQ(%d) specified\n",
+						ip2config.irq[i]);
+				/* 0 is polling and is valid in that sense */
+				ip2config.irq[i] = 0;
 			}
 			break;
 		case PCI:
 #ifdef CONFIG_PCI
-			{
-				int status;
+		{
+			u32 addr;
+			int status;
 
-				pci_dev_i = pci_get_device(PCI_VENDOR_ID_COMPUTONE,
-							  PCI_DEVICE_ID_COMPUTONE_IP2EX, pci_dev_i);
-				if (pci_dev_i != NULL) {
-					unsigned int addr;
-
-					if (pci_enable_device(pci_dev_i)) {
-						printk( KERN_ERR "IP2: can't enable PCI device at %s\n",
-							pci_name(pci_dev_i));
-						break;
-					}
-					ip2config.type[i] = PCI;
-					ip2config.pci_dev[i] = pci_dev_get(pci_dev_i);
-					status =
-					pci_read_config_dword(pci_dev_i, PCI_BASE_ADDRESS_1, &addr);
-					if ( addr & 1 ) {
-						ip2config.addr[i]=(USHORT)(addr&0xfffe);
-					} else {
-						printk( KERN_ERR "IP2: PCI I/O address error\n");
-					}
-
-//		If the PCI BIOS assigned it, lets try and use it.  If we
-//		can't acquire it or it screws up, deal with it then.
-
-//					if (!is_valid_irq(pci_irq)) {
-//						printk( KERN_ERR "IP2: Bad PCI BIOS IRQ(%d)\n",pci_irq);
-//						pci_irq = 0;
-//					}
-					ip2config.irq[i] = pci_dev_i->irq;
-				} else {	// ann error
-					ip2config.addr[i] = 0;
-					printk(KERN_ERR "IP2: PCI board %d not found\n", i);
-				} 
+			pdev = pci_get_device(PCI_VENDOR_ID_COMPUTONE,
+					PCI_DEVICE_ID_COMPUTONE_IP2EX, pdev);
+			if (pdev == NULL) {
+				ip2config.addr[i] = 0;
+				printk(KERN_ERR "IP2: PCI board %d not "
+						"found\n", i);
+				break;
 			}
+
+			if (pci_enable_device(pdev)) {
+				dev_err(&pdev->dev, "can't enable device\n");
+				break;
+			}
+			ip2config.type[i] = PCI;
+			ip2config.pci_dev[i] = pci_dev_get(pdev);
+			status = pci_read_config_dword(pdev, PCI_BASE_ADDRESS_1,
+					&addr);
+			if (addr & 1)
+				ip2config.addr[i] = (USHORT)(addr & 0xfffe);
+			else
+				dev_err(&pdev->dev, "I/O address error\n");
+
+			ip2config.irq[i] = pdev->irq;
+		}
 #else
-			printk( KERN_ERR "IP2: PCI card specified but PCI support not\n");
-			printk( KERN_ERR "IP2: configured in this kernel.\n");
-			printk( KERN_ERR "IP2: Recompile kernel with CONFIG_PCI defined!\n");
+			printk(KERN_ERR "IP2: PCI card specified but PCI "
+					"support not enabled.\n");
+			printk(KERN_ERR "IP2: Recompile kernel with CONFIG_PCI "
+					"defined!\n");
 #endif /* CONFIG_PCI */
 			break;
 		case EISA:
-			if ( (ip2config.addr[i] = find_eisa_board( Eisa_slot + 1 )) != 0) {
+			ip2config.addr[i] = find_eisa_board(Eisa_slot + 1);
+			if (ip2config.addr[i] != 0) {
 				/* Eisa_irq set as side effect, boo */
 				ip2config.type[i] = EISA;
 			} 
@@ -634,31 +656,32 @@
 			break;
 		}	/* switch */
 	}	/* for */
-	if (pci_dev_i)
-		pci_dev_put(pci_dev_i);
+	pci_dev_put(pdev);
 
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-		if ( ip2config.addr[i] ) {
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
+		if (ip2config.addr[i]) {
 			pB = kzalloc(sizeof(i2eBordStr), GFP_KERNEL);
 			if (pB) {
 				i2BoardPtrTable[i] = pB;
-				iiSetAddress( pB, ip2config.addr[i], ii2DelayTimer );
-				iiReset( pB );
-			} else {
-				printk(KERN_ERR "IP2: board memory allocation error\n");
-			}
+				iiSetAddress(pB, ip2config.addr[i],
+						ii2DelayTimer);
+				iiReset(pB);
+			} else
+				printk(KERN_ERR "IP2: board memory allocation "
+						"error\n");
 		}
 	}
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-		if ( ( pB = i2BoardPtrTable[i] ) != NULL ) {
-			iiResetDelay( pB );
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
+		pB = i2BoardPtrTable[i];
+		if (pB != NULL) {
+			iiResetDelay(pB);
 			break;
 		}
 	}
-	for ( i = 0; i < IP2_MAX_BOARDS; ++i ) {
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
 		/* We don't want to request the firmware unless we have at
 		   least one board */
-		if ( i2BoardPtrTable[i] != NULL ) {
+		if (i2BoardPtrTable[i] != NULL) {
 			if (!fw)
 				fw = ip2_request_firmware();
 			if (!fw)
@@ -669,7 +692,7 @@
 	if (fw)
 		release_firmware(fw);
 
-	ip2trace (ITRC_NO_PORT, ITRC_INIT, 2, 0 );
+	ip2trace(ITRC_NO_PORT, ITRC_INIT, 2, 0);
 
 	ip2_tty_driver->owner		    = THIS_MODULE;
 	ip2_tty_driver->name                 = "ttyF";
@@ -680,20 +703,23 @@
 	ip2_tty_driver->subtype              = SERIAL_TYPE_NORMAL;
 	ip2_tty_driver->init_termios         = tty_std_termios;
 	ip2_tty_driver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
-	ip2_tty_driver->flags                = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+	ip2_tty_driver->flags                = TTY_DRIVER_REAL_RAW |
+		TTY_DRIVER_DYNAMIC_DEV;
 	tty_set_operations(ip2_tty_driver, &ip2_ops);
 
-	ip2trace (ITRC_NO_PORT, ITRC_INIT, 3, 0 );
+	ip2trace(ITRC_NO_PORT, ITRC_INIT, 3, 0);
 
-	/* Register the tty devices. */
-	if ( ( err = tty_register_driver ( ip2_tty_driver ) ) ) {
-		printk(KERN_ERR "IP2: failed to register tty driver (%d)\n", err);
+	err = tty_register_driver(ip2_tty_driver);
+	if (err) {
+		printk(KERN_ERR "IP2: failed to register tty driver\n");
 		put_tty_driver(ip2_tty_driver);
-		return -EINVAL;
-	} else
-	/* Register the IPL driver. */
-	if ( ( err = register_chrdev ( IP2_IPL_MAJOR, pcIpl, &ip2_ipl ) ) ) {
-		printk(KERN_ERR "IP2: failed to register IPL device (%d)\n", err );
+		return err; /* leaking resources */
+	}
+
+	err = register_chrdev(IP2_IPL_MAJOR, pcIpl, &ip2_ipl);
+	if (err) {
+		printk(KERN_ERR "IP2: failed to register IPL device (%d)\n",
+				err);
 	} else {
 		/* create the sysfs class */
 		ip2_class = class_create(THIS_MODULE, "ip2");
@@ -705,84 +731,86 @@
 	/* Register the read_procmem thing */
 	if (!proc_create("ip2mem",0,NULL,&ip2mem_proc_fops)) {
 		printk(KERN_ERR "IP2: failed to register read_procmem\n");
-	} else {
+		return -EIO; /* leaking resources */
+	}
 
-	ip2trace (ITRC_NO_PORT, ITRC_INIT, 4, 0 );
-		/* Register the interrupt handler or poll handler, depending upon the
-		 * specified interrupt.
-		 */
+	ip2trace(ITRC_NO_PORT, ITRC_INIT, 4, 0);
+	/* Register the interrupt handler or poll handler, depending upon the
+	 * specified interrupt.
+	 */
 
-		for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-			if ( 0 == ip2config.addr[i] ) {
-				continue;
-			}
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
+		if (ip2config.addr[i] == 0)
+			continue;
 
-			if ( NULL != ( pB = i2BoardPtrTable[i] ) ) {
-				device_create_drvdata(ip2_class, NULL,
-						      MKDEV(IP2_IPL_MAJOR, 4 * i),
-						      NULL, "ipl%d", i);
-				device_create_drvdata(ip2_class, NULL,
-						      MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
-						      NULL, "stat%d", i);
+		pB = i2BoardPtrTable[i];
+		if (pB != NULL) {
+			device_create_drvdata(ip2_class, NULL,
+					      MKDEV(IP2_IPL_MAJOR, 4 * i),
+					      NULL, "ipl%d", i);
+			device_create_drvdata(ip2_class, NULL,
+					      MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
+					      NULL, "stat%d", i);
 
-			    for ( box = 0; box < ABS_MAX_BOXES; ++box )
-			    {
-			        for ( j = 0; j < ABS_BIGGEST_BOX; ++j )
-			        {
-				    if ( pB->i2eChannelMap[box] & (1 << j) )
-				    {
-				        tty_register_device(ip2_tty_driver,
-					    j + ABS_BIGGEST_BOX *
-						    (box+i*ABS_MAX_BOXES), NULL);
-			    	    }
-			        }
-			    }
-			}
-
-			if (poll_only) {
-//		Poll only forces driver to only use polling and
-//		to ignore the probed PCI or EISA interrupts.
-				ip2config.irq[i] = CIR_POLL;
-			}
-			if ( ip2config.irq[i] == CIR_POLL ) {
-retry:
-				if (!TimerOn) {
-					PollTimer.expires = POLL_TIMEOUT;
-					add_timer ( &PollTimer );
-					TimerOn = 1;
-					printk( KERN_INFO "IP2: polling\n");
-				}
-			} else {
-				if (have_requested_irq(ip2config.irq[i]))
-					continue;
-				rc = request_irq( ip2config.irq[i], ip2_interrupt,
-					IP2_SA_FLAGS | (ip2config.type[i] == PCI ? IRQF_SHARED : 0),
-					pcName, i2BoardPtrTable[i]);
-				if (rc) {
-					printk(KERN_ERR "IP2: an request_irq failed: error %d\n",rc);
-					ip2config.irq[i] = CIR_POLL;
-					printk( KERN_INFO "IP2: Polling %ld/sec.\n",
-							(POLL_TIMEOUT - jiffies));
-					goto retry;
-				} 
-				mark_requested_irq(ip2config.irq[i]);
-				/* Initialise the interrupt handler bottom half (aka slih). */
-			}
+			for (box = 0; box < ABS_MAX_BOXES; box++)
+				for (j = 0; j < ABS_BIGGEST_BOX; j++)
+					if (pB->i2eChannelMap[box] & (1 << j))
+						tty_register_device(
+							ip2_tty_driver,
+							j + ABS_BIGGEST_BOX *
+							(box+i*ABS_MAX_BOXES),
+							NULL);
 		}
-		for( i = 0; i < IP2_MAX_BOARDS; ++i ) {
-			if ( i2BoardPtrTable[i] ) {
-				set_irq( i, ip2config.irq[i] ); /* set and enable board interrupt */
+
+		if (poll_only) {
+			/* Poll only forces driver to only use polling and
+			   to ignore the probed PCI or EISA interrupts. */
+			ip2config.irq[i] = CIR_POLL;
+		}
+		if (ip2config.irq[i] == CIR_POLL) {
+retry:
+			if (!timer_pending(&PollTimer)) {
+				mod_timer(&PollTimer, POLL_TIMEOUT);
+				printk(KERN_INFO "IP2: polling\n");
 			}
+		} else {
+			if (have_requested_irq(ip2config.irq[i]))
+				continue;
+			rc = request_irq(ip2config.irq[i], ip2_interrupt,
+				IP2_SA_FLAGS |
+				(ip2config.type[i] == PCI ? IRQF_SHARED : 0),
+				pcName, i2BoardPtrTable[i]);
+			if (rc) {
+				printk(KERN_ERR "IP2: request_irq failed: "
+						"error %d\n", rc);
+				ip2config.irq[i] = CIR_POLL;
+				printk(KERN_INFO "IP2: Polling %ld/sec.\n",
+						(POLL_TIMEOUT - jiffies));
+				goto retry;
+			}
+			mark_requested_irq(ip2config.irq[i]);
+			/* Initialise the interrupt handler bottom half
+			 * (aka slih). */
 		}
 	}
-	ip2trace (ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0 );
-	goto out;
+
+	for (i = 0; i < IP2_MAX_BOARDS; ++i) {
+		if (i2BoardPtrTable[i]) {
+			/* set and enable board interrupt */
+			set_irq(i, ip2config.irq[i]);
+		}
+	}
+
+	ip2trace(ITRC_NO_PORT, ITRC_INIT, ITRC_RETURN, 0);
+
+	return 0;
 
 out_chrdev:
 	unregister_chrdev(IP2_IPL_MAJOR, "ip2");
-out:
+	/* unregister and put tty here */
 	return err;
 }
+module_init(ip2_loadmain);
 
 /******************************************************************************/
 /* Function:   ip2_init_board()                                               */
@@ -1199,9 +1227,8 @@
 {
 	int i;
 	i2eBordStrPtr  pB;
-	const int irq = 0;
 
-	ip2trace (ITRC_NO_PORT, ITRC_INTR, 99, 1, irq );
+	ip2trace(ITRC_NO_PORT, ITRC_INTR, 99, 1, 0);
 
 	/* Service just the boards on the list using this irq */
 	for( i = 0; i < i2nBoards; ++i ) {
@@ -1210,9 +1237,8 @@
 //		Only process those boards which match our IRQ.
 //			IRQ = 0 for polled boards, we won't poll "IRQ" boards
 
-		if ( pB && (pB->i2eUsingIrq == irq) ) {
+		if (pB && pB->i2eUsingIrq == 0)
 			ip2_irq_work(pB);
-		}
 	}
 
 	++irq_counter;
@@ -1250,16 +1276,12 @@
 {
 	ip2trace (ITRC_NO_PORT, ITRC_INTR, 100, 0 );
 
-	TimerOn = 0; // it's the truth but not checked in service
-
 	// Just polled boards, IRQ = 0 will hit all non-interrupt boards.
 	// It will NOT poll boards handled by hard interrupts.
 	// The issue of queued BH interrupts is handled in ip2_interrupt().
 	ip2_polled_interrupt();
 
-	PollTimer.expires = POLL_TIMEOUT;
-	add_timer( &PollTimer );
-	TimerOn = 1;
+	mod_timer(&PollTimer, POLL_TIMEOUT);
 
 	ip2trace (ITRC_NO_PORT, ITRC_INTR, ITRC_RETURN, 0 );
 }
@@ -2871,7 +2893,7 @@
 	case 13:
 		switch ( cmd ) {
 		case 64:	/* Driver - ip2stat */
-			rc = put_user(ip2_tty_driver->refcount, pIndex++ );
+			rc = put_user(-1, pIndex++ );
 			rc = put_user(irq_counter, pIndex++  );
 			rc = put_user(bh_counter, pIndex++  );
 			break;
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index 8f7cc19..7d30ee1 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -421,17 +421,16 @@
 	if (retries >= 100)
 		goto unlock;
 
+	tty = tty_port_tty_get(&port->port);
+	if (tty == NULL)
+		goto put_unlock;
+
 	for (; count > 0; count--, port++) {
 		/* port not active or tx disabled to force flow control */
 		if (!(port->port.flags & ASYNC_INITIALIZED) ||
 				!(port->status & ISI_TXOK))
 			continue;
 
-		tty = port->port.tty;
-
-		if (tty == NULL)
-			continue;
-
 		txcount = min_t(short, TX_SIZE, port->xmit_cnt);
 		if (txcount <= 0 || tty->stopped || tty->hw_stopped)
 			continue;
@@ -489,6 +488,8 @@
 			tty_wakeup(tty);
 	}
 
+put_unlock:
+	tty_kref_put(tty);
 unlock:
 	spin_unlock_irqrestore(&isi_card[card].card_lock, flags);
 	/*	schedule another tx for hopefully in about 10ms	*/
@@ -547,7 +548,7 @@
 		return IRQ_HANDLED;
 	}
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty == NULL) {
 		word_count = byte_count >> 1;
 		while (byte_count > 1) {
@@ -588,7 +589,7 @@
 			}
 
 			if (port->port.flags & ASYNC_CTS_FLOW) {
-				if (port->port.tty->hw_stopped) {
+				if (tty->hw_stopped) {
 					if (header & ISI_CTS) {
 						port->port.tty->hw_stopped = 0;
 						/* start tx ing */
@@ -597,7 +598,7 @@
 						tty_wakeup(tty);
 					}
 				} else if (!(header & ISI_CTS)) {
-					port->port.tty->hw_stopped = 1;
+					tty->hw_stopped = 1;
 					/* stop tx ing */
 					port->status &= ~(ISI_TXOK | ISI_CTS);
 				}
@@ -660,24 +661,21 @@
 	}
 	outw(0x0000, base+0x04); /* enable interrupts */
 	spin_unlock(&card->card_lock);
+	tty_kref_put(tty);
 
 	return IRQ_HANDLED;
 }
 
-static void isicom_config_port(struct isi_port *port)
+static void isicom_config_port(struct tty_struct *tty)
 {
+	struct isi_port *port = tty->driver_data;
 	struct isi_board *card = port->card;
-	struct tty_struct *tty;
 	unsigned long baud;
 	unsigned long base = card->base;
 	u16 channel_setup, channel = port->channel,
 		shift_count = card->shift_count;
 	unsigned char flow_ctrl;
 
-	tty = port->port.tty;
-
-	if (tty == NULL)
-		return;
 	/* FIXME: Switch to new tty baud API */
 	baud = C_BAUD(tty);
 	if (baud & CBAUDEX) {
@@ -690,7 +688,7 @@
 
 		/* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */
 		if (baud < 1 || baud > 4)
-			port->port.tty->termios->c_cflag &= ~CBAUDEX;
+			tty->termios->c_cflag &= ~CBAUDEX;
 		else
 			baud += 15;
 	}
@@ -797,8 +795,9 @@
 	spin_unlock_irqrestore(&bp->card_lock, flags);
 }
 
-static int isicom_setup_port(struct isi_port *port)
+static int isicom_setup_port(struct tty_struct *tty)
 {
+	struct isi_port *port = tty->driver_data;
 	struct isi_board *card = port->card;
 	unsigned long flags;
 
@@ -808,8 +807,7 @@
 		return -ENOMEM;
 
 	spin_lock_irqsave(&card->card_lock, flags);
-	if (port->port.tty)
-		clear_bit(TTY_IO_ERROR, &port->port.tty->flags);
+	clear_bit(TTY_IO_ERROR, &tty->flags);
 	if (port->port.count == 1)
 		card->count++;
 
@@ -823,7 +821,7 @@
 		InterruptTheCard(card->base);
 	}
 
-	isicom_config_port(port);
+	isicom_config_port(tty);
 	port->port.flags |= ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&card->card_lock, flags);
 
@@ -934,8 +932,8 @@
 
 	port->port.count++;
 	tty->driver_data = port;
-	port->port.tty = tty;
-	error = isicom_setup_port(port);
+	tty_port_tty_set(&port->port, tty);
+	error = isicom_setup_port(tty);
 	if (error == 0)
 		error = block_til_ready(tty, filp, port);
 	return error;
@@ -955,15 +953,17 @@
 	struct isi_board *card = port->card;
 	struct tty_struct *tty;
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 
-	if (!(port->port.flags & ASYNC_INITIALIZED))
+	if (!(port->port.flags & ASYNC_INITIALIZED)) {
+		tty_kref_put(tty);
 		return;
+	}
 
 	tty_port_free_xmit_buf(&port->port);
 	port->port.flags &= ~ASYNC_INITIALIZED;
 	/* 3rd October 2000 : Vinayak P Risbud */
-	port->port.tty = NULL;
+	tty_port_tty_set(&port->port, NULL);
 
 	/*Fix done by Anil .S on 30-04-2001
 	remote login through isi port has dtr toggle problem
@@ -1243,9 +1243,10 @@
 	return 0;
 }
 
-static int isicom_set_serial_info(struct isi_port *port,
-	struct serial_struct __user *info)
+static int isicom_set_serial_info(struct tty_struct *tty,
+					struct serial_struct __user *info)
 {
+	struct isi_port *port = tty->driver_data;
 	struct serial_struct newinfo;
 	int reconfig_port;
 
@@ -1276,7 +1277,7 @@
 	if (reconfig_port) {
 		unsigned long flags;
 		spin_lock_irqsave(&port->card->card_lock, flags);
-		isicom_config_port(port);
+		isicom_config_port(tty);
 		spin_unlock_irqrestore(&port->card->card_lock, flags);
 	}
 	unlock_kernel();
@@ -1318,7 +1319,7 @@
 		return isicom_get_serial_info(port, argp);
 
 	case TIOCSSERIAL:
-		return isicom_set_serial_info(port, argp);
+		return isicom_set_serial_info(tty, argp);
 
 	default:
 		return -ENOIOCTLCMD;
@@ -1341,7 +1342,7 @@
 		return;
 
 	spin_lock_irqsave(&port->card->card_lock, flags);
-	isicom_config_port(port);
+	isicom_config_port(tty);
 	spin_unlock_irqrestore(&port->card->card_lock, flags);
 
 	if ((old_termios->c_cflag & CRTSCTS) &&
@@ -1419,7 +1420,7 @@
 
 	port->port.count = 0;
 	port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	port->port.tty = NULL;
+	tty_port_tty_set(&port->port, NULL);
 	wake_up_interruptible(&port->port.open_wait);
 }
 
diff --git a/drivers/char/istallion.c b/drivers/char/istallion.c
index 843a2af..505d7a1 100644
--- a/drivers/char/istallion.c
+++ b/drivers/char/istallion.c
@@ -623,24 +623,25 @@
 static void	stli_brdpoll(struct stlibrd *brdp, cdkhdr_t __iomem *hdrp);
 static void	stli_poll(unsigned long arg);
 static int	stli_hostcmd(struct stlibrd *brdp, struct stliport *portp);
-static int	stli_initopen(struct stlibrd *brdp, struct stliport *portp);
+static int	stli_initopen(struct tty_struct *tty, struct stlibrd *brdp, struct stliport *portp);
 static int	stli_rawopen(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
 static int	stli_rawclose(struct stlibrd *brdp, struct stliport *portp, unsigned long arg, int wait);
-static int	stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp);
-static int	stli_setport(struct stliport *portp);
+static int	stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp,
+				struct stliport *portp, struct file *filp);
+static int	stli_setport(struct tty_struct *tty);
 static int	stli_cmdwait(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
 static void	stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
 static void	__stli_sendcmd(struct stlibrd *brdp, struct stliport *portp, unsigned long cmd, void *arg, int size, int copyback);
 static void	stli_dodelaycmd(struct stliport *portp, cdkctrl_t __iomem *cp);
-static void	stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp);
+static void	stli_mkasyport(struct tty_struct *tty, struct stliport *portp, asyport_t *pp, struct ktermios *tiosp);
 static void	stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
 static long	stli_mktiocm(unsigned long sigvalue);
 static void	stli_read(struct stlibrd *brdp, struct stliport *portp);
 static int	stli_getserial(struct stliport *portp, struct serial_struct __user *sp);
-static int	stli_setserial(struct stliport *portp, struct serial_struct __user *sp);
+static int	stli_setserial(struct tty_struct *tty, struct serial_struct __user *sp);
 static int	stli_getbrdstats(combrd_t __user *bp);
-static int	stli_getportstats(struct stliport *portp, comstats_t __user *cp);
-static int	stli_portcmdstats(struct stliport *portp);
+static int	stli_getportstats(struct tty_struct *tty, struct stliport *portp, comstats_t __user *cp);
+static int	stli_portcmdstats(struct tty_struct *tty, struct stliport *portp);
 static int	stli_clrportstats(struct stliport *portp, comstats_t __user *cp);
 static int	stli_getportstruct(struct stliport __user *arg);
 static int	stli_getbrdstruct(struct stlibrd __user *arg);
@@ -731,12 +732,16 @@
 {
 	struct stliport *portp;
 	unsigned int j;
+	struct tty_struct *tty;
 
 	for (j = 0; j < STL_MAXPORTS; j++) {
 		portp = brdp->ports[j];
 		if (portp != NULL) {
-			if (portp->port.tty != NULL)
-				tty_hangup(portp->port.tty);
+			tty = tty_port_tty_get(&portp->port);
+			if (tty != NULL) {
+				tty_hangup(tty);
+				tty_kref_put(tty);
+			}
 			kfree(portp);
 		}
 	}
@@ -824,7 +829,7 @@
  *	requires several commands to the board we will need to wait for any
  *	other open that is already initializing the port.
  */
-	portp->port.tty = tty;
+	tty_port_tty_set(&portp->port, tty);
 	tty->driver_data = portp;
 	portp->port.count++;
 
@@ -835,7 +840,7 @@
 
 	if ((portp->port.flags & ASYNC_INITIALIZED) == 0) {
 		set_bit(ST_INITIALIZING, &portp->state);
-		if ((rc = stli_initopen(brdp, portp)) >= 0) {
+		if ((rc = stli_initopen(tty, brdp, portp)) >= 0) {
 			portp->port.flags |= ASYNC_INITIALIZED;
 			clear_bit(TTY_IO_ERROR, &tty->flags);
 		}
@@ -864,7 +869,7 @@
  *	then also we might have to wait for carrier.
  */
 	if (!(filp->f_flags & O_NONBLOCK)) {
-		if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
+		if ((rc = stli_waitcarrier(tty, brdp, portp, filp)) != 0)
 			return rc;
 	}
 	portp->port.flags |= ASYNC_NORMAL_ACTIVE;
@@ -930,7 +935,7 @@
 	stli_flushbuffer(tty);
 
 	tty->closing = 0;
-	portp->port.tty = NULL;
+	tty_port_tty_set(&portp->port, NULL);
 
 	if (portp->openwaitcnt) {
 		if (portp->close_delay)
@@ -952,9 +957,9 @@
  *	this still all happens pretty quickly.
  */
 
-static int stli_initopen(struct stlibrd *brdp, struct stliport *portp)
+static int stli_initopen(struct tty_struct *tty,
+				struct stlibrd *brdp, struct stliport *portp)
 {
-	struct tty_struct *tty;
 	asynotify_t nt;
 	asyport_t aport;
 	int rc;
@@ -969,10 +974,7 @@
 	    sizeof(asynotify_t), 0)) < 0)
 		return rc;
 
-	tty = portp->port.tty;
-	if (tty == NULL)
-		return -ENODEV;
-	stli_mkasyport(portp, &aport, tty->termios);
+	stli_mkasyport(tty, portp, &aport, tty->termios);
 	if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport,
 	    sizeof(asyport_t), 0)) < 0)
 		return rc;
@@ -1161,22 +1163,21 @@
  *	waiting for the command to complete - so must have user context.
  */
 
-static int stli_setport(struct stliport *portp)
+static int stli_setport(struct tty_struct *tty)
 {
+	struct stliport *portp = tty->driver_data;
 	struct stlibrd *brdp;
 	asyport_t aport;
 
 	if (portp == NULL)
 		return -ENODEV;
-	if (portp->port.tty == NULL)
-		return -ENODEV;
 	if (portp->brdnr >= stli_nrbrds)
 		return -ENODEV;
 	brdp = stli_brds[portp->brdnr];
 	if (brdp == NULL)
 		return -ENODEV;
 
-	stli_mkasyport(portp, &aport, portp->port.tty->termios);
+	stli_mkasyport(tty, portp, &aport, tty->termios);
 	return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
 }
 
@@ -1187,7 +1188,8 @@
  *	maybe because if we are clocal then we don't need to wait...
  */
 
-static int stli_waitcarrier(struct stlibrd *brdp, struct stliport *portp, struct file *filp)
+static int stli_waitcarrier(struct tty_struct *tty, struct stlibrd *brdp,
+				struct stliport *portp, struct file *filp)
 {
 	unsigned long flags;
 	int rc, doclocal;
@@ -1195,7 +1197,7 @@
 	rc = 0;
 	doclocal = 0;
 
-	if (portp->port.tty->termios->c_cflag & CLOCAL)
+	if (tty->termios->c_cflag & CLOCAL)
 		doclocal++;
 
 	spin_lock_irqsave(&stli_lock, flags);
@@ -1373,8 +1375,6 @@
 	stli_txcookrealsize = 0;
 	stli_txcooktty = NULL;
 
-	if (tty == NULL)
-		return;
 	if (cooktty == NULL)
 		return;
 	if (tty != cooktty)
@@ -1572,10 +1572,11 @@
  *	just quietly ignore any requests to change irq, etc.
  */
 
-static int stli_setserial(struct stliport *portp, struct serial_struct __user *sp)
+static int stli_setserial(struct tty_struct *tty, struct serial_struct __user *sp)
 {
 	struct serial_struct sio;
 	int rc;
+	struct stliport *portp = tty->driver_data;
 
 	if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
 		return -EFAULT;
@@ -1594,7 +1595,7 @@
 	portp->closing_wait = sio.closing_wait;
 	portp->custom_divisor = sio.custom_divisor;
 
-	if ((rc = stli_setport(portp)) < 0)
+	if ((rc = stli_setport(tty)) < 0)
 		return rc;
 	return 0;
 }
@@ -1685,17 +1686,17 @@
 		rc = stli_getserial(portp, argp);
 		break;
 	case TIOCSSERIAL:
-		rc = stli_setserial(portp, argp);
+		rc = stli_setserial(tty, argp);
 		break;
 	case STL_GETPFLAG:
 		rc = put_user(portp->pflag, (unsigned __user *)argp);
 		break;
 	case STL_SETPFLAG:
 		if ((rc = get_user(portp->pflag, (unsigned __user *)argp)) == 0)
-			stli_setport(portp);
+			stli_setport(tty);
 		break;
 	case COM_GETPORTSTATS:
-		rc = stli_getportstats(portp, argp);
+		rc = stli_getportstats(tty, portp, argp);
 		break;
 	case COM_CLRPORTSTATS:
 		rc = stli_clrportstats(portp, argp);
@@ -1729,8 +1730,6 @@
 	struct ktermios *tiosp;
 	asyport_t aport;
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1742,7 +1741,7 @@
 
 	tiosp = tty->termios;
 
-	stli_mkasyport(portp, &aport, tiosp);
+	stli_mkasyport(tty, portp, &aport, tiosp);
 	stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
 	stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
 	stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig,
@@ -1854,7 +1853,7 @@
 	clear_bit(ST_TXBUSY, &portp->state);
 	clear_bit(ST_RXSTOP, &portp->state);
 	set_bit(TTY_IO_ERROR, &tty->flags);
-	portp->port.tty = NULL;
+	tty_port_tty_set(&portp->port, NULL);
 	portp->port.flags &= ~ASYNC_NORMAL_ACTIVE;
 	portp->port.count = 0;
 	spin_unlock_irqrestore(&stli_lock, flags);
@@ -1935,8 +1934,6 @@
 	struct stliport *portp;
 	unsigned long tend;
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1998,7 +1995,7 @@
 	char *sp, *uart;
 	int rc, cnt;
 
-	rc = stli_portcmdstats(portp);
+	rc = stli_portcmdstats(NULL, portp);
 
 	uart = "UNKNOWN";
 	if (brdp->state & BST_STARTED) {
@@ -2188,7 +2185,7 @@
 
 	if (test_bit(ST_RXSTOP, &portp->state))
 		return;
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	if (tty == NULL)
 		return;
 
@@ -2230,6 +2227,7 @@
 		set_bit(ST_RXING, &portp->state);
 
 	tty_schedule_flip(tty);
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
@@ -2362,7 +2360,7 @@
 	if (ap->notify) {
 		nt = ap->changed;
 		ap->notify = 0;
-		tty = portp->port.tty;
+		tty = tty_port_tty_get(&portp->port);
 
 		if (nt.signal & SG_DCD) {
 			oldsigs = portp->sigs;
@@ -2399,6 +2397,7 @@
 				tty_schedule_flip(tty);
 			}
 		}
+		tty_kref_put(tty);
 
 		if (nt.data & DT_RXBUSY) {
 			donerx++;
@@ -2535,14 +2534,15 @@
  *	the slave.
  */
 
-static void stli_mkasyport(struct stliport *portp, asyport_t *pp, struct ktermios *tiosp)
+static void stli_mkasyport(struct tty_struct *tty, struct stliport *portp,
+				asyport_t *pp, struct ktermios *tiosp)
 {
 	memset(pp, 0, sizeof(asyport_t));
 
 /*
  *	Start of by setting the baud, char size, parity and stop bit info.
  */
-	pp->baudout = tty_get_baud_rate(portp->port.tty);
+	pp->baudout = tty_get_baud_rate(tty);
 	if ((tiosp->c_cflag & CBAUD) == B38400) {
 		if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
 			pp->baudout = 57600;
@@ -2695,7 +2695,7 @@
 			printk("STALLION: failed to allocate port structure\n");
 			continue;
 		}
-
+		tty_port_init(&portp->port);
 		portp->magic = STLI_PORTMAGIC;
 		portp->portnr = i;
 		portp->brdnr = brdp->brdnr;
@@ -4220,7 +4220,7 @@
  *	what port to get stats for (used through board control device).
  */
 
-static int stli_portcmdstats(struct stliport *portp)
+static int stli_portcmdstats(struct tty_struct *tty, struct stliport *portp)
 {
 	unsigned long	flags;
 	struct stlibrd	*brdp;
@@ -4249,15 +4249,15 @@
 	stli_comstats.flags = portp->port.flags;
 
 	spin_lock_irqsave(&brd_lock, flags);
-	if (portp->port.tty != NULL) {
-		if (portp->port.tty->driver_data == portp) {
-			stli_comstats.ttystate = portp->port.tty->flags;
+	if (tty != NULL) {
+		if (portp->port.tty == tty) {
+			stli_comstats.ttystate = tty->flags;
 			stli_comstats.rxbuffered = -1;
-			if (portp->port.tty->termios != NULL) {
-				stli_comstats.cflags = portp->port.tty->termios->c_cflag;
-				stli_comstats.iflags = portp->port.tty->termios->c_iflag;
-				stli_comstats.oflags = portp->port.tty->termios->c_oflag;
-				stli_comstats.lflags = portp->port.tty->termios->c_lflag;
+			if (tty->termios != NULL) {
+				stli_comstats.cflags = tty->termios->c_cflag;
+				stli_comstats.iflags = tty->termios->c_iflag;
+				stli_comstats.oflags = tty->termios->c_oflag;
+				stli_comstats.lflags = tty->termios->c_lflag;
 			}
 		}
 	}
@@ -4294,7 +4294,8 @@
  *	what port to get stats for (used through board control device).
  */
 
-static int stli_getportstats(struct stliport *portp, comstats_t __user *cp)
+static int stli_getportstats(struct tty_struct *tty, struct stliport *portp,
+							comstats_t __user *cp)
 {
 	struct stlibrd *brdp;
 	int rc;
@@ -4312,7 +4313,7 @@
 	if (!brdp)
 		return -ENODEV;
 
-	if ((rc = stli_portcmdstats(portp)) < 0)
+	if ((rc = stli_portcmdstats(tty, portp)) < 0)
 		return rc;
 
 	return copy_to_user(cp, &stli_comstats, sizeof(comstats_t)) ?
@@ -4427,7 +4428,7 @@
 
 	switch (cmd) {
 	case COM_GETPORTSTATS:
-		rc = stli_getportstats(NULL, argp);
+		rc = stli_getportstats(NULL, NULL, argp);
 		done++;
 		break;
 	case COM_CLRPORTSTATS:
diff --git a/drivers/char/moxa.c b/drivers/char/moxa.c
index d3d7864e..5df4003 100644
--- a/drivers/char/moxa.c
+++ b/drivers/char/moxa.c
@@ -205,7 +205,7 @@
 static void moxa_poll(unsigned long);
 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
 static void moxa_setup_empty_event(struct tty_struct *);
-static void moxa_shut_down(struct moxa_port *);
+static void moxa_shut_down(struct tty_struct *);
 /*
  * moxa board interface functions:
  */
@@ -217,7 +217,7 @@
 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
 static int MoxaPortLineStatus(struct moxa_port *);
 static void MoxaPortFlushData(struct moxa_port *, int);
-static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
+static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
 static int MoxaPortReadData(struct moxa_port *);
 static int MoxaPortTxQueue(struct moxa_port *);
 static int MoxaPortRxQueue(struct moxa_port *);
@@ -332,6 +332,7 @@
 		for (i = 0; i < MAX_BOARDS; i++) {
 			p = moxa_boards[i].ports;
 			for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
+				struct tty_struct *ttyp;
 				memset(&tmp, 0, sizeof(tmp));
 				if (!moxa_boards[i].ready)
 					goto copy;
@@ -344,10 +345,12 @@
 				if (status & 4)
 					tmp.dcd = 1;
 
-				if (!p->port.tty || !p->port.tty->termios)
+				ttyp = tty_port_tty_get(&p->port);
+				if (!ttyp || !ttyp->termios)
 					tmp.cflag = p->cflag;
 				else
-					tmp.cflag = p->port.tty->termios->c_cflag;
+					tmp.cflag = ttyp->termios->c_cflag;
+				tty_kref_put(tty);
 copy:
 				if (copy_to_user(argm, &tmp, sizeof(tmp))) {
 					mutex_unlock(&moxa_openlock);
@@ -880,8 +883,14 @@
 
 	/* pci hot-un-plug support */
 	for (a = 0; a < brd->numPorts; a++)
-		if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
-			tty_hangup(brd->ports[a].port.tty);
+		if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
+			struct tty_struct *tty = tty_port_tty_get(
+						&brd->ports[a].port);
+			if (tty) {
+				tty_hangup(tty);
+				tty_kref_put(tty);
+			}
+		}
 	while (1) {
 		opened = 0;
 		for (a = 0; a < brd->numPorts; a++)
@@ -1096,13 +1105,14 @@
 module_init(moxa_init);
 module_exit(moxa_exit);
 
-static void moxa_close_port(struct moxa_port *ch)
+static void moxa_close_port(struct tty_struct *tty)
 {
-	moxa_shut_down(ch);
+	struct moxa_port *ch = tty->driver_data;
+	moxa_shut_down(tty);
 	MoxaPortFlushData(ch, 2);
 	ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	ch->port.tty->driver_data = NULL;
-	ch->port.tty = NULL;
+	tty->driver_data = NULL;
+	tty_port_tty_set(&ch->port, NULL);
 }
 
 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
@@ -1161,7 +1171,7 @@
 	ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
 	ch->port.count++;
 	tty->driver_data = ch;
-	ch->port.tty = tty;
+	tty_port_tty_set(&ch->port, tty);
 	if (!(ch->port.flags & ASYNC_INITIALIZED)) {
 		ch->statusflags = 0;
 		moxa_set_tty_param(tty, tty->termios);
@@ -1179,7 +1189,7 @@
 	if (retval) {
 		if (ch->port.count) /* 0 means already hung up... */
 			if (--ch->port.count == 0)
-				moxa_close_port(ch);
+				moxa_close_port(tty);
 	} else
 		ch->port.flags |= ASYNC_NORMAL_ACTIVE;
 	mutex_unlock(&moxa_openlock);
@@ -1219,7 +1229,7 @@
 		tty_wait_until_sent(tty, 30 * HZ);	/* 30 seconds timeout */
 	}
 
-	moxa_close_port(ch);
+	moxa_close_port(tty);
 unlock:
 	mutex_unlock(&moxa_openlock);
 }
@@ -1234,7 +1244,7 @@
 		return 0;
 
 	spin_lock_bh(&moxa_lock);
-	len = MoxaPortWriteData(ch, buf, count);
+	len = MoxaPortWriteData(tty, buf, count);
 	spin_unlock_bh(&moxa_lock);
 
 	ch->statusflags |= LOWWAIT;
@@ -1409,7 +1419,7 @@
 		return;
 	}
 	ch->port.count = 0;
-	moxa_close_port(ch);
+	moxa_close_port(tty);
 	mutex_unlock(&moxa_openlock);
 
 	wake_up_interruptible(&ch->port.open_wait);
@@ -1417,11 +1427,14 @@
 
 static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
 {
+	struct tty_struct *tty;
 	dcd = !!dcd;
 
-	if (dcd != p->DCDState && p->port.tty && C_CLOCAL(p->port.tty)) {
-		if (!dcd)
-			tty_hangup(p->port.tty);
+	if (dcd != p->DCDState) {
+		tty = tty_port_tty_get(&p->port);
+		if (tty && C_CLOCAL(tty) && !dcd)
+			tty_hangup(tty);
+		tty_kref_put(tty);
 	}
 	p->DCDState = dcd;
 }
@@ -1429,7 +1442,7 @@
 static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
 		u16 __iomem *ip)
 {
-	struct tty_struct *tty = p->port.tty;
+	struct tty_struct *tty = tty_port_tty_get(&p->port);
 	void __iomem *ofsAddr;
 	unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
 	u16 intr;
@@ -1476,6 +1489,7 @@
 		tty_insert_flip_char(tty, 0, TTY_BREAK);
 		tty_schedule_flip(tty);
 	}
+	tty_kref_put(tty);
 
 	if (intr & IntrLine)
 		moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
@@ -1560,9 +1574,9 @@
 	spin_unlock_bh(&moxa_lock);
 }
 
-static void moxa_shut_down(struct moxa_port *ch)
+static void moxa_shut_down(struct tty_struct *tty)
 {
-	struct tty_struct *tp = ch->port.tty;
+	struct moxa_port *ch = tty->driver_data;
 
 	if (!(ch->port.flags & ASYNC_INITIALIZED))
 		return;
@@ -1572,7 +1586,7 @@
 	/*
 	 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
 	 */
-	if (C_HUPCL(tp))
+	if (C_HUPCL(tty))
 		MoxaPortLineCtrl(ch, 0, 0);
 
 	spin_lock_bh(&moxa_lock);
@@ -1953,9 +1967,10 @@
 	return val;
 }
 
-static int MoxaPortWriteData(struct moxa_port *port,
+static int MoxaPortWriteData(struct tty_struct *tty,
 		const unsigned char *buffer, int len)
 {
+	struct moxa_port *port = tty->driver_data;
 	void __iomem *baseAddr, *ofsAddr, *ofs;
 	unsigned int c, total;
 	u16 head, tail, tx_mask, spage, epage;
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
index b638403..8beef50 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -610,15 +610,13 @@
 	return 0;
 }
 
-static int mxser_set_baud(struct mxser_port *info, long newspd)
+static int mxser_set_baud(struct tty_struct *tty, long newspd)
 {
+	struct mxser_port *info = tty->driver_data;
 	int quot = 0, baud;
 	unsigned char cval;
 
-	if (!info->port.tty || !info->port.tty->termios)
-		return -1;
-
-	if (!(info->ioaddr))
+	if (!info->ioaddr)
 		return -1;
 
 	if (newspd > info->max_baud)
@@ -626,13 +624,13 @@
 
 	if (newspd == 134) {
 		quot = 2 * info->baud_base / 269;
-		tty_encode_baud_rate(info->port.tty, 134, 134);
+		tty_encode_baud_rate(tty, 134, 134);
 	} else if (newspd) {
 		quot = info->baud_base / newspd;
 		if (quot == 0)
 			quot = 1;
 		baud = info->baud_base/quot;
-		tty_encode_baud_rate(info->port.tty, baud, baud);
+		tty_encode_baud_rate(tty, baud, baud);
 	} else {
 		quot = 0;
 	}
@@ -658,7 +656,7 @@
 	outb(cval, info->ioaddr + UART_LCR);	/* reset DLAB */
 
 #ifdef BOTHER
-	if (C_BAUD(info->port.tty) == BOTHER) {
+	if (C_BAUD(tty) == BOTHER) {
 		quot = info->baud_base % newspd;
 		quot *= 8;
 		if (quot % newspd > newspd / 2) {
@@ -679,21 +677,20 @@
  * This routine is called to set the UART divisor registers to match
  * the specified baud rate for a serial port.
  */
-static int mxser_change_speed(struct mxser_port *info,
-		struct ktermios *old_termios)
+static int mxser_change_speed(struct tty_struct *tty,
+					struct ktermios *old_termios)
 {
+	struct mxser_port *info = tty->driver_data;
 	unsigned cflag, cval, fcr;
 	int ret = 0;
 	unsigned char status;
 
-	if (!info->port.tty || !info->port.tty->termios)
-		return ret;
-	cflag = info->port.tty->termios->c_cflag;
-	if (!(info->ioaddr))
+	cflag = tty->termios->c_cflag;
+	if (!info->ioaddr)
 		return ret;
 
-	if (mxser_set_baud_method[info->port.tty->index] == 0)
-		mxser_set_baud(info, tty_get_baud_rate(info->port.tty));
+	if (mxser_set_baud_method[tty->index] == 0)
+		mxser_set_baud(tty, tty_get_baud_rate(tty));
 
 	/* byte size and parity */
 	switch (cflag & CSIZE) {
@@ -762,9 +759,9 @@
 			info->MCR |= UART_MCR_AFE;
 		} else {
 			status = inb(info->ioaddr + UART_MSR);
-			if (info->port.tty->hw_stopped) {
+			if (tty->hw_stopped) {
 				if (status & UART_MSR_CTS) {
-					info->port.tty->hw_stopped = 0;
+					tty->hw_stopped = 0;
 					if (info->type != PORT_16550A &&
 							!info->board->chip_flag) {
 						outb(info->IER & ~UART_IER_THRI,
@@ -774,11 +771,11 @@
 						outb(info->IER, info->ioaddr +
 								UART_IER);
 					}
-					tty_wakeup(info->port.tty);
+					tty_wakeup(tty);
 				}
 			} else {
 				if (!(status & UART_MSR_CTS)) {
-					info->port.tty->hw_stopped = 1;
+					tty->hw_stopped = 1;
 					if ((info->type != PORT_16550A) &&
 							(!info->board->chip_flag)) {
 						info->IER &= ~UART_IER_THRI;
@@ -804,21 +801,21 @@
 	 * Set up parity check flag
 	 */
 	info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
-	if (I_INPCK(info->port.tty))
+	if (I_INPCK(tty))
 		info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
-	if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
+	if (I_BRKINT(tty) || I_PARMRK(tty))
 		info->read_status_mask |= UART_LSR_BI;
 
 	info->ignore_status_mask = 0;
 
-	if (I_IGNBRK(info->port.tty)) {
+	if (I_IGNBRK(tty)) {
 		info->ignore_status_mask |= UART_LSR_BI;
 		info->read_status_mask |= UART_LSR_BI;
 		/*
 		 * If we're ignore parity and break indicators, ignore
 		 * overruns too.  (For real raw support).
 		 */
-		if (I_IGNPAR(info->port.tty)) {
+		if (I_IGNPAR(tty)) {
 			info->ignore_status_mask |=
 						UART_LSR_OE |
 						UART_LSR_PE |
@@ -830,16 +827,16 @@
 		}
 	}
 	if (info->board->chip_flag) {
-		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->port.tty));
-		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->port.tty));
-		if (I_IXON(info->port.tty)) {
+		mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
+		mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
+		if (I_IXON(tty)) {
 			mxser_enable_must_rx_software_flow_control(
 					info->ioaddr);
 		} else {
 			mxser_disable_must_rx_software_flow_control(
 					info->ioaddr);
 		}
-		if (I_IXOFF(info->port.tty)) {
+		if (I_IXOFF(tty)) {
 			mxser_enable_must_tx_software_flow_control(
 					info->ioaddr);
 		} else {
@@ -855,7 +852,8 @@
 	return ret;
 }
 
-static void mxser_check_modem_status(struct mxser_port *port, int status)
+static void mxser_check_modem_status(struct tty_struct *tty,
+				struct mxser_port *port, int status)
 {
 	/* update input line counters */
 	if (status & UART_MSR_TERI)
@@ -874,10 +872,11 @@
 			wake_up_interruptible(&port->port.open_wait);
 	}
 
+	tty = tty_port_tty_get(&port->port);
 	if (port->port.flags & ASYNC_CTS_FLOW) {
-		if (port->port.tty->hw_stopped) {
+		if (tty->hw_stopped) {
 			if (status & UART_MSR_CTS) {
-				port->port.tty->hw_stopped = 0;
+				tty->hw_stopped = 0;
 
 				if ((port->type != PORT_16550A) &&
 						(!port->board->chip_flag)) {
@@ -887,11 +886,11 @@
 					outb(port->IER, port->ioaddr +
 							UART_IER);
 				}
-				tty_wakeup(port->port.tty);
+				tty_wakeup(tty);
 			}
 		} else {
 			if (!(status & UART_MSR_CTS)) {
-				port->port.tty->hw_stopped = 1;
+				tty->hw_stopped = 1;
 				if (port->type != PORT_16550A &&
 						!port->board->chip_flag) {
 					port->IER &= ~UART_IER_THRI;
@@ -903,8 +902,9 @@
 	}
 }
 
-static int mxser_startup(struct mxser_port *info)
+static int mxser_startup(struct tty_struct *tty)
 {
+	struct mxser_port *info = tty->driver_data;
 	unsigned long page;
 	unsigned long flags;
 
@@ -921,8 +921,7 @@
 	}
 
 	if (!info->ioaddr || !info->type) {
-		if (info->port.tty)
-			set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+		set_bit(TTY_IO_ERROR, &tty->flags);
 		free_page(page);
 		spin_unlock_irqrestore(&info->slock, flags);
 		return 0;
@@ -952,8 +951,8 @@
 	if (inb(info->ioaddr + UART_LSR) == 0xff) {
 		spin_unlock_irqrestore(&info->slock, flags);
 		if (capable(CAP_SYS_ADMIN)) {
-			if (info->port.tty)
-				set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+			if (tty)
+				set_bit(TTY_IO_ERROR, &tty->flags);
 			return 0;
 		} else
 			return -ENODEV;
@@ -991,14 +990,13 @@
 	(void) inb(info->ioaddr + UART_IIR);
 	(void) inb(info->ioaddr + UART_MSR);
 
-	if (info->port.tty)
-		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
+	clear_bit(TTY_IO_ERROR, &tty->flags);
 	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
 
 	/*
 	 * and set the speed of the serial port
 	 */
-	mxser_change_speed(info, NULL);
+	mxser_change_speed(tty, NULL);
 	info->port.flags |= ASYNC_INITIALIZED;
 	spin_unlock_irqrestore(&info->slock, flags);
 
@@ -1009,8 +1007,9 @@
  * This routine will shutdown a serial port; interrupts maybe disabled, and
  * DTR is dropped if the hangup on close termio flag is on.
  */
-static void mxser_shutdown(struct mxser_port *info)
+static void mxser_shutdown(struct tty_struct *tty)
 {
+	struct mxser_port *info = tty->driver_data;
 	unsigned long flags;
 
 	if (!(info->port.flags & ASYNC_INITIALIZED))
@@ -1035,7 +1034,7 @@
 	info->IER = 0;
 	outb(0x00, info->ioaddr + UART_IER);
 
-	if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
+	if (tty->termios->c_cflag & HUPCL)
 		info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
 	outb(info->MCR, info->ioaddr + UART_MCR);
 
@@ -1051,8 +1050,7 @@
 	/* read data port to reset things */
 	(void) inb(info->ioaddr + UART_RX);
 
-	if (info->port.tty)
-		set_bit(TTY_IO_ERROR, &info->port.tty->flags);
+	set_bit(TTY_IO_ERROR, &tty->flags);
 
 	info->port.flags &= ~ASYNC_INITIALIZED;
 
@@ -1084,14 +1082,14 @@
 		return -ENODEV;
 
 	tty->driver_data = info;
-	info->port.tty = tty;
+	tty_port_tty_set(&info->port, tty);
 	/*
 	 * Start up serial port
 	 */
 	spin_lock_irqsave(&info->slock, flags);
 	info->port.count++;
 	spin_unlock_irqrestore(&info->slock, flags);
-	retval = mxser_startup(info);
+	retval = mxser_startup(tty);
 	if (retval)
 		return retval;
 
@@ -1209,13 +1207,13 @@
 				break;
 		}
 	}
-	mxser_shutdown(info);
+	mxser_shutdown(tty);
 
 	mxser_flush_buffer(tty);
 	tty_ldisc_flush(tty);
 
 	tty->closing = 0;
-	info->port.tty = NULL;
+	tty_port_tty_set(&info->port, NULL);
 	if (info->port.blocked_open) {
 		if (info->port.close_delay)
 			schedule_timeout_interruptible(info->port.close_delay);
@@ -1337,12 +1335,13 @@
  * friends of mxser_ioctl()
  * ------------------------------------------------------------
  */
-static int mxser_get_serial_info(struct mxser_port *info,
+static int mxser_get_serial_info(struct tty_struct *tty,
 		struct serial_struct __user *retinfo)
 {
+	struct mxser_port *info = tty->driver_data;
 	struct serial_struct tmp = {
 		.type = info->type,
-		.line = info->port.tty->index,
+		.line = tty->index,
 		.port = info->ioaddr,
 		.irq = info->board->irq,
 		.flags = info->port.flags,
@@ -1357,9 +1356,10 @@
 	return 0;
 }
 
-static int mxser_set_serial_info(struct mxser_port *info,
+static int mxser_set_serial_info(struct tty_struct *tty,
 		struct serial_struct __user *new_info)
 {
+	struct mxser_port *info = tty->driver_data;
 	struct serial_struct new_serial;
 	speed_t baud;
 	unsigned long sl_flags;
@@ -1393,14 +1393,14 @@
 				(new_serial.flags & ASYNC_FLAGS));
 		info->port.close_delay = new_serial.close_delay * HZ / 100;
 		info->port.closing_wait = new_serial.closing_wait * HZ / 100;
-		info->port.tty->low_latency =
-				(info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+		tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY)
+								? 1 : 0;
 		if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
 				(new_serial.baud_base != info->baud_base ||
 				new_serial.custom_divisor !=
 				info->custom_divisor)) {
 			baud = new_serial.baud_base / new_serial.custom_divisor;
-			tty_encode_baud_rate(info->port.tty, baud, baud);
+			tty_encode_baud_rate(tty, baud, baud);
 		}
 	}
 
@@ -1411,11 +1411,11 @@
 	if (info->port.flags & ASYNC_INITIALIZED) {
 		if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
 			spin_lock_irqsave(&info->slock, sl_flags);
-			mxser_change_speed(info, NULL);
+			mxser_change_speed(tty, NULL);
 			spin_unlock_irqrestore(&info->slock, sl_flags);
 		}
 	} else
-		retval = mxser_startup(info);
+		retval = mxser_startup(tty);
 
 	return retval;
 }
@@ -1461,7 +1461,7 @@
 	spin_lock_irqsave(&info->slock, flags);
 	status = inb(info->ioaddr + UART_MSR);
 	if (status & UART_MSR_ANY_DELTA)
-		mxser_check_modem_status(info, status);
+		mxser_check_modem_status(tty, info, status);
 	spin_unlock_irqrestore(&info->slock, flags);
 	return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
 		    ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
@@ -1606,6 +1606,7 @@
 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
 {
 	struct mxser_port *port;
+	struct tty_struct *tty;
 	int result, status;
 	unsigned int i, j;
 	int ret = 0;
@@ -1643,12 +1644,14 @@
 
 				if (!port->ioaddr)
 					goto copy;
+				
+				tty = tty_port_tty_get(&port->port);
 
-				if (!port->port.tty || !port->port.tty->termios)
+				if (!tty || !tty->termios)
 					ms.cflag = port->normal_termios.c_cflag;
 				else
-					ms.cflag = port->port.tty->termios->c_cflag;
-
+					ms.cflag = tty->termios->c_cflag;
+				tty_kref_put(tty);
 				status = inb(port->ioaddr + UART_MSR);
 				if (status & UART_MSR_DCD)
 					ms.dcd = 1;
@@ -1704,15 +1707,18 @@
 				me->up_txcnt[p] = port->mon_data.up_txcnt;
 				me->modem_status[p] =
 					port->mon_data.modem_status;
-				me->baudrate[p] = tty_get_baud_rate(port->port.tty);
+				tty = tty_port_tty_get(&port->port);
 
-				if (!port->port.tty || !port->port.tty->termios) {
+				if (!tty || !tty->termios) {
 					cflag = port->normal_termios.c_cflag;
 					iflag = port->normal_termios.c_iflag;
+					me->baudrate[p] = tty_termios_baud_rate(&port->normal_termios);
 				} else {
-					cflag = port->port.tty->termios->c_cflag;
-					iflag = port->port.tty->termios->c_iflag;
+					cflag = tty->termios->c_cflag;
+					iflag = tty->termios->c_iflag;
+					me->baudrate[p] = tty_get_baud_rate(tty);
 				}
+				tty_kref_put(tty);
 
 				me->databits[p] = cflag & CSIZE;
 				me->stopbits[p] = cflag & CSTOPB;
@@ -1822,12 +1828,12 @@
 	switch (cmd) {
 	case TIOCGSERIAL:
 		lock_kernel();
-		retval = mxser_get_serial_info(info, argp);
+		retval = mxser_get_serial_info(tty, argp);
 		unlock_kernel();
 		return retval;
 	case TIOCSSERIAL:
 		lock_kernel();
-		retval = mxser_set_serial_info(info, argp);
+		retval = mxser_set_serial_info(tty, argp);
 		unlock_kernel();
 		return retval;
 	case TIOCSERGETLSR:	/* Get line status register */
@@ -1896,7 +1902,7 @@
 
 		lock_kernel();
 		status = mxser_get_msr(info->ioaddr, 1, tty->index);
-		mxser_check_modem_status(info, status);
+		mxser_check_modem_status(tty, info, status);
 
 		mcr = inb(info->ioaddr + UART_MCR);
 		if (mcr & MOXA_MUST_MCR_XON_FLAG)
@@ -1909,7 +1915,7 @@
 		else
 			info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
 
-		if (info->port.tty->hw_stopped)
+		if (tty->hw_stopped)
 			info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
 		else
 			info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
@@ -1958,7 +1964,7 @@
 		}
 	}
 
-	if (info->port.tty->termios->c_cflag & CRTSCTS) {
+	if (tty->termios->c_cflag & CRTSCTS) {
 		info->MCR &= ~UART_MCR_RTS;
 		outb(info->MCR, info->ioaddr + UART_MCR);
 	}
@@ -1995,7 +2001,7 @@
 		}
 	}
 
-	if (info->port.tty->termios->c_cflag & CRTSCTS) {
+	if (tty->termios->c_cflag & CRTSCTS) {
 		info->MCR |= UART_MCR_RTS;
 		outb(info->MCR, info->ioaddr + UART_MCR);
 	}
@@ -2040,7 +2046,7 @@
 	unsigned long flags;
 
 	spin_lock_irqsave(&info->slock, flags);
-	mxser_change_speed(info, old_termios);
+	mxser_change_speed(tty, old_termios);
 	spin_unlock_irqrestore(&info->slock, flags);
 
 	if ((old_termios->c_cflag & CRTSCTS) &&
@@ -2138,10 +2144,10 @@
 	struct mxser_port *info = tty->driver_data;
 
 	mxser_flush_buffer(tty);
-	mxser_shutdown(info);
+	mxser_shutdown(tty);
 	info->port.count = 0;
 	info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->port.tty = NULL;
+	tty_port_tty_set(&info->port, NULL);
 	wake_up_interruptible(&info->port.open_wait);
 }
 
@@ -2164,9 +2170,9 @@
 	return 0;
 }
 
-static void mxser_receive_chars(struct mxser_port *port, int *status)
+static void mxser_receive_chars(struct tty_struct *tty,
+				struct mxser_port *port, int *status)
 {
-	struct tty_struct *tty = port->port.tty;
 	unsigned char ch, gdl;
 	int ignored = 0;
 	int cnt = 0;
@@ -2174,9 +2180,8 @@
 	int max = 256;
 
 	recv_room = tty->receive_room;
-	if ((recv_room == 0) && (!port->ldisc_stop_rx))
+	if (recv_room == 0 && !port->ldisc_stop_rx)
 		mxser_stoprx(tty);
-
 	if (port->board->chip_flag != MOXA_OTHER_UART) {
 
 		if (*status & UART_LSR_SPECIAL)
@@ -2253,7 +2258,7 @@
 	} while (*status & UART_LSR_DR);
 
 end_intr:
-	mxvar_log.rxcnt[port->port.tty->index] += cnt;
+	mxvar_log.rxcnt[tty->index] += cnt;
 	port->mon_data.rxcnt += cnt;
 	port->mon_data.up_rxcnt += cnt;
 
@@ -2267,14 +2272,14 @@
 	spin_lock(&port->slock);
 }
 
-static void mxser_transmit_chars(struct mxser_port *port)
+static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
 {
 	int count, cnt;
 
 	if (port->x_char) {
 		outb(port->x_char, port->ioaddr + UART_TX);
 		port->x_char = 0;
-		mxvar_log.txcnt[port->port.tty->index]++;
+		mxvar_log.txcnt[tty->index]++;
 		port->mon_data.txcnt++;
 		port->mon_data.up_txcnt++;
 		port->icount.tx++;
@@ -2284,8 +2289,8 @@
 	if (port->port.xmit_buf == NULL)
 		return;
 
-	if ((port->xmit_cnt <= 0) || port->port.tty->stopped ||
-			(port->port.tty->hw_stopped &&
+	if (port->xmit_cnt <= 0 || tty->stopped ||
+			(tty->hw_stopped &&
 			(port->type != PORT_16550A) &&
 			(!port->board->chip_flag))) {
 		port->IER &= ~UART_IER_THRI;
@@ -2302,14 +2307,14 @@
 		if (--port->xmit_cnt <= 0)
 			break;
 	} while (--count > 0);
-	mxvar_log.txcnt[port->port.tty->index] += (cnt - port->xmit_cnt);
+	mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
 
 	port->mon_data.txcnt += (cnt - port->xmit_cnt);
 	port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
 	port->icount.tx += (cnt - port->xmit_cnt);
 
-	if (port->xmit_cnt < WAKEUP_CHARS)
-		tty_wakeup(port->port.tty);
+	if (port->xmit_cnt < WAKEUP_CHARS && tty)
+		tty_wakeup(tty);
 
 	if (port->xmit_cnt <= 0) {
 		port->IER &= ~UART_IER_THRI;
@@ -2328,6 +2333,7 @@
 	int max, irqbits, bits, msr;
 	unsigned int int_cnt, pass_counter = 0;
 	int handled = IRQ_NONE;
+	struct tty_struct *tty;
 
 	for (i = 0; i < MXSER_BOARDS; i++)
 		if (dev_id == &mxser_boards[i]) {
@@ -2360,13 +2366,15 @@
 				if (iir & UART_IIR_NO_INT)
 					break;
 				iir &= MOXA_MUST_IIR_MASK;
-				if (!port->port.tty ||
+				tty = tty_port_tty_get(&port->port);
+				if (!tty ||
 						(port->port.flags & ASYNC_CLOSING) ||
 						!(port->port.flags &
 							ASYNC_INITIALIZED)) {
 					status = inb(port->ioaddr + UART_LSR);
 					outb(0x27, port->ioaddr + UART_FCR);
 					inb(port->ioaddr + UART_MSR);
+					tty_kref_put(tty);
 					break;
 				}
 
@@ -2387,27 +2395,28 @@
 					    iir == MOXA_MUST_IIR_RDA ||
 					    iir == MOXA_MUST_IIR_RTO ||
 					    iir == MOXA_MUST_IIR_LSR)
-						mxser_receive_chars(port,
+						mxser_receive_chars(tty, port,
 								&status);
 
 				} else {
 					status &= port->read_status_mask;
 					if (status & UART_LSR_DR)
-						mxser_receive_chars(port,
+						mxser_receive_chars(tty, port,
 								&status);
 				}
 				msr = inb(port->ioaddr + UART_MSR);
 				if (msr & UART_MSR_ANY_DELTA)
-					mxser_check_modem_status(port, msr);
+					mxser_check_modem_status(tty, port, msr);
 
 				if (port->board->chip_flag) {
 					if (iir == 0x02 && (status &
 								UART_LSR_THRE))
-						mxser_transmit_chars(port);
+						mxser_transmit_chars(tty, port);
 				} else {
 					if (status & UART_LSR_THRE)
-						mxser_transmit_chars(port);
+						mxser_transmit_chars(tty, port);
 				}
+				tty_kref_put(tty);
 			} while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
 			spin_unlock(&port->slock);
 		}
diff --git a/drivers/char/n_hdlc.c b/drivers/char/n_hdlc.c
index 69ec639..bacb3e2 100644
--- a/drivers/char/n_hdlc.c
+++ b/drivers/char/n_hdlc.c
@@ -764,7 +764,7 @@
 		break;
 
 	default:
-		error = n_tty_ioctl (tty, file, cmd, arg);
+		error = n_tty_ioctl_helper(tty, file, cmd, arg);
 		break;
 	}
 	return error;
diff --git a/drivers/char/n_r3964.c b/drivers/char/n_r3964.c
index ae377aa..4a8215a 100644
--- a/drivers/char/n_r3964.c
+++ b/drivers/char/n_r3964.c
@@ -372,14 +372,8 @@
 static void put_char(struct r3964_info *pInfo, unsigned char ch)
 {
 	struct tty_struct *tty = pInfo->tty;
-
-	if (tty == NULL)
-		return;
-
 	/* FIXME: put_char should not be called from an IRQ */
-	if (tty->ops->put_char) {
-		tty->ops->put_char(tty, ch);
-	}
+	tty_put_char(tty, ch);
 	pInfo->bcc ^= ch;
 }
 
diff --git a/drivers/char/n_tty.c b/drivers/char/n_tty.c
index 708c2b1..efbfe961 100644
--- a/drivers/char/n_tty.c
+++ b/drivers/char/n_tty.c
@@ -26,7 +26,7 @@
  *
  * 2002/03/18   Implemented n_tty_wakeup to send SIGIO POLL_OUTs to
  *		waiting writing processes-Sapan Bhatia <sapan@corewars.org>.
- *		Also fixed a bug in BLOCKING mode where write_chan returns
+ *		Also fixed a bug in BLOCKING mode where n_tty_write returns
  *		EAGAIN
  */
 
@@ -99,6 +99,7 @@
 
 static void n_tty_set_room(struct tty_struct *tty)
 {
+	/* tty->read_cnt is not read locked ? */
 	int	left = N_TTY_BUF_SIZE - tty->read_cnt - 1;
 
 	/*
@@ -121,6 +122,16 @@
 	}
 }
 
+/**
+ *	put_tty_queue		-	add character to tty
+ *	@c: character
+ *	@tty: tty device
+ *
+ *	Add a character to the tty read_buf queue. This is done under the
+ *	read_lock to serialize character addition and also to protect us
+ *	against parallel reads or flushes
+ */
+
 static void put_tty_queue(unsigned char c, struct tty_struct *tty)
 {
 	unsigned long flags;
@@ -137,14 +148,11 @@
  *	check_unthrottle	-	allow new receive data
  *	@tty; tty device
  *
- *	Check whether to call the driver.unthrottle function.
- *	We test the TTY_THROTTLED bit first so that it always
- *	indicates the current state. The decision about whether
- *	it is worth allowing more input has been taken by the caller.
+ *	Check whether to call the driver unthrottle functions
+ *
  *	Can sleep, may be called under the atomic_read_lock mutex but
  *	this is not guaranteed.
  */
-
 static void check_unthrottle(struct tty_struct *tty)
 {
 	if (tty->count)
@@ -158,6 +166,8 @@
  *	Reset the read buffer counters, clear the flags,
  *	and make sure the driver is unthrottled. Called
  *	from n_tty_open() and n_tty_flush_buffer().
+ *
+ *	Locking: tty_read_lock for read fields.
  */
 static void reset_buffer_flags(struct tty_struct *tty)
 {
@@ -181,7 +191,7 @@
  *	at hangup) or when the N_TTY line discipline internally has to
  *	clean the pending queue (for example some signals).
  *
- *	Locking: ctrl_lock
+ *	Locking: ctrl_lock, read_lock.
  */
 
 static void n_tty_flush_buffer(struct tty_struct *tty)
@@ -207,6 +217,8 @@
  *
  *	Report the number of characters buffered to be delivered to user
  *	at this instant in time.
+ *
+ *	Locking: read_lock
  */
 
 static ssize_t n_tty_chars_in_buffer(struct tty_struct *tty)
@@ -346,7 +358,7 @@
  *	the simple cases normally found and helps to generate blocks of
  *	symbols for the console driver and thus improve performance.
  *
- *	Called from write_chan under the tty layer write lock. Relies
+ *	Called from n_tty_write under the tty layer write lock. Relies
  *	on lock_kernel for the tty->column state.
  */
 
@@ -410,6 +422,8 @@
  *
  *	Echo user input back onto the screen. This must be called only when
  *	L_ECHO(tty) is true. Called from the driver receive_buf path.
+ *
+ *	Relies on BKL for tty column locking
  */
 
 static void echo_char(unsigned char c, struct tty_struct *tty)
@@ -422,6 +436,12 @@
 		opost(c, tty);
 }
 
+/**
+ *	finsh_erasing		-	complete erase
+ *	@tty: tty doing the erase
+ *
+ *	Relies on BKL for tty column locking
+ */
 static inline void finish_erasing(struct tty_struct *tty)
 {
 	if (tty->erasing) {
@@ -439,6 +459,8 @@
  *	Perform erase and necessary output when an erase character is
  *	present in the stream from the driver layer. Handles the complexities
  *	of UTF-8 multibyte symbols.
+ *
+ *	Locking: read_lock for tty buffers, BKL for column/erasing state
  */
 
 static void eraser(unsigned char c, struct tty_struct *tty)
@@ -447,6 +469,7 @@
 	int head, seen_alnums, cnt;
 	unsigned long flags;
 
+	/* FIXME: locking needed ? */
 	if (tty->read_head == tty->canon_head) {
 		/* opost('\a', tty); */		/* what do you think? */
 		return;
@@ -481,6 +504,7 @@
 	}
 
 	seen_alnums = 0;
+	/* FIXME: Locking ?? */
 	while (tty->read_head != tty->canon_head) {
 		head = tty->read_head;
 
@@ -583,6 +607,8 @@
  *	may caus terminal flushing to take place according to the termios
  *	settings and character used. Called from the driver receive_buf
  *	path so serialized.
+ *
+ *	Locking: ctrl_lock, read_lock (both via flush buffer)
  */
 
 static inline void isig(int sig, struct tty_struct *tty, int flush)
@@ -1007,12 +1033,26 @@
  *	and is protected from re-entry by the tty layer. The user is
  *	guaranteed that this function will not be re-entered or in progress
  *	when the ldisc is closed.
+ *
+ *	Locking: Caller holds tty->termios_mutex
  */
 
 static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
 {
-	if (!tty)
-		return;
+	int canon_change = 1;
+	BUG_ON(!tty);
+
+	if (old)
+		canon_change = (old->c_lflag ^ tty->termios->c_lflag) & ICANON;
+	if (canon_change) {
+		memset(&tty->read_flags, 0, sizeof tty->read_flags);
+		tty->canon_head = tty->read_tail;
+		tty->canon_data = 0;
+		tty->erasing = 0;
+	}
+
+	if (canon_change && !L_ICANON(tty) && tty->read_cnt)
+		wake_up_interruptible(&tty->read_wait);
 
 	tty->icanon = (L_ICANON(tty) != 0);
 	if (test_bit(TTY_HW_COOK_IN, &tty->flags)) {
@@ -1143,7 +1183,7 @@
  *	@b: user data
  *	@nr: size of data
  *
- *	Helper function to speed up read_chan.  It is only called when
+ *	Helper function to speed up n_tty_read.  It is only called when
  *	ICANON is off; it copies characters straight from the tty queue to
  *	user space directly.  It can be profitably called twice; once to
  *	drain the space from the tail pointer to the (physical) end of the
@@ -1210,7 +1250,7 @@
 	if (file->f_op->write != redirected_tty_write &&
 	    current->signal->tty == tty) {
 		if (!tty->pgrp)
-			printk(KERN_ERR "read_chan: no tty->pgrp!\n");
+			printk(KERN_ERR "n_tty_read: no tty->pgrp!\n");
 		else if (task_pgrp(current) != tty->pgrp) {
 			if (is_ignored(SIGTTIN) ||
 			    is_current_pgrp_orphaned())
@@ -1225,7 +1265,7 @@
 
 
 /**
- *	read_chan		-	read function for tty
+ *	n_tty_read		-	read function for tty
  *	@tty: tty device
  *	@file: file object
  *	@buf: userspace buffer pointer
@@ -1239,7 +1279,7 @@
  *	This code must be sure never to sleep through a hangup.
  */
 
-static ssize_t read_chan(struct tty_struct *tty, struct file *file,
+static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
 			 unsigned char __user *buf, size_t nr)
 {
 	unsigned char __user *b = buf;
@@ -1254,10 +1294,7 @@
 
 do_it_again:
 
-	if (!tty->read_buf) {
-		printk(KERN_ERR "n_tty_read_chan: read_buf == NULL?!?\n");
-		return -EIO;
-	}
+	BUG_ON(!tty->read_buf);
 
 	c = job_control(tty, file);
 	if (c < 0)
@@ -1444,7 +1481,7 @@
 }
 
 /**
- *	write_chan		-	write function for tty
+ *	n_tty_write		-	write function for tty
  *	@tty: tty device
  *	@file: file object
  *	@buf: userspace buffer pointer
@@ -1458,7 +1495,7 @@
  *	This code must be sure never to sleep through a hangup.
  */
 
-static ssize_t write_chan(struct tty_struct *tty, struct file *file,
+static ssize_t n_tty_write(struct tty_struct *tty, struct file *file,
 			  const unsigned char *buf, size_t nr)
 {
 	const unsigned char *b = buf;
@@ -1532,7 +1569,7 @@
 }
 
 /**
- *	normal_poll		-	poll method for N_TTY
+ *	n_tty_poll		-	poll method for N_TTY
  *	@tty: terminal device
  *	@file: file accessing it
  *	@wait: poll table
@@ -1545,7 +1582,7 @@
  *	Called without the kernel lock held - fine
  */
 
-static unsigned int normal_poll(struct tty_struct *tty, struct file *file,
+static unsigned int n_tty_poll(struct tty_struct *tty, struct file *file,
 							poll_table *wait)
 {
 	unsigned int mask = 0;
@@ -1573,6 +1610,44 @@
 	return mask;
 }
 
+static unsigned long inq_canon(struct tty_struct *tty)
+{
+	int nr, head, tail;
+
+	if (!tty->canon_data)
+		return 0;
+	head = tty->canon_head;
+	tail = tty->read_tail;
+	nr = (head - tail) & (N_TTY_BUF_SIZE-1);
+	/* Skip EOF-chars.. */
+	while (head != tail) {
+		if (test_bit(tail, tty->read_flags) &&
+		    tty->read_buf[tail] == __DISABLED_CHAR)
+			nr--;
+		tail = (tail+1) & (N_TTY_BUF_SIZE-1);
+	}
+	return nr;
+}
+
+static int n_tty_ioctl(struct tty_struct *tty, struct file *file,
+		       unsigned int cmd, unsigned long arg)
+{
+	int retval;
+
+	switch (cmd) {
+	case TIOCOUTQ:
+		return put_user(tty_chars_in_buffer(tty), (int __user *) arg);
+	case TIOCINQ:
+		/* FIXME: Locking */
+		retval = tty->read_cnt;
+		if (L_ICANON(tty))
+			retval = inq_canon(tty);
+		return put_user(retval, (unsigned int __user *) arg);
+	default:
+		return n_tty_ioctl_helper(tty, file, cmd, arg);
+	}
+}
+
 struct tty_ldisc_ops tty_ldisc_N_TTY = {
 	.magic           = TTY_LDISC_MAGIC,
 	.name            = "n_tty",
@@ -1580,11 +1655,11 @@
 	.close           = n_tty_close,
 	.flush_buffer    = n_tty_flush_buffer,
 	.chars_in_buffer = n_tty_chars_in_buffer,
-	.read            = read_chan,
-	.write           = write_chan,
+	.read            = n_tty_read,
+	.write           = n_tty_write,
 	.ioctl           = n_tty_ioctl,
 	.set_termios     = n_tty_set_termios,
-	.poll            = normal_poll,
+	.poll            = n_tty_poll,
 	.receive_buf     = n_tty_receive_buf,
 	.write_wakeup    = n_tty_write_wakeup
 };
diff --git a/drivers/char/nozomi.c b/drivers/char/nozomi.c
index 66a0f93..9a34a19 100644
--- a/drivers/char/nozomi.c
+++ b/drivers/char/nozomi.c
@@ -1599,7 +1599,10 @@
 	return 0;
 }
 
-/* Called when the userspace process close the tty, /dev/noz*. */
+/* Called when the userspace process close the tty, /dev/noz*. Also
+   called immediately if ntty_open fails in which case tty->driver_data
+   will be NULL an we exit by the first return */
+
 static void ntty_close(struct tty_struct *tty, struct file *file)
 {
 	struct nozomi *dc = get_dc_by_tty(tty);
diff --git a/drivers/char/pcmcia/ipwireless/tty.c b/drivers/char/pcmcia/ipwireless/tty.c
index 3a23e76..569f2f7 100644
--- a/drivers/char/pcmcia/ipwireless/tty.c
+++ b/drivers/char/pcmcia/ipwireless/tty.c
@@ -276,6 +276,7 @@
 	struct ipw_tty *tty = linux_tty->driver_data;
 	int room;
 
+	/* FIXME: Exactly how is the tty object locked here .. */
 	if (!tty)
 		return -ENODEV;
 
@@ -397,6 +398,7 @@
 static int ipw_tiocmget(struct tty_struct *linux_tty, struct file *file)
 {
 	struct ipw_tty *tty = linux_tty->driver_data;
+	/* FIXME: Exactly how is the tty object locked here .. */
 
 	if (!tty)
 		return -ENODEV;
@@ -412,6 +414,7 @@
 	     unsigned int set, unsigned int clear)
 {
 	struct ipw_tty *tty = linux_tty->driver_data;
+	/* FIXME: Exactly how is the tty object locked here .. */
 
 	if (!tty)
 		return -ENODEV;
@@ -433,6 +436,8 @@
 	if (!tty->open_count)
 		return -EINVAL;
 
+	/* FIXME: Exactly how is the tty object locked here .. */
+
 	switch (cmd) {
 	case TIOCGSERIAL:
 		return ipwireless_get_serial_info(tty, (void __user *) arg);
@@ -467,13 +472,6 @@
 			}
 			return 0;
 
-		case TCGETS:
-		case TCGETA:
-			return n_tty_ioctl(linux_tty, file, cmd, arg);
-
-		case TCFLSH:
-			return n_tty_ioctl(linux_tty, file, cmd, arg);
-
 		case FIONREAD:
 			{
 				int val = 0;
@@ -482,10 +480,11 @@
 					return -EFAULT;
 			}
 			return 0;
+		case TCFLSH:
+			return tty_perform_flush(linux_tty, arg);
 		}
 	}
-
-	return -ENOIOCTLCMD;
+	return tty_mode_ioctl(linux_tty, file, cmd , arg);
 }
 
 static int add_tty(dev_node_t *nodesp, int j,
@@ -588,6 +587,8 @@
 				tty_hangup(ttyj->linux_tty);
 				/* Wait till the tty_hangup has completed */
 				flush_scheduled_work();
+				/* FIXME: Exactly how is the tty object locked here
+				   against a parallel ioctl etc */
 				mutex_lock(&ttyj->ipw_tty_mutex);
 			}
 			while (ttyj->open_count)
diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 76b2793..6d45827 100644
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -8,10 +8,12 @@
  *  Added TTY_DO_WRITE_WAKEUP to enable n_tty to send POLL_OUT to
  *      waiting writers -- Sapan Bhatia <sapan@corewars.org>
  *
- *
+ *  When reading this code see also fs/devpts. In particular note that the
+ *  driver_data field is used by the devpts side as a binding to the devpts
+ *  inode.
  */
 
-#include <linux/module.h>	/* For EXPORT_SYMBOL */
+#include <linux/module.h>
 
 #include <linux/errno.h>
 #include <linux/interrupt.h>
@@ -23,26 +25,25 @@
 #include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/sysctl.h>
-
-#include <asm/uaccess.h>
-#include <asm/system.h>
+#include <linux/device.h>
+#include <linux/uaccess.h>
 #include <linux/bitops.h>
 #include <linux/devpts_fs.h>
 
+#include <asm/system.h>
+
 /* These are global because they are accessed in tty_io.c */
 #ifdef CONFIG_UNIX98_PTYS
 struct tty_driver *ptm_driver;
 static struct tty_driver *pts_driver;
 #endif
 
-static void pty_close(struct tty_struct * tty, struct file * filp)
+static void pty_close(struct tty_struct *tty, struct file *filp)
 {
-	if (!tty)
-		return;
-	if (tty->driver->subtype == PTY_TYPE_MASTER) {
-		if (tty->count > 1)
-			printk("master pty_close: count = %d!!\n", tty->count);
-	} else {
+	BUG_ON(!tty);
+	if (tty->driver->subtype == PTY_TYPE_MASTER)
+		WARN_ON(tty->count > 1);
+	else {
 		if (tty->count > 2)
 			return;
 	}
@@ -59,7 +60,7 @@
 		set_bit(TTY_OTHER_CLOSED, &tty->flags);
 #ifdef CONFIG_UNIX98_PTYS
 		if (tty->driver == ptm_driver)
-			devpts_pty_kill(tty->index);
+			devpts_pty_kill(tty->link);
 #endif
 		tty_vhangup(tty->link);
 	}
@@ -69,13 +70,13 @@
  * The unthrottle routine is called by the line discipline to signal
  * that it can receive more characters.  For PTY's, the TTY_THROTTLED
  * flag is always set, to force the line discipline to always call the
- * unthrottle routine when there are fewer than TTY_THRESHOLD_UNTHROTTLE 
+ * unthrottle routine when there are fewer than TTY_THRESHOLD_UNTHROTTLE
  * characters in the queue.  This is necessary since each time this
  * happens, we need to wake up any sleeping processes that could be
  * (1) trying to send data to the pty, or (2) waiting in wait_until_sent()
  * for the pty buffer to be drained.
  */
-static void pty_unthrottle(struct tty_struct * tty)
+static void pty_unthrottle(struct tty_struct *tty)
 {
 	struct tty_struct *o_tty = tty->link;
 
@@ -87,7 +88,7 @@
 }
 
 /*
- * WSH 05/24/97: modified to 
+ * WSH 05/24/97: modified to
  *   (1) use space in tty->flip instead of a shared temp buffer
  *	 The flip buffers aren't being used for a pty, so there's lots
  *	 of space available.  The buffer is protected by a per-pty
@@ -100,7 +101,8 @@
  * not our partners. We can't just take the other one blindly without
  * risking deadlocks.
  */
-static int pty_write(struct tty_struct * tty, const unsigned char *buf, int count)
+static int pty_write(struct tty_struct *tty, const unsigned char *buf,
+								int count)
 {
 	struct tty_struct *to = tty->link;
 	int	c;
@@ -112,7 +114,7 @@
 	if (c > count)
 		c = count;
 	to->ldisc.ops->receive_buf(to, buf, NULL, c);
-	
+
 	return c;
 }
 
@@ -128,17 +130,17 @@
 
 /*
  *	WSH 05/24/97:  Modified for asymmetric MASTER/SLAVE behavior
- *	The chars_in_buffer() value is used by the ldisc select() function 
+ *	The chars_in_buffer() value is used by the ldisc select() function
  *	to hold off writing when chars_in_buffer > WAKEUP_CHARS (== 256).
  *	The pty driver chars_in_buffer() Master/Slave must behave differently:
  *
  *      The Master side needs to allow typed-ahead commands to accumulate
  *      while being canonicalized, so we report "our buffer" as empty until
  *	some threshold is reached, and then report the count. (Any count >
- *	WAKEUP_CHARS is regarded by select() as "full".)  To avoid deadlock 
- *	the count returned must be 0 if no canonical data is available to be 
+ *	WAKEUP_CHARS is regarded by select() as "full".)  To avoid deadlock
+ *	the count returned must be 0 if no canonical data is available to be
  *	read. (The N_TTY ldisc.chars_in_buffer now knows this.)
- *  
+ *
  *	The Slave side passes all characters in raw mode to the Master side's
  *	buffer where they can be read immediately, so in this case we can
  *	return the true count in the buffer.
@@ -155,21 +157,22 @@
 	/* The ldisc must report 0 if no characters available to be read */
 	count = to->ldisc.ops->chars_in_buffer(to);
 
-	if (tty->driver->subtype == PTY_TYPE_SLAVE) return count;
+	if (tty->driver->subtype == PTY_TYPE_SLAVE)
+		return count;
 
-	/* Master side driver ... if the other side's read buffer is less than 
+	/* Master side driver ... if the other side's read buffer is less than
 	 * half full, return 0 to allow writers to proceed; otherwise return
-	 * the count.  This leaves a comfortable margin to avoid overflow, 
+	 * the count.  This leaves a comfortable margin to avoid overflow,
 	 * and still allows half a buffer's worth of typed-ahead commands.
 	 */
-	return ((count < N_TTY_BUF_SIZE/2) ? 0 : count);
+	return (count < N_TTY_BUF_SIZE/2) ? 0 : count;
 }
 
 /* Set the lock flag on a pty */
-static int pty_set_lock(struct tty_struct *tty, int __user * arg)
+static int pty_set_lock(struct tty_struct *tty, int __user *arg)
 {
 	int val;
-	if (get_user(val,arg))
+	if (get_user(val, arg))
 		return -EFAULT;
 	if (val)
 		set_bit(TTY_PTY_LOCK, &tty->flags);
@@ -182,13 +185,13 @@
 {
 	struct tty_struct *to = tty->link;
 	unsigned long flags;
-	
+
 	if (!to)
 		return;
-	
+
 	if (to->ldisc.ops->flush_buffer)
 		to->ldisc.ops->flush_buffer(to);
-	
+
 	if (to->packet) {
 		spin_lock_irqsave(&tty->ctrl_lock, flags);
 		tty->ctrl_status |= TIOCPKT_FLUSHWRITE;
@@ -197,7 +200,7 @@
 	}
 }
 
-static int pty_open(struct tty_struct *tty, struct file * filp)
+static int pty_open(struct tty_struct *tty, struct file *filp)
 {
 	int	retval = -ENODEV;
 
@@ -220,13 +223,65 @@
 	return retval;
 }
 
-static void pty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void pty_set_termios(struct tty_struct *tty,
+					struct ktermios *old_termios)
 {
-        tty->termios->c_cflag &= ~(CSIZE | PARENB);
-        tty->termios->c_cflag |= (CS8 | CREAD);
+	tty->termios->c_cflag &= ~(CSIZE | PARENB);
+	tty->termios->c_cflag |= (CS8 | CREAD);
 }
 
+static int pty_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+	struct tty_struct *o_tty;
+	int idx = tty->index;
+	int retval;
+
+	o_tty = alloc_tty_struct();
+	if (!o_tty)
+		return -ENOMEM;
+	if (!try_module_get(driver->other->owner)) {
+		/* This cannot in fact currently happen */
+		free_tty_struct(o_tty);
+		return -ENOMEM;
+	}
+	initialize_tty_struct(o_tty, driver->other, idx);
+
+	/* We always use new tty termios data so we can do this
+	   the easy way .. */
+	retval = tty_init_termios(tty);
+	if (retval)
+		goto free_mem_out;
+
+	retval = tty_init_termios(o_tty);
+	if (retval) {
+		tty_free_termios(tty);
+		goto free_mem_out;
+	}
+
+	/*
+	 * Everything allocated ... set up the o_tty structure.
+	 */
+	driver->other->ttys[idx] = o_tty;
+	tty_driver_kref_get(driver->other);
+	if (driver->subtype == PTY_TYPE_MASTER)
+		o_tty->count++;
+	/* Establish the links in both directions */
+	tty->link   = o_tty;
+	o_tty->link = tty;
+
+	tty_driver_kref_get(driver);
+	tty->count++;
+	driver->ttys[idx] = tty;
+	return 0;
+free_mem_out:
+	module_put(o_tty->driver->owner);
+	free_tty_struct(o_tty);
+	return -ENOMEM;
+}
+
+
 static const struct tty_operations pty_ops = {
+	.install = pty_install,
 	.open = pty_open,
 	.close = pty_close,
 	.write = pty_write,
@@ -329,8 +384,11 @@
  * Otherwise one can eat up all kernel memory by opening /dev/ptmx repeatedly.
  */
 int pty_limit = NR_UNIX98_PTY_DEFAULT;
-static int pty_limit_min = 0;
+static int pty_limit_min;
 static int pty_limit_max = NR_UNIX98_PTY_MAX;
+static int pty_count;
+
+static struct cdev ptmx_cdev;
 
 static struct ctl_table pty_table[] = {
 	{
@@ -348,6 +406,7 @@
 		.procname	= "nr",
 		.maxlen		= sizeof(int),
 		.mode		= 0444,
+		.data		= &pty_count,
 		.proc_handler	= &proc_dointvec,
 	}, {
 		.ctl_name	= 0
@@ -388,7 +447,111 @@
 	return -ENOIOCTLCMD;
 }
 
-static const struct tty_operations pty_unix98_ops = {
+/**
+ *	ptm_unix98_lookup	-	find a pty master
+ *	@driver: ptm driver
+ *	@idx: tty index
+ *
+ *	Look up a pty master device. Called under the tty_mutex for now.
+ *	This provides our locking.
+ */
+
+static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
+		struct inode *ptm_inode, int idx)
+{
+	struct tty_struct *tty = devpts_get_tty(ptm_inode, idx);
+	if (tty)
+		tty = tty->link;
+	return tty;
+}
+
+/**
+ *	pts_unix98_lookup	-	find a pty slave
+ *	@driver: pts driver
+ *	@idx: tty index
+ *
+ *	Look up a pty master device. Called under the tty_mutex for now.
+ *	This provides our locking.
+ */
+
+static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver,
+		struct inode *pts_inode, int idx)
+{
+	struct tty_struct *tty = devpts_get_tty(pts_inode, idx);
+	/* Master must be open before slave */
+	if (!tty)
+		return ERR_PTR(-EIO);
+	return tty;
+}
+
+static void pty_unix98_shutdown(struct tty_struct *tty)
+{
+	/* We have our own method as we don't use the tty index */
+	kfree(tty->termios);
+}
+
+/* We have no need to install and remove our tty objects as devpts does all
+   the work for us */
+
+static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
+{
+	struct tty_struct *o_tty;
+	int idx = tty->index;
+
+	o_tty = alloc_tty_struct();
+	if (!o_tty)
+		return -ENOMEM;
+	if (!try_module_get(driver->other->owner)) {
+		/* This cannot in fact currently happen */
+		free_tty_struct(o_tty);
+		return -ENOMEM;
+	}
+	initialize_tty_struct(o_tty, driver->other, idx);
+
+	tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
+	if (tty->termios == NULL)
+		goto free_mem_out;
+	*tty->termios = driver->init_termios;
+	tty->termios_locked = tty->termios + 1;
+
+	o_tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
+	if (o_tty->termios == NULL)
+		goto free_mem_out;
+	*o_tty->termios = driver->other->init_termios;
+	o_tty->termios_locked = o_tty->termios + 1;
+
+	tty_driver_kref_get(driver->other);
+	if (driver->subtype == PTY_TYPE_MASTER)
+		o_tty->count++;
+	/* Establish the links in both directions */
+	tty->link   = o_tty;
+	o_tty->link = tty;
+	/*
+	 * All structures have been allocated, so now we install them.
+	 * Failures after this point use release_tty to clean up, so
+	 * there's no need to null out the local pointers.
+	 */
+	tty_driver_kref_get(driver);
+	tty->count++;
+	pty_count++;
+	return 0;
+free_mem_out:
+	kfree(o_tty->termios);
+	module_put(o_tty->driver->owner);
+	free_tty_struct(o_tty);
+	kfree(tty->termios);
+	return -ENOMEM;
+}
+
+static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
+{
+	pty_count--;
+}
+
+static const struct tty_operations ptm_unix98_ops = {
+	.lookup = ptm_unix98_lookup,
+	.install = pty_unix98_install,
+	.remove = pty_unix98_remove,
 	.open = pty_open,
 	.close = pty_close,
 	.write = pty_write,
@@ -397,9 +560,89 @@
 	.chars_in_buffer = pty_chars_in_buffer,
 	.unthrottle = pty_unthrottle,
 	.set_termios = pty_set_termios,
-	.ioctl = pty_unix98_ioctl
+	.ioctl = pty_unix98_ioctl,
+	.shutdown = pty_unix98_shutdown
 };
 
+static const struct tty_operations pty_unix98_ops = {
+	.lookup = pts_unix98_lookup,
+	.install = pty_unix98_install,
+	.remove = pty_unix98_remove,
+	.open = pty_open,
+	.close = pty_close,
+	.write = pty_write,
+	.write_room = pty_write_room,
+	.flush_buffer = pty_flush_buffer,
+	.chars_in_buffer = pty_chars_in_buffer,
+	.unthrottle = pty_unthrottle,
+	.set_termios = pty_set_termios,
+	.shutdown = pty_unix98_shutdown
+};
+
+/**
+ *	ptmx_open		-	open a unix 98 pty master
+ *	@inode: inode of device file
+ *	@filp: file pointer to tty
+ *
+ *	Allocate a unix98 pty master device from the ptmx driver.
+ *
+ *	Locking: tty_mutex protects the init_dev work. tty->count should
+ * 		protect the rest.
+ *		allocated_ptys_lock handles the list of free pty numbers
+ */
+
+static int __ptmx_open(struct inode *inode, struct file *filp)
+{
+	struct tty_struct *tty;
+	int retval;
+	int index;
+
+	nonseekable_open(inode, filp);
+
+	/* find a device that is not in use. */
+	index = devpts_new_index(inode);
+	if (index < 0)
+		return index;
+
+	mutex_lock(&tty_mutex);
+	tty = tty_init_dev(ptm_driver, index, 1);
+	mutex_unlock(&tty_mutex);
+
+	if (IS_ERR(tty)) {
+		retval = PTR_ERR(tty);
+		goto out;
+	}
+
+	set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
+	filp->private_data = tty;
+	file_move(filp, &tty->tty_files);
+
+	retval = devpts_pty_new(inode, tty->link);
+	if (retval)
+		goto out1;
+
+	retval = ptm_driver->ops->open(tty, filp);
+	if (!retval)
+		return 0;
+out1:
+	tty_release_dev(filp);
+	return retval;
+out:
+	devpts_kill_index(inode, index);
+	return retval;
+}
+
+static int ptmx_open(struct inode *inode, struct file *filp)
+{
+	int ret;
+
+	lock_kernel();
+	ret = __ptmx_open(inode, filp);
+	unlock_kernel();
+	return ret;
+}
+
+static struct file_operations ptmx_fops;
 
 static void __init unix98_pty_init(void)
 {
@@ -427,7 +670,7 @@
 	ptm_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
 		TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
 	ptm_driver->other = pts_driver;
-	tty_set_operations(ptm_driver, &pty_unix98_ops);
+	tty_set_operations(ptm_driver, &ptm_unix98_ops);
 
 	pts_driver->owner = THIS_MODULE;
 	pts_driver->driver_name = "pty_slave";
@@ -443,16 +686,26 @@
 	pts_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
 		TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
 	pts_driver->other = ptm_driver;
-	tty_set_operations(pts_driver, &pty_ops);
-	
+	tty_set_operations(pts_driver, &pty_unix98_ops);
+
 	if (tty_register_driver(ptm_driver))
 		panic("Couldn't register Unix98 ptm driver");
 	if (tty_register_driver(pts_driver))
 		panic("Couldn't register Unix98 pts driver");
 
-	pty_table[1].data = &ptm_driver->refcount;
 	register_sysctl_table(pty_root_table);
+
+	/* Now create the /dev/ptmx special device */
+	tty_default_fops(&ptmx_fops);
+	ptmx_fops.open = ptmx_open;
+
+	cdev_init(&ptmx_cdev, &ptmx_fops);
+	if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
+	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
+		panic("Couldn't register /dev/ptmx driver\n");
+	device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
 }
+
 #else
 static inline void unix98_pty_init(void) { }
 #endif
diff --git a/drivers/char/stallion.c b/drivers/char/stallion.c
index 19db1eb..8b8f07a 100644
--- a/drivers/char/stallion.c
+++ b/drivers/char/stallion.c
@@ -405,9 +405,9 @@
 
 static int	stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
 static int	stl_brdinit(struct stlbrd *brdp);
-static int	stl_getportstats(struct stlport *portp, comstats_t __user *cp);
+static int	stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp);
 static int	stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
-static int	stl_waitcarrier(struct stlport *portp, struct file *filp);
+static int	stl_waitcarrier(struct tty_struct *tty, struct stlport *portp, struct file *filp);
 
 /*
  *	CD1400 uart specific handling functions.
@@ -612,8 +612,9 @@
 static void stl_cd_change(struct stlport *portp)
 {
 	unsigned int oldsigs = portp->sigs;
+	struct tty_struct *tty = tty_port_tty_get(&portp->port);
 
-	if (!portp->port.tty)
+	if (!tty)
 		return;
 
 	portp->sigs = stl_getsignals(portp);
@@ -623,7 +624,8 @@
 
 	if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
 		if (portp->port.flags & ASYNC_CHECK_CD)
-			tty_hangup(portp->port.tty);
+			tty_hangup(tty);
+	tty_kref_put(tty);
 }
 
 /*
@@ -734,7 +736,7 @@
  *	On the first open of the device setup the port hardware, and
  *	initialize the per port data structure.
  */
-	portp->port.tty = tty;
+	tty_port_tty_set(&portp->port, tty);
 	tty->driver_data = portp;
 	portp->port.count++;
 
@@ -774,7 +776,7 @@
  *	then also we might have to wait for carrier.
  */
 	if (!(filp->f_flags & O_NONBLOCK))
-		if ((rc = stl_waitcarrier(portp, filp)) != 0)
+		if ((rc = stl_waitcarrier(tty, portp, filp)) != 0)
 			return rc;
 
 	portp->port.flags |= ASYNC_NORMAL_ACTIVE;
@@ -789,7 +791,8 @@
  *	maybe because if we are clocal then we don't need to wait...
  */
 
-static int stl_waitcarrier(struct stlport *portp, struct file *filp)
+static int stl_waitcarrier(struct tty_struct *tty, struct stlport *portp,
+							struct file *filp)
 {
 	unsigned long	flags;
 	int		rc, doclocal;
@@ -801,7 +804,7 @@
 
 	spin_lock_irqsave(&stallion_lock, flags);
 
-	if (portp->port.tty->termios->c_cflag & CLOCAL)
+	if (tty->termios->c_cflag & CLOCAL)
 		doclocal++;
 
 	portp->openwaitcnt++;
@@ -846,8 +849,6 @@
 
 	pr_debug("stl_flushbuffer(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -865,8 +866,6 @@
 
 	pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -949,7 +948,7 @@
 	tty_ldisc_flush(tty);
 
 	tty->closing = 0;
-	portp->port.tty = NULL;
+	tty_port_tty_set(&portp->port, NULL);
 
 	if (portp->openwaitcnt) {
 		if (portp->close_delay)
@@ -1033,8 +1032,6 @@
 
 	pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
 
-	if (tty == NULL)
-		return -EINVAL;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return -EINVAL;
@@ -1070,8 +1067,6 @@
 
 	pr_debug("stl_flushchars(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1090,8 +1085,6 @@
 
 	pr_debug("stl_writeroom(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return 0;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return 0;
@@ -1122,8 +1115,6 @@
 
 	pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return 0;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return 0;
@@ -1183,8 +1174,9 @@
  *	just quietly ignore any requests to change irq, etc.
  */
 
-static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
+static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp)
 {
+	struct stlport *	portp = tty->driver_data;
 	struct serial_struct	sio;
 
 	pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
@@ -1205,7 +1197,7 @@
 	portp->close_delay = sio.close_delay;
 	portp->closing_wait = sio.closing_wait;
 	portp->custom_divisor = sio.custom_divisor;
-	stl_setport(portp, portp->port.tty->termios);
+	stl_setport(portp, tty->termios);
 	return 0;
 }
 
@@ -1215,8 +1207,6 @@
 {
 	struct stlport	*portp;
 
-	if (tty == NULL)
-		return -ENODEV;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return -ENODEV;
@@ -1232,8 +1222,6 @@
 	struct stlport	*portp;
 	int rts = -1, dtr = -1;
 
-	if (tty == NULL)
-		return -ENODEV;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return -ENODEV;
@@ -1262,8 +1250,6 @@
 	pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
 			arg);
 
-	if (tty == NULL)
-		return -ENODEV;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return -ENODEV;
@@ -1282,10 +1268,10 @@
 		rc = stl_getserial(portp, argp);
 		break;
 	case TIOCSSERIAL:
-		rc = stl_setserial(portp, argp);
+		rc = stl_setserial(tty, argp);
 		break;
 	case COM_GETPORTSTATS:
-		rc = stl_getportstats(portp, argp);
+		rc = stl_getportstats(tty, portp, argp);
 		break;
 	case COM_CLRPORTSTATS:
 		rc = stl_clrportstats(portp, argp);
@@ -1317,8 +1303,6 @@
 
 	pr_debug("stl_start(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1334,8 +1318,6 @@
 
 	pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1369,8 +1351,6 @@
 
 	pr_debug("stl_throttle(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1389,8 +1369,6 @@
 
 	pr_debug("stl_unthrottle(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1410,8 +1388,6 @@
 
 	pr_debug("stl_stop(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1432,8 +1408,6 @@
 
 	pr_debug("stl_hangup(tty=%p)\n", tty);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1452,7 +1426,7 @@
 		portp->tx.head = NULL;
 		portp->tx.tail = NULL;
 	}
-	portp->port.tty = NULL;
+	tty_port_tty_set(&portp->port, NULL);
 	portp->port.flags &= ~ASYNC_NORMAL_ACTIVE;
 	portp->port.count = 0;
 	wake_up_interruptible(&portp->port.open_wait);
@@ -1466,8 +1440,6 @@
 
 	pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
 
-	if (tty == NULL)
-		return -EINVAL;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return -EINVAL;
@@ -1484,8 +1456,6 @@
 
 	pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
 
-	if (tty == NULL)
-		return;
 	portp = tty->driver_data;
 	if (portp == NULL)
 		return;
@@ -1805,7 +1775,7 @@
 				"(size=%Zd)\n", sizeof(struct stlport));
 			break;
 		}
-
+		tty_port_init(&portp->port);
 		portp->magic = STL_PORTMAGIC;
 		portp->portnr = i;
 		portp->brdnr = panelp->brdnr;
@@ -1832,6 +1802,7 @@
 	struct stlpanel *panelp;
 	struct stlport *portp;
 	unsigned int j, k;
+	struct tty_struct *tty;
 
 	for (j = 0; j < STL_MAXPANELS; j++) {
 		panelp = brdp->panels[j];
@@ -1841,8 +1812,11 @@
 			portp = panelp->ports[k];
 			if (portp == NULL)
 				continue;
-			if (portp->port.tty != NULL)
-				stl_hangup(portp->port.tty);
+			tty = tty_port_tty_get(&portp->port);
+			if (tty != NULL) {
+				stl_hangup(tty);
+				tty_kref_put(tty);
+			}
 			kfree(portp->tx.buf);
 			kfree(portp);
 		}
@@ -2498,7 +2472,7 @@
  *	what port to get stats for (used through board control device).
  */
 
-static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
+static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp)
 {
 	comstats_t	stl_comstats;
 	unsigned char	*head, *tail;
@@ -2525,18 +2499,17 @@
 	portp->stats.rxbuffered = 0;
 
 	spin_lock_irqsave(&stallion_lock, flags);
-	if (portp->port.tty != NULL)
-		if (portp->port.tty->driver_data == portp) {
-			portp->stats.ttystate = portp->port.tty->flags;
-			/* No longer available as a statistic */
-			portp->stats.rxbuffered = 1; /*portp->port.tty->flip.count; */
-			if (portp->port.tty->termios != NULL) {
-				portp->stats.cflags = portp->port.tty->termios->c_cflag;
-				portp->stats.iflags = portp->port.tty->termios->c_iflag;
-				portp->stats.oflags = portp->port.tty->termios->c_oflag;
-				portp->stats.lflags = portp->port.tty->termios->c_lflag;
-			}
+	if (tty != NULL && portp->port.tty == tty) {
+		portp->stats.ttystate = tty->flags;
+		/* No longer available as a statistic */
+		portp->stats.rxbuffered = 1; /*tty->flip.count; */
+		if (tty->termios != NULL) {
+			portp->stats.cflags = tty->termios->c_cflag;
+			portp->stats.iflags = tty->termios->c_iflag;
+			portp->stats.oflags = tty->termios->c_oflag;
+			portp->stats.lflags = tty->termios->c_lflag;
 		}
+	}
 	spin_unlock_irqrestore(&stallion_lock, flags);
 
 	head = portp->tx.head;
@@ -2640,7 +2613,7 @@
 
 	switch (cmd) {
 	case COM_GETPORTSTATS:
-		rc = stl_getportstats(NULL, argp);
+		rc = stl_getportstats(NULL, NULL, argp);
 		break;
 	case COM_CLRPORTSTATS:
 		rc = stl_clrportstats(NULL, argp);
@@ -3243,7 +3216,7 @@
 
 	if (portp == NULL)
 		return;
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	if (tty == NULL)
 		return;
 
@@ -3288,6 +3261,7 @@
 
 	BRDDISABLE(portp->brdnr);
 	spin_unlock_irqrestore(&brd_lock, flags);
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
@@ -3305,7 +3279,7 @@
 
 	if (portp == NULL)
 		return;
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	if (tty == NULL)
 		return;
 
@@ -3325,6 +3299,7 @@
 	}
 	BRDDISABLE(portp->brdnr);
 	spin_unlock_irqrestore(&brd_lock, flags);
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
@@ -3478,6 +3453,7 @@
 	int		len, stlen;
 	char		*head, *tail;
 	unsigned char	ioack, srer;
+	struct tty_struct *tty;
 
 	pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
 
@@ -3504,8 +3480,11 @@
 	if ((len == 0) || ((len < STL_TXBUFLOW) &&
 	    (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
 		set_bit(ASYI_TXLOW, &portp->istate);
-		if (portp->port.tty)
-			tty_wakeup(portp->port.tty);
+		tty = tty_port_tty_get(&portp->port);
+		if (tty) {
+			tty_wakeup(tty);
+			tty_kref_put(tty);
+		}
 	}
 
 	if (len == 0) {
@@ -3569,7 +3548,7 @@
 		return;
 	}
 	portp = panelp->ports[(ioack >> 3)];
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 
 	if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
 		outb((RDCR + portp->uartaddr), ioaddr);
@@ -3633,10 +3612,12 @@
 		}
 	} else {
 		printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
+		tty_kref_put(tty);
 		return;
 	}
 
 stl_rxalldone:
+	tty_kref_put(tty);
 	outb((EOSRR + portp->uartaddr), ioaddr);
 	outb(0, (ioaddr + EREG_DATA));
 }
@@ -4175,7 +4156,7 @@
 
 	if (portp == NULL)
 		return;
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	if (tty == NULL)
 		return;
 
@@ -4226,6 +4207,7 @@
 
 	BRDDISABLE(portp->brdnr);
 	spin_unlock_irqrestore(&brd_lock, flags);
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
@@ -4244,7 +4226,7 @@
 
 	if (portp == NULL)
 		return;
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	if (tty == NULL)
 		return;
 
@@ -4269,6 +4251,7 @@
 	}
 	BRDDISABLE(portp->brdnr);
 	spin_unlock_irqrestore(&brd_lock, flags);
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
@@ -4408,6 +4391,7 @@
 
 static void stl_sc26198txisr(struct stlport *portp)
 {
+	struct tty_struct *tty;
 	unsigned int	ioaddr;
 	unsigned char	mr0;
 	int		len, stlen;
@@ -4422,8 +4406,11 @@
 	if ((len == 0) || ((len < STL_TXBUFLOW) &&
 	    (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
 		set_bit(ASYI_TXLOW, &portp->istate);
-		if (portp->port.tty)
-			tty_wakeup(portp->port.tty);
+		tty = tty_port_tty_get(&portp->port);
+		if (tty) {
+			tty_wakeup(tty);
+			tty_kref_put(tty);
+		}
 	}
 
 	if (len == 0) {
@@ -4476,7 +4463,7 @@
 
 	pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
 
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	ioaddr = portp->ioaddr;
 	outb(GIBCR, (ioaddr + XP_ADDR));
 	len = inb(ioaddr + XP_DATA) + 1;
@@ -4515,6 +4502,7 @@
 			stl_sc26198txunflow(portp, tty);
 		}
 	}
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
@@ -4528,7 +4516,7 @@
 	struct tty_struct	*tty;
 	unsigned int		ioaddr;
 
-	tty = portp->port.tty;
+	tty = tty_port_tty_get(&portp->port);
 	ioaddr = portp->ioaddr;
 
 	if (status & SR_RXPARITY)
@@ -4566,6 +4554,7 @@
 		if (status == 0)
 			portp->stats.rxtotal++;
 	}
+	tty_kref_put(tty);
 }
 
 /*****************************************************************************/
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index c385206..5b8d7a1 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -2504,7 +2504,7 @@
 		del_timer(&board->timer);
 		if (pdev) {
 #ifdef CONFIG_PCI
-			pci_iounmap(pdev, board->base);
+			pci_iounmap(pdev, board->base2);
 			pci_release_region(pdev, IS_CF_BOARD(board) ? 3 : 2);
 #endif
 		} else {
@@ -2703,7 +2703,7 @@
 
 	return 0;
 err_unmap:
-	pci_iounmap(pdev, board->base);
+	pci_iounmap(pdev, board->base2);
 err_reg:
 	pci_release_region(pdev, reg);
 err_flag:
diff --git a/drivers/char/tty_audit.c b/drivers/char/tty_audit.c
index 3582f43..5787249 100644
--- a/drivers/char/tty_audit.c
+++ b/drivers/char/tty_audit.c
@@ -93,7 +93,7 @@
 		get_task_comm(name, tsk);
 		audit_log_untrustedstring(ab, name);
 		audit_log_format(ab, " data=");
-		audit_log_n_untrustedstring(ab, buf->data, buf->valid);
+		audit_log_n_hex(ab, buf->data, buf->valid);
 		audit_log_end(ab);
 	}
 	buf->valid = 0;
diff --git a/drivers/char/tty_buffer.c b/drivers/char/tty_buffer.c
new file mode 100644
index 0000000..810ee25
--- /dev/null
+++ b/drivers/char/tty_buffer.c
@@ -0,0 +1,511 @@
+/*
+ * Tty buffer allocation management
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/wait.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+
+/**
+ *	tty_buffer_free_all		-	free buffers used by a tty
+ *	@tty: tty to free from
+ *
+ *	Remove all the buffers pending on a tty whether queued with data
+ *	or in the free ring. Must be called when the tty is no longer in use
+ *
+ *	Locking: none
+ */
+
+void tty_buffer_free_all(struct tty_struct *tty)
+{
+	struct tty_buffer *thead;
+	while ((thead = tty->buf.head) != NULL) {
+		tty->buf.head = thead->next;
+		kfree(thead);
+	}
+	while ((thead = tty->buf.free) != NULL) {
+		tty->buf.free = thead->next;
+		kfree(thead);
+	}
+	tty->buf.tail = NULL;
+	tty->buf.memory_used = 0;
+}
+
+/**
+ *	tty_buffer_alloc	-	allocate a tty buffer
+ *	@tty: tty device
+ *	@size: desired size (characters)
+ *
+ *	Allocate a new tty buffer to hold the desired number of characters.
+ *	Return NULL if out of memory or the allocation would exceed the
+ *	per device queue
+ *
+ *	Locking: Caller must hold tty->buf.lock
+ */
+
+static struct tty_buffer *tty_buffer_alloc(struct tty_struct *tty, size_t size)
+{
+	struct tty_buffer *p;
+
+	if (tty->buf.memory_used + size > 65536)
+		return NULL;
+	p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC);
+	if (p == NULL)
+		return NULL;
+	p->used = 0;
+	p->size = size;
+	p->next = NULL;
+	p->commit = 0;
+	p->read = 0;
+	p->char_buf_ptr = (char *)(p->data);
+	p->flag_buf_ptr = (unsigned char *)p->char_buf_ptr + size;
+	tty->buf.memory_used += size;
+	return p;
+}
+
+/**
+ *	tty_buffer_free		-	free a tty buffer
+ *	@tty: tty owning the buffer
+ *	@b: the buffer to free
+ *
+ *	Free a tty buffer, or add it to the free list according to our
+ *	internal strategy
+ *
+ *	Locking: Caller must hold tty->buf.lock
+ */
+
+static void tty_buffer_free(struct tty_struct *tty, struct tty_buffer *b)
+{
+	/* Dumb strategy for now - should keep some stats */
+	tty->buf.memory_used -= b->size;
+	WARN_ON(tty->buf.memory_used < 0);
+
+	if (b->size >= 512)
+		kfree(b);
+	else {
+		b->next = tty->buf.free;
+		tty->buf.free = b;
+	}
+}
+
+/**
+ *	__tty_buffer_flush		-	flush full tty buffers
+ *	@tty: tty to flush
+ *
+ *	flush all the buffers containing receive data. Caller must
+ *	hold the buffer lock and must have ensured no parallel flush to
+ *	ldisc is running.
+ *
+ *	Locking: Caller must hold tty->buf.lock
+ */
+
+static void __tty_buffer_flush(struct tty_struct *tty)
+{
+	struct tty_buffer *thead;
+
+	while ((thead = tty->buf.head) != NULL) {
+		tty->buf.head = thead->next;
+		tty_buffer_free(tty, thead);
+	}
+	tty->buf.tail = NULL;
+}
+
+/**
+ *	tty_buffer_flush		-	flush full tty buffers
+ *	@tty: tty to flush
+ *
+ *	flush all the buffers containing receive data. If the buffer is
+ *	being processed by flush_to_ldisc then we defer the processing
+ *	to that function
+ *
+ *	Locking: none
+ */
+
+void tty_buffer_flush(struct tty_struct *tty)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&tty->buf.lock, flags);
+
+	/* If the data is being pushed to the tty layer then we can't
+	   process it here. Instead set a flag and the flush_to_ldisc
+	   path will process the flush request before it exits */
+	if (test_bit(TTY_FLUSHING, &tty->flags)) {
+		set_bit(TTY_FLUSHPENDING, &tty->flags);
+		spin_unlock_irqrestore(&tty->buf.lock, flags);
+		wait_event(tty->read_wait,
+				test_bit(TTY_FLUSHPENDING, &tty->flags) == 0);
+		return;
+	} else
+		__tty_buffer_flush(tty);
+	spin_unlock_irqrestore(&tty->buf.lock, flags);
+}
+
+/**
+ *	tty_buffer_find		-	find a free tty buffer
+ *	@tty: tty owning the buffer
+ *	@size: characters wanted
+ *
+ *	Locate an existing suitable tty buffer or if we are lacking one then
+ *	allocate a new one. We round our buffers off in 256 character chunks
+ *	to get better allocation behaviour.
+ *
+ *	Locking: Caller must hold tty->buf.lock
+ */
+
+static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size)
+{
+	struct tty_buffer **tbh = &tty->buf.free;
+	while ((*tbh) != NULL) {
+		struct tty_buffer *t = *tbh;
+		if (t->size >= size) {
+			*tbh = t->next;
+			t->next = NULL;
+			t->used = 0;
+			t->commit = 0;
+			t->read = 0;
+			tty->buf.memory_used += t->size;
+			return t;
+		}
+		tbh = &((*tbh)->next);
+	}
+	/* Round the buffer size out */
+	size = (size + 0xFF) & ~0xFF;
+	return tty_buffer_alloc(tty, size);
+	/* Should possibly check if this fails for the largest buffer we
+	   have queued and recycle that ? */
+}
+
+/**
+ *	tty_buffer_request_room		-	grow tty buffer if needed
+ *	@tty: tty structure
+ *	@size: size desired
+ *
+ *	Make at least size bytes of linear space available for the tty
+ *	buffer. If we fail return the size we managed to find.
+ *
+ *	Locking: Takes tty->buf.lock
+ */
+int tty_buffer_request_room(struct tty_struct *tty, size_t size)
+{
+	struct tty_buffer *b, *n;
+	int left;
+	unsigned long flags;
+
+	spin_lock_irqsave(&tty->buf.lock, flags);
+
+	/* OPTIMISATION: We could keep a per tty "zero" sized buffer to
+	   remove this conditional if its worth it. This would be invisible
+	   to the callers */
+	if ((b = tty->buf.tail) != NULL)
+		left = b->size - b->used;
+	else
+		left = 0;
+
+	if (left < size) {
+		/* This is the slow path - looking for new buffers to use */
+		if ((n = tty_buffer_find(tty, size)) != NULL) {
+			if (b != NULL) {
+				b->next = n;
+				b->commit = b->used;
+			} else
+				tty->buf.head = n;
+			tty->buf.tail = n;
+		} else
+			size = left;
+	}
+
+	spin_unlock_irqrestore(&tty->buf.lock, flags);
+	return size;
+}
+EXPORT_SYMBOL_GPL(tty_buffer_request_room);
+
+/**
+ *	tty_insert_flip_string	-	Add characters to the tty buffer
+ *	@tty: tty structure
+ *	@chars: characters
+ *	@size: size
+ *
+ *	Queue a series of bytes to the tty buffering. All the characters
+ *	passed are marked as without error. Returns the number added.
+ *
+ *	Locking: Called functions may take tty->buf.lock
+ */
+
+int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
+				size_t size)
+{
+	int copied = 0;
+	do {
+		int space = tty_buffer_request_room(tty, size - copied);
+		struct tty_buffer *tb = tty->buf.tail;
+		/* If there is no space then tb may be NULL */
+		if (unlikely(space == 0))
+			break;
+		memcpy(tb->char_buf_ptr + tb->used, chars, space);
+		memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
+		tb->used += space;
+		copied += space;
+		chars += space;
+		/* There is a small chance that we need to split the data over
+		   several buffers. If this is the case we must loop */
+	} while (unlikely(size > copied));
+	return copied;
+}
+EXPORT_SYMBOL(tty_insert_flip_string);
+
+/**
+ *	tty_insert_flip_string_flags	-	Add characters to the tty buffer
+ *	@tty: tty structure
+ *	@chars: characters
+ *	@flags: flag bytes
+ *	@size: size
+ *
+ *	Queue a series of bytes to the tty buffering. For each character
+ *	the flags array indicates the status of the character. Returns the
+ *	number added.
+ *
+ *	Locking: Called functions may take tty->buf.lock
+ */
+
+int tty_insert_flip_string_flags(struct tty_struct *tty,
+		const unsigned char *chars, const char *flags, size_t size)
+{
+	int copied = 0;
+	do {
+		int space = tty_buffer_request_room(tty, size - copied);
+		struct tty_buffer *tb = tty->buf.tail;
+		/* If there is no space then tb may be NULL */
+		if (unlikely(space == 0))
+			break;
+		memcpy(tb->char_buf_ptr + tb->used, chars, space);
+		memcpy(tb->flag_buf_ptr + tb->used, flags, space);
+		tb->used += space;
+		copied += space;
+		chars += space;
+		flags += space;
+		/* There is a small chance that we need to split the data over
+		   several buffers. If this is the case we must loop */
+	} while (unlikely(size > copied));
+	return copied;
+}
+EXPORT_SYMBOL(tty_insert_flip_string_flags);
+
+/**
+ *	tty_schedule_flip	-	push characters to ldisc
+ *	@tty: tty to push from
+ *
+ *	Takes any pending buffers and transfers their ownership to the
+ *	ldisc side of the queue. It then schedules those characters for
+ *	processing by the line discipline.
+ *
+ *	Locking: Takes tty->buf.lock
+ */
+
+void tty_schedule_flip(struct tty_struct *tty)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&tty->buf.lock, flags);
+	if (tty->buf.tail != NULL)
+		tty->buf.tail->commit = tty->buf.tail->used;
+	spin_unlock_irqrestore(&tty->buf.lock, flags);
+	schedule_delayed_work(&tty->buf.work, 1);
+}
+EXPORT_SYMBOL(tty_schedule_flip);
+
+/**
+ *	tty_prepare_flip_string		-	make room for characters
+ *	@tty: tty
+ *	@chars: return pointer for character write area
+ *	@size: desired size
+ *
+ *	Prepare a block of space in the buffer for data. Returns the length
+ *	available and buffer pointer to the space which is now allocated and
+ *	accounted for as ready for normal characters. This is used for drivers
+ *	that need their own block copy routines into the buffer. There is no
+ *	guarantee the buffer is a DMA target!
+ *
+ *	Locking: May call functions taking tty->buf.lock
+ */
+
+int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars,
+								size_t size)
+{
+	int space = tty_buffer_request_room(tty, size);
+	if (likely(space)) {
+		struct tty_buffer *tb = tty->buf.tail;
+		*chars = tb->char_buf_ptr + tb->used;
+		memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
+		tb->used += space;
+	}
+	return space;
+}
+EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
+
+/**
+ *	tty_prepare_flip_string_flags	-	make room for characters
+ *	@tty: tty
+ *	@chars: return pointer for character write area
+ *	@flags: return pointer for status flag write area
+ *	@size: desired size
+ *
+ *	Prepare a block of space in the buffer for data. Returns the length
+ *	available and buffer pointer to the space which is now allocated and
+ *	accounted for as ready for characters. This is used for drivers
+ *	that need their own block copy routines into the buffer. There is no
+ *	guarantee the buffer is a DMA target!
+ *
+ *	Locking: May call functions taking tty->buf.lock
+ */
+
+int tty_prepare_flip_string_flags(struct tty_struct *tty,
+			unsigned char **chars, char **flags, size_t size)
+{
+	int space = tty_buffer_request_room(tty, size);
+	if (likely(space)) {
+		struct tty_buffer *tb = tty->buf.tail;
+		*chars = tb->char_buf_ptr + tb->used;
+		*flags = tb->flag_buf_ptr + tb->used;
+		tb->used += space;
+	}
+	return space;
+}
+EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags);
+
+
+
+/**
+ *	flush_to_ldisc
+ *	@work: tty structure passed from work queue.
+ *
+ *	This routine is called out of the software interrupt to flush data
+ *	from the buffer chain to the line discipline.
+ *
+ *	Locking: holds tty->buf.lock to guard buffer list. Drops the lock
+ *	while invoking the line discipline receive_buf method. The
+ *	receive_buf method is single threaded for each tty instance.
+ */
+
+static void flush_to_ldisc(struct work_struct *work)
+{
+	struct tty_struct *tty =
+		container_of(work, struct tty_struct, buf.work.work);
+	unsigned long 	flags;
+	struct tty_ldisc *disc;
+	struct tty_buffer *tbuf, *head;
+	char *char_buf;
+	unsigned char *flag_buf;
+
+	disc = tty_ldisc_ref(tty);
+	if (disc == NULL)	/*  !TTY_LDISC */
+		return;
+
+	spin_lock_irqsave(&tty->buf.lock, flags);
+	/* So we know a flush is running */
+	set_bit(TTY_FLUSHING, &tty->flags);
+	head = tty->buf.head;
+	if (head != NULL) {
+		tty->buf.head = NULL;
+		for (;;) {
+			int count = head->commit - head->read;
+			if (!count) {
+				if (head->next == NULL)
+					break;
+				tbuf = head;
+				head = head->next;
+				tty_buffer_free(tty, tbuf);
+				continue;
+			}
+			/* Ldisc or user is trying to flush the buffers
+			   we are feeding to the ldisc, stop feeding the
+			   line discipline as we want to empty the queue */
+			if (test_bit(TTY_FLUSHPENDING, &tty->flags))
+				break;
+			if (!tty->receive_room) {
+				schedule_delayed_work(&tty->buf.work, 1);
+				break;
+			}
+			if (count > tty->receive_room)
+				count = tty->receive_room;
+			char_buf = head->char_buf_ptr + head->read;
+			flag_buf = head->flag_buf_ptr + head->read;
+			head->read += count;
+			spin_unlock_irqrestore(&tty->buf.lock, flags);
+			disc->ops->receive_buf(tty, char_buf,
+							flag_buf, count);
+			spin_lock_irqsave(&tty->buf.lock, flags);
+		}
+		/* Restore the queue head */
+		tty->buf.head = head;
+	}
+	/* We may have a deferred request to flush the input buffer,
+	   if so pull the chain under the lock and empty the queue */
+	if (test_bit(TTY_FLUSHPENDING, &tty->flags)) {
+		__tty_buffer_flush(tty);
+		clear_bit(TTY_FLUSHPENDING, &tty->flags);
+		wake_up(&tty->read_wait);
+	}
+	clear_bit(TTY_FLUSHING, &tty->flags);
+	spin_unlock_irqrestore(&tty->buf.lock, flags);
+
+	tty_ldisc_deref(disc);
+}
+
+/**
+ *	tty_flip_buffer_push	-	terminal
+ *	@tty: tty to push
+ *
+ *	Queue a push of the terminal flip buffers to the line discipline. This
+ *	function must not be called from IRQ context if tty->low_latency is set.
+ *
+ *	In the event of the queue being busy for flipping the work will be
+ *	held off and retried later.
+ *
+ *	Locking: tty buffer lock. Driver locks in low latency mode.
+ */
+
+void tty_flip_buffer_push(struct tty_struct *tty)
+{
+	unsigned long flags;
+	spin_lock_irqsave(&tty->buf.lock, flags);
+	if (tty->buf.tail != NULL)
+		tty->buf.tail->commit = tty->buf.tail->used;
+	spin_unlock_irqrestore(&tty->buf.lock, flags);
+
+	if (tty->low_latency)
+		flush_to_ldisc(&tty->buf.work.work);
+	else
+		schedule_delayed_work(&tty->buf.work, 1);
+}
+EXPORT_SYMBOL(tty_flip_buffer_push);
+
+/**
+ *	tty_buffer_init		-	prepare a tty buffer structure
+ *	@tty: tty to initialise
+ *
+ *	Set up the initial state of the buffer management for a tty device.
+ *	Must be called before the other tty buffer functions are used.
+ *
+ *	Locking: none
+ */
+
+void tty_buffer_init(struct tty_struct *tty)
+{
+	spin_lock_init(&tty->buf.lock);
+	tty->buf.head = NULL;
+	tty->buf.tail = NULL;
+	tty->buf.free = NULL;
+	tty->buf.memory_used = 0;
+	INIT_DELAYED_WORK(&tty->buf.work, flush_to_ldisc);
+}
+
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index e4dce87..7053d63 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -49,7 +49,7 @@
  * implement CONFIG_VT and generalize console device interface.
  *	-- Marko Kohtala <Marko.Kohtala@hut.fi>, March 97
  *
- * Rewrote init_dev and release_dev to eliminate races.
+ * Rewrote tty_init_dev and tty_release_dev to eliminate races.
  *	-- Bill Hawes <whawes@star.net>, June 97
  *
  * Added devfs support.
@@ -136,13 +136,6 @@
 DEFINE_MUTEX(tty_mutex);
 EXPORT_SYMBOL(tty_mutex);
 
-#ifdef CONFIG_UNIX98_PTYS
-extern struct tty_driver *ptm_driver;	/* Unix98 pty masters; for /dev/ptmx */
-static int ptmx_open(struct inode *, struct file *);
-#endif
-
-static void initialize_tty_struct(struct tty_struct *tty);
-
 static ssize_t tty_read(struct file *, char __user *, size_t, loff_t *);
 static ssize_t tty_write(struct file *, const char __user *, size_t, loff_t *);
 ssize_t redirected_tty_write(struct file *, const char __user *,
@@ -171,13 +164,11 @@
  *	Locking: none
  */
 
-static struct tty_struct *alloc_tty_struct(void)
+struct tty_struct *alloc_tty_struct(void)
 {
 	return kzalloc(sizeof(struct tty_struct), GFP_KERNEL);
 }
 
-static void tty_buffer_free_all(struct tty_struct *);
-
 /**
  *	free_tty_struct		-	free a disused tty
  *	@tty: tty struct to free
@@ -187,7 +178,7 @@
  *	Locking: none. Must be called after tty is definitely unused
  */
 
-static inline void free_tty_struct(struct tty_struct *tty)
+void free_tty_struct(struct tty_struct *tty)
 {
 	kfree(tty->write_buf);
 	tty_buffer_free_all(tty);
@@ -263,398 +254,6 @@
 	return 0;
 }
 
-/*
- * Tty buffer allocation management
- */
-
-/**
- *	tty_buffer_free_all		-	free buffers used by a tty
- *	@tty: tty to free from
- *
- *	Remove all the buffers pending on a tty whether queued with data
- *	or in the free ring. Must be called when the tty is no longer in use
- *
- *	Locking: none
- */
-
-static void tty_buffer_free_all(struct tty_struct *tty)
-{
-	struct tty_buffer *thead;
-	while ((thead = tty->buf.head) != NULL) {
-		tty->buf.head = thead->next;
-		kfree(thead);
-	}
-	while ((thead = tty->buf.free) != NULL) {
-		tty->buf.free = thead->next;
-		kfree(thead);
-	}
-	tty->buf.tail = NULL;
-	tty->buf.memory_used = 0;
-}
-
-/**
- *	tty_buffer_init		-	prepare a tty buffer structure
- *	@tty: tty to initialise
- *
- *	Set up the initial state of the buffer management for a tty device.
- *	Must be called before the other tty buffer functions are used.
- *
- *	Locking: none
- */
-
-static void tty_buffer_init(struct tty_struct *tty)
-{
-	spin_lock_init(&tty->buf.lock);
-	tty->buf.head = NULL;
-	tty->buf.tail = NULL;
-	tty->buf.free = NULL;
-	tty->buf.memory_used = 0;
-}
-
-/**
- *	tty_buffer_alloc	-	allocate a tty buffer
- *	@tty: tty device
- *	@size: desired size (characters)
- *
- *	Allocate a new tty buffer to hold the desired number of characters.
- *	Return NULL if out of memory or the allocation would exceed the
- *	per device queue
- *
- *	Locking: Caller must hold tty->buf.lock
- */
-
-static struct tty_buffer *tty_buffer_alloc(struct tty_struct *tty, size_t size)
-{
-	struct tty_buffer *p;
-
-	if (tty->buf.memory_used + size > 65536)
-		return NULL;
-	p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC);
-	if (p == NULL)
-		return NULL;
-	p->used = 0;
-	p->size = size;
-	p->next = NULL;
-	p->commit = 0;
-	p->read = 0;
-	p->char_buf_ptr = (char *)(p->data);
-	p->flag_buf_ptr = (unsigned char *)p->char_buf_ptr + size;
-	tty->buf.memory_used += size;
-	return p;
-}
-
-/**
- *	tty_buffer_free		-	free a tty buffer
- *	@tty: tty owning the buffer
- *	@b: the buffer to free
- *
- *	Free a tty buffer, or add it to the free list according to our
- *	internal strategy
- *
- *	Locking: Caller must hold tty->buf.lock
- */
-
-static void tty_buffer_free(struct tty_struct *tty, struct tty_buffer *b)
-{
-	/* Dumb strategy for now - should keep some stats */
-	tty->buf.memory_used -= b->size;
-	WARN_ON(tty->buf.memory_used < 0);
-
-	if (b->size >= 512)
-		kfree(b);
-	else {
-		b->next = tty->buf.free;
-		tty->buf.free = b;
-	}
-}
-
-/**
- *	__tty_buffer_flush		-	flush full tty buffers
- *	@tty: tty to flush
- *
- *	flush all the buffers containing receive data. Caller must
- *	hold the buffer lock and must have ensured no parallel flush to
- *	ldisc is running.
- *
- *	Locking: Caller must hold tty->buf.lock
- */
-
-static void __tty_buffer_flush(struct tty_struct *tty)
-{
-	struct tty_buffer *thead;
-
-	while ((thead = tty->buf.head) != NULL) {
-		tty->buf.head = thead->next;
-		tty_buffer_free(tty, thead);
-	}
-	tty->buf.tail = NULL;
-}
-
-/**
- *	tty_buffer_flush		-	flush full tty buffers
- *	@tty: tty to flush
- *
- *	flush all the buffers containing receive data. If the buffer is
- *	being processed by flush_to_ldisc then we defer the processing
- *	to that function
- *
- *	Locking: none
- */
-
-static void tty_buffer_flush(struct tty_struct *tty)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&tty->buf.lock, flags);
-
-	/* If the data is being pushed to the tty layer then we can't
-	   process it here. Instead set a flag and the flush_to_ldisc
-	   path will process the flush request before it exits */
-	if (test_bit(TTY_FLUSHING, &tty->flags)) {
-		set_bit(TTY_FLUSHPENDING, &tty->flags);
-		spin_unlock_irqrestore(&tty->buf.lock, flags);
-		wait_event(tty->read_wait,
-				test_bit(TTY_FLUSHPENDING, &tty->flags) == 0);
-		return;
-	} else
-		__tty_buffer_flush(tty);
-	spin_unlock_irqrestore(&tty->buf.lock, flags);
-}
-
-/**
- *	tty_buffer_find		-	find a free tty buffer
- *	@tty: tty owning the buffer
- *	@size: characters wanted
- *
- *	Locate an existing suitable tty buffer or if we are lacking one then
- *	allocate a new one. We round our buffers off in 256 character chunks
- *	to get better allocation behaviour.
- *
- *	Locking: Caller must hold tty->buf.lock
- */
-
-static struct tty_buffer *tty_buffer_find(struct tty_struct *tty, size_t size)
-{
-	struct tty_buffer **tbh = &tty->buf.free;
-	while ((*tbh) != NULL) {
-		struct tty_buffer *t = *tbh;
-		if (t->size >= size) {
-			*tbh = t->next;
-			t->next = NULL;
-			t->used = 0;
-			t->commit = 0;
-			t->read = 0;
-			tty->buf.memory_used += t->size;
-			return t;
-		}
-		tbh = &((*tbh)->next);
-	}
-	/* Round the buffer size out */
-	size = (size + 0xFF) & ~0xFF;
-	return tty_buffer_alloc(tty, size);
-	/* Should possibly check if this fails for the largest buffer we
-	   have queued and recycle that ? */
-}
-
-/**
- *	tty_buffer_request_room		-	grow tty buffer if needed
- *	@tty: tty structure
- *	@size: size desired
- *
- *	Make at least size bytes of linear space available for the tty
- *	buffer. If we fail return the size we managed to find.
- *
- *	Locking: Takes tty->buf.lock
- */
-int tty_buffer_request_room(struct tty_struct *tty, size_t size)
-{
-	struct tty_buffer *b, *n;
-	int left;
-	unsigned long flags;
-
-	spin_lock_irqsave(&tty->buf.lock, flags);
-
-	/* OPTIMISATION: We could keep a per tty "zero" sized buffer to
-	   remove this conditional if its worth it. This would be invisible
-	   to the callers */
-	if ((b = tty->buf.tail) != NULL)
-		left = b->size - b->used;
-	else
-		left = 0;
-
-	if (left < size) {
-		/* This is the slow path - looking for new buffers to use */
-		if ((n = tty_buffer_find(tty, size)) != NULL) {
-			if (b != NULL) {
-				b->next = n;
-				b->commit = b->used;
-			} else
-				tty->buf.head = n;
-			tty->buf.tail = n;
-		} else
-			size = left;
-	}
-
-	spin_unlock_irqrestore(&tty->buf.lock, flags);
-	return size;
-}
-EXPORT_SYMBOL_GPL(tty_buffer_request_room);
-
-/**
- *	tty_insert_flip_string	-	Add characters to the tty buffer
- *	@tty: tty structure
- *	@chars: characters
- *	@size: size
- *
- *	Queue a series of bytes to the tty buffering. All the characters
- *	passed are marked as without error. Returns the number added.
- *
- *	Locking: Called functions may take tty->buf.lock
- */
-
-int tty_insert_flip_string(struct tty_struct *tty, const unsigned char *chars,
-				size_t size)
-{
-	int copied = 0;
-	do {
-		int space = tty_buffer_request_room(tty, size - copied);
-		struct tty_buffer *tb = tty->buf.tail;
-		/* If there is no space then tb may be NULL */
-		if (unlikely(space == 0))
-			break;
-		memcpy(tb->char_buf_ptr + tb->used, chars, space);
-		memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
-		tb->used += space;
-		copied += space;
-		chars += space;
-		/* There is a small chance that we need to split the data over
-		   several buffers. If this is the case we must loop */
-	} while (unlikely(size > copied));
-	return copied;
-}
-EXPORT_SYMBOL(tty_insert_flip_string);
-
-/**
- *	tty_insert_flip_string_flags	-	Add characters to the tty buffer
- *	@tty: tty structure
- *	@chars: characters
- *	@flags: flag bytes
- *	@size: size
- *
- *	Queue a series of bytes to the tty buffering. For each character
- *	the flags array indicates the status of the character. Returns the
- *	number added.
- *
- *	Locking: Called functions may take tty->buf.lock
- */
-
-int tty_insert_flip_string_flags(struct tty_struct *tty,
-		const unsigned char *chars, const char *flags, size_t size)
-{
-	int copied = 0;
-	do {
-		int space = tty_buffer_request_room(tty, size - copied);
-		struct tty_buffer *tb = tty->buf.tail;
-		/* If there is no space then tb may be NULL */
-		if (unlikely(space == 0))
-			break;
-		memcpy(tb->char_buf_ptr + tb->used, chars, space);
-		memcpy(tb->flag_buf_ptr + tb->used, flags, space);
-		tb->used += space;
-		copied += space;
-		chars += space;
-		flags += space;
-		/* There is a small chance that we need to split the data over
-		   several buffers. If this is the case we must loop */
-	} while (unlikely(size > copied));
-	return copied;
-}
-EXPORT_SYMBOL(tty_insert_flip_string_flags);
-
-/**
- *	tty_schedule_flip	-	push characters to ldisc
- *	@tty: tty to push from
- *
- *	Takes any pending buffers and transfers their ownership to the
- *	ldisc side of the queue. It then schedules those characters for
- *	processing by the line discipline.
- *
- *	Locking: Takes tty->buf.lock
- */
-
-void tty_schedule_flip(struct tty_struct *tty)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&tty->buf.lock, flags);
-	if (tty->buf.tail != NULL)
-		tty->buf.tail->commit = tty->buf.tail->used;
-	spin_unlock_irqrestore(&tty->buf.lock, flags);
-	schedule_delayed_work(&tty->buf.work, 1);
-}
-EXPORT_SYMBOL(tty_schedule_flip);
-
-/**
- *	tty_prepare_flip_string		-	make room for characters
- *	@tty: tty
- *	@chars: return pointer for character write area
- *	@size: desired size
- *
- *	Prepare a block of space in the buffer for data. Returns the length
- *	available and buffer pointer to the space which is now allocated and
- *	accounted for as ready for normal characters. This is used for drivers
- *	that need their own block copy routines into the buffer. There is no
- *	guarantee the buffer is a DMA target!
- *
- *	Locking: May call functions taking tty->buf.lock
- */
-
-int tty_prepare_flip_string(struct tty_struct *tty, unsigned char **chars,
-								size_t size)
-{
-	int space = tty_buffer_request_room(tty, size);
-	if (likely(space)) {
-		struct tty_buffer *tb = tty->buf.tail;
-		*chars = tb->char_buf_ptr + tb->used;
-		memset(tb->flag_buf_ptr + tb->used, TTY_NORMAL, space);
-		tb->used += space;
-	}
-	return space;
-}
-
-EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
-
-/**
- *	tty_prepare_flip_string_flags	-	make room for characters
- *	@tty: tty
- *	@chars: return pointer for character write area
- *	@flags: return pointer for status flag write area
- *	@size: desired size
- *
- *	Prepare a block of space in the buffer for data. Returns the length
- *	available and buffer pointer to the space which is now allocated and
- *	accounted for as ready for characters. This is used for drivers
- *	that need their own block copy routines into the buffer. There is no
- *	guarantee the buffer is a DMA target!
- *
- *	Locking: May call functions taking tty->buf.lock
- */
-
-int tty_prepare_flip_string_flags(struct tty_struct *tty,
-			unsigned char **chars, char **flags, size_t size)
-{
-	int space = tty_buffer_request_room(tty, size);
-	if (likely(space)) {
-		struct tty_buffer *tb = tty->buf.tail;
-		*chars = tb->char_buf_ptr + tb->used;
-		*flags = tb->flag_buf_ptr + tb->used;
-		tb->used += space;
-	}
-	return space;
-}
-
-EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags);
-
-
-
 /**
  *	get_tty_driver		-	find device of a tty
  *	@dev_t: device identifier
@@ -675,7 +274,7 @@
 		if (device < base || device >= base + p->num)
 			continue;
 		*index = device - base;
-		return p;
+		return tty_driver_kref_get(p);
 	}
 	return NULL;
 }
@@ -719,7 +318,7 @@
 
 		if (tty_line >= 0 && tty_line <= p->num && p->ops &&
 		    p->ops->poll_init && !p->ops->poll_init(p, tty_line, str)) {
-			res = p;
+			res = tty_driver_kref_get(p);
 			*line = tty_line;
 			break;
 		}
@@ -819,20 +418,6 @@
 	.fasync		= tty_fasync,
 };
 
-#ifdef CONFIG_UNIX98_PTYS
-static const struct file_operations ptmx_fops = {
-	.llseek		= no_llseek,
-	.read		= tty_read,
-	.write		= tty_write,
-	.poll		= tty_poll,
-	.unlocked_ioctl	= tty_ioctl,
-	.compat_ioctl	= tty_compat_ioctl,
-	.open		= ptmx_open,
-	.release	= tty_release,
-	.fasync		= tty_fasync,
-};
-#endif
-
 static const struct file_operations console_fops = {
 	.llseek		= no_llseek,
 	.read		= tty_read,
@@ -953,6 +538,7 @@
 	struct tty_ldisc *ld;
 	int    closecount = 0, n;
 	unsigned long flags;
+	int refs = 0;
 
 	if (!tty)
 		return;
@@ -1019,8 +605,12 @@
 	if (tty->session) {
 		do_each_pid_task(tty->session, PIDTYPE_SID, p) {
 			spin_lock_irq(&p->sighand->siglock);
-			if (p->signal->tty == tty)
+			if (p->signal->tty == tty) {
 				p->signal->tty = NULL;
+				/* We defer the dereferences outside fo
+				   the tasklist lock */
+				refs++;
+			}
 			if (!p->signal->leader) {
 				spin_unlock_irq(&p->sighand->siglock);
 				continue;
@@ -1046,6 +636,10 @@
 	tty->ctrl_status = 0;
 	spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 
+	/* Account for the p->signal references we killed */
+	while (refs--)
+		tty_kref_put(tty);
+
 	/*
 	 * If one of the devices matches a console pointer, we
 	 * cannot just call hangup() because that will cause
@@ -1115,6 +709,23 @@
 EXPORT_SYMBOL(tty_vhangup);
 
 /**
+ *	tty_vhangup_self	-	process vhangup for own ctty
+ *
+ *	Perform a vhangup on the current controlling tty
+ */
+
+void tty_vhangup_self(void)
+{
+	struct tty_struct *tty;
+
+	tty = get_current_tty();
+	if (tty) {
+		tty_vhangup(tty);
+		tty_kref_put(tty);
+	}
+}
+
+/**
  *	tty_hung_up_p		-	was tty hung up
  *	@filp: file pointer of tty
  *
@@ -1167,16 +778,14 @@
 	struct pid *tty_pgrp = NULL;
 
 
-	mutex_lock(&tty_mutex);
 	tty = get_current_tty();
 	if (tty) {
 		tty_pgrp = get_pid(tty->pgrp);
 		lock_kernel();
-		mutex_unlock(&tty_mutex);
-		/* XXX: here we race, there is nothing protecting tty */
 		if (on_exit && tty->driver->type != TTY_DRIVER_TYPE_PTY)
 			tty_vhangup(tty);
 		unlock_kernel();
+		tty_kref_put(tty);
 	} else if (on_exit) {
 		struct pid *old_pgrp;
 		spin_lock_irq(&current->sighand->siglock);
@@ -1188,7 +797,6 @@
 			kill_pgrp(old_pgrp, SIGCONT, on_exit);
 			put_pid(old_pgrp);
 		}
-		mutex_unlock(&tty_mutex);
 		return;
 	}
 	if (tty_pgrp) {
@@ -1203,8 +811,6 @@
 	current->signal->tty_old_pgrp = NULL;
 	spin_unlock_irq(&current->sighand->siglock);
 
-	mutex_lock(&tty_mutex);
-	/* It is possible that do_tty_hangup has free'd this tty */
 	tty = get_current_tty();
 	if (tty) {
 		unsigned long flags;
@@ -1214,13 +820,13 @@
 		tty->session = NULL;
 		tty->pgrp = NULL;
 		spin_unlock_irqrestore(&tty->ctrl_lock, flags);
+		tty_kref_put(tty);
 	} else {
 #ifdef TTY_DEBUG_HANGUP
 		printk(KERN_DEBUG "error attempted to write to tty [0x%p]"
 		       " = NULL", tty);
 #endif
 	}
-	mutex_unlock(&tty_mutex);
 
 	/* Now clear signal->tty under the lock */
 	read_lock(&tasklist_lock);
@@ -1420,19 +1026,19 @@
 
 	/* write_buf/write_cnt is protected by the atomic_write_lock mutex */
 	if (tty->write_cnt < chunk) {
-		unsigned char *buf;
+		unsigned char *buf_chunk;
 
 		if (chunk < 1024)
 			chunk = 1024;
 
-		buf = kmalloc(chunk, GFP_KERNEL);
-		if (!buf) {
+		buf_chunk = kmalloc(chunk, GFP_KERNEL);
+		if (!buf_chunk) {
 			ret = -ENOMEM;
 			goto out;
 		}
 		kfree(tty->write_buf);
 		tty->write_cnt = chunk;
-		tty->write_buf = buf;
+		tty->write_buf = buf_chunk;
 	}
 
 	/* Do the write .. */
@@ -1466,6 +1072,31 @@
 	return ret;
 }
 
+/**
+ * tty_write_message - write a message to a certain tty, not just the console.
+ * @tty: the destination tty_struct
+ * @msg: the message to write
+ *
+ * This is used for messages that need to be redirected to a specific tty.
+ * We don't put it into the syslog queue right now maybe in the future if
+ * really needed.
+ *
+ * We must still hold the BKL and test the CLOSING flag for the moment.
+ */
+
+void tty_write_message(struct tty_struct *tty, char *msg)
+{
+	lock_kernel();
+	if (tty) {
+		mutex_lock(&tty->atomic_write_lock);
+		if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags))
+			tty->ops->write(tty, msg, strlen(msg));
+		tty_write_unlock(tty);
+	}
+	unlock_kernel();
+	return;
+}
+
 
 /**
  *	tty_write		-	write method for tty device file
@@ -1533,42 +1164,6 @@
 	return tty_write(file, buf, count, ppos);
 }
 
-void tty_port_init(struct tty_port *port)
-{
-	memset(port, 0, sizeof(*port));
-	init_waitqueue_head(&port->open_wait);
-	init_waitqueue_head(&port->close_wait);
-	mutex_init(&port->mutex);
-	port->close_delay = (50 * HZ) / 100;
-	port->closing_wait = (3000 * HZ) / 100;
-}
-EXPORT_SYMBOL(tty_port_init);
-
-int tty_port_alloc_xmit_buf(struct tty_port *port)
-{
-	/* We may sleep in get_zeroed_page() */
-	mutex_lock(&port->mutex);
-	if (port->xmit_buf == NULL)
-		port->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
-	mutex_unlock(&port->mutex);
-	if (port->xmit_buf == NULL)
-		return -ENOMEM;
-	return 0;
-}
-EXPORT_SYMBOL(tty_port_alloc_xmit_buf);
-
-void tty_port_free_xmit_buf(struct tty_port *port)
-{
-	mutex_lock(&port->mutex);
-	if (port->xmit_buf != NULL) {
-		free_page((unsigned long)port->xmit_buf);
-		port->xmit_buf = NULL;
-	}
-	mutex_unlock(&port->mutex);
-}
-EXPORT_SYMBOL(tty_port_free_xmit_buf);
-
-
 static char ptychar[] = "pqrstuvwxyzabcde";
 
 /**
@@ -1592,7 +1187,7 @@
 }
 
 /**
- *	pty_line_name	-	generate name for a tty
+ *	tty_line_name	-	generate name for a tty
  *	@driver: the tty driver in use
  *	@index: the minor number
  *	@p: output buffer of at least 7 bytes
@@ -1608,10 +1203,148 @@
 }
 
 /**
- *	init_dev		-	initialise a tty device
+ *	tty_driver_lookup_tty() - find an existing tty, if any
+ *	@driver: the driver for the tty
+ *	@idx:	 the minor number
+ *
+ *	Return the tty, if found or ERR_PTR() otherwise.
+ *
+ *	Locking: tty_mutex must be held. If tty is found, the mutex must
+ *	be held until the 'fast-open' is also done. Will change once we
+ *	have refcounting in the driver and per driver locking
+ */
+struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
+		struct inode *inode, int idx)
+{
+	struct tty_struct *tty;
+
+	if (driver->ops->lookup)
+		return driver->ops->lookup(driver, inode, idx);
+
+	tty = driver->ttys[idx];
+	return tty;
+}
+
+/**
+ *	tty_init_termios	-  helper for termios setup
+ *	@tty: the tty to set up
+ *
+ *	Initialise the termios structures for this tty. Thus runs under
+ *	the tty_mutex currently so we can be relaxed about ordering.
+ */
+
+int tty_init_termios(struct tty_struct *tty)
+{
+	struct ktermios *tp;
+	int idx = tty->index;
+
+	tp = tty->driver->termios[idx];
+	if (tp == NULL) {
+		tp = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL);
+		if (tp == NULL)
+			return -ENOMEM;
+		memcpy(tp, &tty->driver->init_termios,
+						sizeof(struct ktermios));
+		tty->driver->termios[idx] = tp;
+	}
+	tty->termios = tp;
+	tty->termios_locked = tp + 1;
+
+	/* Compatibility until drivers always set this */
+	tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
+	tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios);
+	return 0;
+}
+
+/**
+ *	tty_driver_install_tty() - install a tty entry in the driver
+ *	@driver: the driver for the tty
+ *	@tty: the tty
+ *
+ *	Install a tty object into the driver tables. The tty->index field
+ *	will be set by the time this is called. This method is responsible
+ *	for ensuring any need additional structures are allocated and
+ *	configured.
+ *
+ *	Locking: tty_mutex for now
+ */
+static int tty_driver_install_tty(struct tty_driver *driver,
+						struct tty_struct *tty)
+{
+	int idx = tty->index;
+
+	if (driver->ops->install)
+		return driver->ops->install(driver, tty);
+
+	if (tty_init_termios(tty) == 0) {
+		tty_driver_kref_get(driver);
+		tty->count++;
+		driver->ttys[idx] = tty;
+		return 0;
+	}
+	return -ENOMEM;
+}
+
+/**
+ *	tty_driver_remove_tty() - remove a tty from the driver tables
+ *	@driver: the driver for the tty
+ *	@idx:	 the minor number
+ *
+ *	Remvoe a tty object from the driver tables. The tty->index field
+ *	will be set by the time this is called.
+ *
+ *	Locking: tty_mutex for now
+ */
+static void tty_driver_remove_tty(struct tty_driver *driver,
+						struct tty_struct *tty)
+{
+	if (driver->ops->remove)
+		driver->ops->remove(driver, tty);
+	else
+		driver->ttys[tty->index] = NULL;
+}
+
+/*
+ * 	tty_reopen()	- fast re-open of an open tty
+ * 	@tty	- the tty to open
+ *
+ *	Return 0 on success, -errno on error.
+ *
+ *	Locking: tty_mutex must be held from the time the tty was found
+ *		 till this open completes.
+ */
+static int tty_reopen(struct tty_struct *tty)
+{
+	struct tty_driver *driver = tty->driver;
+
+	if (test_bit(TTY_CLOSING, &tty->flags))
+		return -EIO;
+
+	if (driver->type == TTY_DRIVER_TYPE_PTY &&
+	    driver->subtype == PTY_TYPE_MASTER) {
+		/*
+		 * special case for PTY masters: only one open permitted,
+		 * and the slave side open count is incremented as well.
+		 */
+		if (tty->count)
+			return -EIO;
+
+		tty->link->count++;
+	}
+	tty->count++;
+	tty->driver = driver; /* N.B. why do this every time?? */
+
+	WARN_ON(!test_bit(TTY_LDISC, &tty->flags));
+
+	return 0;
+}
+
+/**
+ *	tty_init_dev		-	initialise a tty device
  *	@driver: tty driver we are opening a device on
  *	@idx: device index
- *	@tty: returned tty structure
+ *	@ret_tty: returned tty structure
+ *	@first_ok: ok to open a new device (used by ptmx)
  *
  *	Prepare a tty device. This may not be a "new" clean device but
  *	could also be an active device. The pty drivers require special
@@ -1631,37 +1364,16 @@
  * relaxed for the (most common) case of reopening a tty.
  */
 
-static int init_dev(struct tty_driver *driver, int idx,
-	struct tty_struct **ret_tty)
+struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
+								int first_ok)
 {
-	struct tty_struct *tty, *o_tty;
-	struct ktermios *tp, **tp_loc, *o_tp, **o_tp_loc;
-	struct ktermios *ltp, **ltp_loc, *o_ltp, **o_ltp_loc;
-	int retval = 0;
+	struct tty_struct *tty;
+	int retval;
 
-	/* check whether we're reopening an existing tty */
-	if (driver->flags & TTY_DRIVER_DEVPTS_MEM) {
-		tty = devpts_get_tty(idx);
-		/*
-		 * If we don't have a tty here on a slave open, it's because
-		 * the master already started the close process and there's
-		 * no relation between devpts file and tty anymore.
-		 */
-		if (!tty && driver->subtype == PTY_TYPE_SLAVE) {
-			retval = -EIO;
-			goto end_init;
-		}
-		/*
-		 * It's safe from now on because init_dev() is called with
-		 * tty_mutex held and release_dev() won't change tty->count
-		 * or tty->flags without having to grab tty_mutex
-		 */
-		if (tty && driver->subtype == PTY_TYPE_MASTER)
-			tty = tty->link;
-	} else {
-		tty = driver->ttys[idx];
-	}
-	if (tty) goto fast_track;
+	/* Check if pty master is being opened multiple times */
+	if (driver->subtype == PTY_TYPE_MASTER &&
+		(driver->flags & TTY_DRIVER_DEVPTS_MEM) && !first_ok)
+		return ERR_PTR(-EIO);
 
 	/*
 	 * First time open is complex, especially for PTY devices.
@@ -1671,189 +1383,69 @@
 	 * and locked termios may be retained.)
 	 */
 
-	if (!try_module_get(driver->owner)) {
-		retval = -ENODEV;
-		goto end_init;
-	}
-
-	o_tty = NULL;
-	tp = o_tp = NULL;
-	ltp = o_ltp = NULL;
+	if (!try_module_get(driver->owner))
+		return ERR_PTR(-ENODEV);
 
 	tty = alloc_tty_struct();
 	if (!tty)
 		goto fail_no_mem;
-	initialize_tty_struct(tty);
-	tty->driver = driver;
-	tty->ops = driver->ops;
-	tty->index = idx;
-	tty_line_name(driver, idx, tty->name);
+	initialize_tty_struct(tty, driver, idx);
 
-	if (driver->flags & TTY_DRIVER_DEVPTS_MEM) {
-		tp_loc = &tty->termios;
-		ltp_loc = &tty->termios_locked;
-	} else {
-		tp_loc = &driver->termios[idx];
-		ltp_loc = &driver->termios_locked[idx];
+	retval = tty_driver_install_tty(driver, tty);
+	if (retval < 0) {
+		free_tty_struct(tty);
+		module_put(driver->owner);
+		return ERR_PTR(retval);
 	}
 
-	if (!*tp_loc) {
-		tp = kmalloc(sizeof(struct ktermios), GFP_KERNEL);
-		if (!tp)
-			goto free_mem_out;
-		*tp = driver->init_termios;
-	}
-
-	if (!*ltp_loc) {
-		ltp = kzalloc(sizeof(struct ktermios), GFP_KERNEL);
-		if (!ltp)
-			goto free_mem_out;
-	}
-
-	if (driver->type == TTY_DRIVER_TYPE_PTY) {
-		o_tty = alloc_tty_struct();
-		if (!o_tty)
-			goto free_mem_out;
-		initialize_tty_struct(o_tty);
-		o_tty->driver = driver->other;
-		o_tty->ops = driver->ops;
-		o_tty->index = idx;
-		tty_line_name(driver->other, idx, o_tty->name);
-
-		if (driver->flags & TTY_DRIVER_DEVPTS_MEM) {
-			o_tp_loc = &o_tty->termios;
-			o_ltp_loc = &o_tty->termios_locked;
-		} else {
-			o_tp_loc = &driver->other->termios[idx];
-			o_ltp_loc = &driver->other->termios_locked[idx];
-		}
-
-		if (!*o_tp_loc) {
-			o_tp = kmalloc(sizeof(struct ktermios), GFP_KERNEL);
-			if (!o_tp)
-				goto free_mem_out;
-			*o_tp = driver->other->init_termios;
-		}
-
-		if (!*o_ltp_loc) {
-			o_ltp = kzalloc(sizeof(struct ktermios), GFP_KERNEL);
-			if (!o_ltp)
-				goto free_mem_out;
-		}
-
-		/*
-		 * Everything allocated ... set up the o_tty structure.
-		 */
-		if (!(driver->other->flags & TTY_DRIVER_DEVPTS_MEM))
-			driver->other->ttys[idx] = o_tty;
-		if (!*o_tp_loc)
-			*o_tp_loc = o_tp;
-		if (!*o_ltp_loc)
-			*o_ltp_loc = o_ltp;
-		o_tty->termios = *o_tp_loc;
-		o_tty->termios_locked = *o_ltp_loc;
-		driver->other->refcount++;
-		if (driver->subtype == PTY_TYPE_MASTER)
-			o_tty->count++;
-
-		/* Establish the links in both directions */
-		tty->link   = o_tty;
-		o_tty->link = tty;
-	}
-
-	/*
-	 * All structures have been allocated, so now we install them.
-	 * Failures after this point use release_tty to clean up, so
-	 * there's no need to null out the local pointers.
-	 */
-	if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM))
-		driver->ttys[idx] = tty;
-
-	if (!*tp_loc)
-		*tp_loc = tp;
-	if (!*ltp_loc)
-		*ltp_loc = ltp;
-	tty->termios = *tp_loc;
-	tty->termios_locked = *ltp_loc;
-	/* Compatibility until drivers always set this */
-	tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
-	tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios);
-	driver->refcount++;
-	tty->count++;
-
 	/*
 	 * Structures all installed ... call the ldisc open routines.
 	 * If we fail here just call release_tty to clean up.  No need
 	 * to decrement the use counts, as release_tty doesn't care.
 	 */
 
-	retval = tty_ldisc_setup(tty, o_tty);
-
+	retval = tty_ldisc_setup(tty, tty->link);
 	if (retval)
 		goto release_mem_out;
-	 goto success;
-
-	/*
-	 * This fast open can be used if the tty is already open.
-	 * No memory is allocated, and the only failures are from
-	 * attempting to open a closing tty or attempting multiple
-	 * opens on a pty master.
-	 */
-fast_track:
-	if (test_bit(TTY_CLOSING, &tty->flags)) {
-		retval = -EIO;
-		goto end_init;
-	}
-	if (driver->type == TTY_DRIVER_TYPE_PTY &&
-	    driver->subtype == PTY_TYPE_MASTER) {
-		/*
-		 * special case for PTY masters: only one open permitted,
-		 * and the slave side open count is incremented as well.
-		 */
-		if (tty->count) {
-			retval = -EIO;
-			goto end_init;
-		}
-		tty->link->count++;
-	}
-	tty->count++;
-	tty->driver = driver; /* N.B. why do this every time?? */
-
-	/* FIXME */
-	if (!test_bit(TTY_LDISC, &tty->flags))
-		printk(KERN_ERR "init_dev but no ldisc\n");
-success:
-	*ret_tty = tty;
-
-	/* All paths come through here to release the mutex */
-end_init:
-	return retval;
-
-	/* Release locally allocated memory ... nothing placed in slots */
-free_mem_out:
-	kfree(o_tp);
-	if (o_tty)
-		free_tty_struct(o_tty);
-	kfree(ltp);
-	kfree(tp);
-	free_tty_struct(tty);
+	return tty;
 
 fail_no_mem:
 	module_put(driver->owner);
-	retval = -ENOMEM;
-	goto end_init;
+	return ERR_PTR(-ENOMEM);
 
 	/* call the tty release_tty routine to clean out this slot */
 release_mem_out:
 	if (printk_ratelimit())
-		printk(KERN_INFO "init_dev: ldisc open failed, "
+		printk(KERN_INFO "tty_init_dev: ldisc open failed, "
 				 "clearing slot %d\n", idx);
 	release_tty(tty, idx);
-	goto end_init;
+	return ERR_PTR(retval);
 }
 
+void tty_free_termios(struct tty_struct *tty)
+{
+	struct ktermios *tp;
+	int idx = tty->index;
+	/* Kill this flag and push into drivers for locking etc */
+	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) {
+		/* FIXME: Locking on ->termios array */
+		tp = tty->termios;
+		tty->driver->termios[idx] = NULL;
+		kfree(tp);
+	}
+}
+EXPORT_SYMBOL(tty_free_termios);
+
+void tty_shutdown(struct tty_struct *tty)
+{
+	tty_driver_remove_tty(tty->driver, tty);
+	tty_free_termios(tty);
+}
+EXPORT_SYMBOL(tty_shutdown);
+
 /**
  *	release_one_tty		-	release tty structure memory
+ *	@kref: kref of tty we are obliterating
  *
  *	Releases memory associated with a tty structure, and clears out the
  *	driver table slots. This function is called when a device is no longer
@@ -1863,31 +1455,19 @@
  *		tty_mutex - sometimes only
  *		takes the file list lock internally when working on the list
  *	of ttys that the driver keeps.
- *		FIXME: should we require tty_mutex is held here ??
  */
-static void release_one_tty(struct tty_struct *tty, int idx)
+static void release_one_tty(struct kref *kref)
 {
-	int devpts = tty->driver->flags & TTY_DRIVER_DEVPTS_MEM;
-	struct ktermios *tp;
+	struct tty_struct *tty = container_of(kref, struct tty_struct, kref);
+	struct tty_driver *driver = tty->driver;
 
-	if (!devpts)
-		tty->driver->ttys[idx] = NULL;
-
-	if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) {
-		tp = tty->termios;
-		if (!devpts)
-			tty->driver->termios[idx] = NULL;
-		kfree(tp);
-
-		tp = tty->termios_locked;
-		if (!devpts)
-			tty->driver->termios_locked[idx] = NULL;
-		kfree(tp);
-	}
-
-
+	if (tty->ops->shutdown)
+		tty->ops->shutdown(tty);
+	else
+		tty_shutdown(tty);
 	tty->magic = 0;
-	tty->driver->refcount--;
+	tty_driver_kref_put(driver);
+	module_put(driver->owner);
 
 	file_list_lock();
 	list_del_init(&tty->tty_files);
@@ -1897,6 +1477,21 @@
 }
 
 /**
+ *	tty_kref_put		-	release a tty kref
+ *	@tty: tty device
+ *
+ *	Release a reference to a tty device and if need be let the kref
+ *	layer destruct the object for us
+ */
+
+void tty_kref_put(struct tty_struct *tty)
+{
+	if (tty)
+		kref_put(&tty->kref, release_one_tty);
+}
+EXPORT_SYMBOL(tty_kref_put);
+
+/**
  *	release_tty		-	release tty structure memory
  *
  *	Release both @tty and a possible linked partner (think pty pair),
@@ -1907,15 +1502,16 @@
  *		takes the file list lock internally when working on the list
  *	of ttys that the driver keeps.
  *		FIXME: should we require tty_mutex is held here ??
+ *
  */
 static void release_tty(struct tty_struct *tty, int idx)
 {
-	struct tty_driver *driver = tty->driver;
+	/* This should always be true but check for the moment */
+	WARN_ON(tty->index != idx);
 
 	if (tty->link)
-		release_one_tty(tty->link, idx);
-	release_one_tty(tty, idx);
-	module_put(driver->owner);
+		tty_kref_put(tty->link);
+	tty_kref_put(tty);
 }
 
 /*
@@ -1926,20 +1522,21 @@
  * WSH 09/09/97: rewritten to avoid some nasty race conditions that could
  * lead to double frees or releasing memory still in use.
  */
-static void release_dev(struct file *filp)
+void tty_release_dev(struct file *filp)
 {
 	struct tty_struct *tty, *o_tty;
 	int	pty_master, tty_closing, o_tty_closing, do_sleep;
 	int	devpts;
 	int	idx;
 	char	buf[64];
+	struct 	inode *inode;
 
+	inode = filp->f_path.dentry->d_inode;
 	tty = (struct tty_struct *)filp->private_data;
-	if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode,
-							"release_dev"))
+	if (tty_paranoia_check(tty, inode, "tty_release_dev"))
 		return;
 
-	check_tty_count(tty, "release_dev");
+	check_tty_count(tty, "tty_release_dev");
 
 	tty_fasync(-1, filp, 0);
 
@@ -1951,33 +1548,27 @@
 
 #ifdef TTY_PARANOIA_CHECK
 	if (idx < 0 || idx >= tty->driver->num) {
-		printk(KERN_DEBUG "release_dev: bad idx when trying to "
+		printk(KERN_DEBUG "tty_release_dev: bad idx when trying to "
 				  "free (%s)\n", tty->name);
 		return;
 	}
-	if (!(tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)) {
+	if (!devpts) {
 		if (tty != tty->driver->ttys[idx]) {
-			printk(KERN_DEBUG "release_dev: driver.table[%d] not tty "
+			printk(KERN_DEBUG "tty_release_dev: driver.table[%d] not tty "
 			       "for (%s)\n", idx, tty->name);
 			return;
 		}
 		if (tty->termios != tty->driver->termios[idx]) {
-			printk(KERN_DEBUG "release_dev: driver.termios[%d] not termios "
+			printk(KERN_DEBUG "tty_release_dev: driver.termios[%d] not termios "
 			       "for (%s)\n",
 			       idx, tty->name);
 			return;
 		}
-		if (tty->termios_locked != tty->driver->termios_locked[idx]) {
-			printk(KERN_DEBUG "release_dev: driver.termios_locked[%d] not "
-			       "termios_locked for (%s)\n",
-			       idx, tty->name);
-			return;
-		}
 	}
 #endif
 
 #ifdef TTY_DEBUG_HANGUP
-	printk(KERN_DEBUG "release_dev of %s (tty count=%d)...",
+	printk(KERN_DEBUG "tty_release_dev of %s (tty count=%d)...",
 	       tty_name(tty, buf), tty->count);
 #endif
 
@@ -1985,26 +1576,19 @@
 	if (tty->driver->other &&
 	     !(tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)) {
 		if (o_tty != tty->driver->other->ttys[idx]) {
-			printk(KERN_DEBUG "release_dev: other->table[%d] "
+			printk(KERN_DEBUG "tty_release_dev: other->table[%d] "
 					  "not o_tty for (%s)\n",
 			       idx, tty->name);
 			return;
 		}
 		if (o_tty->termios != tty->driver->other->termios[idx]) {
-			printk(KERN_DEBUG "release_dev: other->termios[%d] "
+			printk(KERN_DEBUG "tty_release_dev: other->termios[%d] "
 					  "not o_termios for (%s)\n",
 			       idx, tty->name);
 			return;
 		}
-		if (o_tty->termios_locked !=
-		      tty->driver->other->termios_locked[idx]) {
-			printk(KERN_DEBUG "release_dev: other->termios_locked["
-					  "%d] not o_termios_locked for (%s)\n",
-			       idx, tty->name);
-			return;
-		}
 		if (o_tty->link != tty) {
-			printk(KERN_DEBUG "release_dev: bad pty pointers\n");
+			printk(KERN_DEBUG "tty_release_dev: bad pty pointers\n");
 			return;
 		}
 	}
@@ -2062,7 +1646,7 @@
 		if (!do_sleep)
 			break;
 
-		printk(KERN_WARNING "release_dev: %s: read/write wait queue "
+		printk(KERN_WARNING "tty_release_dev: %s: read/write wait queue "
 				    "active!\n", tty_name(tty, buf));
 		mutex_unlock(&tty_mutex);
 		schedule();
@@ -2075,14 +1659,14 @@
 	 */
 	if (pty_master) {
 		if (--o_tty->count < 0) {
-			printk(KERN_WARNING "release_dev: bad pty slave count "
+			printk(KERN_WARNING "tty_release_dev: bad pty slave count "
 					    "(%d) for %s\n",
 			       o_tty->count, tty_name(o_tty, buf));
 			o_tty->count = 0;
 		}
 	}
 	if (--tty->count < 0) {
-		printk(KERN_WARNING "release_dev: bad tty->count (%d) for %s\n",
+		printk(KERN_WARNING "tty_release_dev: bad tty->count (%d) for %s\n",
 		       tty->count, tty_name(tty, buf));
 		tty->count = 0;
 	}
@@ -2145,11 +1729,11 @@
 
 	/* Make this pty number available for reallocation */
 	if (devpts)
-		devpts_kill_index(idx);
+		devpts_kill_index(inode, idx);
 }
 
 /**
- *	tty_open		-	open a tty device
+ *	__tty_open		-	open a tty device
  *	@inode: inode of device file
  *	@filp: file pointer to tty
  *
@@ -2164,14 +1748,14 @@
  *	The termios state of a pty is reset on first open so that
  *	settings don't persist across reuse.
  *
- *	Locking: tty_mutex protects tty, get_tty_driver and init_dev work.
+ *	Locking: tty_mutex protects tty, get_tty_driver and tty_init_dev work.
  *		 tty->count should protect the rest.
  *		 ->siglock protects ->signal/->sighand
  */
 
 static int __tty_open(struct inode *inode, struct file *filp)
 {
-	struct tty_struct *tty;
+	struct tty_struct *tty = NULL;
 	int noctty, retval;
 	struct tty_driver *driver;
 	int index;
@@ -2193,23 +1777,25 @@
 			mutex_unlock(&tty_mutex);
 			return -ENXIO;
 		}
-		driver = tty->driver;
+		driver = tty_driver_kref_get(tty->driver);
 		index = tty->index;
 		filp->f_flags |= O_NONBLOCK; /* Don't let /dev/tty block */
 		/* noctty = 1; */
+		/* FIXME: Should we take a driver reference ? */
+		tty_kref_put(tty);
 		goto got_driver;
 	}
 #ifdef CONFIG_VT
 	if (device == MKDEV(TTY_MAJOR, 0)) {
 		extern struct tty_driver *console_driver;
-		driver = console_driver;
+		driver = tty_driver_kref_get(console_driver);
 		index = fg_console;
 		noctty = 1;
 		goto got_driver;
 	}
 #endif
 	if (device == MKDEV(TTYAUX_MAJOR, 1)) {
-		driver = console_device(&index);
+		driver = tty_driver_kref_get(console_device(&index));
 		if (driver) {
 			/* Don't let /dev/console block */
 			filp->f_flags |= O_NONBLOCK;
@@ -2226,10 +1812,25 @@
 		return -ENODEV;
 	}
 got_driver:
-	retval = init_dev(driver, index, &tty);
+	if (!tty) {
+		/* check whether we're reopening an existing tty */
+		tty = tty_driver_lookup_tty(driver, inode, index);
+
+		if (IS_ERR(tty))
+			return PTR_ERR(tty);
+	}
+
+	if (tty) {
+		retval = tty_reopen(tty);
+		if (retval)
+			tty = ERR_PTR(retval);
+	} else
+		tty = tty_init_dev(driver, index, 0);
+
 	mutex_unlock(&tty_mutex);
-	if (retval)
-		return retval;
+	tty_driver_kref_put(driver);
+	if (IS_ERR(tty))
+		return PTR_ERR(tty);
 
 	filp->private_data = tty;
 	file_move(filp, &tty->tty_files);
@@ -2257,7 +1858,7 @@
 		printk(KERN_DEBUG "error %d in opening %s...", retval,
 		       tty->name);
 #endif
-		release_dev(filp);
+		tty_release_dev(filp);
 		if (retval != -ERESTARTSYS)
 			return retval;
 		if (signal_pending(current))
@@ -2296,69 +1897,6 @@
 
 
 
-#ifdef CONFIG_UNIX98_PTYS
-/**
- *	ptmx_open		-	open a unix 98 pty master
- *	@inode: inode of device file
- *	@filp: file pointer to tty
- *
- *	Allocate a unix98 pty master device from the ptmx driver.
- *
- *	Locking: tty_mutex protects theinit_dev work. tty->count should
- * 		protect the rest.
- *		allocated_ptys_lock handles the list of free pty numbers
- */
-
-static int __ptmx_open(struct inode *inode, struct file *filp)
-{
-	struct tty_struct *tty;
-	int retval;
-	int index;
-
-	nonseekable_open(inode, filp);
-
-	/* find a device that is not in use. */
-	index = devpts_new_index();
-	if (index < 0)
-		return index;
-
-	mutex_lock(&tty_mutex);
-	retval = init_dev(ptm_driver, index, &tty);
-	mutex_unlock(&tty_mutex);
-
-	if (retval)
-		goto out;
-
-	set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
-	filp->private_data = tty;
-	file_move(filp, &tty->tty_files);
-
-	retval = devpts_pty_new(tty->link);
-	if (retval)
-		goto out1;
-
-	check_tty_count(tty, "ptmx_open");
-	retval = ptm_driver->ops->open(tty, filp);
-	if (!retval)
-		return 0;
-out1:
-	release_dev(filp);
-	return retval;
-out:
-	devpts_kill_index(index);
-	return retval;
-}
-
-static int ptmx_open(struct inode *inode, struct file *filp)
-{
-	int ret;
-
-	lock_kernel();
-	ret = __ptmx_open(inode, filp);
-	unlock_kernel();
-	return ret;
-}
-#endif
 
 /**
  *	tty_release		-	vfs callback for close
@@ -2369,13 +1907,13 @@
  *	this tty. There may however be several such references.
  *
  *	Locking:
- *		Takes bkl. See release_dev
+ *		Takes bkl. See tty_release_dev
  */
 
 static int tty_release(struct inode *inode, struct file *filp)
 {
 	lock_kernel();
-	release_dev(filp);
+	tty_release_dev(filp);
 	unlock_kernel();
 	return 0;
 }
@@ -2524,7 +2062,7 @@
 
 	/* For a PTY we need to lock the tty side */
 	mutex_lock(&real_tty->termios_mutex);
-	if (!memcmp(ws, &tty->winsize, sizeof(*ws)))
+	if (!memcmp(ws, &real_tty->winsize, sizeof(*ws)))
 		goto done;
 	/* Get the PID values and reference them so we can
 	   avoid holding the tty ctrl lock while sending signals */
@@ -2996,7 +2534,7 @@
 	case TIOCSTI:
 		return tiocsti(tty, p);
 	case TIOCGWINSZ:
-		return tiocgwinsz(tty, p);
+		return tiocgwinsz(real_tty, p);
 	case TIOCSWINSZ:
 		return tiocswinsz(tty, real_tty, p);
 	case TIOCCONS:
@@ -3026,10 +2564,6 @@
 		return put_user(tty->ldisc.ops->num, (int __user *)p);
 	case TIOCSETD:
 		return tiocsetd(tty, p);
-#ifdef CONFIG_VT
-	case TIOCLINUX:
-		return tioclinux(tty, arg);
-#endif
 	/*
 	 * Break handling
 	 */
@@ -3220,113 +2754,6 @@
 EXPORT_SYMBOL(do_SAK);
 
 /**
- *	flush_to_ldisc
- *	@work: tty structure passed from work queue.
- *
- *	This routine is called out of the software interrupt to flush data
- *	from the buffer chain to the line discipline.
- *
- *	Locking: holds tty->buf.lock to guard buffer list. Drops the lock
- *	while invoking the line discipline receive_buf method. The
- *	receive_buf method is single threaded for each tty instance.
- */
-
-static void flush_to_ldisc(struct work_struct *work)
-{
-	struct tty_struct *tty =
-		container_of(work, struct tty_struct, buf.work.work);
-	unsigned long 	flags;
-	struct tty_ldisc *disc;
-	struct tty_buffer *tbuf, *head;
-	char *char_buf;
-	unsigned char *flag_buf;
-
-	disc = tty_ldisc_ref(tty);
-	if (disc == NULL)	/*  !TTY_LDISC */
-		return;
-
-	spin_lock_irqsave(&tty->buf.lock, flags);
-	/* So we know a flush is running */
-	set_bit(TTY_FLUSHING, &tty->flags);
-	head = tty->buf.head;
-	if (head != NULL) {
-		tty->buf.head = NULL;
-		for (;;) {
-			int count = head->commit - head->read;
-			if (!count) {
-				if (head->next == NULL)
-					break;
-				tbuf = head;
-				head = head->next;
-				tty_buffer_free(tty, tbuf);
-				continue;
-			}
-			/* Ldisc or user is trying to flush the buffers
-			   we are feeding to the ldisc, stop feeding the
-			   line discipline as we want to empty the queue */
-			if (test_bit(TTY_FLUSHPENDING, &tty->flags))
-				break;
-			if (!tty->receive_room) {
-				schedule_delayed_work(&tty->buf.work, 1);
-				break;
-			}
-			if (count > tty->receive_room)
-				count = tty->receive_room;
-			char_buf = head->char_buf_ptr + head->read;
-			flag_buf = head->flag_buf_ptr + head->read;
-			head->read += count;
-			spin_unlock_irqrestore(&tty->buf.lock, flags);
-			disc->ops->receive_buf(tty, char_buf,
-							flag_buf, count);
-			spin_lock_irqsave(&tty->buf.lock, flags);
-		}
-		/* Restore the queue head */
-		tty->buf.head = head;
-	}
-	/* We may have a deferred request to flush the input buffer,
-	   if so pull the chain under the lock and empty the queue */
-	if (test_bit(TTY_FLUSHPENDING, &tty->flags)) {
-		__tty_buffer_flush(tty);
-		clear_bit(TTY_FLUSHPENDING, &tty->flags);
-		wake_up(&tty->read_wait);
-	}
-	clear_bit(TTY_FLUSHING, &tty->flags);
-	spin_unlock_irqrestore(&tty->buf.lock, flags);
-
-	tty_ldisc_deref(disc);
-}
-
-/**
- *	tty_flip_buffer_push	-	terminal
- *	@tty: tty to push
- *
- *	Queue a push of the terminal flip buffers to the line discipline. This
- *	function must not be called from IRQ context if tty->low_latency is set.
- *
- *	In the event of the queue being busy for flipping the work will be
- *	held off and retried later.
- *
- *	Locking: tty buffer lock. Driver locks in low latency mode.
- */
-
-void tty_flip_buffer_push(struct tty_struct *tty)
-{
-	unsigned long flags;
-	spin_lock_irqsave(&tty->buf.lock, flags);
-	if (tty->buf.tail != NULL)
-		tty->buf.tail->commit = tty->buf.tail->used;
-	spin_unlock_irqrestore(&tty->buf.lock, flags);
-
-	if (tty->low_latency)
-		flush_to_ldisc(&tty->buf.work.work);
-	else
-		schedule_delayed_work(&tty->buf.work, 1);
-}
-
-EXPORT_SYMBOL(tty_flip_buffer_push);
-
-
-/**
  *	initialize_tty_struct
  *	@tty: tty to initialize
  *
@@ -3336,9 +2763,11 @@
  *	Locking: none - tty in question must not be exposed at this point
  */
 
-static void initialize_tty_struct(struct tty_struct *tty)
+void initialize_tty_struct(struct tty_struct *tty,
+		struct tty_driver *driver, int idx)
 {
 	memset(tty, 0, sizeof(struct tty_struct));
+	kref_init(&tty->kref);
 	tty->magic = TTY_MAGIC;
 	tty_ldisc_init(tty);
 	tty->session = NULL;
@@ -3346,7 +2775,6 @@
 	tty->overrun_time = jiffies;
 	tty->buf.head = tty->buf.tail = NULL;
 	tty_buffer_init(tty);
-	INIT_DELAYED_WORK(&tty->buf.work, flush_to_ldisc);
 	mutex_init(&tty->termios_mutex);
 	init_waitqueue_head(&tty->write_wait);
 	init_waitqueue_head(&tty->read_wait);
@@ -3357,6 +2785,11 @@
 	spin_lock_init(&tty->ctrl_lock);
 	INIT_LIST_HEAD(&tty->tty_files);
 	INIT_WORK(&tty->SAK_work, do_SAK_work);
+
+	tty->driver = driver;
+	tty->ops = driver->ops;
+	tty->index = idx;
+	tty_line_name(driver, idx, tty->name);
 }
 
 /**
@@ -3377,10 +2810,9 @@
 		return tty->ops->put_char(tty, ch);
 	return tty->ops->write(tty, &ch, 1);
 }
-
 EXPORT_SYMBOL_GPL(tty_put_char);
 
-static struct class *tty_class;
+struct class *tty_class;
 
 /**
  *	tty_register_device - register a tty device
@@ -3420,6 +2852,7 @@
 
 	return device_create_drvdata(tty_class, device, dev, NULL, name);
 }
+EXPORT_SYMBOL(tty_register_device);
 
 /**
  * 	tty_unregister_device - unregister a tty device
@@ -3437,8 +2870,6 @@
 	device_destroy(tty_class,
 		MKDEV(driver->major, driver->minor_start) + index);
 }
-
-EXPORT_SYMBOL(tty_register_device);
 EXPORT_SYMBOL(tty_unregister_device);
 
 struct tty_driver *alloc_tty_driver(int lines)
@@ -3447,28 +2878,66 @@
 
 	driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL);
 	if (driver) {
+		kref_init(&driver->kref);
 		driver->magic = TTY_DRIVER_MAGIC;
 		driver->num = lines;
 		/* later we'll move allocation of tables here */
 	}
 	return driver;
 }
+EXPORT_SYMBOL(alloc_tty_driver);
 
-void put_tty_driver(struct tty_driver *driver)
+static void destruct_tty_driver(struct kref *kref)
 {
+	struct tty_driver *driver = container_of(kref, struct tty_driver, kref);
+	int i;
+	struct ktermios *tp;
+	void *p;
+
+	if (driver->flags & TTY_DRIVER_INSTALLED) {
+		/*
+		 * Free the termios and termios_locked structures because
+		 * we don't want to get memory leaks when modular tty
+		 * drivers are removed from the kernel.
+		 */
+		for (i = 0; i < driver->num; i++) {
+			tp = driver->termios[i];
+			if (tp) {
+				driver->termios[i] = NULL;
+				kfree(tp);
+			}
+			if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))
+				tty_unregister_device(driver, i);
+		}
+		p = driver->ttys;
+		proc_tty_unregister_driver(driver);
+		driver->ttys = NULL;
+		driver->termios = NULL;
+		kfree(p);
+		cdev_del(&driver->cdev);
+	}
 	kfree(driver);
 }
 
+void tty_driver_kref_put(struct tty_driver *driver)
+{
+	kref_put(&driver->kref, destruct_tty_driver);
+}
+EXPORT_SYMBOL(tty_driver_kref_put);
+
 void tty_set_operations(struct tty_driver *driver,
 			const struct tty_operations *op)
 {
 	driver->ops = op;
 };
-
-EXPORT_SYMBOL(alloc_tty_driver);
-EXPORT_SYMBOL(put_tty_driver);
 EXPORT_SYMBOL(tty_set_operations);
 
+void put_tty_driver(struct tty_driver *d)
+{
+	tty_driver_kref_put(d);
+}
+EXPORT_SYMBOL(put_tty_driver);
+
 /*
  * Called by a tty driver to register itself.
  */
@@ -3479,11 +2948,8 @@
 	dev_t dev;
 	void **p = NULL;
 
-	if (driver->flags & TTY_DRIVER_INSTALLED)
-		return 0;
-
 	if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM) && driver->num) {
-		p = kzalloc(driver->num * 3 * sizeof(void *), GFP_KERNEL);
+		p = kzalloc(driver->num * 2 * sizeof(void *), GFP_KERNEL);
 		if (!p)
 			return -ENOMEM;
 	}
@@ -3507,12 +2973,9 @@
 	if (p) {
 		driver->ttys = (struct tty_struct **)p;
 		driver->termios = (struct ktermios **)(p + driver->num);
-		driver->termios_locked = (struct ktermios **)
-							(p + driver->num * 2);
 	} else {
 		driver->ttys = NULL;
 		driver->termios = NULL;
-		driver->termios_locked = NULL;
 	}
 
 	cdev_init(&driver->cdev, &tty_fops);
@@ -3521,7 +2984,7 @@
 	if (error) {
 		unregister_chrdev_region(dev, driver->num);
 		driver->ttys = NULL;
-		driver->termios = driver->termios_locked = NULL;
+		driver->termios = NULL;
 		kfree(p);
 		return error;
 	}
@@ -3535,6 +2998,7 @@
 		    tty_register_device(driver, i, NULL);
 	}
 	proc_tty_register_driver(driver);
+	driver->flags |= TTY_DRIVER_INSTALLED;
 	return 0;
 }
 
@@ -3545,46 +3009,19 @@
  */
 int tty_unregister_driver(struct tty_driver *driver)
 {
-	int i;
-	struct ktermios *tp;
-	void *p;
-
+#if 0
+	/* FIXME */
 	if (driver->refcount)
 		return -EBUSY;
-
+#endif
 	unregister_chrdev_region(MKDEV(driver->major, driver->minor_start),
 				driver->num);
 	mutex_lock(&tty_mutex);
 	list_del(&driver->tty_drivers);
 	mutex_unlock(&tty_mutex);
-
-	/*
-	 * Free the termios and termios_locked structures because
-	 * we don't want to get memory leaks when modular tty
-	 * drivers are removed from the kernel.
-	 */
-	for (i = 0; i < driver->num; i++) {
-		tp = driver->termios[i];
-		if (tp) {
-			driver->termios[i] = NULL;
-			kfree(tp);
-		}
-		tp = driver->termios_locked[i];
-		if (tp) {
-			driver->termios_locked[i] = NULL;
-			kfree(tp);
-		}
-		if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))
-			tty_unregister_device(driver, i);
-	}
-	p = driver->ttys;
-	proc_tty_unregister_driver(driver);
-	driver->ttys = NULL;
-	driver->termios = driver->termios_locked = NULL;
-	kfree(p);
-	cdev_del(&driver->cdev);
 	return 0;
 }
+
 EXPORT_SYMBOL(tty_unregister_driver);
 
 dev_t tty_devnum(struct tty_struct *tty)
@@ -3595,9 +3032,12 @@
 
 void proc_clear_tty(struct task_struct *p)
 {
+	struct tty_struct *tty;
 	spin_lock_irq(&p->sighand->siglock);
+	tty = p->signal->tty;
 	p->signal->tty = NULL;
 	spin_unlock_irq(&p->sighand->siglock);
+	tty_kref_put(tty);
 }
 
 /* Called under the sighand lock */
@@ -3613,9 +3053,13 @@
 		tty->pgrp = get_pid(task_pgrp(tsk));
 		spin_unlock_irqrestore(&tty->ctrl_lock, flags);
 		tty->session = get_pid(task_session(tsk));
+		if (tsk->signal->tty) {
+			printk(KERN_DEBUG "tty not NULL!!\n");
+			tty_kref_put(tsk->signal->tty);
+		}
 	}
 	put_pid(tsk->signal->tty_old_pgrp);
-	tsk->signal->tty = tty;
+	tsk->signal->tty = tty_kref_get(tty);
 	tsk->signal->tty_old_pgrp = NULL;
 }
 
@@ -3629,18 +3073,20 @@
 struct tty_struct *get_current_tty(void)
 {
 	struct tty_struct *tty;
-	WARN_ON_ONCE(!mutex_is_locked(&tty_mutex));
-	tty = current->signal->tty;
-	/*
-	 * session->tty can be changed/cleared from under us, make sure we
-	 * issue the load. The obtained pointer, when not NULL, is valid as
-	 * long as we hold tty_mutex.
-	 */
-	barrier();
+	unsigned long flags;
+
+	spin_lock_irqsave(&current->sighand->siglock, flags);
+	tty = tty_kref_get(current->signal->tty);
+	spin_unlock_irqrestore(&current->sighand->siglock, flags);
 	return tty;
 }
 EXPORT_SYMBOL_GPL(get_current_tty);
 
+void tty_default_fops(struct file_operations *fops)
+{
+	*fops = tty_fops;
+}
+
 /*
  * Initialize the console device. This is called *early*, so
  * we can't necessarily depend on lots of kernel help here.
@@ -3678,12 +3124,6 @@
 /* 3/2004 jmc: why do these devices exist? */
 
 static struct cdev tty_cdev, console_cdev;
-#ifdef CONFIG_UNIX98_PTYS
-static struct cdev ptmx_cdev;
-#endif
-#ifdef CONFIG_VT
-static struct cdev vc0_cdev;
-#endif
 
 /*
  * Ok, now we can initialize the rest of the tty devices and can count
@@ -3695,32 +3135,18 @@
 	if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
 		panic("Couldn't register /dev/tty driver\n");
-	device_create_drvdata(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL,
+	device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL,
 			      "tty");
 
 	cdev_init(&console_cdev, &console_fops);
 	if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
 		panic("Couldn't register /dev/console driver\n");
-	device_create_drvdata(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL,
+	device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL,
 			      "console");
 
-#ifdef CONFIG_UNIX98_PTYS
-	cdev_init(&ptmx_cdev, &ptmx_fops);
-	if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
-	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
-		panic("Couldn't register /dev/ptmx driver\n");
-	device_create_drvdata(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
-#endif
-
 #ifdef CONFIG_VT
-	cdev_init(&vc0_cdev, &console_fops);
-	if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
-	    register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
-		panic("Couldn't register /dev/tty0 driver\n");
-	device_create_drvdata(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
-
-	vty_init();
+	vty_init(&console_fops);
 #endif
 	return 0;
 }
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c
index bf34e45..a408c8e 100644
--- a/drivers/char/tty_ioctl.c
+++ b/drivers/char/tty_ioctl.c
@@ -40,6 +40,15 @@
 #define TERMIOS_OLD	8
 
 
+/**
+ *	tty_chars_in_buffer	-	characters pending
+ *	@tty: terminal
+ *
+ *	Return the number of bytes of data in the device private
+ *	output queue. If no private method is supplied there is assumed
+ *	to be no queue on the device.
+ */
+
 int tty_chars_in_buffer(struct tty_struct *tty)
 {
 	if (tty->ops->chars_in_buffer)
@@ -47,26 +56,49 @@
 	else
 		return 0;
 }
-
 EXPORT_SYMBOL(tty_chars_in_buffer);
 
+/**
+ *	tty_write_room		-	write queue space
+ *	@tty: terminal
+ *
+ *	Return the number of bytes that can be queued to this device
+ *	at the present time. The result should be treated as a guarantee
+ *	and the driver cannot offer a value it later shrinks by more than
+ *	the number of bytes written. If no method is provided 2K is always
+ *	returned and data may be lost as there will be no flow control.
+ */
+ 
 int tty_write_room(struct tty_struct *tty)
 {
 	if (tty->ops->write_room)
 		return tty->ops->write_room(tty);
 	return 2048;
 }
-
 EXPORT_SYMBOL(tty_write_room);
 
+/**
+ *	tty_driver_flush_buffer	-	discard internal buffer
+ *	@tty: terminal
+ *
+ *	Discard the internal output buffer for this device. If no method
+ *	is provided then either the buffer cannot be hardware flushed or
+ *	there is no buffer driver side.
+ */
 void tty_driver_flush_buffer(struct tty_struct *tty)
 {
 	if (tty->ops->flush_buffer)
 		tty->ops->flush_buffer(tty);
 }
-
 EXPORT_SYMBOL(tty_driver_flush_buffer);
 
+/**
+ *	tty_throttle		-	flow control
+ *	@tty: terminal
+ *
+ *	Indicate that a tty should stop transmitting data down the stack.
+ */
+
 void tty_throttle(struct tty_struct *tty)
 {
 	/* check TTY_THROTTLED first so it indicates our state */
@@ -76,6 +108,13 @@
 }
 EXPORT_SYMBOL(tty_throttle);
 
+/**
+ *	tty_unthrottle		-	flow control
+ *	@tty: terminal
+ *
+ *	Indicate that a tty may continue transmitting data down the stack.
+ */
+
 void tty_unthrottle(struct tty_struct *tty)
 {
 	if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
@@ -112,6 +151,11 @@
 }
 EXPORT_SYMBOL(tty_wait_until_sent);
 
+
+/*
+ *		Termios Helper Methods
+ */
+
 static void unset_locked_termios(struct ktermios *termios,
 				 struct ktermios *old,
 				 struct ktermios *locked)
@@ -346,6 +390,16 @@
 }
 EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate);
 
+/**
+ *	tty_encode_baud_rate		-	set baud rate of the tty
+ *	@ibaud: input baud rate
+ *	@obad: output baud rate
+ *
+ *	Update the current termios data for the tty with the new speed
+ *	settings. The caller must hold the termios_mutex for the tty in
+ *	question.
+ */
+
 void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud)
 {
 	tty_termios_encode_baud_rate(tty->termios, ibaud, obaud);
@@ -430,12 +484,11 @@
  *	is a bit of layering violation here with n_tty in terms of the
  *	internal knowledge of this function.
  *
- *	Locking: termios_sem
+ *	Locking: termios_mutex
  */
 
 static void change_termios(struct tty_struct *tty, struct ktermios *new_termios)
 {
-	int canon_change;
 	struct ktermios old_termios;
 	struct tty_ldisc *ld;
 	unsigned long flags;
@@ -451,18 +504,6 @@
 	old_termios = *tty->termios;
 	*tty->termios = *new_termios;
 	unset_locked_termios(tty->termios, &old_termios, tty->termios_locked);
-	canon_change = (old_termios.c_lflag ^ tty->termios->c_lflag) & ICANON;
-	if (canon_change) {
-		memset(&tty->read_flags, 0, sizeof tty->read_flags);
-		tty->canon_head = tty->read_tail;
-		tty->canon_data = 0;
-		tty->erasing = 0;
-	}
-
-	/* This bit should be in the ldisc code */
-	if (canon_change && !L_ICANON(tty) && tty->read_cnt)
-		/* Get characters left over from canonical mode. */
-		wake_up_interruptible(&tty->read_wait);
 
 	/* See if packet mode change of state. */
 	if (tty->link && tty->link->packet) {
@@ -508,7 +549,7 @@
  *	functions before using change_termios to do the actual changes.
  *
  *	Locking:
- *		Called functions take ldisc and termios_sem locks
+ *		Called functions take ldisc and termios_mutex locks
  */
 
 static int set_termios(struct tty_struct *tty, void __user *arg, int opt)
@@ -579,25 +620,51 @@
 	return 0;
 }
 
-static unsigned long inq_canon(struct tty_struct *tty)
-{
-	int nr, head, tail;
 
-	if (!tty->canon_data || !tty->read_buf)
-		return 0;
-	head = tty->canon_head;
-	tail = tty->read_tail;
-	nr = (head - tail) & (N_TTY_BUF_SIZE-1);
-	/* Skip EOF-chars.. */
-	while (head != tail) {
-		if (test_bit(tail, tty->read_flags) &&
-		    tty->read_buf[tail] == __DISABLED_CHAR)
-			nr--;
-		tail = (tail+1) & (N_TTY_BUF_SIZE-1);
+#ifdef TCGETX
+
+/**
+ *	set_termiox	-	set termiox fields if possible
+ *	@tty: terminal
+ *	@arg: termiox structure from user
+ *	@opt: option flags for ioctl type
+ *
+ *	Implement the device calling points for the SYS5 termiox ioctl
+ *	interface in Linux
+ */
+
+static int set_termiox(struct tty_struct *tty, void __user *arg, int opt)
+{
+	struct termiox tnew;
+	struct tty_ldisc *ld;
+
+	if (tty->termiox == NULL)
+		return -EINVAL;
+	if (copy_from_user(&tnew, arg, sizeof(struct termiox)))
+		return -EFAULT;
+
+	ld = tty_ldisc_ref(tty);
+	if (ld != NULL) {
+		if ((opt & TERMIOS_FLUSH) && ld->ops->flush_buffer)
+			ld->ops->flush_buffer(tty);
+		tty_ldisc_deref(ld);
 	}
-	return nr;
+	if (opt & TERMIOS_WAIT) {
+		tty_wait_until_sent(tty, 0);
+		if (signal_pending(current))
+			return -EINTR;
+	}
+
+	mutex_lock(&tty->termios_mutex);
+	if (tty->ops->set_termiox)
+		tty->ops->set_termiox(tty, &tnew);
+	mutex_unlock(&tty->termios_mutex);
+	return 0;
 }
 
+#endif
+
+
 #ifdef TIOCGETP
 /*
  * These are deprecated, but there is limited support..
@@ -671,7 +738,7 @@
  *	Updates a terminal from the legacy BSD style terminal information
  *	structure.
  *
- *	Locking: termios_sem
+ *	Locking: termios_mutex
  */
 
 static int set_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb)
@@ -849,6 +916,7 @@
 {
 	struct tty_struct *real_tty;
 	void __user *p = (void __user *)arg;
+	int ret = 0;
 
 	if (tty->driver->type == TTY_DRIVER_TYPE_PTY &&
 	    tty->driver->subtype == PTY_TYPE_MASTER)
@@ -884,18 +952,24 @@
 		return set_termios(real_tty, p, TERMIOS_OLD);
 #ifndef TCGETS2
 	case TCGETS:
+		mutex_lock(&real_tty->termios_mutex);
 		if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios))
-			return -EFAULT;
-		return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 #else
 	case TCGETS:
+		mutex_lock(&real_tty->termios_mutex);
 		if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios))
-			return -EFAULT;
-		return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 	case TCGETS2:
+		mutex_lock(&real_tty->termios_mutex);
 		if (kernel_termios_to_user_termios((struct termios2 __user *)arg, real_tty->termios))
-			return -EFAULT;
-		return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 	case TCSETSF2:
 		return set_termios(real_tty, p,  TERMIOS_FLUSH | TERMIOS_WAIT);
 	case TCSETSW2:
@@ -913,34 +987,59 @@
 		return set_termios(real_tty, p, TERMIOS_TERMIO);
 #ifndef TCGETS2
 	case TIOCGLCKTRMIOS:
+		mutex_lock(&real_tty->termios_mutex);
 		if (kernel_termios_to_user_termios((struct termios __user *)arg, real_tty->termios_locked))
-			return -EFAULT;
-		return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 	case TIOCSLCKTRMIOS:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EPERM;
+		mutex_lock(&real_tty->termios_mutex);
 		if (user_termios_to_kernel_termios(real_tty->termios_locked,
 					       (struct termios __user *) arg))
-			return -EFAULT;
-		return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 #else
 	case TIOCGLCKTRMIOS:
+		mutex_lock(&real_tty->termios_mutex);
 		if (kernel_termios_to_user_termios_1((struct termios __user *)arg, real_tty->termios_locked))
-			return -EFAULT;
-		return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 	case TIOCSLCKTRMIOS:
 		if (!capable(CAP_SYS_ADMIN))
-			return -EPERM;
+			ret = -EPERM;
+		mutex_lock(&real_tty->termios_mutex);
 		if (user_termios_to_kernel_termios_1(real_tty->termios_locked,
 					       (struct termios __user *) arg))
-			return -EFAULT;
-			return 0;
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 #endif
+#ifdef TCGETX
+	case TCGETX:
+		if (real_tty->termiox == NULL)
+			return -EINVAL;
+		mutex_lock(&real_tty->termios_mutex);
+		if (copy_to_user(p, real_tty->termiox, sizeof(struct termiox)))
+			ret = -EFAULT;
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
+	case TCSETX:
+		return set_termiox(real_tty, p, 0);
+	case TCSETXW:
+		return set_termiox(real_tty, p, TERMIOS_WAIT);
+	case TCSETXF:
+		return set_termiox(real_tty, p, TERMIOS_FLUSH);
+#endif		
 	case TIOCGSOFTCAR:
-		/* FIXME: for correctness we may need to take the termios
-		   lock here - review */
-		return put_user(C_CLOCAL(real_tty) ? 1 : 0,
+		mutex_lock(&real_tty->termios_mutex);
+		ret = put_user(C_CLOCAL(real_tty) ? 1 : 0,
 						(int __user *)arg);
+		mutex_unlock(&real_tty->termios_mutex);
+		return ret;
 	case TIOCSSOFTCAR:
 		if (get_user(arg, (unsigned int __user *) arg))
 			return -EFAULT;
@@ -980,7 +1079,7 @@
 }
 EXPORT_SYMBOL_GPL(tty_perform_flush);
 
-int n_tty_ioctl(struct tty_struct *tty, struct file *file,
+int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
 		       unsigned int cmd, unsigned long arg)
 {
 	unsigned long flags;
@@ -1018,13 +1117,6 @@
 		return 0;
 	case TCFLSH:
 		return tty_perform_flush(tty, arg);
-	case TIOCOUTQ:
-		return put_user(tty_chars_in_buffer(tty), (int __user *) arg);
-	case TIOCINQ:
-		retval = tty->read_cnt;
-		if (L_ICANON(tty))
-			retval = inq_canon(tty);
-		return put_user(retval, (unsigned int __user *) arg);
 	case TIOCPKT:
 	{
 		int pktmode;
@@ -1050,4 +1142,4 @@
 		return tty_mode_ioctl(tty, file, cmd, arg);
 	}
 }
-EXPORT_SYMBOL(n_tty_ioctl);
+EXPORT_SYMBOL(n_tty_ioctl_helper);
diff --git a/drivers/char/tty_port.c b/drivers/char/tty_port.c
new file mode 100644
index 0000000..553b0e9
--- /dev/null
+++ b/drivers/char/tty_port.c
@@ -0,0 +1,96 @@
+/*
+ * Tty port functions
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/wait.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+
+void tty_port_init(struct tty_port *port)
+{
+	memset(port, 0, sizeof(*port));
+	init_waitqueue_head(&port->open_wait);
+	init_waitqueue_head(&port->close_wait);
+	mutex_init(&port->mutex);
+	spin_lock_init(&port->lock);
+	port->close_delay = (50 * HZ) / 100;
+	port->closing_wait = (3000 * HZ) / 100;
+}
+EXPORT_SYMBOL(tty_port_init);
+
+int tty_port_alloc_xmit_buf(struct tty_port *port)
+{
+	/* We may sleep in get_zeroed_page() */
+	mutex_lock(&port->mutex);
+	if (port->xmit_buf == NULL)
+		port->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
+	mutex_unlock(&port->mutex);
+	if (port->xmit_buf == NULL)
+		return -ENOMEM;
+	return 0;
+}
+EXPORT_SYMBOL(tty_port_alloc_xmit_buf);
+
+void tty_port_free_xmit_buf(struct tty_port *port)
+{
+	mutex_lock(&port->mutex);
+	if (port->xmit_buf != NULL) {
+		free_page((unsigned long)port->xmit_buf);
+		port->xmit_buf = NULL;
+	}
+	mutex_unlock(&port->mutex);
+}
+EXPORT_SYMBOL(tty_port_free_xmit_buf);
+
+
+/**
+ *	tty_port_tty_get	-	get a tty reference
+ *	@port: tty port
+ *
+ *	Return a refcount protected tty instance or NULL if the port is not
+ *	associated with a tty (eg due to close or hangup)
+ */
+
+struct tty_struct *tty_port_tty_get(struct tty_port *port)
+{
+	unsigned long flags;
+	struct tty_struct *tty;
+
+	spin_lock_irqsave(&port->lock, flags);
+	tty = tty_kref_get(port->tty);
+	spin_unlock_irqrestore(&port->lock, flags);
+	return tty;
+}
+EXPORT_SYMBOL(tty_port_tty_get);
+
+/**
+ *	tty_port_tty_set	-	set the tty of a port
+ *	@port: tty port
+ *	@tty: the tty
+ *
+ *	Associate the port and tty pair. Manages any internal refcounts.
+ *	Pass NULL to deassociate a port
+ */
+
+void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&port->lock, flags);
+	if (port->tty)
+		tty_kref_put(port->tty);
+	port->tty = tty;
+	spin_unlock_irqrestore(&port->lock, flags);
+}
+EXPORT_SYMBOL(tty_port_tty_set);
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index 60359c3..57029fe 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -100,10 +100,10 @@
 #include <linux/font.h>
 #include <linux/bitops.h>
 #include <linux/notifier.h>
-
-#include <asm/io.h>
+#include <linux/device.h>
+#include <linux/io.h>
 #include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #define MAX_NR_CON_DRIVER 16
 
@@ -2136,27 +2136,9 @@
 	    release_console_sem();
 	    return 0;
 	}
-	release_console_sem();
-
 	orig_buf = buf;
 	orig_count = count;
 
-	/* At this point 'buf' is guaranteed to be a kernel buffer
-	 * and therefore no access to userspace (and therefore sleeping)
-	 * will be needed.  The con_buf_mtx serializes all tty based
-	 * console rendering and vcs write/read operations.  We hold
-	 * the console spinlock during the entire write.
-	 */
-
-	acquire_console_sem();
-
-	vc = tty->driver_data;
-	if (vc == NULL) {
-		printk(KERN_ERR "vt: argh, driver_data _became_ NULL !\n");
-		release_console_sem();
-		goto out;
-	}
-
 	himask = vc->vc_hi_font_mask;
 	charmask = himask ? 0x1ff : 0xff;
 
@@ -2370,8 +2352,6 @@
 	FLUSH
 	console_conditional_schedule();
 	release_console_sem();
-
-out:
 	notify_update(vc);
 	return n;
 #undef FLUSH
@@ -2583,8 +2563,6 @@
 	int lines;
 	int ret;
 
-	if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
-		return -EINVAL;
 	if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	if (get_user(type, p))
@@ -2778,6 +2756,12 @@
 		ret = vc_allocate(currcons);
 		if (ret == 0) {
 			struct vc_data *vc = vc_cons[currcons].d;
+
+			/* Still being freed */
+			if (vc->vc_tty) {
+				release_console_sem();
+				return -ERESTARTSYS;
+			}
 			tty->driver_data = vc;
 			vc->vc_tty = tty;
 
@@ -2798,34 +2782,20 @@
 	return ret;
 }
 
-/*
- * We take tty_mutex in here to prevent another thread from coming in via init_dev
- * and taking a ref against the tty while we're in the process of forgetting
- * about it and cleaning things up.
- *
- * This is because vcs_remove_sysfs() can sleep and will drop the BKL.
- */
 static void con_close(struct tty_struct *tty, struct file *filp)
 {
-	mutex_lock(&tty_mutex);
-	acquire_console_sem();
-	if (tty && tty->count == 1) {
-		struct vc_data *vc = tty->driver_data;
+	/* Nothing to do - we defer to shutdown */
+}
 
-		if (vc)
-			vc->vc_tty = NULL;
-		tty->driver_data = NULL;
-		vcs_remove_sysfs(tty);
-		release_console_sem();
-		mutex_unlock(&tty_mutex);
-		/*
-		 * tty_mutex is released, but we still hold BKL, so there is
-		 * still exclusion against init_dev()
-		 */
-		return;
-	}
+static void con_shutdown(struct tty_struct *tty)
+{
+	struct vc_data *vc = tty->driver_data;
+	BUG_ON(vc == NULL);
+	acquire_console_sem();
+	vc->vc_tty = NULL;
+	vcs_remove_sysfs(tty);
 	release_console_sem();
-	mutex_unlock(&tty_mutex);
+	tty_shutdown(tty);
 }
 
 static int default_italic_color    = 2; // green (ASCII)
@@ -2950,10 +2920,19 @@
 	.throttle = con_throttle,
 	.unthrottle = con_unthrottle,
 	.resize = vt_resize,
+	.shutdown = con_shutdown
 };
 
-int __init vty_init(void)
+static struct cdev vc0_cdev;
+
+int __init vty_init(const struct file_operations *console_fops)
 {
+	cdev_init(&vc0_cdev, console_fops);
+	if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
+	    register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
+		panic("Couldn't register /dev/tty0 driver\n");
+	device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
+
 	vcs_init();
 
 	console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
@@ -2972,7 +2951,6 @@
 	tty_set_operations(console_driver, &con_ops);
 	if (tty_register_driver(console_driver))
 		panic("Couldn't register console driver\n");
-
 	kbd_init();
 	console_map_init();
 #ifdef CONFIG_PROM_CONSOLE
@@ -3466,7 +3444,7 @@
 	if (retval)
 		goto err;
 
-	con_driver->dev = device_create_drvdata(vtconsole_class, NULL,
+	con_driver->dev = device_create(vtconsole_class, NULL,
 						MKDEV(0, con_driver->node),
 						NULL, "vtcon%i",
 						con_driver->node);
@@ -3577,7 +3555,7 @@
 		struct con_driver *con = &registered_con_driver[i];
 
 		if (con->con && !con->dev) {
-			con->dev = device_create_drvdata(vtconsole_class, NULL,
+			con->dev = device_create(vtconsole_class, NULL,
 							 MKDEV(0, con->node),
 							 NULL, "vtcon%i",
 							 con->node);
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index c904e9a..8944ce5 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -395,6 +395,8 @@
  
 	kbd = kbd_table + console;
 	switch (cmd) {
+	case TIOCLINUX:
+		return tioclinux(tty, arg);
 	case KIOCSOUND:
 		if (!perm)
 			goto eperm;
diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index 871b0cbc..798d7f3 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1231,7 +1231,7 @@
 	int error = 0;
 	switch (cmd) {
 	default:
-		error = n_tty_ioctl (tty, file, cmd, arg);
+		error = n_tty_ioctl_helper(tty, file, cmd, arg);
 		break;
 	}
 	return error;
diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c
index 5e89fa1..07052ed 100644
--- a/drivers/isdn/gigaset/ser-gigaset.c
+++ b/drivers/isdn/gigaset/ser-gigaset.c
@@ -571,6 +571,7 @@
 	}
 
 	/* prevent other callers from entering ldisc methods */
+	/* FIXME: should use the tty state flags */
 	tty->disc_data = NULL;
 
 	if (!cs->hw.ser)
@@ -642,10 +643,11 @@
 		return -ENXIO;
 
 	switch (cmd) {
-	case TCGETS:
-	case TCGETA:
-		/* pass through to underlying serial device */
-		rc = n_tty_ioctl(tty, file, cmd, arg);
+
+	case FIONREAD:
+		/* unused, always return zero */
+		val = 0;
+		rc = put_user(val, p);
 		break;
 
 	case TCFLSH:
@@ -659,20 +661,13 @@
 			flush_send_queue(cs);
 			break;
 		}
-		/* flush the serial port's buffer */
-		rc = n_tty_ioctl(tty, file, cmd, arg);
-		break;
-
-	case FIONREAD:
-		/* unused, always return zero */
-		val = 0;
-		rc = put_user(val, p);
-		break;
+		/* Pass through */
 
 	default:
-		rc = -ENOIOCTLCMD;
+		/* pass through to underlying serial device */
+		rc = n_tty_ioctl_helper(tty, file, cmd, arg);
+		break;
 	}
-
 	cs_put(cs);
 	return rc;
 }
@@ -680,6 +675,8 @@
 /*
  * Poll on the tty.
  * Unused, always return zero.
+ *
+ * FIXME: should probably return an exception - especially on hangup
  */
 static unsigned int
 gigaset_tty_poll(struct tty_struct *tty, struct file *file, poll_table *wait)
diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 2ae2ec4..21efd99 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -205,7 +205,7 @@
 
 config PC300
 	tristate "Cyclades-PC300 support (RS-232/V.35, X.21, T1/E1 boards)"
-	depends on HDLC && PCI
+	depends on HDLC && PCI && BROKEN
 	---help---
 	  Driver for the Cyclades-PC300 synchronous communication boards.
 
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 9304c45..ed98227 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -5,6 +5,7 @@
  * @remark Read the file COPYING
  *
  * @author John Levon <levon@movementarian.org>
+ * @author Barry Kasindorf
  *
  * This is the core of the buffer management. Each
  * CPU buffer is processed and entered into the
@@ -33,7 +34,7 @@
 #include "event_buffer.h"
 #include "cpu_buffer.h"
 #include "buffer_sync.h"
- 
+
 static LIST_HEAD(dying_tasks);
 static LIST_HEAD(dead_tasks);
 static cpumask_t marked_cpus = CPU_MASK_NONE;
@@ -48,10 +49,11 @@
  * Can be invoked from softirq via RCU callback due to
  * call_rcu() of the task struct, hence the _irqsave.
  */
-static int task_free_notify(struct notifier_block * self, unsigned long val, void * data)
+static int
+task_free_notify(struct notifier_block *self, unsigned long val, void *data)
 {
 	unsigned long flags;
-	struct task_struct * task = data;
+	struct task_struct *task = data;
 	spin_lock_irqsave(&task_mortuary, flags);
 	list_add(&task->tasks, &dying_tasks);
 	spin_unlock_irqrestore(&task_mortuary, flags);
@@ -62,13 +64,14 @@
 /* The task is on its way out. A sync of the buffer means we can catch
  * any remaining samples for this task.
  */
-static int task_exit_notify(struct notifier_block * self, unsigned long val, void * data)
+static int
+task_exit_notify(struct notifier_block *self, unsigned long val, void *data)
 {
 	/* To avoid latency problems, we only process the current CPU,
 	 * hoping that most samples for the task are on this CPU
 	 */
 	sync_buffer(raw_smp_processor_id());
-  	return 0;
+	return 0;
 }
 
 
@@ -77,11 +80,12 @@
  * we don't lose any. This does not have to be exact, it's a QoI issue
  * only.
  */
-static int munmap_notify(struct notifier_block * self, unsigned long val, void * data)
+static int
+munmap_notify(struct notifier_block *self, unsigned long val, void *data)
 {
 	unsigned long addr = (unsigned long)data;
-	struct mm_struct * mm = current->mm;
-	struct vm_area_struct * mpnt;
+	struct mm_struct *mm = current->mm;
+	struct vm_area_struct *mpnt;
 
 	down_read(&mm->mmap_sem);
 
@@ -99,11 +103,12 @@
 	return 0;
 }
 
- 
+
 /* We need to be told about new modules so we don't attribute to a previously
  * loaded module, or drop the samples on the floor.
  */
-static int module_load_notify(struct notifier_block * self, unsigned long val, void * data)
+static int
+module_load_notify(struct notifier_block *self, unsigned long val, void *data)
 {
 #ifdef CONFIG_MODULES
 	if (val != MODULE_STATE_COMING)
@@ -118,7 +123,7 @@
 	return 0;
 }
 
- 
+
 static struct notifier_block task_free_nb = {
 	.notifier_call	= task_free_notify,
 };
@@ -135,7 +140,7 @@
 	.notifier_call = module_load_notify,
 };
 
- 
+
 static void end_sync(void)
 {
 	end_cpu_work();
@@ -208,14 +213,14 @@
  * not strictly necessary but allows oprofile to associate
  * shared-library samples with particular applications
  */
-static unsigned long get_exec_dcookie(struct mm_struct * mm)
+static unsigned long get_exec_dcookie(struct mm_struct *mm)
 {
 	unsigned long cookie = NO_COOKIE;
-	struct vm_area_struct * vma;
- 
+	struct vm_area_struct *vma;
+
 	if (!mm)
 		goto out;
- 
+
 	for (vma = mm->mmap; vma; vma = vma->vm_next) {
 		if (!vma->vm_file)
 			continue;
@@ -235,13 +240,14 @@
  * sure to do this lookup before a mm->mmap modification happens so
  * we don't lose track.
  */
-static unsigned long lookup_dcookie(struct mm_struct * mm, unsigned long addr, off_t * offset)
+static unsigned long
+lookup_dcookie(struct mm_struct *mm, unsigned long addr, off_t *offset)
 {
 	unsigned long cookie = NO_COOKIE;
-	struct vm_area_struct * vma;
+	struct vm_area_struct *vma;
 
 	for (vma = find_vma(mm, addr); vma; vma = vma->vm_next) {
- 
+
 		if (addr < vma->vm_start || addr >= vma->vm_end)
 			continue;
 
@@ -263,9 +269,20 @@
 	return cookie;
 }
 
+static void increment_tail(struct oprofile_cpu_buffer *b)
+{
+	unsigned long new_tail = b->tail_pos + 1;
+
+	rmb();	/* be sure fifo pointers are synchromized */
+
+	if (new_tail < b->buffer_size)
+		b->tail_pos = new_tail;
+	else
+		b->tail_pos = 0;
+}
 
 static unsigned long last_cookie = INVALID_COOKIE;
- 
+
 static void add_cpu_switch(int i)
 {
 	add_event_entry(ESCAPE_CODE);
@@ -278,16 +295,16 @@
 {
 	add_event_entry(ESCAPE_CODE);
 	if (in_kernel)
-		add_event_entry(KERNEL_ENTER_SWITCH_CODE); 
+		add_event_entry(KERNEL_ENTER_SWITCH_CODE);
 	else
-		add_event_entry(KERNEL_EXIT_SWITCH_CODE); 
+		add_event_entry(KERNEL_EXIT_SWITCH_CODE);
 }
- 
+
 static void
-add_user_ctx_switch(struct task_struct const * task, unsigned long cookie)
+add_user_ctx_switch(struct task_struct const *task, unsigned long cookie)
 {
 	add_event_entry(ESCAPE_CODE);
-	add_event_entry(CTX_SWITCH_CODE); 
+	add_event_entry(CTX_SWITCH_CODE);
 	add_event_entry(task->pid);
 	add_event_entry(cookie);
 	/* Another code for daemon back-compat */
@@ -296,7 +313,7 @@
 	add_event_entry(task->tgid);
 }
 
- 
+
 static void add_cookie_switch(unsigned long cookie)
 {
 	add_event_entry(ESCAPE_CODE);
@@ -304,13 +321,78 @@
 	add_event_entry(cookie);
 }
 
- 
+
 static void add_trace_begin(void)
 {
 	add_event_entry(ESCAPE_CODE);
 	add_event_entry(TRACE_BEGIN_CODE);
 }
 
+#ifdef CONFIG_OPROFILE_IBS
+
+#define IBS_FETCH_CODE_SIZE	2
+#define IBS_OP_CODE_SIZE	5
+#define IBS_EIP(offset)				\
+	(((struct op_sample *)&cpu_buf->buffer[(offset)])->eip)
+#define IBS_EVENT(offset)				\
+	(((struct op_sample *)&cpu_buf->buffer[(offset)])->event)
+
+/*
+ * Add IBS fetch and op entries to event buffer
+ */
+static void add_ibs_begin(struct oprofile_cpu_buffer *cpu_buf, int code,
+	int in_kernel, struct mm_struct *mm)
+{
+	unsigned long rip;
+	int i, count;
+	unsigned long ibs_cookie = 0;
+	off_t offset;
+
+	increment_tail(cpu_buf);	/* move to RIP entry */
+
+	rip = IBS_EIP(cpu_buf->tail_pos);
+
+#ifdef __LP64__
+	rip += IBS_EVENT(cpu_buf->tail_pos) << 32;
+#endif
+
+	if (mm) {
+		ibs_cookie = lookup_dcookie(mm, rip, &offset);
+
+		if (ibs_cookie == NO_COOKIE)
+			offset = rip;
+		if (ibs_cookie == INVALID_COOKIE) {
+			atomic_inc(&oprofile_stats.sample_lost_no_mapping);
+			offset = rip;
+		}
+		if (ibs_cookie != last_cookie) {
+			add_cookie_switch(ibs_cookie);
+			last_cookie = ibs_cookie;
+		}
+	} else
+		offset = rip;
+
+	add_event_entry(ESCAPE_CODE);
+	add_event_entry(code);
+	add_event_entry(offset);	/* Offset from Dcookie */
+
+	/* we send the Dcookie offset, but send the raw Linear Add also*/
+	add_event_entry(IBS_EIP(cpu_buf->tail_pos));
+	add_event_entry(IBS_EVENT(cpu_buf->tail_pos));
+
+	if (code == IBS_FETCH_CODE)
+		count = IBS_FETCH_CODE_SIZE;	/*IBS FETCH is 2 int64s*/
+	else
+		count = IBS_OP_CODE_SIZE;	/*IBS OP is 5 int64s*/
+
+	for (i = 0; i < count; i++) {
+		increment_tail(cpu_buf);
+		add_event_entry(IBS_EIP(cpu_buf->tail_pos));
+		add_event_entry(IBS_EVENT(cpu_buf->tail_pos));
+	}
+}
+
+#endif
 
 static void add_sample_entry(unsigned long offset, unsigned long event)
 {
@@ -319,13 +401,13 @@
 }
 
 
-static int add_us_sample(struct mm_struct * mm, struct op_sample * s)
+static int add_us_sample(struct mm_struct *mm, struct op_sample *s)
 {
 	unsigned long cookie;
 	off_t offset;
- 
- 	cookie = lookup_dcookie(mm, s->eip, &offset);
- 
+
+	cookie = lookup_dcookie(mm, s->eip, &offset);
+
 	if (cookie == INVALID_COOKIE) {
 		atomic_inc(&oprofile_stats.sample_lost_no_mapping);
 		return 0;
@@ -341,13 +423,13 @@
 	return 1;
 }
 
- 
+
 /* Add a sample to the global event buffer. If possible the
  * sample is converted into a persistent dentry/offset pair
  * for later lookup from userspace.
  */
 static int
-add_sample(struct mm_struct * mm, struct op_sample * s, int in_kernel)
+add_sample(struct mm_struct *mm, struct op_sample *s, int in_kernel)
 {
 	if (in_kernel) {
 		add_sample_entry(s->eip, s->event);
@@ -359,9 +441,9 @@
 	}
 	return 0;
 }
- 
 
-static void release_mm(struct mm_struct * mm)
+
+static void release_mm(struct mm_struct *mm)
 {
 	if (!mm)
 		return;
@@ -370,9 +452,9 @@
 }
 
 
-static struct mm_struct * take_tasks_mm(struct task_struct * task)
+static struct mm_struct *take_tasks_mm(struct task_struct *task)
 {
-	struct mm_struct * mm = get_task_mm(task);
+	struct mm_struct *mm = get_task_mm(task);
 	if (mm)
 		down_read(&mm->mmap_sem);
 	return mm;
@@ -383,10 +465,10 @@
 {
 	return val == ESCAPE_CODE;
 }
- 
+
 
 /* "acquire" as many cpu buffer slots as we can */
-static unsigned long get_slots(struct oprofile_cpu_buffer * b)
+static unsigned long get_slots(struct oprofile_cpu_buffer *b)
 {
 	unsigned long head = b->head_pos;
 	unsigned long tail = b->tail_pos;
@@ -412,19 +494,6 @@
 }
 
 
-static void increment_tail(struct oprofile_cpu_buffer * b)
-{
-	unsigned long new_tail = b->tail_pos + 1;
-
-	rmb();
-
-	if (new_tail < b->buffer_size)
-		b->tail_pos = new_tail;
-	else
-		b->tail_pos = 0;
-}
-
-
 /* Move tasks along towards death. Any tasks on dead_tasks
  * will definitely have no remaining references in any
  * CPU buffers at this point, because we use two lists,
@@ -435,8 +504,8 @@
 {
 	unsigned long flags;
 	LIST_HEAD(local_dead_tasks);
-	struct task_struct * task;
-	struct task_struct * ttask;
+	struct task_struct *task;
+	struct task_struct *ttask;
 
 	spin_lock_irqsave(&task_mortuary, flags);
 
@@ -493,7 +562,7 @@
 {
 	struct oprofile_cpu_buffer *cpu_buf = &per_cpu(cpu_buffer, cpu);
 	struct mm_struct *mm = NULL;
-	struct task_struct * new;
+	struct task_struct *new;
 	unsigned long cookie = 0;
 	int in_kernel = 1;
 	unsigned int i;
@@ -501,7 +570,7 @@
 	unsigned long available;
 
 	mutex_lock(&buffer_mutex);
- 
+
 	add_cpu_switch(cpu);
 
 	/* Remember, only we can modify tail_pos */
@@ -509,8 +578,8 @@
 	available = get_slots(cpu_buf);
 
 	for (i = 0; i < available; ++i) {
-		struct op_sample * s = &cpu_buf->buffer[cpu_buf->tail_pos];
- 
+		struct op_sample *s = &cpu_buf->buffer[cpu_buf->tail_pos];
+
 		if (is_code(s->eip)) {
 			if (s->event <= CPU_IS_KERNEL) {
 				/* kernel/userspace switch */
@@ -521,8 +590,18 @@
 			} else if (s->event == CPU_TRACE_BEGIN) {
 				state = sb_bt_start;
 				add_trace_begin();
+#ifdef CONFIG_OPROFILE_IBS
+			} else if (s->event == IBS_FETCH_BEGIN) {
+				state = sb_bt_start;
+				add_ibs_begin(cpu_buf,
+					IBS_FETCH_CODE, in_kernel, mm);
+			} else if (s->event == IBS_OP_BEGIN) {
+				state = sb_bt_start;
+				add_ibs_begin(cpu_buf,
+					IBS_OP_CODE, in_kernel, mm);
+#endif
 			} else {
-				struct mm_struct * oldmm = mm;
+				struct mm_struct *oldmm = mm;
 
 				/* userspace context switch */
 				new = (struct task_struct *)s->event;
@@ -533,13 +612,11 @@
 					cookie = get_exec_dcookie(mm);
 				add_user_ctx_switch(new, cookie);
 			}
-		} else {
-			if (state >= sb_bt_start &&
-			    !add_sample(mm, s, in_kernel)) {
-				if (state == sb_bt_start) {
-					state = sb_bt_ignore;
-					atomic_inc(&oprofile_stats.bt_lost_no_mapping);
-				}
+		} else if (state >= sb_bt_start &&
+			   !add_sample(mm, s, in_kernel)) {
+			if (state == sb_bt_start) {
+				state = sb_bt_ignore;
+				atomic_inc(&oprofile_stats.bt_lost_no_mapping);
 			}
 		}
 
diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index 7ba78e6..e1bd5a9 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -5,6 +5,7 @@
  * @remark Read the file COPYING
  *
  * @author John Levon <levon@movementarian.org>
+ * @author Barry Kasindorf <barry.kasindorf@amd.com>
  *
  * Each CPU has a local buffer that stores PC value/event
  * pairs. We also log context switches when we notice them.
@@ -209,7 +210,7 @@
 	return 1;
 }
 
-static int oprofile_begin_trace(struct oprofile_cpu_buffer * cpu_buf)
+static int oprofile_begin_trace(struct oprofile_cpu_buffer *cpu_buf)
 {
 	if (nr_available_slots(cpu_buf) < 4) {
 		cpu_buf->sample_lost_overflow++;
@@ -254,6 +255,75 @@
 	oprofile_add_ext_sample(pc, regs, event, is_kernel);
 }
 
+#ifdef CONFIG_OPROFILE_IBS
+
+#define MAX_IBS_SAMPLE_SIZE	14
+static int log_ibs_sample(struct oprofile_cpu_buffer *cpu_buf,
+	unsigned long pc, int is_kernel, unsigned  int *ibs, int ibs_code)
+{
+	struct task_struct *task;
+
+	cpu_buf->sample_received++;
+
+	if (nr_available_slots(cpu_buf) < MAX_IBS_SAMPLE_SIZE) {
+		cpu_buf->sample_lost_overflow++;
+		return 0;
+	}
+
+	is_kernel = !!is_kernel;
+
+	/* notice a switch from user->kernel or vice versa */
+	if (cpu_buf->last_is_kernel != is_kernel) {
+		cpu_buf->last_is_kernel = is_kernel;
+		add_code(cpu_buf, is_kernel);
+	}
+
+	/* notice a task switch */
+	if (!is_kernel) {
+		task = current;
+
+		if (cpu_buf->last_task != task) {
+			cpu_buf->last_task = task;
+			add_code(cpu_buf, (unsigned long)task);
+		}
+	}
+
+	add_code(cpu_buf, ibs_code);
+	add_sample(cpu_buf, ibs[0], ibs[1]);
+	add_sample(cpu_buf, ibs[2], ibs[3]);
+	add_sample(cpu_buf, ibs[4], ibs[5]);
+
+	if (ibs_code == IBS_OP_BEGIN) {
+	add_sample(cpu_buf, ibs[6], ibs[7]);
+	add_sample(cpu_buf, ibs[8], ibs[9]);
+	add_sample(cpu_buf, ibs[10], ibs[11]);
+	}
+
+	return 1;
+}
+
+void oprofile_add_ibs_sample(struct pt_regs *const regs,
+				unsigned int * const ibs_sample, u8 code)
+{
+	int is_kernel = !user_mode(regs);
+	unsigned long pc = profile_pc(regs);
+
+	struct oprofile_cpu_buffer *cpu_buf =
+			 &per_cpu(cpu_buffer, smp_processor_id());
+
+	if (!backtrace_depth) {
+		log_ibs_sample(cpu_buf, pc, is_kernel, ibs_sample, code);
+		return;
+	}
+
+	/* if log_sample() fails we can't backtrace since we lost the source
+	* of this event */
+	if (log_ibs_sample(cpu_buf, pc, is_kernel, ibs_sample, code))
+		oprofile_ops.backtrace(regs, backtrace_depth);
+}
+
+#endif
+
 void oprofile_add_pc(unsigned long pc, int is_kernel, unsigned long event)
 {
 	struct oprofile_cpu_buffer *cpu_buf = &__get_cpu_var(cpu_buffer);
@@ -296,7 +366,7 @@
 	struct oprofile_cpu_buffer * b =
 		container_of(work, struct oprofile_cpu_buffer, work.work);
 	if (b->cpu != smp_processor_id()) {
-		printk("WQ on CPU%d, prefer CPU%d\n",
+		printk(KERN_DEBUG "WQ on CPU%d, prefer CPU%d\n",
 		       smp_processor_id(), b->cpu);
 	}
 	sync_buffer(b->cpu);
diff --git a/drivers/oprofile/cpu_buffer.h b/drivers/oprofile/cpu_buffer.h
index c3e366b..9c44d00 100644
--- a/drivers/oprofile/cpu_buffer.h
+++ b/drivers/oprofile/cpu_buffer.h
@@ -55,5 +55,7 @@
 /* transient events for the CPU buffer -> event buffer */
 #define CPU_IS_KERNEL 1
 #define CPU_TRACE_BEGIN 2
+#define IBS_FETCH_BEGIN 3
+#define IBS_OP_BEGIN    4
 
 #endif /* OPROFILE_CPU_BUFFER_H */
diff --git a/drivers/s390/char/fs3270.c b/drivers/s390/char/fs3270.c
index d18e6d2..40759c3 100644
--- a/drivers/s390/char/fs3270.c
+++ b/drivers/s390/char/fs3270.c
@@ -418,25 +418,22 @@
 {
 	struct fs3270 *fp;
 	struct idal_buffer *ib;
-	int minor, rc;
+	int minor, rc = 0;
 
 	if (imajor(filp->f_path.dentry->d_inode) != IBM_FS3270_MAJOR)
 		return -ENODEV;
-	lock_kernel();
 	minor = iminor(filp->f_path.dentry->d_inode);
 	/* Check for minor 0 multiplexer. */
 	if (minor == 0) {
-		struct tty_struct *tty;
-		mutex_lock(&tty_mutex);
-		tty = get_current_tty();
+		struct tty_struct *tty = get_current_tty();
 		if (!tty || tty->driver->major != IBM_TTY3270_MAJOR) {
-			mutex_unlock(&tty_mutex);
-			rc = -ENODEV;
-			goto out;
+			tty_kref_put(tty);
+			return -ENODEV;
 		}
 		minor = tty->index + RAW3270_FIRSTMINOR;
-		mutex_unlock(&tty_mutex);
+		tty_kref_put(tty);
 	}
+	lock_kernel();
 	/* Check if some other program is already using fullscreen mode. */
 	fp = (struct fs3270 *) raw3270_find_view(&fs3270_fn, minor);
 	if (!IS_ERR(fp)) {
@@ -478,7 +475,7 @@
 	filp->private_data = fp;
 out:
 	unlock_kernel();
-	return 0;
+	return rc;
 }
 
 /*
diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 9ccc563..d4104a3 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -44,6 +44,10 @@
 
 #include "8250.h"
 
+#ifdef CONFIG_SPARC
+#include "suncore.h"
+#endif
+
 /*
  * Configuration:
  *   share_irqs - whether we pass IRQF_SHARED to request_irq().  This option
@@ -53,6 +57,13 @@
 
 static unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS;
 
+static struct uart_driver serial8250_reg;
+
+static int serial_index(struct uart_port *port)
+{
+	return (serial8250_reg.minor - 64) + port->line;
+}
+
 /*
  * Debugging.
  */
@@ -536,7 +547,7 @@
 /*
  * FIFO support.
  */
-static inline void serial8250_clear_fifos(struct uart_8250_port *p)
+static void serial8250_clear_fifos(struct uart_8250_port *p)
 {
 	if (p->capabilities & UART_CAP_FIFO) {
 		serial_outp(p, UART_FCR, UART_FCR_ENABLE_FIFO);
@@ -551,7 +562,7 @@
  * capability" bit enabled.  Note that on XR16C850s, we need to
  * reset LCR to write to IER.
  */
-static inline void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
+static void serial8250_set_sleep(struct uart_8250_port *p, int sleep)
 {
 	if (p->capabilities & UART_CAP_SLEEP) {
 		if (p->capabilities & UART_CAP_EFR) {
@@ -993,7 +1004,7 @@
 		return;
 
 	DEBUG_AUTOCONF("ttyS%d: autoconf (0x%04x, 0x%p): ",
-			up->port.line, up->port.iobase, up->port.membase);
+		       serial_index(&up->port), up->port.iobase, up->port.membase);
 
 	/*
 	 * We really do need global IRQs disabled here - we're going to
@@ -1128,8 +1139,8 @@
 	if (up->capabilities != uart_config[up->port.type].flags) {
 		printk(KERN_WARNING
 		       "ttyS%d: detected caps %08x should be %08x\n",
-			up->port.line, up->capabilities,
-			uart_config[up->port.type].flags);
+		       serial_index(&up->port), up->capabilities,
+		       uart_config[up->port.type].flags);
 	}
 
 	up->port.fifosize = uart_config[up->port.type].fifo_size;
@@ -1424,8 +1435,7 @@
 /*
  * This handles the interrupt from one port.
  */
-static inline void
-serial8250_handle_port(struct uart_8250_port *up)
+static void serial8250_handle_port(struct uart_8250_port *up)
 {
 	unsigned int status;
 	unsigned long flags;
@@ -1719,7 +1729,7 @@
 /*
  *	Wait for transmitter & holding register to empty
  */
-static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
+static void wait_for_xmitr(struct uart_8250_port *up, int bits)
 {
 	unsigned int status, tmout = 10000;
 
@@ -1854,7 +1864,8 @@
 	 */
 	if (!(up->port.flags & UPF_BUGGY_UART) &&
 	    (serial_inp(up, UART_LSR) == 0xff)) {
-		printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
+		printk(KERN_INFO "ttyS%d: LSR safety check engaged!\n",
+		       serial_index(&up->port));
 		return -ENODEV;
 	}
 
@@ -1909,7 +1920,8 @@
 		 */
 		if (!(iir1 & UART_IIR_NO_INT) && (iir & UART_IIR_NO_INT)) {
 			up->bugs |= UART_BUG_THRE;
-			pr_debug("ttyS%d - using backup timer\n", port->line);
+			pr_debug("ttyS%d - using backup timer\n",
+				 serial_index(port));
 		}
 	}
 
@@ -1969,7 +1981,7 @@
 		if (!(up->bugs & UART_BUG_TXEN)) {
 			up->bugs |= UART_BUG_TXEN;
 			pr_debug("ttyS%d - enabling bad tx status workarounds\n",
-				 port->line);
+				 serial_index(port));
 		}
 	} else {
 		up->bugs &= ~UART_BUG_TXEN;
@@ -2630,7 +2642,6 @@
 	return serial8250_find_port_for_earlycon();
 }
 
-static struct uart_driver serial8250_reg;
 static struct console serial8250_console = {
 	.name		= "ttyS",
 	.write		= serial8250_console_write,
@@ -2677,7 +2688,6 @@
 	.dev_name		= "ttyS",
 	.major			= TTY_MAJOR,
 	.minor			= 64,
-	.nr			= UART_NR,
 	.cons			= SERIAL8250_CONSOLE,
 };
 
@@ -2959,10 +2969,12 @@
 		"%d ports, IRQ sharing %sabled\n", nr_uarts,
 		share_irqs ? "en" : "dis");
 
-	for (i = 0; i < NR_IRQS; i++)
-		spin_lock_init(&irq_lists[i].lock);
-
+#ifdef CONFIG_SPARC
+	ret = sunserial_register_minors(&serial8250_reg, UART_NR);
+#else
+	serial8250_reg.nr = UART_NR;
 	ret = uart_register_driver(&serial8250_reg);
+#endif
 	if (ret)
 		goto out;
 
@@ -2987,7 +2999,11 @@
  put_dev:
 	platform_device_put(serial8250_isa_devs);
  unreg_uart_drv:
+#ifdef CONFIG_SPARC
+	sunserial_unregister_minors(&serial8250_reg, UART_NR);
+#else
 	uart_unregister_driver(&serial8250_reg);
+#endif
  out:
 	return ret;
 }
@@ -3006,7 +3022,11 @@
 	platform_driver_unregister(&serial8250_isa_driver);
 	platform_device_unregister(isa_dev);
 
+#ifdef CONFIG_SPARC
+	sunserial_unregister_minors(&serial8250_reg, UART_NR);
+#else
 	uart_unregister_driver(&serial8250_reg);
+#endif
 }
 
 module_init(serial8250_init);
diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index c2f2393..c014ffb 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -2041,9 +2041,9 @@
 		 * The device may have been disabled.  Re-enable it.
 		 */
 		err = pci_enable_device(dev);
+		/* FIXME: We cannot simply error out here */
 		if (err)
-			return err;
-
+			printk(KERN_ERR "pciserial: Unable to re-enable ports, trying to continue.\n");
 		pciserial_resume_ports(priv);
 	}
 	return 0;
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index 77cb342..31786b3 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -9,7 +9,6 @@
 # The new 8250/16550 serial drivers
 config SERIAL_8250
 	tristate "8250/16550 and compatible serial support"
-	depends on (BROKEN || !SPARC)
 	select SERIAL_CORE
 	---help---
 	  This selects whether you want to include the driver for the standard
@@ -994,24 +993,12 @@
 	bool "Support RTS/CTS on 68328 serial port"
 	depends on SERIAL_68328
 
-config SERIAL_COLDFIRE
-	bool "ColdFire serial support (DEPRECATED)"
-	depends on COLDFIRE
-	help
-	  This driver supports the built-in serial ports of the Motorola ColdFire
-	  family of CPUs.
-	  This driver is deprecated because it supports only the old interface
-	  for serial drivers and features like magic keys are not working.
-	  Please switch to the new style driver because this driver will be
-	  removed soon.
-
 config SERIAL_MCF
-	bool "Coldfire serial support (new style driver)"
+	bool "Coldfire serial support"
 	depends on COLDFIRE
 	select SERIAL_CORE
 	help
-	  This new serial driver supports the Freescale Coldfire serial ports
-	  using the new serial driver subsystem.
+	  This serial driver supports the Freescale Coldfire serial ports.
 
 config SERIAL_MCF_BAUDRATE
 	int "Default baudrate for Coldfire serial ports"
diff --git a/drivers/serial/Makefile b/drivers/serial/Makefile
index 7e7383e..0c17c8d 100644
--- a/drivers/serial/Makefile
+++ b/drivers/serial/Makefile
@@ -4,6 +4,16 @@
 
 obj-$(CONFIG_SERIAL_CORE) += serial_core.o
 obj-$(CONFIG_SERIAL_21285) += 21285.o
+
+# These Sparc drivers have to appear before others such as 8250
+# which share ttySx minor node space.  Otherwise console device
+# names change and other unplesantries.
+obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o
+obj-$(CONFIG_SERIAL_SUNHV) += sunhv.o
+obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o
+obj-$(CONFIG_SERIAL_SUNSU) += sunsu.o
+obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o
+
 obj-$(CONFIG_SERIAL_8250) += 8250.o
 obj-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o
 obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o
@@ -31,16 +41,10 @@
 obj-$(CONFIG_SERIAL_S3C2410) += s3c2410.o
 obj-$(CONFIG_SERIAL_S3C2412) += s3c2412.o
 obj-$(CONFIG_SERIAL_S3C2440) += s3c2440.o
-obj-$(CONFIG_SERIAL_SUNCORE) += suncore.o
-obj-$(CONFIG_SERIAL_SUNHV) += sunhv.o
-obj-$(CONFIG_SERIAL_SUNZILOG) += sunzilog.o
 obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o
-obj-$(CONFIG_SERIAL_SUNSU) += sunsu.o
-obj-$(CONFIG_SERIAL_SUNSAB) += sunsab.o
 obj-$(CONFIG_SERIAL_MUX) += mux.o
 obj-$(CONFIG_SERIAL_68328) += 68328serial.o
 obj-$(CONFIG_SERIAL_68360) += 68360serial.o
-obj-$(CONFIG_SERIAL_COLDFIRE) += mcfserial.o
 obj-$(CONFIG_SERIAL_MCF) += mcf.o
 obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o
 obj-$(CONFIG_SERIAL_LH7A40X) += serial_lh7a40x.o
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 4a0d30b..569f0e2 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -1,7 +1,7 @@
 /*
  * Blackfin On-Chip Serial Driver
  *
- * Copyright 2006-2007 Analog Devices Inc.
+ * Copyright 2006-2008 Analog Devices Inc.
  *
  * Enter bugs at http://blackfin.uclinux.org/
  *
@@ -42,6 +42,9 @@
 #define BFIN_SERIAL_MAJOR	204
 #define BFIN_SERIAL_MINOR	64
 
+static struct bfin_serial_port bfin_serial_ports[BFIN_UART_NR_PORTS];
+static int nr_active_ports = ARRAY_SIZE(bfin_serial_resource);
+
 /*
  * Setup for console. Argument comes from the menuconfig
  */
@@ -126,13 +129,13 @@
 void kgdb_put_debug_char(int chr)
 {
 	struct bfin_serial_port *uart;
-	
+
 	if (CONFIG_KGDB_UART_PORT < 0
 		|| CONFIG_KGDB_UART_PORT >= BFIN_UART_NR_PORTS)
 		uart = &bfin_serial_ports[0];
 	else
 		uart = &bfin_serial_ports[CONFIG_KGDB_UART_PORT];
-	
+
 	while (!(UART_GET_LSR(uart) & THRE)) {
 		SSYNC();
 	}
@@ -152,7 +155,7 @@
 		uart = &bfin_serial_ports[0];
 	else
 		uart = &bfin_serial_ports[CONFIG_KGDB_UART_PORT];
-	
+
 	while(!(UART_GET_LSR(uart) & DR)) {
 		SSYNC();
 	}
@@ -298,7 +301,11 @@
 	bfin_serial_mctrl_check(uart);
 
 	if (uart_circ_empty(xmit) || uart_tx_stopped(&uart->port)) {
-		bfin_serial_stop_tx(&uart->port);
+#ifdef CONFIG_BF54x
+		/* Clear TFI bit */
+		UART_PUT_LSR(uart, TFI);
+#endif
+		UART_CLEAR_IER(uart, ETBEI);
 		return;
 	}
 
@@ -317,9 +324,6 @@
 
 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
 		uart_write_wakeup(&uart->port);
-
-	if (uart_circ_empty(xmit))
-		bfin_serial_stop_tx(&uart->port);
 }
 
 static irqreturn_t bfin_serial_rx_int(int irq, void *dev_id)
@@ -645,6 +649,42 @@
 		free_irq(uart->port.irq, uart);
 		return -EBUSY;
 	}
+
+# ifdef CONFIG_BF54x
+	{
+		unsigned uart_dma_ch_rx, uart_dma_ch_tx;
+
+		switch (uart->port.irq) {
+		case IRQ_UART3_RX:
+			uart_dma_ch_rx = CH_UART3_RX;
+			uart_dma_ch_tx = CH_UART3_TX;
+			break;
+		case IRQ_UART2_RX:
+			uart_dma_ch_rx = CH_UART2_RX;
+			uart_dma_ch_tx = CH_UART2_TX;
+			break;
+		default:
+			uart_dma_ch_rx = uart_dma_ch_tx = 0;
+			break;
+		};
+
+		if (uart_dma_ch_rx &&
+			request_dma(uart_dma_ch_rx, "BFIN_UART_RX") < 0) {
+			printk(KERN_NOTICE"Fail to attach UART interrupt\n");
+			free_irq(uart->port.irq, uart);
+			free_irq(uart->port.irq + 1, uart);
+			return -EBUSY;
+		}
+		if (uart_dma_ch_tx &&
+			request_dma(uart_dma_ch_tx, "BFIN_UART_TX") < 0) {
+			printk(KERN_NOTICE "Fail to attach UART interrupt\n");
+			free_dma(uart_dma_ch_rx);
+			free_irq(uart->port.irq, uart);
+			free_irq(uart->port.irq + 1, uart);
+			return -EBUSY;
+		}
+	}
+# endif
 #endif
 	UART_SET_IER(uart, ERBFI);
 	return 0;
@@ -662,6 +702,20 @@
 	del_timer(&(uart->rx_dma_timer));
 	dma_free_coherent(NULL, PAGE_SIZE, uart->rx_dma_buf.buf, 0);
 #else
+#ifdef CONFIG_BF54x
+	switch (uart->port.irq) {
+	case IRQ_UART3_RX:
+		free_dma(CH_UART3_RX);
+		free_dma(CH_UART3_TX);
+		break;
+	case IRQ_UART2_RX:
+		free_dma(CH_UART2_RX);
+		free_dma(CH_UART2_TX);
+		break;
+	default:
+		break;
+	};
+#endif
 #ifdef	CONFIG_KGDB_UART
 	if (uart->port.line != CONFIG_KGDB_UART_PORT)
 #endif
@@ -757,6 +811,9 @@
 	val |= UCEN;
 	UART_PUT_GCTL(uart, val);
 
+	/* Port speed changed, update the per-port timeout. */
+	uart_update_timeout(port, termios->c_cflag, baud);
+
 	spin_unlock_irqrestore(&uart->port.lock, flags);
 }
 
@@ -859,8 +916,9 @@
 		return;
 	first = 0;
 
-	for (i = 0; i < nr_ports; i++) {
+	for (i = 0; i < nr_active_ports; i++) {
 		bfin_serial_ports[i].port.uartclk   = get_sclk();
+		bfin_serial_ports[i].port.fifosize  = BFIN_UART_TX_FIFO_SIZE;
 		bfin_serial_ports[i].port.ops       = &bfin_serial_pops;
 		bfin_serial_ports[i].port.line      = i;
 		bfin_serial_ports[i].port.iotype    = UPIO_MEM;
@@ -961,7 +1019,7 @@
 	 * if so, search for the first available port that does have
 	 * console support.
 	 */
-	if (co->index == -1 || co->index >= nr_ports)
+	if (co->index == -1 || co->index >= nr_active_ports)
 		co->index = 0;
 	uart = &bfin_serial_ports[co->index];
 
@@ -1056,7 +1114,7 @@
 	}
 }
 
-static struct __init console bfin_early_serial_console = {
+static struct __initdata console bfin_early_serial_console = {
 	.name = "early_BFuart",
 	.write = early_serial_write,
 	.device = uart_console_device,
@@ -1072,7 +1130,7 @@
 	struct bfin_serial_port *uart;
 	struct ktermios t;
 
-	if (port == -1 || port >= nr_ports)
+	if (port == -1 || port >= nr_active_ports)
 		port = 0;
 	bfin_serial_init_ports();
 	bfin_early_serial_console.index = port;
@@ -1100,20 +1158,26 @@
 
 static int bfin_serial_suspend(struct platform_device *dev, pm_message_t state)
 {
-	struct bfin_serial_port *uart = platform_get_drvdata(dev);
+	int i;
 
-	if (uart)
-		uart_suspend_port(&bfin_serial_reg, &uart->port);
+	for (i = 0; i < nr_active_ports; i++) {
+		if (bfin_serial_ports[i].port.dev != &dev->dev)
+			continue;
+		uart_suspend_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
+	}
 
 	return 0;
 }
 
 static int bfin_serial_resume(struct platform_device *dev)
 {
-	struct bfin_serial_port *uart = platform_get_drvdata(dev);
+	int i;
 
-	if (uart)
-		uart_resume_port(&bfin_serial_reg, &uart->port);
+	for (i = 0; i < nr_active_ports; i++) {
+		if (bfin_serial_ports[i].port.dev != &dev->dev)
+			continue;
+		uart_resume_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
+	}
 
 	return 0;
 }
@@ -1128,32 +1192,31 @@
 			break;
 
 	if (i < dev->num_resources) {
-		for (i = 0; i < nr_ports; i++, res++) {
+		for (i = 0; i < nr_active_ports; i++, res++) {
 			if (bfin_serial_ports[i].port.mapbase != res->start)
 				continue;
 			bfin_serial_ports[i].port.dev = &dev->dev;
 			uart_add_one_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
-			platform_set_drvdata(dev, &bfin_serial_ports[i]);
 		}
 	}
 
 	return 0;
 }
 
-static int bfin_serial_remove(struct platform_device *pdev)
+static int bfin_serial_remove(struct platform_device *dev)
 {
-	struct bfin_serial_port *uart = platform_get_drvdata(pdev);
+	int i;
 
-
+	for (i = 0; i < nr_active_ports; i++) {
+		if (bfin_serial_ports[i].port.dev != &dev->dev)
+			continue;
+		uart_remove_one_port(&bfin_serial_reg, &bfin_serial_ports[i].port);
+		bfin_serial_ports[i].port.dev = NULL;
 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
-	gpio_free(uart->cts_pin);
-	gpio_free(uart->rts_pin);
+		gpio_free(bfin_serial_ports[i].cts_pin);
+		gpio_free(bfin_serial_ports[i].rts_pin);
 #endif
-
-	platform_set_drvdata(pdev, NULL);
-
-	if (uart)
-		uart_remove_one_port(&bfin_serial_reg, &uart->port);
+	}
 
 	return 0;
 }
diff --git a/drivers/serial/crisv10.c b/drivers/serial/crisv10.c
index bf94a77..211c217 100644
--- a/drivers/serial/crisv10.c
+++ b/drivers/serial/crisv10.c
@@ -457,7 +457,6 @@
 #define NR_PORTS (sizeof(rs_table)/sizeof(struct e100_serial))
 
 static struct ktermios *serial_termios[NR_PORTS];
-static struct ktermios *serial_termios_locked[NR_PORTS];
 #ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER
 static struct fast_timer fast_timers[NR_PORTS];
 #endif
@@ -4419,6 +4418,7 @@
 			rs485_pa_bit)) {
 		printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
 			"RS485 pin\n");
+		put_tty_driver(driver);
 		return -EBUSY;
 	}
 #endif
@@ -4427,6 +4427,7 @@
 			rs485_port_g_bit)) {
 		printk(KERN_CRIT "ETRAX100LX serial: Could not allocate "
 			"RS485 pin\n");
+		put_tty_driver(driver);
 		return -EBUSY;
 	}
 #endif
@@ -4446,8 +4447,6 @@
 	driver->init_termios.c_ispeed = 115200;
 	driver->init_termios.c_ospeed = 115200;
 	driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-	driver->termios = serial_termios;
-	driver->termios_locked = serial_termios_locked;
 
 	tty_set_operations(driver, &rs_ops);
         serial_driver = driver;
diff --git a/drivers/serial/mcfserial.c b/drivers/serial/mcfserial.c
deleted file mode 100644
index fbe3835..0000000
--- a/drivers/serial/mcfserial.c
+++ /dev/null
@@ -1,1965 +0,0 @@
-#warning This driver is deprecated. Check Kconfig for details.
-/*
- * mcfserial.c -- serial driver for ColdFire internal UARTS.
- *
- * Copyright (C) 1999-2003 Greg Ungerer <gerg@snapgear.com>
- * Copyright (c) 2000-2001 Lineo, Inc. <www.lineo.com> 
- * Copyright (C) 2001-2002 SnapGear Inc. <www.snapgear.com> 
- *
- * Based on code from 68332serial.c which was:
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1998 TSHG
- * Copyright (c) 1999 Rt-Control Inc. <jeff@uclinux.org>
- *
- * Changes:
- * 08/07/2003    Daniele Bellucci <bellucda@tiscali.it>
- *               some cleanups in mcfrs_write.
- *
- */
- 
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/wait.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/system.h>
-#include <asm/delay.h>
-#include <asm/coldfire.h>
-#include <asm/mcfsim.h>
-#include <asm/mcfuart.h>
-#include <asm/nettel.h>
-#include <asm/uaccess.h>
-#include "mcfserial.h"
-
-struct timer_list mcfrs_timer_struct;
-
-/*
- *	Default console baud rate,  we use this as the default
- *	for all ports so init can just open /dev/console and
- *	keep going.  Perhaps one day the cflag settings for the
- *	console can be used instead.
- */
-#if defined(CONFIG_HW_FEITH)
-#define	CONSOLE_BAUD_RATE	38400
-#define	DEFAULT_CBAUD		B38400
-#elif defined(CONFIG_MOD5272) || defined(CONFIG_M5208EVB) || \
-      defined(CONFIG_M5329EVB) || defined(CONFIG_GILBARCO)
-#define CONSOLE_BAUD_RATE 	115200
-#define DEFAULT_CBAUD		B115200
-#elif defined(CONFIG_ARNEWSH) || defined(CONFIG_FREESCALE) || \
-      defined(CONFIG_senTec) || defined(CONFIG_SNEHA) || defined(CONFIG_AVNET)
-#define	CONSOLE_BAUD_RATE	19200
-#define	DEFAULT_CBAUD		B19200
-#endif
-
-#ifndef CONSOLE_BAUD_RATE
-#define	CONSOLE_BAUD_RATE	9600
-#define	DEFAULT_CBAUD		B9600
-#endif
-
-int mcfrs_console_inited = 0;
-int mcfrs_console_port = -1;
-int mcfrs_console_baud = CONSOLE_BAUD_RATE;
-int mcfrs_console_cbaud = DEFAULT_CBAUD;
-
-/*
- *	Driver data structures.
- */
-static struct tty_driver *mcfrs_serial_driver;
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS 256
-
-/* Debugging...
- */
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-
-#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
-    defined(CONFIG_M520x) || defined(CONFIG_M532x)
-#define	IRQBASE	(MCFINT_VECBASE+MCFINT_UART0)
-#else
-#define	IRQBASE	73
-#endif
-
-/*
- *	Configuration table, UARTs to look for at startup.
- */
-static struct mcf_serial mcfrs_table[] = {
-	{  /* ttyS0 */
-		.magic = 0,
-		.addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE1),
-		.irq = IRQBASE,
-		.flags = ASYNC_BOOT_AUTOCONF,
-	},
-#ifdef MCFUART_BASE2
-	{  /* ttyS1 */
-		.magic = 0,
-		.addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE2),
-		.irq = IRQBASE+1,
-		.flags = ASYNC_BOOT_AUTOCONF,
-	},
-#endif
-#ifdef MCFUART_BASE3
-	{  /* ttyS2 */
-		.magic = 0,
-		.addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE3),
-		.irq = IRQBASE+2,
-		.flags = ASYNC_BOOT_AUTOCONF,
-	},
-#endif
-#ifdef MCFUART_BASE4
-	{  /* ttyS3 */
-		.magic = 0,
-		.addr = (volatile unsigned char *) (MCF_MBAR+MCFUART_BASE4),
-		.irq = IRQBASE+3,
-		.flags = ASYNC_BOOT_AUTOCONF,
-	},
-#endif
-};
-
-
-#define	NR_PORTS	(sizeof(mcfrs_table) / sizeof(struct mcf_serial))
-
-/*
- * This is used to figure out the divisor speeds and the timeouts.
- */
-static int mcfrs_baud_table[] = {
-	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
-	9600, 19200, 38400, 57600, 115200, 230400, 460800, 0
-};
-#define MCFRS_BAUD_TABLE_SIZE \
-			(sizeof(mcfrs_baud_table)/sizeof(mcfrs_baud_table[0]))
-
-
-#ifdef CONFIG_MAGIC_SYSRQ
-/*
- *	Magic system request keys. Used for debugging...
- */
-extern int	magic_sysrq_key(int ch);
-#endif
-
-
-/*
- *	Forware declarations...
- */
-static void	mcfrs_change_speed(struct mcf_serial *info);
-static void	mcfrs_wait_until_sent(struct tty_struct *tty, int timeout);
-
-
-static inline int serial_paranoia_check(struct mcf_serial *info,
-					char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
-	static const char badmagic[] =
-		"MCFRS(warning): bad magic number for serial struct %s in %s\n";
-	static const char badinfo[] =
-		"MCFRS(warning): null mcf_serial for %s in %s\n";
-
-	if (!info) {
-		printk(badinfo, name, routine);
-		return 1;
-	}
-	if (info->magic != SERIAL_MAGIC) {
-		printk(badmagic, name, routine);
-		return 1;
-	}
-#endif
-	return 0;
-}
-
-/*
- *	Sets or clears DTR and RTS on the requested line.
- */
-static void mcfrs_setsignals(struct mcf_serial *info, int dtr, int rts)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-	
-#if 0
-	printk("%s(%d): mcfrs_setsignals(info=%x,dtr=%d,rts=%d)\n",
-		__FILE__, __LINE__, info, dtr, rts);
-#endif
-
-	local_irq_save(flags);
-	if (dtr >= 0) {
-#ifdef MCFPP_DTR0
-		if (info->line)
-			mcf_setppdata(MCFPP_DTR1, (dtr ? 0 : MCFPP_DTR1));
-		else
-			mcf_setppdata(MCFPP_DTR0, (dtr ? 0 : MCFPP_DTR0));
-#endif
-	}
-	if (rts >= 0) {
-		uartp = info->addr;
-		if (rts) {
-			info->sigs |= TIOCM_RTS;
-			uartp[MCFUART_UOP1] = MCFUART_UOP_RTS;
-		} else {
-			info->sigs &= ~TIOCM_RTS;
-			uartp[MCFUART_UOP0] = MCFUART_UOP_RTS;
-		}
-	}
-	local_irq_restore(flags);
-	return;
-}
-
-/*
- *	Gets values of serial signals.
- */
-static int mcfrs_getsignals(struct mcf_serial *info)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-	int			sigs;
-#if defined(CONFIG_NETtel) && defined(CONFIG_M5307)
-	unsigned short		ppdata;
-#endif
-
-#if 0
-	printk("%s(%d): mcfrs_getsignals(info=%x)\n", __FILE__, __LINE__);
-#endif
-
-	local_irq_save(flags);
-	uartp = info->addr;
-	sigs = (uartp[MCFUART_UIPR] & MCFUART_UIPR_CTS) ? 0 : TIOCM_CTS;
-	sigs |= (info->sigs & TIOCM_RTS);
-
-#ifdef MCFPP_DCD0
-{
-	unsigned int ppdata;
-	ppdata = mcf_getppdata();
-	if (info->line == 0) {
-		sigs |= (ppdata & MCFPP_DCD0) ? 0 : TIOCM_CD;
-		sigs |= (ppdata & MCFPP_DTR0) ? 0 : TIOCM_DTR;
-	} else if (info->line == 1) {
-		sigs |= (ppdata & MCFPP_DCD1) ? 0 : TIOCM_CD;
-		sigs |= (ppdata & MCFPP_DTR1) ? 0 : TIOCM_DTR;
-	}
-}
-#endif
-
-	local_irq_restore(flags);
-	return(sigs);
-}
-
-/*
- * ------------------------------------------------------------
- * mcfrs_stop() and mcfrs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void mcfrs_stop(struct tty_struct *tty)
-{
-	volatile unsigned char	*uartp;
-	struct mcf_serial	*info = (struct mcf_serial *)tty->driver_data;
-	unsigned long		flags;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_stop"))
-		return;
-	
-	local_irq_save(flags);
-	uartp = info->addr;
-	info->imr &= ~MCFUART_UIR_TXREADY;
-	uartp[MCFUART_UIMR] = info->imr;
-	local_irq_restore(flags);
-}
-
-static void mcfrs_start(struct tty_struct *tty)
-{
-	volatile unsigned char	*uartp;
-	struct mcf_serial	*info = (struct mcf_serial *)tty->driver_data;
-	unsigned long		flags;
-	
-	if (serial_paranoia_check(info, tty->name, "mcfrs_start"))
-		return;
-
-	local_irq_save(flags);
-	if (info->xmit_cnt && info->xmit_buf) {
-		uartp = info->addr;
-		info->imr |= MCFUART_UIR_TXREADY;
-		uartp[MCFUART_UIMR] = info->imr;
-	}
-	local_irq_restore(flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines.  All of the following
- * subroutines are declared as inline and are folded into
- * mcfrs_interrupt().  They were separated out for readability's sake.
- *
- * Note: mcfrs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off.  People who may want to modify
- * mcfrs_interrupt() should try to keep the interrupt handler as fast as
- * possible.  After you are done making modifications, it is not a bad
- * idea to do:
- * 
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * 				- Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-static inline void receive_chars(struct mcf_serial *info)
-{
-	volatile unsigned char	*uartp;
-	struct tty_struct	*tty = info->port.tty;
-	unsigned char		status, ch, flag;
-
-	if (!tty)
-		return;
-
-	uartp = info->addr;
-
-	while ((status = uartp[MCFUART_USR]) & MCFUART_USR_RXREADY) {
-		ch = uartp[MCFUART_URB];
-		info->stats.rx++;
-
-#ifdef CONFIG_MAGIC_SYSRQ
-		if (mcfrs_console_inited && (info->line == mcfrs_console_port)) {
-			if (magic_sysrq_key(ch))
-				continue;
-		}
-#endif
-
-		flag = TTY_NORMAL;
-		if (status & MCFUART_USR_RXERR) {
-			uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR;
-			if (status & MCFUART_USR_RXBREAK) {
-				info->stats.rxbreak++;
-				flag = TTY_BREAK;
-			} else if (status & MCFUART_USR_RXPARITY) {
-				info->stats.rxparity++;
-				flag = TTY_PARITY;
-			} else if (status & MCFUART_USR_RXOVERRUN) {
-				info->stats.rxoverrun++;
-				flag = TTY_OVERRUN;
-			} else if (status & MCFUART_USR_RXFRAMING) {
-				info->stats.rxframing++;
-				flag = TTY_FRAME;
-			}
-		}
-		tty_insert_flip_char(tty, ch, flag);
-	}
-	tty_schedule_flip(tty);
-	return;
-}
-
-static inline void transmit_chars(struct mcf_serial *info)
-{
-	volatile unsigned char	*uartp;
-
-	uartp = info->addr;
-
-	if (info->x_char) {
-		/* Send special char - probably flow control */
-		uartp[MCFUART_UTB] = info->x_char;
-		info->x_char = 0;
-		info->stats.tx++;
-	}
-
-	if ((info->xmit_cnt <= 0) || info->port.tty->stopped) {
-		info->imr &= ~MCFUART_UIR_TXREADY;
-		uartp[MCFUART_UIMR] = info->imr;
-		return;
-	}
-
-	while (uartp[MCFUART_USR] & MCFUART_USR_TXREADY) {
-		uartp[MCFUART_UTB] = info->xmit_buf[info->xmit_tail++];
-		info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
-		info->stats.tx++;
-		if (--info->xmit_cnt <= 0)
-			break;
-	}
-
-	if (info->xmit_cnt < WAKEUP_CHARS)
-		schedule_work(&info->tqueue);
-	return;
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-irqreturn_t mcfrs_interrupt(int irq, void *dev_id)
-{
-	struct mcf_serial	*info;
-	unsigned char		isr;
-
-	info = &mcfrs_table[(irq - IRQBASE)];
-	isr = info->addr[MCFUART_UISR] & info->imr;
-
-	if (isr & MCFUART_UIR_RXREADY)
-		receive_chars(info);
-	if (isr & MCFUART_UIR_TXREADY)
-		transmit_chars(info);
-	return IRQ_HANDLED;
-}
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-static void mcfrs_offintr(struct work_struct *work)
-{
-	struct mcf_serial *info = container_of(work, struct mcf_serial, tqueue);
-	struct tty_struct *tty = info->port.tty;
-	
-	if (tty)
-		tty_wakeup(tty);
-}
-
-
-/*
- *	Change of state on a DCD line.
- */
-void mcfrs_modem_change(struct mcf_serial *info, int dcd)
-{
-	if (info->count == 0)
-		return;
-
-	if (info->flags & ASYNC_CHECK_CD) {
-		if (dcd)
-			wake_up_interruptible(&info->open_wait);
-		else 
-			schedule_work(&info->tqueue_hangup);
-	}
-}
-
-
-#ifdef MCFPP_DCD0
-
-unsigned short	mcfrs_ppstatus;
-
-/*
- * This subroutine is called when the RS_TIMER goes off. It is used
- * to monitor the state of the DCD lines - since they have no edge
- * sensors and interrupt generators.
- */
-static void mcfrs_timer(void)
-{
-	unsigned int	ppstatus, dcdval, i;
-
-	ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1);
-
-	if (ppstatus != mcfrs_ppstatus) {
-		for (i = 0; (i < 2); i++) {
-			dcdval = (i ? MCFPP_DCD1 : MCFPP_DCD0);
-			if ((ppstatus & dcdval) != (mcfrs_ppstatus & dcdval)) {
-				mcfrs_modem_change(&mcfrs_table[i],
-					((ppstatus & dcdval) ? 0 : 1));
-			}
-		}
-	}
-	mcfrs_ppstatus = ppstatus;
-
-	/* Re-arm timer */
-	mcfrs_timer_struct.expires = jiffies + HZ/25;
-	add_timer(&mcfrs_timer_struct);
-}
-
-#endif	/* MCFPP_DCD0 */
-
-
-/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred. The path of
- * hangup processing is:
- *
- * 	serial interrupt routine -> (scheduler tqueue) ->
- * 	do_serial_hangup() -> tty->hangup() -> mcfrs_hangup()
- * 
- */
-static void do_serial_hangup(struct work_struct *work)
-{
-	struct mcf_serial *info = container_of(work, struct mcf_serial, tqueue_hangup);
-	struct tty_struct *tty = info->port.tty;
-	
-	if (tty)
-		tty_hangup(tty);
-}
-
-static int startup(struct mcf_serial * info)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-	
-	if (info->flags & ASYNC_INITIALIZED)
-		return 0;
-
-	if (!info->xmit_buf) {
-		info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL);
-		if (!info->xmit_buf)
-			return -ENOMEM;
-	}
-
-	local_irq_save(flags);
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("starting up ttyS%d (irq %d)...\n", info->line, info->irq);
-#endif
-
-	/*
-	 *	Reset UART, get it into known state...
-	 */
-	uartp = info->addr;
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX;  /* reset RX */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX;  /* reset TX */
-	mcfrs_setsignals(info, 1, 1);
-
-	if (info->port.tty)
-		clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
-	/*
-	 * and set the speed of the serial port
-	 */
-	mcfrs_change_speed(info);
-
-	/*
-	 * Lastly enable the UART transmitter and receiver, and
-	 * interrupt enables.
-	 */
-	info->imr = MCFUART_UIR_RXREADY;
-	uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
-	uartp[MCFUART_UIMR] = info->imr;
-
-	info->flags |= ASYNC_INITIALIZED;
-	local_irq_restore(flags);
-	return 0;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(struct mcf_serial * info)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-
-	if (!(info->flags & ASYNC_INITIALIZED))
-		return;
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("Shutting down serial port %d (irq %d)....\n", info->line,
-	       info->irq);
-#endif
-	
-	local_irq_save(flags);
-
-	uartp = info->addr;
-	uartp[MCFUART_UIMR] = 0;  /* mask all interrupts */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX;  /* reset RX */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX;  /* reset TX */
-
-	if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
-		mcfrs_setsignals(info, 0, 0);
-
-	if (info->xmit_buf) {
-		free_page((unsigned long) info->xmit_buf);
-		info->xmit_buf = 0;
-	}
-
-	if (info->port.tty)
-		set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-	
-	info->flags &= ~ASYNC_INITIALIZED;
-	local_irq_restore(flags);
-}
-
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void mcfrs_change_speed(struct mcf_serial *info)
-{
-	volatile unsigned char	*uartp;
-	unsigned int		baudclk, cflag;
-	unsigned long		flags;
-	unsigned char		mr1, mr2;
-	int			i;
-#ifdef	CONFIG_M5272
-	unsigned int		fraction;
-#endif
-
-	if (!info->port.tty || !info->port.tty->termios)
-		return;
-	cflag = info->port.tty->termios->c_cflag;
-	if (info->addr == 0)
-		return;
-
-#if 0
-	printk("%s(%d): mcfrs_change_speed()\n", __FILE__, __LINE__);
-#endif
-
-	i = cflag & CBAUD;
-	if (i & CBAUDEX) {
-		i &= ~CBAUDEX;
-		if (i < 1 || i > 4)
-			info->port.tty->termios->c_cflag &= ~CBAUDEX;
-		else
-			i += 15;
-	}
-	if (i == 0) {
-		mcfrs_setsignals(info, 0, -1);
-		return;
-	}
-
-	/* compute the baudrate clock */
-#ifdef	CONFIG_M5272
-	/*
-	 * For the MCF5272, also compute the baudrate fraction.
-	 */
-	baudclk = (MCF_BUSCLK / mcfrs_baud_table[i]) / 32;
-	fraction = MCF_BUSCLK - (baudclk * 32 * mcfrs_baud_table[i]);
-	fraction *= 16;
-	fraction /= (32 * mcfrs_baud_table[i]);
-#else
-	baudclk = ((MCF_BUSCLK / mcfrs_baud_table[i]) + 16) / 32;
-#endif
-
-	info->baud = mcfrs_baud_table[i];
-
-	mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR;
-	mr2 = 0;
-
-	switch (cflag & CSIZE) {
-	case CS5:	mr1 |= MCFUART_MR1_CS5; break;
-	case CS6:	mr1 |= MCFUART_MR1_CS6; break;
-	case CS7:	mr1 |= MCFUART_MR1_CS7; break;
-	case CS8:
-	default:	mr1 |= MCFUART_MR1_CS8; break;
-	}
-
-	if (cflag & PARENB) {
-		if (cflag & CMSPAR) {
-			if (cflag & PARODD)
-				mr1 |= MCFUART_MR1_PARITYMARK;
-			else
-				mr1 |= MCFUART_MR1_PARITYSPACE;
-		} else {
-			if (cflag & PARODD)
-				mr1 |= MCFUART_MR1_PARITYODD;
-			else
-				mr1 |= MCFUART_MR1_PARITYEVEN;
-		}
-	} else {
-		mr1 |= MCFUART_MR1_PARITYNONE;
-	}
-
-	if (cflag & CSTOPB)
-		mr2 |= MCFUART_MR2_STOP2;
-	else
-		mr2 |= MCFUART_MR2_STOP1;
-
-	if (cflag & CRTSCTS) {
-		mr1 |= MCFUART_MR1_RXRTS;
-		mr2 |= MCFUART_MR2_TXCTS;
-	}
-
-	if (cflag & CLOCAL)
-		info->flags &= ~ASYNC_CHECK_CD;
-	else
-		info->flags |= ASYNC_CHECK_CD;
-
-	uartp = info->addr;
-
-	local_irq_save(flags);
-#if 0
-	printk("%s(%d): mr1=%x mr2=%x baudclk=%x\n", __FILE__, __LINE__,
-		mr1, mr2, baudclk);
-#endif
-	/*
-	  Note: pg 12-16 of MCF5206e User's Manual states that a
-	  software reset should be performed prior to changing
-	  UMR1,2, UCSR, UACR, bit 7
-	*/
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX;    /* reset RX */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX;    /* reset TX */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR;	/* reset MR pointer */
-	uartp[MCFUART_UMR] = mr1;
-	uartp[MCFUART_UMR] = mr2;
-	uartp[MCFUART_UBG1] = (baudclk & 0xff00) >> 8;	/* set msb byte */
-	uartp[MCFUART_UBG2] = (baudclk & 0xff);		/* set lsb byte */
-#ifdef	CONFIG_M5272
-	uartp[MCFUART_UFPD] = (fraction & 0xf);		/* set fraction */
-#endif
-	uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
-	uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
-	mcfrs_setsignals(info, 1, -1);
-	local_irq_restore(flags);
-	return;
-}
-
-static void mcfrs_flush_chars(struct tty_struct *tty)
-{
-	volatile unsigned char	*uartp;
-	struct mcf_serial	*info = (struct mcf_serial *)tty->driver_data;
-	unsigned long		flags;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_flush_chars"))
-		return;
-
-	uartp = (volatile unsigned char *) info->addr;
-
-	/*
-	 * re-enable receiver interrupt
-	 */
-	local_irq_save(flags);
-	if ((!(info->imr & MCFUART_UIR_RXREADY)) &&
-	    (info->flags & ASYNC_INITIALIZED) ) {
-		info->imr |= MCFUART_UIR_RXREADY;
-		uartp[MCFUART_UIMR] = info->imr;
-	}
-	local_irq_restore(flags);
-
-	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
-	    !info->xmit_buf)
-		return;
-
-	/* Enable transmitter */
-	local_irq_save(flags);
-	info->imr |= MCFUART_UIR_TXREADY;
-	uartp[MCFUART_UIMR] = info->imr;
-	local_irq_restore(flags);
-}
-
-static int mcfrs_write(struct tty_struct * tty,
-		    const unsigned char *buf, int count)
-{
-	volatile unsigned char	*uartp;
-	struct mcf_serial	*info = (struct mcf_serial *)tty->driver_data;
-	unsigned long		flags;
-	int			c, total = 0;
-
-#if 0
-	printk("%s(%d): mcfrs_write(tty=%x,buf=%x,count=%d)\n",
-		__FILE__, __LINE__, (int)tty, (int)buf, count);
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_write"))
-		return 0;
-
-	if (!tty || !info->xmit_buf)
-		return 0;
-	
-	local_save_flags(flags);
-	while (1) {
-		local_irq_disable();		
-		c = min(count, (int) min(((int)SERIAL_XMIT_SIZE) - info->xmit_cnt - 1,
-			((int)SERIAL_XMIT_SIZE) - info->xmit_head));
-		local_irq_restore(flags);
-
-		if (c <= 0)
-			break;
-
-		memcpy(info->xmit_buf + info->xmit_head, buf, c);
-
-		local_irq_disable();
-		info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
-		info->xmit_cnt += c;
-		local_irq_restore(flags);
-
-		buf += c;
-		count -= c;
-		total += c;
-	}
-
-	local_irq_disable();
-	uartp = info->addr;
-	info->imr |= MCFUART_UIR_TXREADY;
-	uartp[MCFUART_UIMR] = info->imr;
-	local_irq_restore(flags);
-
-	return total;
-}
-
-static int mcfrs_write_room(struct tty_struct *tty)
-{
-	struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
-	int	ret;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_write_room"))
-		return 0;
-	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
-	if (ret < 0)
-		ret = 0;
-	return ret;
-}
-
-static int mcfrs_chars_in_buffer(struct tty_struct *tty)
-{
-	struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_chars_in_buffer"))
-		return 0;
-	return info->xmit_cnt;
-}
-
-static void mcfrs_flush_buffer(struct tty_struct *tty)
-{
-	struct mcf_serial	*info = (struct mcf_serial *)tty->driver_data;
-	unsigned long		flags;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_flush_buffer"))
-		return;
-
-	local_irq_save(flags);
-	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-	local_irq_restore(flags);
-
-	tty_wakeup(tty);
-}
-
-/*
- * ------------------------------------------------------------
- * mcfrs_throttle()
- * 
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void mcfrs_throttle(struct tty_struct * tty)
-{
-	struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-	
-	printk("throttle %s: %d....\n", tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_throttle"))
-		return;
-	
-	if (I_IXOFF(tty))
-		info->x_char = STOP_CHAR(tty);
-
-	/* Turn off RTS line (do this atomic) */
-}
-
-static void mcfrs_unthrottle(struct tty_struct * tty)
-{
-	struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
-	char	buf[64];
-	
-	printk("unthrottle %s: %d....\n", tty_name(tty, buf),
-	       tty->ldisc.chars_in_buffer(tty));
-#endif
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_unthrottle"))
-		return;
-	
-	if (I_IXOFF(tty)) {
-		if (info->x_char)
-			info->x_char = 0;
-		else
-			info->x_char = START_CHAR(tty);
-	}
-
-	/* Assert RTS line (do this atomic) */
-}
-
-/*
- * ------------------------------------------------------------
- * mcfrs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct mcf_serial * info,
-			   struct serial_struct * retinfo)
-{
-	struct serial_struct tmp;
-  
-	if (!retinfo)
-		return -EFAULT;
-	memset(&tmp, 0, sizeof(tmp));
-	tmp.type = info->type;
-	tmp.line = info->line;
-	tmp.port = (unsigned int) info->addr;
-	tmp.irq = info->irq;
-	tmp.flags = info->flags;
-	tmp.baud_base = info->baud_base;
-	tmp.close_delay = info->close_delay;
-	tmp.closing_wait = info->closing_wait;
-	tmp.custom_divisor = info->custom_divisor;
-	return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 0;
-}
-
-static int set_serial_info(struct mcf_serial * info,
-			   struct serial_struct * new_info)
-{
-	struct serial_struct new_serial;
-	struct mcf_serial old_info;
-	int 	retval = 0;
-
-	if (!new_info)
-		return -EFAULT;
-	if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
-		return -EFAULT;
-	old_info = *info;
-
-	if (!capable(CAP_SYS_ADMIN)) {
-		if ((new_serial.baud_base != info->baud_base) ||
-		    (new_serial.type != info->type) ||
-		    (new_serial.close_delay != info->close_delay) ||
-		    ((new_serial.flags & ~ASYNC_USR_MASK) !=
-		     (info->flags & ~ASYNC_USR_MASK)))
-			return -EPERM;
-		info->flags = ((info->flags & ~ASYNC_USR_MASK) |
-			       (new_serial.flags & ASYNC_USR_MASK));
-		info->custom_divisor = new_serial.custom_divisor;
-		goto check_and_exit;
-	}
-
-	if (info->count > 1)
-		return -EBUSY;
-
-	/*
-	 * OK, past this point, all the error checking has been done.
-	 * At this point, we start making changes.....
-	 */
-
-	info->baud_base = new_serial.baud_base;
-	info->flags = ((info->flags & ~ASYNC_FLAGS) |
-			(new_serial.flags & ASYNC_FLAGS));
-	info->type = new_serial.type;
-	info->close_delay = new_serial.close_delay;
-	info->closing_wait = new_serial.closing_wait;
-
-check_and_exit:
-	retval = startup(info);
-	return retval;
-}
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * 	    is emptied.  On bus types like RS485, the transmitter must
- * 	    release the bus after transmitting. This must be done when
- * 	    the transmit shift register is empty, not be done when the
- * 	    transmit holding register is empty.  This functionality
- * 	    allows an RS485 driver to be written in user space. 
- */
-static int get_lsr_info(struct mcf_serial * info, unsigned int *value)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-	unsigned char		status;
-
-	local_irq_save(flags);
-	uartp = info->addr;
-	status = (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY) ? TIOCSER_TEMT : 0;
-	local_irq_restore(flags);
-
-	return put_user(status,value);
-}
-
-/*
- * This routine sends a break character out the serial port.
- */
-static void send_break(	struct mcf_serial * info, int duration)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-
-	if (!info->addr)
-		return;
-	set_current_state(TASK_INTERRUPTIBLE);
-	uartp = info->addr;
-
-	local_irq_save(flags);
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTART;
-	schedule_timeout(duration);
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDBREAKSTOP;
-	local_irq_restore(flags);
-}
-
-static int mcfrs_tiocmget(struct tty_struct *tty, struct file *file)
-{
-	struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl"))
-		return -ENODEV;
-	if (tty->flags & (1 << TTY_IO_ERROR))
-		return -EIO;
-
-	return mcfrs_getsignals(info);
-}
-
-static int mcfrs_tiocmset(struct tty_struct *tty, struct file *file,
-			  unsigned int set, unsigned int clear)
-{
-	struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
-	int rts = -1, dtr = -1;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl"))
-		return -ENODEV;
-	if (tty->flags & (1 << TTY_IO_ERROR))
-		return -EIO;
-
-	if (set & TIOCM_RTS)
-		rts = 1;
-	if (set & TIOCM_DTR)
-		dtr = 1;
-	if (clear & TIOCM_RTS)
-		rts = 0;
-	if (clear & TIOCM_DTR)
-		dtr = 0;
-
-	mcfrs_setsignals(info, dtr, rts);
-
-	return 0;
-}
-
-static int mcfrs_ioctl(struct tty_struct *tty, struct file * file,
-		    unsigned int cmd, unsigned long arg)
-{
-	struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
-	int retval, error;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_ioctl"))
-		return -ENODEV;
-
-	if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
-	    (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD)  &&
-	    (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
-		if (tty->flags & (1 << TTY_IO_ERROR))
-		    return -EIO;
-	}
-	
-	switch (cmd) {
-		case TCSBRK:	/* SVID version: non-zero arg --> no break */
-			retval = tty_check_change(tty);
-			if (retval)
-				return retval;
-			tty_wait_until_sent(tty, 0);
-			if (!arg)
-				send_break(info, HZ/4);	/* 1/4 second */
-			return 0;
-		case TCSBRKP:	/* support for POSIX tcsendbreak() */
-			retval = tty_check_change(tty);
-			if (retval)
-				return retval;
-			tty_wait_until_sent(tty, 0);
-			send_break(info, arg ? arg*(HZ/10) : HZ/4);
-			return 0;
-		case TIOCGSERIAL:
-			if (access_ok(VERIFY_WRITE, (void *) arg,
-						sizeof(struct serial_struct)))
-				return get_serial_info(info,
-					       (struct serial_struct *) arg);
-			return -EFAULT;
-		case TIOCSSERIAL:
-			return set_serial_info(info,
-					       (struct serial_struct *) arg);
-		case TIOCSERGETLSR: /* Get line status register */
-			if (access_ok(VERIFY_WRITE, (void *) arg,
-						sizeof(unsigned int)))
-				return get_lsr_info(info, (unsigned int *) arg);
-			return -EFAULT;
-		case TIOCSERGSTRUCT:
-			error = copy_to_user((struct mcf_serial *) arg,
-				    info, sizeof(struct mcf_serial));
-			if (error)
-				return -EFAULT;
-			return 0;
-			
-#ifdef TIOCSET422
-		case TIOCSET422: {
-			unsigned int val;
-			get_user(val, (unsigned int *) arg);
-			mcf_setpa(MCFPP_PA11, (val ? 0 : MCFPP_PA11));
-			break;
-		}
-		case TIOCGET422: {
-			unsigned int val;
-			val = (mcf_getpa() & MCFPP_PA11) ? 0 : 1;
-			put_user(val, (unsigned int *) arg);
-			break;
-		}
-#endif
-
-		default:
-			return -ENOIOCTLCMD;
-		}
-	return 0;
-}
-
-static void mcfrs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
-	struct mcf_serial *info = (struct mcf_serial *)tty->driver_data;
-
-	if (tty->termios->c_cflag == old_termios->c_cflag)
-		return;
-
-	mcfrs_change_speed(info);
-
-	if ((old_termios->c_cflag & CRTSCTS) &&
-	    !(tty->termios->c_cflag & CRTSCTS)) {
-		tty->hw_stopped = 0;
-		mcfrs_setsignals(info, -1, 1);
-#if 0
-		mcfrs_start(tty);
-#endif
-	}
-}
-
-/*
- * ------------------------------------------------------------
- * mcfrs_close()
- * 
- * This routine is called when the serial port gets closed.  First, we
- * wait for the last remaining data to be sent.  Then, we unlink its
- * S structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void mcfrs_close(struct tty_struct *tty, struct file * filp)
-{
-	volatile unsigned char	*uartp;
-	struct mcf_serial	*info = (struct mcf_serial *)tty->driver_data;
-	unsigned long		flags;
-
-	if (!info || serial_paranoia_check(info, tty->name, "mcfrs_close"))
-		return;
-	
-	local_irq_save(flags);
-	
-	if (tty_hung_up_p(filp)) {
-		local_irq_restore(flags);
-		return;
-	}
-	
-#ifdef SERIAL_DEBUG_OPEN
-	printk("mcfrs_close ttyS%d, count = %d\n", info->line, info->count);
-#endif
-	if ((tty->count == 1) && (info->count != 1)) {
-		/*
-		 * Uh, oh.  tty->count is 1, which means that the tty
-		 * structure will be freed.  Info->count should always
-		 * be one in these conditions.  If it's greater than
-		 * one, we've got real problems, since it means the
-		 * serial port won't be shutdown.
-		 */
-		printk("MCFRS: bad serial port count; tty->count is 1, "
-		       "info->count is %d\n", info->count);
-		info->count = 1;
-	}
-	if (--info->count < 0) {
-		printk("MCFRS: bad serial port count for ttyS%d: %d\n",
-		       info->line, info->count);
-		info->count = 0;
-	}
-	if (info->count) {
-		local_irq_restore(flags);
-		return;
-	}
-	info->flags |= ASYNC_CLOSING;
-
-	/*
-	 * Now we wait for the transmit buffer to clear; and we notify 
-	 * the line discipline to only process XON/XOFF characters.
-	 */
-	tty->closing = 1;
-	if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
-		tty_wait_until_sent(tty, info->closing_wait);
-
-	/*
-	 * At this point we stop accepting input.  To do this, we
-	 * disable the receive line status interrupts, and tell the
-	 * interrupt driver to stop checking the data ready bit in the
-	 * line status register.
-	 */
-	info->imr &= ~MCFUART_UIR_RXREADY;
-	uartp = info->addr;
-	uartp[MCFUART_UIMR] = info->imr;
-
-#if 0
-	/* FIXME: do we need to keep this enabled for console?? */
-	if (mcfrs_console_inited && (mcfrs_console_port == info->line)) {
-		/* Do not disable the UART */ ;
-	} else
-#endif
-	shutdown(info);
-	mcfrs_flush_buffer(tty);
-	tty_ldisc_flush(tty);
-	
-	tty->closing = 0;
-	info->event = 0;
-	info->port.tty = NULL;
-#if 0	
-	if (tty->ldisc.num != ldiscs[N_TTY].num) {
-		if (tty->ldisc.close)
-			(tty->ldisc.close)(tty);
-		tty->ldisc = ldiscs[N_TTY];
-		tty->termios->c_line = N_TTY;
-		if (tty->ldisc.open)
-			(tty->ldisc.open)(tty);
-	}
-#endif	
-	if (info->blocked_open) {
-		if (info->close_delay) {
-			msleep_interruptible(jiffies_to_msecs(info->close_delay));
-		}
-		wake_up_interruptible(&info->open_wait);
-	}
-	info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-	wake_up_interruptible(&info->close_wait);
-	local_irq_restore(flags);
-}
-
-/*
- * mcfrs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void
-mcfrs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-#ifdef	CONFIG_M5272
-#define	MCF5272_FIFO_SIZE	25		/* fifo size + shift reg */
-
-	struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
-	volatile unsigned char *uartp;
-	unsigned long orig_jiffies, fifo_time, char_time, fifo_cnt;
-
-	if (serial_paranoia_check(info, tty->name, "mcfrs_wait_until_sent"))
-		return;
-
-	orig_jiffies = jiffies;
-
-	/*
-	 * Set the check interval to be 1/5 of the approximate time
-	 * to send the entire fifo, and make it at least 1.  The check
-	 * interval should also be less than the timeout.
-	 *
-	 * Note: we have to use pretty tight timings here to satisfy
-	 * the NIST-PCTS.
-	 */
-	lock_kernel();
-
-	fifo_time = (MCF5272_FIFO_SIZE * HZ * 10) / info->baud;
-	char_time = fifo_time / 5;
-	if (char_time == 0)
-		char_time = 1;
-	if (timeout && timeout < char_time)
-		char_time = timeout;
-
-	/*
-	 * Clamp the timeout period at 2 * the time to empty the
-	 * fifo.  Just to be safe, set the minimum at .5 seconds.
-	 */
-	fifo_time *= 2;
-	if (fifo_time < (HZ/2))
-		fifo_time = HZ/2;
-	if (!timeout || timeout > fifo_time)
-		timeout = fifo_time;
-
-	/*
-	 * Account for the number of bytes in the UART
-	 * transmitter FIFO plus any byte being shifted out.
-	 */
-	uartp = (volatile unsigned char *) info->addr;
-	for (;;) {
-		fifo_cnt = (uartp[MCFUART_UTF] & MCFUART_UTF_TXB);
-		if ((uartp[MCFUART_USR] & (MCFUART_USR_TXREADY|
-				MCFUART_USR_TXEMPTY)) ==
-			MCFUART_USR_TXREADY)
-			fifo_cnt++;
-		if (fifo_cnt == 0)
-			break;
-		msleep_interruptible(jiffies_to_msecs(char_time));
-		if (signal_pending(current))
-			break;
-		if (timeout && time_after(jiffies, orig_jiffies + timeout))
-			break;
-	}
-	unlock_kernel();
-#else
-	/*
-	 * For the other coldfire models, assume all data has been sent
-	 */
-#endif
-}
-
-/*
- * mcfrs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-void mcfrs_hangup(struct tty_struct *tty)
-{
-	struct mcf_serial * info = (struct mcf_serial *)tty->driver_data;
-	
-	if (serial_paranoia_check(info, tty->name, "mcfrs_hangup"))
-		return;
-	
-	mcfrs_flush_buffer(tty);
-	shutdown(info);
-	info->event = 0;
-	info->count = 0;
-	info->flags &= ~ASYNC_NORMAL_ACTIVE;
-	info->port.tty = NULL;
-	wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * mcfrs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
-			   struct mcf_serial *info)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	int	retval;
-	int	do_clocal = 0;
-
-	/*
-	 * If the device is in the middle of being closed, then block
-	 * until it's done, and then try again.
-	 */
-	if (info->flags & ASYNC_CLOSING) {
-		interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
-		if (info->flags & ASYNC_HUP_NOTIFY)
-			return -EAGAIN;
-		else
-			return -ERESTARTSYS;
-#else
-		return -EAGAIN;
-#endif
-	}
-	
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if ((filp->f_flags & O_NONBLOCK) ||
-	    (tty->flags & (1 << TTY_IO_ERROR))) {
-		info->flags |= ASYNC_NORMAL_ACTIVE;
-		return 0;
-	}
-
-	if (tty->termios->c_cflag & CLOCAL)
-		do_clocal = 1;
-
-	/*
-	 * Block waiting for the carrier detect and the line to become
-	 * free (i.e., not in use by the callout).  While we are in
-	 * this loop, info->count is dropped by one, so that
-	 * mcfrs_close() knows when to free things.  We restore it upon
-	 * exit, either normal or abnormal.
-	 */
-	retval = 0;
-	add_wait_queue(&info->open_wait, &wait);
-#ifdef SERIAL_DEBUG_OPEN
-	printk("block_til_ready before block: ttyS%d, count = %d\n",
-	       info->line, info->count);
-#endif
-	info->count--;
-	info->blocked_open++;
-	while (1) {
-		local_irq_disable();
-		mcfrs_setsignals(info, 1, 1);
-		local_irq_enable();
-		current->state = TASK_INTERRUPTIBLE;
-		if (tty_hung_up_p(filp) ||
-		    !(info->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
-			if (info->flags & ASYNC_HUP_NOTIFY)
-				retval = -EAGAIN;
-			else
-				retval = -ERESTARTSYS;	
-#else
-			retval = -EAGAIN;
-#endif
-			break;
-		}
-		if (!(info->flags & ASYNC_CLOSING) &&
-		    (do_clocal || (mcfrs_getsignals(info) & TIOCM_CD)))
-			break;
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-#ifdef SERIAL_DEBUG_OPEN
-		printk("block_til_ready blocking: ttyS%d, count = %d\n",
-		       info->line, info->count);
-#endif
-		schedule();
-	}
-	current->state = TASK_RUNNING;
-	remove_wait_queue(&info->open_wait, &wait);
-	if (!tty_hung_up_p(filp))
-		info->count++;
-	info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
-	printk("block_til_ready after blocking: ttyS%d, count = %d\n",
-	       info->line, info->count);
-#endif
-	if (retval)
-		return retval;
-	info->flags |= ASYNC_NORMAL_ACTIVE;
-	return 0;
-}	
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its structure into
- * the IRQ chain.   It also performs the serial-specific
- * initialization for the tty structure.
- */
-int mcfrs_open(struct tty_struct *tty, struct file * filp)
-{
-	struct mcf_serial	*info;
-	int 			retval, line;
-
-	line = tty->index;
-	if ((line < 0) || (line >= NR_PORTS))
-		return -ENODEV;
-	info = mcfrs_table + line;
-	if (serial_paranoia_check(info, tty->name, "mcfrs_open"))
-		return -ENODEV;
-#ifdef SERIAL_DEBUG_OPEN
-	printk("mcfrs_open %s, count = %d\n", tty->name, info->count);
-#endif
-	info->count++;
-	tty->driver_data = info;
-	info->port.tty = tty;
-
-	/*
-	 * Start up serial port
-	 */
-	retval = startup(info);
-	if (retval)
-		return retval;
-
-	retval = block_til_ready(tty, filp, info);
-	if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
-		printk("mcfrs_open returning after block_til_ready with %d\n",
-		       retval);
-#endif
-		return retval;
-	}
-
-#ifdef SERIAL_DEBUG_OPEN
-	printk("mcfrs_open %s successful...\n", tty->name);
-#endif
-	return 0;
-}
-
-/*
- *	Based on the line number set up the internal interrupt stuff.
- */
-static void mcfrs_irqinit(struct mcf_serial *info)
-{
-#if defined(CONFIG_M5272)
-	volatile unsigned long	*icrp;
-	volatile unsigned long	*portp;
-	volatile unsigned char	*uartp;
-
-	uartp = info->addr;
-	icrp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_ICR2);
-
-	switch (info->line) {
-	case 0:
-		*icrp = 0xe0000000;
-		break;
-	case 1:
-		*icrp = 0x0e000000;
-		break;
-	default:
-		printk("MCFRS: don't know how to handle UART %d interrupt?\n",
-			info->line);
-		return;
-	}
-
-	/* Enable the output lines for the serial ports */
-	portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PBCNT);
-	*portp = (*portp & ~0x000000ff) | 0x00000055;
-	portp = (volatile unsigned long *) (MCF_MBAR + MCFSIM_PDCNT);
-	*portp = (*portp & ~0x000003fc) | 0x000002a8;
-#elif defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x)
-	volatile unsigned char *icrp, *uartp;
-	volatile unsigned long *imrp;
-
-	uartp = info->addr;
-
-	icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 +
-		MCFINTC_ICR0 + MCFINT_UART0 + info->line);
-	*icrp = 0x30 + info->line; /* level 6, line based priority */
-
-	imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 +
-		MCFINTC_IMRL);
-	*imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1);
-#if defined(CONFIG_M527x)
-	{
-		/*
-		 * External Pin Mask Setting & Enable External Pin for Interface
-		 * mrcbis@aliceposta.it
-        	 */
-		u16 *serpin_enable_mask;
-		serpin_enable_mask = (u16 *) (MCF_IPSBAR + MCF_GPIO_PAR_UART);
-		if (info->line == 0)
-			*serpin_enable_mask |= UART0_ENABLE_MASK;
-		else if (info->line == 1)
-			*serpin_enable_mask |= UART1_ENABLE_MASK;
-		else if (info->line == 2)
-			*serpin_enable_mask |= UART2_ENABLE_MASK;
-	}
-#endif
-#if defined(CONFIG_M528x)
-	/* make sure PUAPAR is set for UART0 and UART1 */
-	if (info->line < 2) {
-		volatile unsigned char *portp = (volatile unsigned char *) (MCF_MBAR + MCF5282_GPIO_PUAPAR);
-		*portp |= (0x03 << (info->line * 2));
-	}
-#endif
-#elif defined(CONFIG_M520x)
-	volatile unsigned char *icrp, *uartp;
-	volatile unsigned long *imrp;
-
-	uartp = info->addr;
-
-	icrp = (volatile unsigned char *) (MCF_MBAR + MCFICM_INTC0 +
-		MCFINTC_ICR0 + MCFINT_UART0 + info->line);
-	*icrp = 0x03;
-
-	imrp = (volatile unsigned long *) (MCF_MBAR + MCFICM_INTC0 +
-		MCFINTC_IMRL);
-	*imrp &= ~((1 << (info->irq - MCFINT_VECBASE)) | 1);
-	if (info->line < 2) {
-		unsigned short *uart_par;
-		uart_par = (unsigned short *)(MCF_IPSBAR + MCF_GPIO_PAR_UART);
-		if (info->line == 0)
-			*uart_par |=  MCF_GPIO_PAR_UART_PAR_UTXD0
-				  | MCF_GPIO_PAR_UART_PAR_URXD0;
-		else if (info->line == 1)
-			*uart_par |=  MCF_GPIO_PAR_UART_PAR_UTXD1
-				  | MCF_GPIO_PAR_UART_PAR_URXD1;
-		} else if (info->line == 2) {
-			unsigned char *feci2c_par;
-			feci2c_par = (unsigned char *)(MCF_IPSBAR +  MCF_GPIO_PAR_FECI2C);
-			*feci2c_par &= ~0x0F;
-			*feci2c_par |=  MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2
-				    | MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
-		}
-#elif defined(CONFIG_M532x)
-	volatile unsigned char *uartp;
-	uartp = info->addr;
-	switch (info->line) {
-	case 0:
-		MCF_INTC0_ICR26 = 0x3;
-		MCF_INTC0_CIMR = 26;
-		/* GPIO initialization */
-		MCF_GPIO_PAR_UART |= 0x000F;
-		break;
-	case 1:
-		MCF_INTC0_ICR27 = 0x3;
-		MCF_INTC0_CIMR = 27;
-		/* GPIO initialization */
-		MCF_GPIO_PAR_UART |= 0x0FF0;
-		break;
-	case 2:
-		MCF_INTC0_ICR28 = 0x3;
-		MCF_INTC0_CIMR = 28;
-		/* GPIOs also must be initalized, depends on board */
-		break;
-	}
-#else
-	volatile unsigned char	*icrp, *uartp;
-
-	switch (info->line) {
-	case 0:
-		icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART1ICR);
-		*icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 |
-			MCFSIM_ICR_PRI1;
-		mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART1);
-		break;
-	case 1:
-		icrp = (volatile unsigned char *) (MCF_MBAR + MCFSIM_UART2ICR);
-		*icrp = /*MCFSIM_ICR_AUTOVEC |*/ MCFSIM_ICR_LEVEL6 |
-			MCFSIM_ICR_PRI2;
-		mcf_setimr(mcf_getimr() & ~MCFSIM_IMR_UART2);
-		break;
-	default:
-		printk("MCFRS: don't know how to handle UART %d interrupt?\n",
-			info->line);
-		return;
-	}
-
-	uartp = info->addr;
-	uartp[MCFUART_UIVR] = info->irq;
-#endif
-
-	/* Clear mask, so no surprise interrupts. */
-	uartp[MCFUART_UIMR] = 0;
-
-	if (request_irq(info->irq, mcfrs_interrupt, IRQF_DISABLED,
-	    "ColdFire UART", NULL)) {
-		printk("MCFRS: Unable to attach ColdFire UART %d interrupt "
-			"vector=%d\n", info->line, info->irq);
-	}
-
-	return;
-}
-
-
-char *mcfrs_drivername = "ColdFire internal UART serial driver version 1.00\n";
-
-
-/*
- * Serial stats reporting...
- */
-int mcfrs_readproc(char *page, char **start, off_t off, int count,
-		         int *eof, void *data)
-{
-	struct mcf_serial	*info;
-	char			str[20];
-	int			len, sigs, i;
-
-	len = sprintf(page, mcfrs_drivername);
-	for (i = 0; (i < NR_PORTS); i++) {
-		info = &mcfrs_table[i];
-		len += sprintf((page + len), "%d: port:%x irq=%d baud:%d ",
-			i, (unsigned int) info->addr, info->irq, info->baud);
-		if (info->stats.rx || info->stats.tx)
-			len += sprintf((page + len), "tx:%d rx:%d ",
-			info->stats.tx, info->stats.rx);
-		if (info->stats.rxframing)
-			len += sprintf((page + len), "fe:%d ",
-			info->stats.rxframing);
-		if (info->stats.rxparity)
-			len += sprintf((page + len), "pe:%d ",
-			info->stats.rxparity);
-		if (info->stats.rxbreak)
-			len += sprintf((page + len), "brk:%d ",
-			info->stats.rxbreak);
-		if (info->stats.rxoverrun)
-			len += sprintf((page + len), "oe:%d ",
-			info->stats.rxoverrun);
-
-		str[0] = str[1] = 0;
-		if ((sigs = mcfrs_getsignals(info))) {
-			if (sigs & TIOCM_RTS)
-				strcat(str, "|RTS");
-			if (sigs & TIOCM_CTS)
-				strcat(str, "|CTS");
-			if (sigs & TIOCM_DTR)
-				strcat(str, "|DTR");
-			if (sigs & TIOCM_CD)
-				strcat(str, "|CD");
-		}
-
-		len += sprintf((page + len), "%s\n", &str[1]);
-	}
-
-	return(len);
-}
-
-
-/* Finally, routines used to initialize the serial driver. */
-
-static void show_serial_version(void)
-{
-	printk(mcfrs_drivername);
-}
-
-static const struct tty_operations mcfrs_ops = {
-	.open = mcfrs_open,
-	.close = mcfrs_close,
-	.write = mcfrs_write,
-	.flush_chars = mcfrs_flush_chars,
-	.write_room = mcfrs_write_room,
-	.chars_in_buffer = mcfrs_chars_in_buffer,
-	.flush_buffer = mcfrs_flush_buffer,
-	.ioctl = mcfrs_ioctl,
-	.throttle = mcfrs_throttle,
-	.unthrottle = mcfrs_unthrottle,
-	.set_termios = mcfrs_set_termios,
-	.stop = mcfrs_stop,
-	.start = mcfrs_start,
-	.hangup = mcfrs_hangup,
-	.read_proc = mcfrs_readproc,
-	.wait_until_sent = mcfrs_wait_until_sent,
- 	.tiocmget = mcfrs_tiocmget,
-	.tiocmset = mcfrs_tiocmset,
-};
-
-/* mcfrs_init inits the driver */
-static int __init
-mcfrs_init(void)
-{
-	struct mcf_serial	*info;
-	unsigned long		flags;
-	int			i;
-
-	/* Setup base handler, and timer table. */
-#ifdef MCFPP_DCD0
-	init_timer(&mcfrs_timer_struct);
-	mcfrs_timer_struct.function = mcfrs_timer;
-	mcfrs_timer_struct.data = 0;
-	mcfrs_timer_struct.expires = jiffies + HZ/25;
-	add_timer(&mcfrs_timer_struct);
-	mcfrs_ppstatus = mcf_getppdata() & (MCFPP_DCD0 | MCFPP_DCD1);
-#endif
-	mcfrs_serial_driver = alloc_tty_driver(NR_PORTS);
-	if (!mcfrs_serial_driver)
-		return -ENOMEM;
-
-	show_serial_version();
-
-	/* Initialize the tty_driver structure */
-	mcfrs_serial_driver->owner = THIS_MODULE;
-	mcfrs_serial_driver->name = "ttyS";
-	mcfrs_serial_driver->driver_name = "mcfserial";
-	mcfrs_serial_driver->major = TTY_MAJOR;
-	mcfrs_serial_driver->minor_start = 64;
-	mcfrs_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
-	mcfrs_serial_driver->subtype = SERIAL_TYPE_NORMAL;
-	mcfrs_serial_driver->init_termios = tty_std_termios;
-
-	mcfrs_serial_driver->init_termios.c_cflag =
-		mcfrs_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL;
-	mcfrs_serial_driver->flags = TTY_DRIVER_REAL_RAW;
-
-	tty_set_operations(mcfrs_serial_driver, &mcfrs_ops);
-
-	if (tty_register_driver(mcfrs_serial_driver)) {
-		printk("MCFRS: Couldn't register serial driver\n");
-		put_tty_driver(mcfrs_serial_driver);
-		return(-EBUSY);
-	}
-
-	local_irq_save(flags);
-
-	/*
-	 *	Configure all the attached serial ports.
-	 */
-	for (i = 0, info = mcfrs_table; (i < NR_PORTS); i++, info++) {
-		info->magic = SERIAL_MAGIC;
-		info->line = i;
-		info->port.tty = NULL;
-		info->custom_divisor = 16;
-		info->close_delay = 50;
-		info->closing_wait = 3000;
-		info->x_char = 0;
-		info->event = 0;
-		info->count = 0;
-		info->blocked_open = 0;
-		INIT_WORK(&info->tqueue, mcfrs_offintr);
-		INIT_WORK(&info->tqueue_hangup, do_serial_hangup);
-		init_waitqueue_head(&info->open_wait);
-		init_waitqueue_head(&info->close_wait);
-
-		info->imr = 0;
-		mcfrs_setsignals(info, 0, 0);
-		mcfrs_irqinit(info);
-
-		printk("ttyS%d at 0x%04x (irq = %d)", info->line,
-			(unsigned int) info->addr, info->irq);
-		printk(" is a builtin ColdFire UART\n");
-	}
-
-	local_irq_restore(flags);
-	return 0;
-}
-
-module_init(mcfrs_init);
-
-/****************************************************************************/
-/*                          Serial Console                                  */
-/****************************************************************************/
-
-/*
- *	Quick and dirty UART initialization, for console output.
- */
-
-void mcfrs_init_console(void)
-{
-	volatile unsigned char	*uartp;
-	unsigned int		clk;
-
-	/*
-	 *	Reset UART, get it into known state...
-	 */
-	uartp = (volatile unsigned char *) (MCF_MBAR +
-		(mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1));
-
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX;  /* reset RX */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX;  /* reset TX */
-	uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR;  /* reset MR pointer */
-
-	/*
-	 * Set port for defined baud , 8 data bits, 1 stop bit, no parity.
-	 */
-	uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
-	uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
-
-#ifdef	CONFIG_M5272
-{
-	/*
-	 * For the MCF5272, also compute the baudrate fraction.
-	 */
-	int fraction = MCF_BUSCLK - (clk * 32 * mcfrs_console_baud);
-	fraction *= 16;
-	fraction /= (32 * mcfrs_console_baud);
-	uartp[MCFUART_UFPD] = (fraction & 0xf);		/* set fraction */
-	clk = (MCF_BUSCLK / mcfrs_console_baud) / 32;
-}
-#else
-	clk = ((MCF_BUSCLK / mcfrs_console_baud) + 16) / 32; /* set baud */
-#endif
-
-	uartp[MCFUART_UBG1] = (clk & 0xff00) >> 8;  /* set msb baud */
-	uartp[MCFUART_UBG2] = (clk & 0xff);  /* set lsb baud */
-	uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
-	uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
-
-	mcfrs_console_inited++;
-	return;
-}
-
-
-/*
- *	Setup for console. Argument comes from the boot command line.
- */
-
-int mcfrs_console_setup(struct console *cp, char *arg)
-{
-	int		i, n = CONSOLE_BAUD_RATE;
-
-	if (!cp)
-		return(-1);
-
-	if (!strncmp(cp->name, "ttyS", 4))
-		mcfrs_console_port = cp->index;
-	else if (!strncmp(cp->name, "cua", 3))
-		mcfrs_console_port = cp->index;
-	else
-		return(-1);
-
-	if (arg)
-		n = simple_strtoul(arg,NULL,0);
-	for (i = 0; i < MCFRS_BAUD_TABLE_SIZE; i++)
-		if (mcfrs_baud_table[i] == n)
-			break;
-	if (i < MCFRS_BAUD_TABLE_SIZE) {
-		mcfrs_console_baud = n;
-		mcfrs_console_cbaud = 0;
-		if (i > 15) {
-			mcfrs_console_cbaud |= CBAUDEX;
-			i -= 15;
-		}
-		mcfrs_console_cbaud |= i;
-	}
-	mcfrs_init_console(); /* make sure baud rate changes */
-	return(0);
-}
-
-
-static struct tty_driver *mcfrs_console_device(struct console *c, int *index)
-{
-	*index = c->index;
-	return mcfrs_serial_driver;
-}
-
-
-/*
- *	Output a single character, using UART polled mode.
- *	This is used for console output.
- */
-
-int mcfrs_put_char(char ch)
-{
-	volatile unsigned char	*uartp;
-	unsigned long		flags;
-	int			i;
-
-	uartp = (volatile unsigned char *) (MCF_MBAR +
-		(mcfrs_console_port ? MCFUART_BASE2 : MCFUART_BASE1));
-
-	local_irq_save(flags);
-	for (i = 0; (i < 0x10000); i++) {
-		if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY)
-			break;
-	}
-	if (i < 0x10000) {
-		uartp[MCFUART_UTB] = ch;
-		for (i = 0; (i < 0x10000); i++)
-			if (uartp[MCFUART_USR] & MCFUART_USR_TXEMPTY)
-				break;
-	}
-	if (i >= 0x10000)
-		mcfrs_init_console(); /* try and get it back */
-	local_irq_restore(flags);
-
-	return 1;
-}
-
-
-/*
- * rs_console_write is registered for printk output.
- */
-
-void mcfrs_console_write(struct console *cp, const char *p, unsigned len)
-{
-	if (!mcfrs_console_inited)
-		mcfrs_init_console();
-	while (len-- > 0) {
-		if (*p == '\n')
-			mcfrs_put_char('\r');
-		mcfrs_put_char(*p++);
-	}
-}
-
-/*
- * declare our consoles
- */
-
-struct console mcfrs_console = {
-	.name		= "ttyS",
-	.write		= mcfrs_console_write,
-	.device		= mcfrs_console_device,
-	.setup		= mcfrs_console_setup,
-	.flags		= CON_PRINTBUFFER,
-	.index		= -1,
-};
-
-static int __init mcfrs_console_init(void)
-{
-	register_console(&mcfrs_console);
-	return 0;
-}
-
-console_initcall(mcfrs_console_init);
-
-/****************************************************************************/
diff --git a/drivers/serial/mcfserial.h b/drivers/serial/mcfserial.h
deleted file mode 100644
index 56420e2..0000000
--- a/drivers/serial/mcfserial.h
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * mcfserial.c -- serial driver for ColdFire internal UARTS.
- *
- * Copyright (c) 1999 Greg Ungerer <gerg@snapgear.com>
- * Copyright (c) 2000-2001 Lineo, Inc. <www.lineo.com>
- * Copyright (c) 2002 SnapGear Inc., <www.snapgear.com>
- *
- * Based on code from 68332serial.c which was:
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1998 TSHG
- * Copyright (c) 1999 Rt-Control Inc. <jeff@uclinux.org>
- */ 
-#ifndef _MCF_SERIAL_H
-#define _MCF_SERIAL_H
-
-#include <linux/serial.h>
-
-#ifdef __KERNEL__
-
-/*
- *	Define a local serial stats structure.
- */
-
-struct mcf_stats {
-	unsigned int	rx;
-	unsigned int	tx;
-	unsigned int	rxbreak;
-	unsigned int	rxframing;
-	unsigned int	rxparity;
-	unsigned int	rxoverrun;
-};
-
-
-/*
- * This is our internal structure for each serial port's state.
- * Each serial port has one of these structures associated with it.
- */
-
-struct mcf_serial {
-	int			magic;
-	volatile unsigned char	*addr;		/* UART memory address */
-	int			irq;
-	int			flags; 		/* defined in tty.h */
-	int			type; 		/* UART type */
-	struct tty_struct 	*tty;
-	unsigned char		imr;		/* Software imr register */
-	unsigned int		baud;
-	int			sigs;
-	int			custom_divisor;
-	int			x_char;	/* xon/xoff character */
-	int			baud_base;
-	int			close_delay;
-	unsigned short		closing_wait;
-	unsigned short		closing_wait2;
-	unsigned long		event;
-	int			line;
-	int			count;	    /* # of fd on device */
-	int			blocked_open; /* # of blocked opens */
-	unsigned char 		*xmit_buf;
-	int			xmit_head;
-	int			xmit_tail;
-	int			xmit_cnt;
-	struct mcf_stats	stats;
-	struct work_struct	tqueue;
-	struct work_struct	tqueue_hangup;
-	wait_queue_head_t	open_wait;
-	wait_queue_head_t	close_wait;
-
-};
-
-#endif /* __KERNEL__ */
-
-#endif /* _MCF_SERIAL_H */
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index f977c98..6bdf336 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -2051,7 +2051,8 @@
 					"transmitter\n",
 			       port->dev ? port->dev->bus_id : "",
 			       port->dev ? ": " : "",
-			       drv->dev_name, port->line);
+			       drv->dev_name,
+			       drv->tty_driver->name_base + port->line);
 
 		ops->shutdown(port);
 	}
@@ -2154,12 +2155,11 @@
 
 	switch (port->iotype) {
 	case UPIO_PORT:
-		snprintf(address, sizeof(address),
-			 "I/O 0x%x", port->iobase);
+		snprintf(address, sizeof(address), "I/O 0x%lx", port->iobase);
 		break;
 	case UPIO_HUB6:
 		snprintf(address, sizeof(address),
-			 "I/O 0x%x offset 0x%x", port->iobase, port->hub6);
+			 "I/O 0x%lx offset 0x%x", port->iobase, port->hub6);
 		break;
 	case UPIO_MEM:
 	case UPIO_MEM32:
@@ -2177,7 +2177,9 @@
 	printk(KERN_INFO "%s%s%s%d at %s (irq = %d) is a %s\n",
 	       port->dev ? port->dev->bus_id : "",
 	       port->dev ? ": " : "",
-	       drv->dev_name, port->line, address, port->irq, uart_type(port));
+	       drv->dev_name,
+	       drv->tty_driver->name_base + port->line,
+	       address, port->irq, uart_type(port));
 }
 
 static void
diff --git a/drivers/usb/serial/aircable.c b/drivers/usb/serial/aircable.c
index 79ea98c..99fb7dc 100644
--- a/drivers/usb/serial/aircable.c
+++ b/drivers/usb/serial/aircable.c
@@ -272,7 +272,7 @@
 	 * 64 bytes, to ensure I do not get throttled.
 	 * Ask USB mailing list for better aproach.
 	 */
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 
 	if (!tty) {
 		schedule_work(&priv->rx_work);
@@ -283,12 +283,13 @@
 	count = min(64, serial_buf_data_avail(priv->rx_buf));
 
 	if (count <= 0)
-		return; /* We have finished sending everything. */
+		goto out; /* We have finished sending everything. */
 
 	tty_prepare_flip_string(tty, &data, count);
 	if (!data) {
-		err("%s- kzalloc(%d) failed.", __func__, count);
-		return;
+		dev_err(&port->dev, "%s- kzalloc(%d) failed.",
+							__func__, count);
+		goto out;
 	}
 
 	serial_buf_get(priv->rx_buf, data, count);
@@ -297,7 +298,8 @@
 
 	if (serial_buf_data_avail(priv->rx_buf))
 		schedule_work(&priv->rx_work);
-
+out:		
+	tty_kref_put(tty);
 	return;
 }
 /* End of private methods */
@@ -495,7 +497,7 @@
 	usb_serial_debug_data(debug, &port->dev, __func__,
 				urb->actual_length, urb->transfer_buffer);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		if (urb->actual_length <= 2) {
 			/* This is an incomplete package */
@@ -527,6 +529,7 @@
 		}
 		aircable_read(&priv->rx_work);
 	}
+	tty_kref_put(tty);
 
 	/* Schedule the next read _if_ we are still open */
 	if (port->port.count) {
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index 2ebe06c..1913bc7 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -322,7 +322,7 @@
 	 * to look in to this before committing any code.
 	 */
 	if (priv->last_lsr & BELKIN_SA_LSR_ERR) {
-		tty = port->port.tty;
+		tty = tty_port_tty_get(&port->port);
 		/* Overrun Error */
 		if (priv->last_lsr & BELKIN_SA_LSR_OE) {
 		}
@@ -335,6 +335,7 @@
 		/* Break Indicator */
 		if (priv->last_lsr & BELKIN_SA_LSR_BI) {
 		}
+		tty_kref_put(tty);
 	}
 #endif
 	spin_unlock_irqrestore(&priv->lock, flags);
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index e980766..5b20de1 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -117,7 +117,7 @@
 	}
 
 	port = serial->port[0];
-	port->port.tty = NULL;
+	tty_port_tty_set(&port->port, NULL);
 
 	info->port = port;
 
@@ -143,7 +143,7 @@
 			}
 			memset(&dummy, 0, sizeof(struct ktermios));
 			tty->termios = termios;
-			port->port.tty = tty;
+			tty_port_tty_set(&port->port, tty);
 		}
 
 		/* only call the device specific open if this
@@ -163,7 +163,7 @@
 			tty_termios_encode_baud_rate(termios, baud, baud);
 			serial->type->set_termios(tty, port, &dummy);
 
-			port->port.tty = NULL;
+			tty_port_tty_set(&port->port, NULL);
 			kfree(termios);
 			kfree(tty);
 		}
@@ -176,7 +176,7 @@
 	return retval;
 free_termios:
 	kfree(termios);
-	port->port.tty = NULL;
+	tty_port_tty_set(&port->port, NULL);
 free_tty:
 	kfree(tty);
 reset_open_count:
diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
index b4d7235..94ef36c 100644
--- a/drivers/usb/serial/cyberjack.c
+++ b/drivers/usb/serial/cyberjack.c
@@ -384,7 +384,7 @@
 		return;
 	}
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (!tty) {
 		dbg("%s - ignoring since device not open\n", __func__);
 		return;
@@ -394,6 +394,7 @@
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	spin_lock(&priv->lock);
 
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 22837a3..f3514a9 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -1286,7 +1286,7 @@
 	}
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (!tty) {
 		dbg("%s - bad tty pointer - exiting", __func__);
 		return;
@@ -1362,7 +1362,7 @@
 					data[i]);
 			tty_insert_flip_char(tty, data[i], tty_flag);
 		}
-		tty_flip_buffer_push(port->port.tty);
+		tty_flip_buffer_push(tty);
 	}
 
 	spin_lock_irqsave(&priv->lock, flags);
@@ -1371,6 +1371,7 @@
 	spin_unlock_irqrestore(&priv->lock, flags);
 
 continue_read:
+	tty_kref_put(tty);
 
 	/* Continue trying to always read... unless the port has closed. */
 
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index 240aad1..5756ac6 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -604,7 +604,9 @@
 
 static void digi_wakeup_write(struct usb_serial_port *port)
 {
-	tty_wakeup(port->port.tty);
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
+	tty_wakeup(tty);
+	tty_kref_put(tty);
 }
 
 
@@ -1668,7 +1670,7 @@
 {
 
 	struct usb_serial_port *port = urb->context;
-	struct tty_struct *tty = port->port.tty;
+	struct tty_struct *tty;
 	struct digi_port *priv = usb_get_serial_port_data(port);
 	int opcode = ((unsigned char *)urb->transfer_buffer)[0];
 	int len = ((unsigned char *)urb->transfer_buffer)[1];
@@ -1692,6 +1694,7 @@
 		return -1;
 	}
 
+	tty = tty_port_tty_get(&port->port);
 	spin_lock(&priv->dp_port_lock);
 
 	/* check for throttle; if set, do not resubmit read urb */
@@ -1735,6 +1738,7 @@
 		}
 	}
 	spin_unlock(&priv->dp_port_lock);
+	tty_kref_put(tty);
 
 	if (opcode == DIGI_CMD_RECEIVE_DISABLE)
 		dbg("%s: got RECEIVE_DISABLE", __func__);
@@ -1760,6 +1764,7 @@
 
 	struct usb_serial_port *port = urb->context;
 	struct usb_serial *serial = port->serial;
+	struct tty_struct *tty;
 	struct digi_port *priv = usb_get_serial_port_data(port);
 	int opcode, line, status, val;
 	int i;
@@ -1787,10 +1792,11 @@
 		if (priv == NULL)
 			return -1;
 
+		tty = tty_port_tty_get(&port->port);
 		rts = 0;
 		if (port->port.count)
-			rts = port->port.tty->termios->c_cflag & CRTSCTS;
-
+			rts = tty->termios->c_cflag & CRTSCTS;
+		
 		if (opcode == DIGI_CMD_READ_INPUT_SIGNALS) {
 			spin_lock(&priv->dp_port_lock);
 			/* convert from digi flags to termiox flags */
@@ -1798,14 +1804,14 @@
 				priv->dp_modem_signals |= TIOCM_CTS;
 				/* port must be open to use tty struct */
 				if (rts) {
-					port->port.tty->hw_stopped = 0;
+					tty->hw_stopped = 0;
 					digi_wakeup_write(port);
 				}
 			} else {
 				priv->dp_modem_signals &= ~TIOCM_CTS;
 				/* port must be open to use tty struct */
 				if (rts)
-					port->port.tty->hw_stopped = 1;
+					tty->hw_stopped = 1;
 			}
 			if (val & DIGI_READ_INPUT_SIGNALS_DSR)
 				priv->dp_modem_signals |= TIOCM_DSR;
@@ -1830,6 +1836,7 @@
 		} else if (opcode == DIGI_CMD_IFLUSH_FIFO) {
 			wake_up_interruptible(&priv->dp_flush_wait);
 		}
+		tty_kref_put(tty);
 	}
 	return 0;
 
diff --git a/drivers/usb/serial/empeg.c b/drivers/usb/serial/empeg.c
index a6ab5b5..1072e84 100644
--- a/drivers/usb/serial/empeg.c
+++ b/drivers/usb/serial/empeg.c
@@ -33,9 +33,8 @@
  *	Moved MOD_DEC_USE_COUNT to end of empeg_close().
  *
  * (12/03/2000) gb
- *	Added port->port.tty->ldisc.set_termios(port->port.tty, NULL) to
- *	empeg_open(). This notifies the tty driver that the termios have
- *	changed.
+ *	Added tty->ldisc.set_termios(port, tty, NULL) to empeg_open().
+ *	This notifies the tty driver that the termios have changed.
  *
  * (11/13/2000) gb
  *	Moved tty->low_latency = 1 from empeg_read_bulk_callback() to
@@ -354,7 +353,7 @@
 
 	usb_serial_debug_data(debug, &port->dev, __func__,
 						urb->actual_length, data);
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 
 	if (urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length);
@@ -362,6 +361,7 @@
 		tty_flip_buffer_push(tty);
 		bytes_in += urb->actual_length;
 	}
+	tty_kref_put(tty);
 
 	/* Continue trying to always read  */
 	usb_fill_bulk_urb(
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 3dc93b5..c2ac129 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -860,7 +860,7 @@
 
 	kfree(buf);
 	if (rv < 0) {
-		err("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
+		dbg("%s Error from MODEM_CTRL urb: DTR %s, RTS %s",
 				__func__,
 				(set & TIOCM_DTR) ? "HIGH" :
 				(clear & TIOCM_DTR) ? "LOW" : "unchanged",
@@ -1808,7 +1808,7 @@
 	if (port->port.count <= 0)
 		return;
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (!tty) {
 		dbg("%s - bad tty pointer - exiting", __func__);
 		return;
@@ -1817,7 +1817,7 @@
 	priv = usb_get_serial_port_data(port);
 	if (!priv) {
 		dbg("%s - bad port private data pointer - exiting", __func__);
-		return;
+		goto out;
 	}
 
 	if (urb != port->read_urb)
@@ -1827,7 +1827,7 @@
 		/* This will happen at close every time so it is a dbg not an
 		   err */
 		dbg("(this is ok on close) nonzero read bulk status received: %d", status);
-		return;
+		goto out;
 	}
 
 	/* count data bytes, but not status bytes */
@@ -1838,7 +1838,8 @@
 	spin_unlock_irqrestore(&priv->rx_lock, flags);
 
 	ftdi_process_read(&priv->rx_work.work);
-
+out:
+	tty_kref_put(tty);
 } /* ftdi_read_bulk_callback */
 
 
@@ -1863,7 +1864,7 @@
 	if (port->port.count <= 0)
 		return;
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (!tty) {
 		dbg("%s - bad tty pointer - exiting", __func__);
 		return;
@@ -1872,13 +1873,13 @@
 	priv = usb_get_serial_port_data(port);
 	if (!priv) {
 		dbg("%s - bad port private data pointer - exiting", __func__);
-		return;
+		goto out;
 	}
 
 	urb = port->read_urb;
 	if (!urb) {
 		dbg("%s - bad read_urb pointer - exiting", __func__);
-		return;
+		goto out;
 	}
 
 	data = urb->transfer_buffer;
@@ -2020,7 +2021,7 @@
 			schedule_delayed_work(&priv->rx_work, 1);
 		else
 			dbg("%s - port is closed", __func__);
-		return;
+		goto out;
 	}
 
 	/* urb is completely processed */
@@ -2041,6 +2042,8 @@
 			err("%s - failed resubmitting read urb, error %d",
 							__func__, result);
 	}
+out:
+	tty_kref_put(tty);
 } /* ftdi_process_read */
 
 
@@ -2256,7 +2259,7 @@
 			   0, 0,
 			   buf, 1, WDR_TIMEOUT);
 		if (ret < 0) {
-			err("%s Could not get modem status of device - err: %d", __func__,
+			dbg("%s Could not get modem status of device - err: %d", __func__,
 			    ret);
 			return ret;
 		}
@@ -2275,7 +2278,7 @@
 				   0, priv->interface,
 				   buf, 2, WDR_TIMEOUT);
 		if (ret < 0) {
-			err("%s Could not get modem status of device - err: %d", __func__,
+			dbg("%s Could not get modem status of device - err: %d", __func__,
 			    ret);
 			return ret;
 		}
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index d953820..2ad0569 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -276,7 +276,7 @@
 static void send_to_tty(struct usb_serial_port *port,
 			char *data, unsigned int actual_length)
 {
-	struct tty_struct *tty = port->port.tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
 
 	if (tty && actual_length) {
 
@@ -287,6 +287,7 @@
 		tty_insert_flip_string(tty, data, actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 }
 
 
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index fe84c88..814909f 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -330,7 +330,7 @@
 static void flush_and_resubmit_read_urb(struct usb_serial_port *port)
 {
 	struct urb *urb = port->read_urb;
-	struct tty_struct *tty = port->port.tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
 	int room;
 
 	/* Push data to tty */
@@ -341,6 +341,7 @@
 			tty_flip_buffer_push(tty);
 		}
 	}
+	tty_kref_put(tty);
 
 	resubmit_read_urb(port, GFP_ATOMIC);
 }
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index bfa508d..611f97f 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -600,6 +600,7 @@
 	struct edgeport_serial	*edge_serial = urb->context;
 	struct edgeport_port *edge_port;
 	struct usb_serial_port *port;
+	struct tty_struct *tty;
 	unsigned char *data = urb->transfer_buffer;
 	int length = urb->actual_length;
 	int bytes_avail;
@@ -675,9 +676,12 @@
 
 					/* tell the tty driver that something
 					   has changed */
-					if (edge_port->port->port.tty)
-						tty_wakeup(edge_port->port->port.tty);
-
+					tty = tty_port_tty_get(
+						&edge_port->port->port);
+					if (tty) {
+						tty_wakeup(tty);
+						tty_kref_put(tty);
+					}
 					/* Since we have more credit, check
 					   if more data can be sent */
 					send_more_port_data(edge_serial,
@@ -778,13 +782,14 @@
 		    __func__, status);
 	}
 
-	tty = edge_port->port->port.tty;
+	tty = tty_port_tty_get(&edge_port->port->port);
 
 	if (tty && edge_port->open) {
 		/* let the tty driver wakeup if it has a special
 		   write_wakeup function */
 		tty_wakeup(tty);
 	}
+	tty_kref_put(tty);
 
 	/* Release the Write URB */
 	edge_port->write_in_progress = false;
@@ -826,11 +831,12 @@
 	}
 
 	/* Get pointer to tty */
-	tty = edge_port->port->port.tty;
+	tty = tty_port_tty_get(&edge_port->port->port);
 
 	/* tell the tty driver that something has changed */
 	if (tty && edge_port->open)
 		tty_wakeup(tty);
+	tty_kref_put(tty);
 
 	/* we have completed the command */
 	edge_port->commandPending = false;
@@ -1932,11 +1938,13 @@
 							edge_serial->rxPort];
 				edge_port = usb_get_serial_port_data(port);
 				if (edge_port->open) {
-					tty = edge_port->port->port.tty;
+					tty = tty_port_tty_get(
+						&edge_port->port->port);
 					if (tty) {
 						dbg("%s - Sending %d bytes to TTY for port %d",
 							__func__, rxLen, edge_serial->rxPort);
 						edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
+						tty_kref_put(tty);
 					}
 					edge_port->icount.rx += rxLen;
 				}
@@ -1971,6 +1979,7 @@
 {
 	struct usb_serial_port *port;
 	struct edgeport_port *edge_port;
+	struct tty_struct *tty;
 	__u8 code = edge_serial->rxStatusCode;
 
 	/* switch the port pointer to the one being currently talked about */
@@ -2020,10 +2029,12 @@
 
 		/* send the current line settings to the port so we are
 		   in sync with any further termios calls */
-		/* FIXME: locking on tty */
-		if (edge_port->port->port.tty)
-			change_port_settings(edge_port->port->port.tty,
-				edge_port, edge_port->port->port.tty->termios);
+		tty = tty_port_tty_get(&edge_port->port->port);
+		if (tty) {
+			change_port_settings(tty,
+				edge_port, tty->termios);
+			tty_kref_put(tty);
+		}
 
 		/* we have completed the open */
 		edge_port->openPending = false;
@@ -2163,10 +2174,14 @@
 	}
 
 	/* Place LSR data byte into Rx buffer */
-	if (lsrData && edge_port->port->port.tty)
-		edge_tty_recv(&edge_port->port->dev,
-					edge_port->port->port.tty, &data, 1);
-
+	if (lsrData) {
+		struct tty_struct *tty =
+				tty_port_tty_get(&edge_port->port->port);
+		if (tty) {
+			edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
+			tty_kref_put(tty);
+		}
+	}
 	/* update input line counters */
 	icount = &edge_port->icount;
 	if (newLsr & LSR_BREAK)
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index cb4c543..541dd8e 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -572,7 +572,7 @@
 								int flush)
 {
 	int baud_rate;
-	struct tty_struct *tty = port->port->port.tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port->port);
 	wait_queue_t wait;
 	unsigned long flags;
 
@@ -599,6 +599,7 @@
 	if (flush)
 		edge_buf_clear(port->ep_out_buf);
 	spin_unlock_irqrestore(&port->ep_lock, flags);
+	tty_kref_put(tty);
 
 	/* wait for data to drain from the device */
 	timeout += jiffies;
@@ -1554,7 +1555,7 @@
 	/* Save the new modem status */
 	edge_port->shadow_msr = msr & 0xf0;
 
-	tty = edge_port->port->port.tty;
+	tty = tty_port_tty_get(&edge_port->port->port);
 	/* handle CTS flow control */
 	if (tty && C_CRTSCTS(tty)) {
 		if (msr & EDGEPORT_MSR_CTS) {
@@ -1564,6 +1565,7 @@
 			tty->hw_stopped = 1;
 		}
 	}
+	tty_kref_put(tty);
 
 	return;
 }
@@ -1574,6 +1576,7 @@
 	struct async_icount *icount;
 	__u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
 						LSR_FRM_ERR | LSR_BREAK));
+	struct tty_struct *tty;
 
 	dbg("%s - %02x", __func__, new_lsr);
 
@@ -1587,8 +1590,13 @@
 		new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
 
 	/* Place LSR data byte into Rx buffer */
-	if (lsr_data && edge_port->port->port.tty)
-		edge_tty_recv(&edge_port->port->dev, edge_port->port->port.tty, &data, 1);
+	if (lsr_data) {
+		tty = tty_port_tty_get(&edge_port->port->port);
+		if (tty) {
+			edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
+			tty_kref_put(tty);
+		}
+	}
 
 	/* update input line counters */
 	icount = &edge_port->icount;
@@ -1749,7 +1757,7 @@
 		++data;
 	}
 
-	tty = edge_port->port->port.tty;
+	tty = tty_port_tty_get(&edge_port->port->port);
 	if (tty && urb->actual_length) {
 		usb_serial_debug_data(debug, &edge_port->port->dev,
 					__func__, urb->actual_length, data);
@@ -1761,6 +1769,7 @@
 							urb->actual_length);
 		edge_port->icount.rx += urb->actual_length;
 	}
+	tty_kref_put(tty);
 
 exit:
 	/* continue read unless stopped */
@@ -1796,6 +1805,7 @@
 	struct usb_serial_port *port = urb->context;
 	struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 	int status = urb->status;
+	struct tty_struct *tty;
 
 	dbg("%s - port %d", __func__, port->number);
 
@@ -1818,7 +1828,9 @@
 	}
 
 	/* send any buffered data */
-	edge_send(port->port.tty);
+	tty = tty_port_tty_get(&port->port);
+	edge_send(tty);
+	tty_kref_put(tty);
 }
 
 static int edge_open(struct tty_struct *tty,
@@ -1876,7 +1888,7 @@
 
 	/* set up the port settings */
 	if (tty)
-		edge_set_termios(tty, port, port->port.tty->termios);
+		edge_set_termios(tty, port, tty->termios);
 
 	/* open up the port */
 
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index cd9a2e13..2affa9c 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -764,13 +764,14 @@
 	usb_serial_debug_data(debug, &port->dev, __func__,
 						urb->actual_length, data);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length);
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 		bytes_in += urb->actual_length;
 	}
+	tty_kref_put(tty);
 
 	/* Continue trying to always read  */
 	usb_fill_bulk_urb(port->read_urb, port->serial->dev,
diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
index a842025..480cac2 100644
--- a/drivers/usb/serial/ipw.c
+++ b/drivers/usb/serial/ipw.c
@@ -170,12 +170,13 @@
 	usb_serial_debug_data(debug, &port->dev, __func__,
 					urb->actual_length, data);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length);
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	/* Continue trying to always read  */
 	usb_fill_bulk_urb(port->read_urb, port->serial->dev,
diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
index e59155c..45d4043 100644
--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -465,11 +465,12 @@
 			ir_baud = *data & 0x0f;
 		usb_serial_debug_data(debug, &port->dev, __func__,
 						urb->actual_length, data);
- 		tty = port->port.tty;
+		tty = tty_port_tty_get(&port->port);
 		if (tty_buffer_request_room(tty, urb->actual_length - 1)) {
 			tty_insert_flip_string(tty, data+1, urb->actual_length - 1);
 			tty_flip_buffer_push(tty);
 		}
+		tty_kref_put(tty);
 
 		/*
 		 * No break here.
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index ddff37f..53710aa 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -629,13 +629,14 @@
 	}
 
 	dbg("%s - %i chars to write", __func__, urb->actual_length);
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (data == NULL)
 		dbg("%s - data is NULL !!!", __func__);
 	if (tty && urb->actual_length && data) {
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 	iuu_led_activity_on(urb);
 }
 
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 704716f..15447af 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -430,7 +430,7 @@
 	}
 
 	port =  urb->context;
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		/* 0x80 bit is error flag */
 		if ((data[0] & 0x80) == 0) {
@@ -459,6 +459,7 @@
 		}
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	/* Resubmit urb so we continue receiving */
 	urb->dev = port->serial->dev;
@@ -513,6 +514,7 @@
 	struct usb_serial			*serial;
 	struct usb_serial_port			*port;
 	struct keyspan_port_private	 	*p_priv;
+	struct tty_struct			*tty;
 	int old_dcd_state, err;
 	int status = urb->status;
 
@@ -553,12 +555,11 @@
 	p_priv->dcd_state = ((msg->gpia_dcd) ? 1 : 0);
 	p_priv->ri_state = ((msg->ri) ? 1 : 0);
 
-	if (port->port.tty && !C_CLOCAL(port->port.tty)
-	    && old_dcd_state != p_priv->dcd_state) {
-		if (old_dcd_state)
-			tty_hangup(port->port.tty);
-		/*  else */
-		/*	wake_up_interruptible(&p_priv->open_wait); */
+	if (old_dcd_state != p_priv->dcd_state) {
+		tty = tty_port_tty_get(&port->port);
+		if (tty && !C_CLOCAL(tty))
+			tty_hangup(tty);
+		tty_kref_put(tty);
 	}
 
 	/* Resubmit urb so we continue receiving */
@@ -604,11 +605,12 @@
 		p_priv = usb_get_serial_port_data(port);
 		data = urb->transfer_buffer;
 
-		tty = port->port.tty;
-		if (urb->actual_length) {
+		tty =tty_port_tty_get(&port->port);
+		if (tty && urb->actual_length) {
 			tty_insert_flip_string(tty, data, urb->actual_length);
 			tty_flip_buffer_push(tty);
 		}
+		tty_kref_put(tty);
 
 		/* Resubmit urb so we continue receiving */
 		urb->dev = port->serial->dev;
@@ -652,6 +654,7 @@
 	struct usb_serial			*serial;
 	struct usb_serial_port			*port;
 	struct keyspan_port_private	 	*p_priv;
+	struct tty_struct			*tty;
 	int old_dcd_state;
 	int status = urb->status;
 
@@ -689,12 +692,11 @@
 	p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
 	p_priv->ri_state = ((msg->ri) ? 1 : 0);
 
-	if (port->port.tty && !C_CLOCAL(port->port.tty)
-	    && old_dcd_state != p_priv->dcd_state) {
-		if (old_dcd_state)
-			tty_hangup(port->port.tty);
-		/*  else */
-		/*	wake_up_interruptible(&p_priv->open_wait); */
+	if( old_dcd_state != p_priv->dcd_state && old_dcd_state) {
+		tty = tty_port_tty_get(&port->port);
+		if (tty && !C_CLOCAL(tty)) 
+			tty_hangup(tty);
+		tty_kref_put(tty);
 	}
 
 		/* Resubmit urb so we continue receiving */
@@ -785,12 +787,11 @@
 	p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
 	p_priv->ri_state = ((msg->ri) ? 1 : 0);
 
-	if (port->port.tty && !C_CLOCAL(port->port.tty)
-	    && old_dcd_state != p_priv->dcd_state) {
-		if (old_dcd_state)
-			tty_hangup(port->port.tty);
-		/*  else */
-		/*	wake_up_interruptible(&p_priv->open_wait); */
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
+		struct tty_struct *tty = tty_port_tty_get(&port->port);
+		if (tty && !C_CLOCAL(tty))
+			tty_hangup(tty);
+		tty_kref_put(tty);
 	}
 
 	/* Resubmit urb so we continue receiving */
@@ -827,7 +828,7 @@
 	}
 
 	port =  urb->context;
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		/* 0x80 bit is error flag */
 		if ((data[0] & 0x80) == 0) {
@@ -850,6 +851,7 @@
 		}
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	/* Resubmit urb so we continue receiving */
 	urb->dev = port->serial->dev;
@@ -893,7 +895,7 @@
 				return;
 			}
 			port = serial->port[data[i++]];
-			tty = port->port.tty;
+			tty = tty_port_tty_get(&port->port);
 			len = data[i++];
 
 			/* 0x80 bit is error flag */
@@ -927,6 +929,7 @@
 			}
 			if (port->port.count)
 				tty_flip_buffer_push(tty);
+			tty_kref_put(tty);
 		}
 	}
 
@@ -967,8 +970,8 @@
 	port =  urb->context;
 	p_priv = usb_get_serial_port_data(port);
 
-	tty = port->port.tty;
 	if (urb->actual_length) {
+		tty = tty_port_tty_get(&port->port);
 		/* if current mode is DMA, looks like usa28 format
 		   otherwise looks like usa26 data format */
 
@@ -1004,6 +1007,7 @@
 			}
 		}
 		tty_flip_buffer_push(tty);
+		tty_kref_put(tty);
 	}
 
 	/* Resubmit urb so we continue receiving */
@@ -1025,6 +1029,7 @@
 	struct usb_serial			*serial;
 	struct usb_serial_port			*port;
 	struct keyspan_port_private	 	*p_priv;
+	struct tty_struct			*tty;
 	int old_dcd_state, err;
 	int status = urb->status;
 
@@ -1053,12 +1058,11 @@
 	p_priv->dcd_state = ((msg->dcd) ? 1 : 0);
 	p_priv->ri_state = ((msg->ri) ? 1 : 0);
 
-	if (port->port.tty && !C_CLOCAL(port->port.tty)
-	    && old_dcd_state != p_priv->dcd_state) {
-		if (old_dcd_state)
-			tty_hangup(port->port.tty);
-		/*  else */
-		/*	wake_up_interruptible(&p_priv->open_wait); */
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
+		tty = tty_port_tty_get(&port->port);
+		if (tty && !C_CLOCAL(tty))
+			tty_hangup(tty);
+		tty_kref_put(tty);
 	}
 
 	/* Resubmit urb so we continue receiving */
@@ -1130,12 +1134,11 @@
 	p_priv->cts_state = ((msg->hskia_cts) ? 1 : 0);
 	p_priv->dcd_state = ((msg->gpia_dcd) ? 1 : 0);
 
-	if (port->port.tty && !C_CLOCAL(port->port.tty)
-	    && old_dcd_state != p_priv->dcd_state) {
-		if (old_dcd_state)
-			tty_hangup(port->port.tty);
-		/*  else */
-		/*	wake_up_interruptible(&p_priv->open_wait); */
+	if (old_dcd_state != p_priv->dcd_state && old_dcd_state) {
+		struct tty_struct *tty = tty_port_tty_get(&port->port);
+		if (tty && !C_CLOCAL(tty))
+			tty_hangup(tty);
+		tty_kref_put(tty);
 	}
 
 	/* Resubmit urb so we continue receiving */
@@ -1332,7 +1335,7 @@
 			stop_urb(p_priv->out_urbs[i]);
 		}
 	}
-	port->port.tty = NULL;
+	tty_port_tty_set(&port->port, NULL);
 }
 
 /* download the firmware to a pre-renumeration device */
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 040040a..99e9a14 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -172,8 +172,9 @@
 	struct keyspan_pda_private *priv =
 		container_of(work, struct keyspan_pda_private, wakeup_work);
 	struct usb_serial_port *port = priv->port;
-
-	tty_wakeup(port->port.tty);
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
+	tty_wakeup(tty);
+	tty_kref_put(tty);
 }
 
 static void keyspan_pda_request_unthrottle(struct work_struct *work)
@@ -205,7 +206,7 @@
 static void keyspan_pda_rx_interrupt(struct urb *urb)
 {
 	struct usb_serial_port *port = urb->context;
-	struct tty_struct *tty = port->port.tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
 	unsigned char *data = urb->transfer_buffer;
 	int retval;
 	int status = urb->status;
@@ -222,7 +223,7 @@
 		/* this urb is terminated, clean up */
 		dbg("%s - urb shutting down with status: %d",
 		    __func__, status);
-		return;
+		goto out;
 	default:
 		dbg("%s - nonzero urb status received: %d",
 		    __func__, status);
@@ -261,8 +262,11 @@
 exit:
 	retval = usb_submit_urb(urb, GFP_ATOMIC);
 	if (retval)
-		err("%s - usb_submit_urb failed with result %d",
-		     __func__, retval);
+		dev_err(&port->dev,
+			"%s - usb_submit_urb failed with result %d",
+			__func__, retval);
+out:
+	tty_kref_put(tty);		     
 }
 
 
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index b84dddc..ff3a07f 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -658,7 +658,7 @@
 	} else {
 		int bytes_sent = ((__u8 *) data)[0] +
 				 ((unsigned int) ((__u8 *) data)[1] << 8);
-		tty = port->port.tty;
+		tty = tty_port_tty_get(&port->port);
 		/* we should immediately resubmit the URB, before attempting
 		 * to pass the data on to the tty layer. But that needs locking
 		 * against re-entry an then mixed-up data because of
@@ -679,6 +679,7 @@
 		tty_buffer_request_room(tty, bytes_sent);
 		tty_insert_flip_string(tty, data + 2, bytes_sent);
 		tty_flip_buffer_push(tty);
+		tty_kref_put(tty);
 
 		/* again lockless, but debug info only */
 		priv->bytes_in += bytes_sent;
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index deba28ec..cfcf37c 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -383,7 +383,7 @@
 		return;
 	}
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (urb->actual_length) {
 
 		/* BEGIN DEBUG */
@@ -405,6 +405,7 @@
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 	/* someone sets the dev to 0 if the close method has been called */
 	port->interrupt_in_urb->dev = port->serial->dev;
 
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index 0ded8bd..9b2cef8 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -563,10 +563,11 @@
 	 * Work-a-round: handle the 'usual' bulk-in pipe here
 	 */
 	if (urb->transfer_buffer_length > 2) {
-		tty = port->port.tty;
+		tty = tty_port_tty_get(&port->port);
 		if (urb->actual_length) {
 			tty_insert_flip_string(tty, data, urb->actual_length);
 			tty_flip_buffer_push(tty);
+			tty_kref_put(tty);
 		}
 		goto exit;
 	}
@@ -591,7 +592,7 @@
 	 * to look in to this before committing any code.
 	 */
 	if (priv->last_lsr & MCT_U232_LSR_ERR) {
-		tty = port->port.tty;
+		tty = tty_port_tty_get(&port->port);
 		/* Overrun Error */
 		if (priv->last_lsr & MCT_U232_LSR_OE) {
 		}
@@ -604,6 +605,7 @@
 		/* Break Indicator */
 		if (priv->last_lsr & MCT_U232_LSR_BI) {
 		}
+		tty_kref_put(tty);
 	}
 #endif
 	spin_unlock_irqrestore(&priv->lock, flags);
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 7c4917d..7b538ca 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -216,12 +216,13 @@
 
 	data = urb->transfer_buffer;
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length);
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	if (!port->read_urb) {
 		dbg("URB KILLED !!!");
@@ -262,10 +263,11 @@
 
 	dbg("Entering .........");
 
-	tty = mos7720_port->port->port.tty;
+	tty = tty_port_tty_get(&mos7720_port->port->port);
 
 	if (tty && mos7720_port->open)
 		tty_wakeup(tty);
+	tty_kref_put(tty);
 }
 
 /*
@@ -1267,29 +1269,6 @@
 	return 0;
 }
 
-/*
- * get_number_bytes_avail - get number of bytes available
- *
- * Purpose: Let user call ioctl to get the count of number of bytes available.
- */
-static int get_number_bytes_avail(struct moschip_port *mos7720_port,
-				  unsigned int __user *value)
-{
-	unsigned int result = 0;
-	struct tty_struct *tty = mos7720_port->port->port.tty;
-
-	if (!tty)
-		return -ENOIOCTLCMD;
-
-	result = tty->read_cnt;
-
-	dbg("%s(%d) = %d", __func__,  mos7720_port->port->number, result);
-	if (copy_to_user(value, &result, sizeof(int)))
-		return -EFAULT;
-
-	return -ENOIOCTLCMD;
-}
-
 static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
 			  unsigned int __user *value)
 {
@@ -1409,13 +1388,6 @@
 	dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
 
 	switch (cmd) {
-	case TIOCINQ:
-		/* return number of bytes available */
-		dbg("%s (%d) TIOCINQ", __func__,  port->number);
-		return get_number_bytes_avail(mos7720_port,
-					      (unsigned int __user *)arg);
-		break;
-
 	case TIOCSERGETLSR:
 		dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
 		return get_lsr_info(tty, mos7720_port,
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 09d8206..60543d7 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -709,12 +709,13 @@
 	dbg("%s", "Entering ........... \n");
 
 	if (urb->actual_length) {
-		tty = mos7840_port->port->port.tty;
+		tty = tty_port_tty_get(&mos7840_port->port->port);
 		if (tty) {
 			tty_buffer_request_room(tty, urb->actual_length);
 			tty_insert_flip_string(tty, data, urb->actual_length);
 			dbg(" %s \n", data);
 			tty_flip_buffer_push(tty);
+			tty_kref_put(tty);
 		}
 		mos7840_port->icount.rx += urb->actual_length;
 		smp_wmb();
@@ -773,10 +774,10 @@
 
 	dbg("%s \n", "Entering .........");
 
-	tty = mos7840_port->port->port.tty;
-
+	tty = tty_port_tty_get(&mos7840_port->port->port);
 	if (tty && mos7840_port->open)
 		tty_wakeup(tty);
+	tty_kref_put(tty);
 
 }
 
diff --git a/drivers/usb/serial/navman.c b/drivers/usb/serial/navman.c
index d673653..bcdcbb8 100644
--- a/drivers/usb/serial/navman.c
+++ b/drivers/usb/serial/navman.c
@@ -64,12 +64,13 @@
 	usb_serial_debug_data(debug, &port->dev, __func__,
 			      urb->actual_length, data);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length);
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 exit:
 	result = usb_submit_urb(urb, GFP_ATOMIC);
diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index ae8e227..c4d70b0 100644
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -172,7 +172,7 @@
 	dbg("%s - port %d", __func__, port->number);
 
 	wport = serial->port[1];
-	wport->port.tty = tty;		/* FIXME */
+	tty_port_tty_set(&wport->port, tty);
 
 	/* Start reading from the device */
 	usb_fill_bulk_urb(port->read_urb, serial->dev,
@@ -229,9 +229,11 @@
 	}
 
 	if (urb->actual_length && header->oh_len) {
-		tty_insert_flip_string(port->port.tty,
-			data + OMNINET_DATAOFFSET, header->oh_len);
-		tty_flip_buffer_push(port->port.tty);
+		struct tty_struct *tty = tty_port_tty_get(&port->port);
+		tty_insert_flip_string(tty, data + OMNINET_DATAOFFSET,
+							header->oh_len);
+		tty_flip_buffer_push(tty);
+		tty_kref_put(tty);
 	}
 
 	/* Continue trying to always read  */
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 73f8277..6b1727e 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -571,14 +571,14 @@
 		dbg("%s: nonzero status: %d on endpoint %02x.",
 		    __func__, status, endpoint);
 	} else {
-		tty = port->port.tty;
+		tty = tty_port_tty_get(&port->port);
 		if (urb->actual_length) {
 			tty_buffer_request_room(tty, urb->actual_length);
 			tty_insert_flip_string(tty, data, urb->actual_length);
 			tty_flip_buffer_push(tty);
-		} else {
+		} else 
 			dbg("%s: empty read urb received", __func__);
-		}
+		tty_kref_put(tty);
 
 		/* Resubmit urb so we continue receiving */
 		if (port->port.count && status != -ESHUTDOWN) {
@@ -647,9 +647,13 @@
 			portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 			portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 
-			if (port->port.tty && !C_CLOCAL(port->port.tty) &&
-					old_dcd_state && !portdata->dcd_state)
-				tty_hangup(port->port.tty);
+			if (old_dcd_state && !portdata->dcd_state) {
+				struct tty_struct *tty =
+						tty_port_tty_get(&port->port);
+				if (tty && !C_CLOCAL(tty))
+					tty_hangup(tty);
+				tty_kref_put(tty);
+			}
 		} else {
 			dbg("%s: type %x req %x", __func__,
 				req_pkt->bRequestType, req_pkt->bRequest);
@@ -793,7 +797,7 @@
 		for (i = 0; i < N_OUT_URB; i++)
 			usb_kill_urb(portdata->out_urbs[i]);
 	}
-	port->port.tty = NULL;	/* FIXME */
+	tty_port_tty_set(&port->port, NULL);
 }
 
 /* Helper functions used by option_setup_urbs */
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index 81db571..ba551f0 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -224,10 +224,6 @@
 	struct usb_serial_port *port;   /* USB port with which associated */
 };
 
-#undef dbg
-/* #define dbg(format, arg...) printk(KERN_INFO "%s: " format "\n", __FILE__, ## arg) */
-#define dbg(format, arg...) printk(KERN_INFO "" format "\n", ## arg)
-
 static void setup_line(struct work_struct *work)
 {
 	struct oti6858_private *priv = container_of(work,
@@ -1002,11 +998,12 @@
 		return;
 	}
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty != NULL && urb->actual_length > 0) {
 		tty_insert_flip_string(tty, data, urb->actual_length);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	/* schedule the interrupt urb if we are still open */
 	if (port->port.count != 0) {
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 1ede144..9084378 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -154,7 +154,6 @@
 	wait_queue_head_t delta_msr_wait;
 	u8 line_control;
 	u8 line_status;
-	u8 termios_initialized;
 	enum pl2303_type type;
 };
 
@@ -526,16 +525,6 @@
 
 	dbg("%s -  port %d", __func__, port->number);
 
-	spin_lock_irqsave(&priv->lock, flags);
-	if (!priv->termios_initialized) {
-		*(tty->termios) = tty_std_termios;
-		tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-		tty->termios->c_ispeed = 9600;
-		tty->termios->c_ospeed = 9600;
-		priv->termios_initialized = 1;
-	}
-	spin_unlock_irqrestore(&priv->lock, flags);
-
 	/* The PL2303 is reported to lose bytes if you change
 	   serial settings even to the same values as before. Thus
 	   we actually need to filter in this specific case */
@@ -1057,7 +1046,7 @@
 		tty_flag = TTY_FRAME;
 	dbg("%s - tty_flag = %d", __func__, tty_flag);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length + 1);
 		/* overrun is special, not associated with a char */
@@ -1067,7 +1056,7 @@
 			tty_insert_flip_char(tty, data[i], tty_flag);
 		tty_flip_buffer_push(tty);
 	}
-
+	tty_kref_put(tty);
 	/* Schedule the next read _if_ we are still open */
 	if (port->port.count) {
 		urb->dev = port->serial->dev;
diff --git a/drivers/usb/serial/safe_serial.c b/drivers/usb/serial/safe_serial.c
index def52d0..72903ac 100644
--- a/drivers/usb/serial/safe_serial.c
+++ b/drivers/usb/serial/safe_serial.c
@@ -217,6 +217,7 @@
 	struct usb_serial_port *port =  urb->context;
 	unsigned char *data = urb->transfer_buffer;
 	unsigned char length = urb->actual_length;
+	struct tty_struct *tty;
 	int result;
 	int status = urb->status;
 
@@ -242,6 +243,7 @@
 		printk("\n");
 	}
 #endif
+	tty = tty_port_tty_get(&port->port);
 	if (safe) {
 		__u16 fcs;
 		fcs = fcs_compute10(data, length, CRC10_INITFCS);
@@ -250,9 +252,9 @@
 			if (actual_length <= (length - 2)) {
 				info("%s - actual: %d", __func__,
 							actual_length);
-				tty_insert_flip_string(port->port.tty,
+				tty_insert_flip_string(tty,
 							data, actual_length);
-				tty_flip_buffer_push(port->port.tty);
+				tty_flip_buffer_push(tty);
 			} else {
 				err("%s - inconsistent lengths %d:%d",
 					__func__, actual_length, length);
@@ -261,9 +263,10 @@
 			err("%s - bad CRC %x", __func__, fcs);
 		}
 	} else {
-		tty_insert_flip_string(port->port.tty, data, length);
-		tty_flip_buffer_push(port->port.tty);
+		tty_insert_flip_string(tty, data, length);
+		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	/* Continue trying to always read  */
 	usb_fill_bulk_urb(urb, port->serial->dev,
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index ea1a103..8b9eaf3 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -440,14 +440,14 @@
 		dbg("%s: nonzero status: %d on endpoint %02x.",
 		    __func__, status, endpoint);
 	} else {
-		tty = port->port.tty;
 		if (urb->actual_length) {
+		tty = tty_port_tty_get(&port->port);
 			tty_buffer_request_room(tty, urb->actual_length);
 			tty_insert_flip_string(tty, data, urb->actual_length);
 			tty_flip_buffer_push(tty);
-		} else {
+			tty_kref_put(tty);
+		} else
 			dbg("%s: empty read urb received", __func__);
-		}
 
 		/* Resubmit urb so we continue receiving */
 		if (port->port.count && status != -ESHUTDOWN) {
@@ -485,6 +485,7 @@
 			unsigned char signals = *((unsigned char *)
 					urb->transfer_buffer +
 					sizeof(struct usb_ctrlrequest));
+			struct tty_struct *tty;
 
 			dbg("%s: signal x%x", __func__, signals);
 
@@ -494,9 +495,11 @@
 			portdata->dsr_state = ((signals & 0x02) ? 1 : 0);
 			portdata->ri_state = ((signals & 0x08) ? 1 : 0);
 
-			if (port->port.tty && !C_CLOCAL(port->port.tty) &&
+			tty = tty_port_tty_get(&port->port);
+			if (tty && !C_CLOCAL(tty) &&
 					old_dcd_state && !portdata->dcd_state)
-				tty_hangup(port->port.tty);
+				tty_hangup(tty);
+			tty_kref_put(tty);
 		} else {
 			dbg("%s: type %x req %x", __func__,
 				req_pkt->bRequestType, req_pkt->bRequest);
@@ -616,8 +619,7 @@
 	}
 
 	usb_kill_urb(port->interrupt_in_urb);
-
-	port->port.tty = NULL;	/* FIXME */
+	tty_port_tty_set(&port->port, NULL);
 }
 
 static int sierra_startup(struct usb_serial *serial)
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c
index 283cf6b..1533d6e 100644
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -755,7 +755,7 @@
 		tty_flag = TTY_FRAME;
 	dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (tty && urb->actual_length) {
 		tty_buffer_request_room(tty, urb->actual_length + 1);
 		/* overrun is special, not associated with a char */
@@ -765,6 +765,7 @@
 			tty_insert_flip_char(tty, data[i], tty_flag);
 		tty_flip_buffer_push(tty);
 	}
+	tty_kref_put(tty);
 
 	/* Schedule the next read _if_ we are still open */
 	if (port->port.count) {
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 9a3e495..c90237d 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -179,7 +179,7 @@
 static int ti_get_lsr(struct ti_port *tport);
 static int ti_get_serial_info(struct ti_port *tport,
 	struct serial_struct __user *ret_arg);
-static int ti_set_serial_info(struct ti_port *tport,
+static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 	struct serial_struct __user *new_arg);
 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 
@@ -857,8 +857,8 @@
 				(struct serial_struct __user *)arg);
 	case TIOCSSERIAL:
 		dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
-		return ti_set_serial_info(tport,
-					(struct serial_struct __user *)arg);
+		return ti_set_serial_info(tty, tport,
+				(struct serial_struct __user *)arg);
 	case TIOCMIWAIT:
 		dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 		cprev = tport->tp_icount;
@@ -1211,6 +1211,7 @@
 	struct device *dev = &urb->dev->dev;
 	int status = urb->status;
 	int retval = 0;
+	struct tty_struct *tty;
 
 	dbg("%s", __func__);
 
@@ -1239,20 +1240,22 @@
 		return;
 	}
 
-	if (port->port.tty && urb->actual_length) {
+	tty = tty_port_tty_get(&port->port);
+	if (tty && urb->actual_length) {
 		usb_serial_debug_data(debug, dev, __func__,
 			urb->actual_length, urb->transfer_buffer);
 
 		if (!tport->tp_is_open)
 			dbg("%s - port closed, dropping data", __func__);
 		else
-			ti_recv(&urb->dev->dev, port->port.tty,
+			ti_recv(&urb->dev->dev, tty,
 						urb->transfer_buffer,
 						urb->actual_length);
 
 		spin_lock(&tport->tp_lock);
 		tport->tp_icount.rx += urb->actual_length;
 		spin_unlock(&tport->tp_lock);
+		tty_kref_put(tty);
 	}
 
 exit:
@@ -1330,7 +1333,7 @@
 {
 	int count, result;
 	struct usb_serial_port *port = tport->tp_port;
-	struct tty_struct *tty = port->port.tty;	/* FIXME */
+	struct tty_struct *tty = tty_port_tty_get(&port->port);	/* FIXME */
 	unsigned long flags;
 
 
@@ -1338,19 +1341,15 @@
 
 	spin_lock_irqsave(&tport->tp_lock, flags);
 
-	if (tport->tp_write_urb_in_use) {
-		spin_unlock_irqrestore(&tport->tp_lock, flags);
-		return;
-	}
+	if (tport->tp_write_urb_in_use)
+		goto unlock;
 
 	count = ti_buf_get(tport->tp_write_buf,
 				port->write_urb->transfer_buffer,
 				port->bulk_out_size);
 
-	if (count == 0) {
-		spin_unlock_irqrestore(&tport->tp_lock, flags);
-		return;
-	}
+	if (count == 0)
+		goto unlock;
 
 	tport->tp_write_urb_in_use = 1;
 
@@ -1380,7 +1379,13 @@
 	/* more room in the buffer for new writes, wakeup */
 	if (tty)
 		tty_wakeup(tty);
+	tty_kref_put(tty);
 	wake_up_interruptible(&tport->tp_write_wait);
+	return;
+unlock:
+	spin_unlock_irqrestore(&tport->tp_lock, flags);
+	tty_kref_put(tty);
+	return;
 }
 
 
@@ -1464,20 +1469,16 @@
 }
 
 
-static int ti_set_serial_info(struct ti_port *tport,
+static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 	struct serial_struct __user *new_arg)
 {
-	struct usb_serial_port *port = tport->tp_port;
 	struct serial_struct new_serial;
 
 	if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
 		return -EFAULT;
 
 	tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
-	/* FIXME */
-	if (port->port.tty)
-		port->port.tty->low_latency =
-			(tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+	tty->low_latency = (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 	tport->tp_closing_wait = new_serial.closing_wait;
 
 	return 0;
@@ -1510,7 +1511,7 @@
 	tport->tp_msr = msr & TI_MSR_MASK;
 
 	/* handle CTS flow control */
-	tty = tport->tp_port->port.tty;
+	tty = tty_port_tty_get(&tport->tp_port->port);
 	if (tty && C_CRTSCTS(tty)) {
 		if (msr & TI_MSR_CTS) {
 			tty->hw_stopped = 0;
@@ -1519,6 +1520,7 @@
 			tty->hw_stopped = 1;
 		}
 	}
+	tty_kref_put(tty);
 }
 
 
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 4f7f9e3..e7d4246 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -214,7 +214,7 @@
 	/* set up our port structure making the tty driver
 	 * remember our port object, and us it */
 	tty->driver_data = port;
-	port->port.tty = tty;
+	tty_port_tty_set(&port->port, tty);
 
 	if (port->port.count == 1) {
 
@@ -246,7 +246,7 @@
 bailout_mutex_unlock:
 	port->port.count = 0;
 	tty->driver_data = NULL;
-	port->port.tty = NULL;
+	tty_port_tty_set(&port->port, NULL);
 	mutex_unlock(&port->mutex);
 bailout_kref_put:
 	usb_serial_put(serial);
@@ -276,10 +276,11 @@
 		port->serial->type->close(tty, port, filp);
 
 	if (port->port.count == (port->console? 1 : 0)) {
-		if (port->port.tty) {
-			if (port->port.tty->driver_data)
-				port->port.tty->driver_data = NULL;
-			port->port.tty = NULL;
+		struct tty_struct *tty = tty_port_tty_get(&port->port);
+		if (tty) {
+			if (tty->driver_data)
+				tty->driver_data = NULL;
+			tty_port_tty_set(&port->port, NULL);
 		}
 	}
 
@@ -508,11 +509,12 @@
 	if (!port)
 		return;
 
-	tty = port->port.tty;
+	tty = tty_port_tty_get(&port->port);
 	if (!tty)
 		return;
 
 	tty_wakeup(tty);
+	tty_kref_put(tty);
 }
 
 static void port_release(struct device *dev)
@@ -819,6 +821,7 @@
 		port = kzalloc(sizeof(struct usb_serial_port), GFP_KERNEL);
 		if (!port)
 			goto probe_error;
+		tty_port_init(&port->port);
 		port->serial = serial;
 		spin_lock_init(&port->lock);
 		mutex_init(&port->mutex);
@@ -1040,8 +1043,11 @@
 	for (i = 0; i < serial->num_ports; ++i) {
 		port = serial->port[i];
 		if (port) {
-			if (port->port.tty)
-				tty_hangup(port->port.tty);
+			struct tty_struct *tty = tty_port_tty_get(&port->port);
+			if (tty) {
+				tty_hangup(tty);
+				tty_kref_put(tty);
+			}
 			kill_traffic(port);
 		}
 	}
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index cf8924f..a6d1c75 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -499,7 +499,7 @@
 	int status = urb->status;
 	struct tty_struct *tty;
 	int result;
-	int available_room;
+	int available_room = 0;
 
 	dbg("%s - port %d", __func__, port->number);
 
@@ -512,13 +512,17 @@
 	usb_serial_debug_data(debug, &port->dev, __func__,
 						urb->actual_length, data);
 
-	tty = port->port.tty;
-	if (tty && urb->actual_length) {
-		available_room = tty_buffer_request_room(tty,
+	if (urb->actual_length) {
+		tty = tty_port_tty_get(&port->port);
+		if (tty) {
+			available_room = tty_buffer_request_room(tty,
 							urb->actual_length);
-		if (available_room) {
-			tty_insert_flip_string(tty, data, available_room);
-			tty_flip_buffer_push(tty);
+			if (available_room) {
+				tty_insert_flip_string(tty, data,
+							available_room);
+				tty_flip_buffer_push(tty);
+			}
+			tty_kref_put(tty);
 		}
 		spin_lock(&priv->lock);
 		priv->bytes_in += available_room;
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 3a9d143..11c8b97 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -1481,7 +1481,7 @@
 	struct whiteheat_private *info =
 		container_of(work, struct whiteheat_private, rx_work);
 	struct usb_serial_port *port = info->port;
-	struct tty_struct *tty = port->port.tty;
+	struct tty_struct *tty = tty_port_tty_get(&port->port);
 	struct whiteheat_urb_wrap *wrap;
 	struct urb *urb;
 	unsigned long flags;
@@ -1493,7 +1493,7 @@
 	spin_lock_irqsave(&info->lock, flags);
 	if (info->flags & THROTTLED) {
 		spin_unlock_irqrestore(&info->lock, flags);
-		return;
+		goto out;
 	}
 
 	list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
@@ -1513,7 +1513,7 @@
 				spin_unlock_irqrestore(&info->lock, flags);
 				tty_flip_buffer_push(tty);
 				schedule_work(&info->rx_work);
-				return;
+				goto out;
 			}
 			tty_insert_flip_string(tty, urb->transfer_buffer, len);
 			sent += len;
@@ -1536,6 +1536,8 @@
 
 	if (sent)
 		tty_flip_buffer_push(tty);
+out:
+	tty_kref_put(tty);
 }
 
 
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 488eb42..a70d5d0 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -27,6 +27,7 @@
 #define DEVPTS_SUPER_MAGIC 0x1cd1
 
 #define DEVPTS_DEFAULT_MODE 0600
+#define PTMX_MINOR	2
 
 extern int pty_limit;			/* Config limit on Unix98 ptys */
 static DEFINE_IDA(allocated_ptys);
@@ -169,15 +170,7 @@
  * to the System V naming convention
  */
 
-static struct dentry *get_node(int num)
-{
-	char s[12];
-	struct dentry *root = devpts_root;
-	mutex_lock(&root->d_inode->i_mutex);
-	return lookup_one_len(s, root, sprintf(s, "%d", num));
-}
-
-int devpts_new_index(void)
+int devpts_new_index(struct inode *ptmx_inode)
 {
 	int index;
 	int ida_ret;
@@ -205,20 +198,21 @@
 	return index;
 }
 
-void devpts_kill_index(int idx)
+void devpts_kill_index(struct inode *ptmx_inode, int idx)
 {
 	mutex_lock(&allocated_ptys_lock);
 	ida_remove(&allocated_ptys, idx);
 	mutex_unlock(&allocated_ptys_lock);
 }
 
-int devpts_pty_new(struct tty_struct *tty)
+int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
 {
 	int number = tty->index; /* tty layer puts index from devpts_new_index() in here */
 	struct tty_driver *driver = tty->driver;
 	dev_t device = MKDEV(driver->major, driver->minor_start+number);
 	struct dentry *dentry;
 	struct inode *inode = new_inode(devpts_mnt->mnt_sb);
+	char s[12];
 
 	/* We're supposed to be given the slave end of a pty */
 	BUG_ON(driver->type != TTY_DRIVER_TYPE_PTY);
@@ -233,10 +227,15 @@
 	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
 	init_special_inode(inode, S_IFCHR|config.mode, device);
 	inode->i_private = tty;
+	tty->driver_data = inode;
 
-	dentry = get_node(number);
-	if (!IS_ERR(dentry) && !dentry->d_inode) {
-		d_instantiate(dentry, inode);
+	sprintf(s, "%d", number);
+
+	mutex_lock(&devpts_root->d_inode->i_mutex);
+
+	dentry = d_alloc_name(devpts_root, s);
+	if (!IS_ERR(dentry)) {
+		d_add(dentry, inode);
 		fsnotify_create(devpts_root->d_inode, dentry);
 	}
 
@@ -245,36 +244,31 @@
 	return 0;
 }
 
-struct tty_struct *devpts_get_tty(int number)
+struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
 {
-	struct dentry *dentry = get_node(number);
-	struct tty_struct *tty;
+	BUG_ON(pts_inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR));
 
-	tty = NULL;
-	if (!IS_ERR(dentry)) {
-		if (dentry->d_inode)
-			tty = dentry->d_inode->i_private;
-		dput(dentry);
-	}
-
-	mutex_unlock(&devpts_root->d_inode->i_mutex);
-
-	return tty;
+	if (pts_inode->i_sb->s_magic == DEVPTS_SUPER_MAGIC)
+		return (struct tty_struct *)pts_inode->i_private;
+	return NULL;
 }
 
-void devpts_pty_kill(int number)
+void devpts_pty_kill(struct tty_struct *tty)
 {
-	struct dentry *dentry = get_node(number);
+	struct inode *inode = tty->driver_data;
+	struct dentry *dentry;
 
-	if (!IS_ERR(dentry)) {
-		struct inode *inode = dentry->d_inode;
-		if (inode) {
-			inode->i_nlink--;
-			d_delete(dentry);
-			dput(dentry);
-		}
+	BUG_ON(inode->i_rdev == MKDEV(TTYAUX_MAJOR, PTMX_MINOR));
+
+	mutex_lock(&devpts_root->d_inode->i_mutex);
+
+	dentry = d_find_alias(inode);
+	if (dentry && !IS_ERR(dentry)) {
+		inode->i_nlink--;
+		d_delete(dentry);
 		dput(dentry);
 	}
+
 	mutex_unlock(&devpts_root->d_inode->i_mutex);
 }
 
diff --git a/fs/dquot.c b/fs/dquot.c
index 8ec4d6c..ad7e590 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -895,10 +895,9 @@
 	    warntype == QUOTA_NL_BSOFTBELOW || !need_print_warning(dquot))
 		return;
 
-	mutex_lock(&tty_mutex);
 	tty = get_current_tty();
 	if (!tty)
-		goto out_lock;
+		return;
 	tty_write_message(tty, dquot->dq_sb->s_id);
 	if (warntype == QUOTA_NL_ISOFTWARN || warntype == QUOTA_NL_BSOFTWARN)
 		tty_write_message(tty, ": warning, ");
@@ -926,8 +925,7 @@
 			break;
 	}
 	tty_write_message(tty, msg);
-out_lock:
-	mutex_unlock(&tty_mutex);
+	tty_kref_put(tty);
 }
 #endif
 
diff --git a/fs/open.c b/fs/open.c
index 07da935..5596049 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1141,8 +1141,7 @@
 asmlinkage long sys_vhangup(void)
 {
 	if (capable(CAP_SYS_TTY_CONFIG)) {
-		/* XXX: this needs locking */
-		tty_vhangup(current->signal->tty);
+		tty_vhangup_self();
 		return 0;
 	}
 	return -EPERM;
diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index ebc3078..f06adac 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -351,22 +351,18 @@
 	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
 }
 
+static inline void set_system_trap_gate(unsigned int n, void *addr)
+{
+	BUG_ON((unsigned)n > 0xFF);
+	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
+}
+
 static inline void set_trap_gate(unsigned int n, void *addr)
 {
 	BUG_ON((unsigned)n > 0xFF);
 	_set_gate(n, GATE_TRAP, addr, 0, 0, __KERNEL_CS);
 }
 
-static inline void set_system_gate(unsigned int n, void *addr)
-{
-	BUG_ON((unsigned)n > 0xFF);
-#ifdef CONFIG_X86_32
-	_set_gate(n, GATE_TRAP, addr, 0x3, 0, __KERNEL_CS);
-#else
-	_set_gate(n, GATE_INTERRUPT, addr, 0x3, 0, __KERNEL_CS);
-#endif
-}
-
 static inline void set_task_gate(unsigned int n, unsigned int gdt_entry)
 {
 	BUG_ON((unsigned)n > 0xFF);
@@ -379,7 +375,7 @@
 	_set_gate(n, GATE_INTERRUPT, addr, 0, ist, __KERNEL_CS);
 }
 
-static inline void set_system_gate_ist(int n, void *addr, unsigned ist)
+static inline void set_system_intr_gate_ist(int n, void *addr, unsigned ist)
 {
 	BUG_ON((unsigned)n > 0xFF);
 	_set_gate(n, GATE_INTERRUPT, addr, 0x3, ist, __KERNEL_CS);
diff --git a/include/asm-x86/es7000/mpparse.h b/include/asm-x86/es7000/mpparse.h
index 7b5c889..ed5a3ca 100644
--- a/include/asm-x86/es7000/mpparse.h
+++ b/include/asm-x86/es7000/mpparse.h
@@ -5,6 +5,7 @@
 
 extern int parse_unisys_oem (char *oemptr);
 extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
+extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
 extern void setup_unisys(void);
 
 #ifndef CONFIG_X86_GENERICARCH
diff --git a/include/asm-x86/fixmap_32.h b/include/asm-x86/fixmap_32.h
index 784e3e7..8844002 100644
--- a/include/asm-x86/fixmap_32.h
+++ b/include/asm-x86/fixmap_32.h
@@ -94,10 +94,10 @@
 	 * can have a single pgd entry and a single pte table:
 	 */
 #define NR_FIX_BTMAPS		64
-#define FIX_BTMAPS_NESTING	4
+#define FIX_BTMAPS_SLOTS	4
 	FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
 			(__end_of_permanent_fixed_addresses & 255),
-	FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+	FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
 	FIX_WP_TEST,
 #ifdef CONFIG_ACPI
 	FIX_ACPI_BEGIN,
diff --git a/include/asm-x86/fixmap_64.h b/include/asm-x86/fixmap_64.h
index dafb24b..dab4751 100644
--- a/include/asm-x86/fixmap_64.h
+++ b/include/asm-x86/fixmap_64.h
@@ -49,6 +49,7 @@
 #ifdef CONFIG_PARAVIRT
 	FIX_PARAVIRT_BOOTMAP,
 #endif
+	__end_of_permanent_fixed_addresses,
 #ifdef CONFIG_ACPI
 	FIX_ACPI_BEGIN,
 	FIX_ACPI_END = FIX_ACPI_BEGIN + FIX_ACPI_PAGES - 1,
@@ -56,19 +57,18 @@
 #ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
 	FIX_OHCI1394_BASE,
 #endif
-	__end_of_permanent_fixed_addresses,
 	/*
 	 * 256 temporary boot-time mappings, used by early_ioremap(),
 	 * before ioremap() is functional.
 	 *
-	 * We round it up to the next 512 pages boundary so that we
+	 * We round it up to the next 256 pages boundary so that we
 	 * can have a single pgd entry and a single pte table:
 	 */
 #define NR_FIX_BTMAPS		64
-#define FIX_BTMAPS_NESTING	4
-	FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -
-			(__end_of_permanent_fixed_addresses & 511),
-	FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,
+#define FIX_BTMAPS_SLOTS	4
+	FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -
+			(__end_of_permanent_fixed_addresses & 255),
+	FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_SLOTS - 1,
 	__end_of_fixed_addresses
 };
 
diff --git a/include/asm-x86/io.h b/include/asm-x86/io.h
index 72b7719..a233f83 100644
--- a/include/asm-x86/io.h
+++ b/include/asm-x86/io.h
@@ -5,20 +5,6 @@
 
 #include <linux/compiler.h>
 
-/*
- * early_ioremap() and early_iounmap() are for temporary early boot-time
- * mappings, before the real ioremap() is functional.
- * A boot-time mapping is currently limited to at most 16 pages.
- */
-#ifndef __ASSEMBLY__
-extern void early_ioremap_init(void);
-extern void early_ioremap_clear(void);
-extern void early_ioremap_reset(void);
-extern void *early_ioremap(unsigned long offset, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
-#endif
-
 #define build_mmio_read(name, size, type, reg, barrier) \
 static inline type name(const volatile void __iomem *addr) \
 { type ret; asm volatile("mov" size " %1,%0":reg (ret) \
@@ -97,6 +83,7 @@
 extern void early_ioremap_clear(void);
 extern void early_ioremap_reset(void);
 extern void *early_ioremap(unsigned long offset, unsigned long size);
+extern void *early_memremap(unsigned long offset, unsigned long size);
 extern void early_iounmap(void *addr, unsigned long size);
 extern void __iomem *fix_ioremap(unsigned idx, unsigned long phys);
 
diff --git a/include/asm-x86/io_64.h b/include/asm-x86/io_64.h
index 64429e9..ee6e086 100644
--- a/include/asm-x86/io_64.h
+++ b/include/asm-x86/io_64.h
@@ -165,9 +165,6 @@
 
 #include <asm-generic/iomap.h>
 
-extern void *early_ioremap(unsigned long addr, unsigned long size);
-extern void early_iounmap(void *addr, unsigned long size);
-
 /*
  * This one maps high address device memory and turns off caching for that area.
  * it's useful if some control registers are in such an area and write combining
diff --git a/include/asm-x86/ioctls.h b/include/asm-x86/ioctls.h
index 3366035..06752a6 100644
--- a/include/asm-x86/ioctls.h
+++ b/include/asm-x86/ioctls.h
@@ -51,9 +51,15 @@
 #define TCSETS2		_IOW('T', 0x2B, struct termios2)
 #define TCSETSW2	_IOW('T', 0x2C, struct termios2)
 #define TCSETSF2	_IOW('T', 0x2D, struct termios2)
+#define TIOCGRS485	0x542E
+#define TIOCSRS485	0x542F
 #define TIOCGPTN	_IOR('T', 0x30, unsigned int)
 				/* Get Pty Number (of pty-mux device) */
 #define TIOCSPTLCK	_IOW('T', 0x31, int)  /* Lock/unlock Pty */
+#define TCGETX		0x5432 /* SYS5 TCGETX compatibility */
+#define TCSETX		0x5433
+#define TCSETXF		0x5434
+#define TCSETXW		0x5435
 
 #define FIONCLEX	0x5450
 #define FIOCLEX		0x5451
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h
index 424acb4..2bdab21 100644
--- a/include/asm-x86/irqflags.h
+++ b/include/asm-x86/irqflags.h
@@ -166,27 +166,6 @@
 	return raw_irqs_disabled_flags(flags);
 }
 
-/*
- * makes the traced hardirq state match with the machine state
- *
- * should be a rarely used function, only in places where its
- * otherwise impossible to know the irq state, like in traps.
- */
-static inline void trace_hardirqs_fixup_flags(unsigned long flags)
-{
-	if (raw_irqs_disabled_flags(flags))
-		trace_hardirqs_off();
-	else
-		trace_hardirqs_on();
-}
-
-static inline void trace_hardirqs_fixup(void)
-{
-	unsigned long flags = __raw_local_save_flags();
-
-	trace_hardirqs_fixup_flags(flags);
-}
-
 #else
 
 #ifdef CONFIG_X86_64
diff --git a/include/asm-x86/kdebug.h b/include/asm-x86/kdebug.h
index 5ec3ad3..fbbab66 100644
--- a/include/asm-x86/kdebug.h
+++ b/include/asm-x86/kdebug.h
@@ -27,10 +27,9 @@
 extern void die(const char *, struct pt_regs *,long);
 extern int __must_check __die(const char *, struct pt_regs *, long);
 extern void show_registers(struct pt_regs *regs);
-extern void __show_registers(struct pt_regs *, int all);
 extern void show_trace(struct task_struct *t, struct pt_regs *regs,
 		       unsigned long *sp, unsigned long bp);
-extern void __show_regs(struct pt_regs *regs);
+extern void __show_regs(struct pt_regs *regs, int all);
 extern void show_regs(struct pt_regs *regs);
 extern unsigned long oops_begin(void);
 extern void oops_end(unsigned long, struct pt_regs *, int signr);
diff --git a/include/asm-x86/kprobes.h b/include/asm-x86/kprobes.h
index bd84078..8a0748d 100644
--- a/include/asm-x86/kprobes.h
+++ b/include/asm-x86/kprobes.h
@@ -82,15 +82,6 @@
 	struct prev_kprobe prev_kprobe;
 };
 
-/* trap3/1 are intr gates for kprobes.  So, restore the status of IF,
- * if necessary, before executing the original int3/1 (trap) handler.
- */
-static inline void restore_interrupts(struct pt_regs *regs)
-{
-	if (regs->flags & X86_EFLAGS_IF)
-		local_irq_enable();
-}
-
 extern int kprobe_fault_handler(struct pt_regs *regs, int trapnr);
 extern int kprobe_exceptions_notify(struct notifier_block *self,
 				    unsigned long val, void *data);
diff --git a/include/asm-x86/mach-default/mach_traps.h b/include/asm-x86/mach-default/mach_traps.h
index de9ac3f..ff8778f 100644
--- a/include/asm-x86/mach-default/mach_traps.h
+++ b/include/asm-x86/mach-default/mach_traps.h
@@ -7,12 +7,6 @@
 
 #include <asm/mc146818rtc.h>
 
-static inline void clear_mem_error(unsigned char reason)
-{
-	reason = (reason & 0xf) | 4;
-	outb(reason, 0x61);
-}
-
 static inline unsigned char get_nmi_reason(void)
 {
 	return inb(0x61);
diff --git a/include/asm-x86/module.h b/include/asm-x86/module.h
index 48dc3e0..864f200 100644
--- a/include/asm-x86/module.h
+++ b/include/asm-x86/module.h
@@ -52,8 +52,6 @@
 #define MODULE_PROC_FAMILY "EFFICEON "
 #elif defined CONFIG_MWINCHIPC6
 #define MODULE_PROC_FAMILY "WINCHIPC6 "
-#elif defined CONFIG_MWINCHIP2
-#define MODULE_PROC_FAMILY "WINCHIP2 "
 #elif defined CONFIG_MWINCHIP3D
 #define MODULE_PROC_FAMILY "WINCHIP3D "
 #elif defined CONFIG_MCYRIXIII
diff --git a/include/asm-x86/nmi.h b/include/asm-x86/nmi.h
index d5e715f..a53f829 100644
--- a/include/asm-x86/nmi.h
+++ b/include/asm-x86/nmi.h
@@ -15,10 +15,6 @@
  */
 int do_nmi_callback(struct pt_regs *regs, int cpu);
 
-#ifdef CONFIG_X86_64
-extern void default_do_nmi(struct pt_regs *);
-#endif
-
 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
 extern int check_nmi_watchdog(void);
 extern int nmi_watchdog_enabled;
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index c915747..d4f1d57 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -179,6 +179,7 @@
 #endif	/* CONFIG_PARAVIRT */
 
 #define __pa(x)		__phys_addr((unsigned long)(x))
+#define __pa_nodebug(x)	__phys_addr_nodebug((unsigned long)(x))
 /* __pa_symbol should be used for C visible symbols.
    This seems to be the official gcc blessed way to do such arithmetic. */
 #define __pa_symbol(x)	__pa(__phys_reloc_hide((unsigned long)(x)))
@@ -188,9 +189,14 @@
 #define __boot_va(x)		__va(x)
 #define __boot_pa(x)		__pa(x)
 
+/*
+ * virt_to_page(kaddr) returns a valid pointer if and only if
+ * virt_addr_valid(kaddr) returns true.
+ */
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
 #define pfn_to_kaddr(pfn)      __va((pfn) << PAGE_SHIFT)
-#define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+extern bool __virt_addr_valid(unsigned long kaddr);
+#define virt_addr_valid(kaddr)	__virt_addr_valid((unsigned long) (kaddr))
 
 #endif	/* __ASSEMBLY__ */
 
diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h
index 9c5a737..e8d80d1 100644
--- a/include/asm-x86/page_32.h
+++ b/include/asm-x86/page_32.h
@@ -20,6 +20,12 @@
 #endif
 #define THREAD_SIZE 	(PAGE_SIZE << THREAD_ORDER)
 
+#define STACKFAULT_STACK 0
+#define DOUBLEFAULT_STACK 1
+#define NMI_STACK 0
+#define DEBUG_STACK 0
+#define MCE_STACK 0
+#define N_EXCEPTION_STACKS 1
 
 #ifdef CONFIG_X86_PAE
 /* 44=32+12, the limit we can fit into an unsigned long pfn */
@@ -73,11 +79,11 @@
 #endif
 
 #ifndef __ASSEMBLY__
-#define __phys_addr_const(x)	((x) - PAGE_OFFSET)
+#define __phys_addr_nodebug(x)	((x) - PAGE_OFFSET)
 #ifdef CONFIG_DEBUG_VIRTUAL
 extern unsigned long __phys_addr(unsigned long);
 #else
-#define __phys_addr(x)		((x) - PAGE_OFFSET)
+#define __phys_addr(x)		__phys_addr_nodebug(x)
 #endif
 #define __phys_reloc_hide(x)	RELOC_HIDE((x), 0)
 
diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index ed93245..182f9d4 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -15,7 +15,7 @@
 #define _PAGE_BIT_PAT		7	/* on 4KB pages */
 #define _PAGE_BIT_GLOBAL	8	/* Global TLB entry PPro+ */
 #define _PAGE_BIT_UNUSED1	9	/* available for programmer */
-#define _PAGE_BIT_UNUSED2	10
+#define _PAGE_BIT_IOMAP		10	/* flag used to indicate IO mapping */
 #define _PAGE_BIT_UNUSED3	11
 #define _PAGE_BIT_PAT_LARGE	12	/* On 2MB or 1GB pages */
 #define _PAGE_BIT_SPECIAL	_PAGE_BIT_UNUSED1
@@ -32,7 +32,7 @@
 #define _PAGE_PSE	(_AT(pteval_t, 1) << _PAGE_BIT_PSE)
 #define _PAGE_GLOBAL	(_AT(pteval_t, 1) << _PAGE_BIT_GLOBAL)
 #define _PAGE_UNUSED1	(_AT(pteval_t, 1) << _PAGE_BIT_UNUSED1)
-#define _PAGE_UNUSED2	(_AT(pteval_t, 1) << _PAGE_BIT_UNUSED2)
+#define _PAGE_IOMAP	(_AT(pteval_t, 1) << _PAGE_BIT_IOMAP)
 #define _PAGE_UNUSED3	(_AT(pteval_t, 1) << _PAGE_BIT_UNUSED3)
 #define _PAGE_PAT	(_AT(pteval_t, 1) << _PAGE_BIT_PAT)
 #define _PAGE_PAT_LARGE (_AT(pteval_t, 1) << _PAGE_BIT_PAT_LARGE)
@@ -99,6 +99,11 @@
 #define __PAGE_KERNEL_LARGE_NOCACHE	(__PAGE_KERNEL | _PAGE_CACHE_UC | _PAGE_PSE)
 #define __PAGE_KERNEL_LARGE_EXEC	(__PAGE_KERNEL_EXEC | _PAGE_PSE)
 
+#define __PAGE_KERNEL_IO		(__PAGE_KERNEL | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_NOCACHE	(__PAGE_KERNEL_NOCACHE | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_UC_MINUS	(__PAGE_KERNEL_UC_MINUS | _PAGE_IOMAP)
+#define __PAGE_KERNEL_IO_WC		(__PAGE_KERNEL_WC | _PAGE_IOMAP)
+
 #define PAGE_KERNEL			__pgprot(__PAGE_KERNEL)
 #define PAGE_KERNEL_RO			__pgprot(__PAGE_KERNEL_RO)
 #define PAGE_KERNEL_EXEC		__pgprot(__PAGE_KERNEL_EXEC)
@@ -113,6 +118,11 @@
 #define PAGE_KERNEL_VSYSCALL		__pgprot(__PAGE_KERNEL_VSYSCALL)
 #define PAGE_KERNEL_VSYSCALL_NOCACHE	__pgprot(__PAGE_KERNEL_VSYSCALL_NOCACHE)
 
+#define PAGE_KERNEL_IO			__pgprot(__PAGE_KERNEL_IO)
+#define PAGE_KERNEL_IO_NOCACHE		__pgprot(__PAGE_KERNEL_IO_NOCACHE)
+#define PAGE_KERNEL_IO_UC_MINUS		__pgprot(__PAGE_KERNEL_IO_UC_MINUS)
+#define PAGE_KERNEL_IO_WC		__pgprot(__PAGE_KERNEL_IO_WC)
+
 /*         xwr */
 #define __P000	PAGE_NONE
 #define __P001	PAGE_READONLY
@@ -196,7 +206,7 @@
 
 static inline int pte_special(pte_t pte)
 {
-	return pte_val(pte) & _PAGE_SPECIAL;
+	return pte_flags(pte) & _PAGE_SPECIAL;
 }
 
 static inline unsigned long pte_pfn(pte_t pte)
diff --git a/include/asm-x86/ptrace.h b/include/asm-x86/ptrace.h
index ac578f1..a202552 100644
--- a/include/asm-x86/ptrace.h
+++ b/include/asm-x86/ptrace.h
@@ -174,12 +174,8 @@
 
 extern unsigned long
 convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
-
-#ifdef CONFIG_X86_32
 extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
 			 int error_code, int si_code);
-#endif
-
 void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
 
 extern long syscall_trace_enter(struct pt_regs *);
diff --git a/include/asm-x86/segment.h b/include/asm-x86/segment.h
index ea5f0a8..5d6e694 100644
--- a/include/asm-x86/segment.h
+++ b/include/asm-x86/segment.h
@@ -131,12 +131,6 @@
  * Matching rules for certain types of segments.
  */
 
-/* Matches only __KERNEL_CS, ignoring PnP / USER / APM segments */
-#define SEGMENT_IS_KERNEL_CODE(x) (((x) & 0xfc) == GDT_ENTRY_KERNEL_CS * 8)
-
-/* Matches __KERNEL_CS and __USER_CS (they must be 2 entries apart) */
-#define SEGMENT_IS_FLAT_CODE(x)  (((x) & 0xec) == GDT_ENTRY_KERNEL_CS * 8)
-
 /* Matches PNP_CS32 and PNP_CS16 (they must be consecutive) */
 #define SEGMENT_IS_PNP_CODE(x)   (((x) & 0xf4) == GDT_ENTRY_PNPBIOS_BASE * 8)
 
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index 6df2615..a6afc29 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -141,6 +141,8 @@
 void native_send_call_func_ipi(cpumask_t mask);
 void native_send_call_func_single_ipi(int cpu);
 
+extern void prefill_possible_map(void);
+
 void smp_store_cpu_info(int id);
 #define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
 
@@ -149,15 +151,11 @@
 {
 	return cpus_weight(cpu_callout_map);
 }
-#endif /* CONFIG_SMP */
-
-#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_CPU)
-extern void prefill_possible_map(void);
 #else
 static inline void prefill_possible_map(void)
 {
 }
-#endif
+#endif /* CONFIG_SMP */
 
 extern unsigned disabled_cpus __cpuinitdata;
 
diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h
index 34505dd..b20c894 100644
--- a/include/asm-x86/system.h
+++ b/include/asm-x86/system.h
@@ -64,7 +64,10 @@
 		       							\
 		       /* regparm parameters for __switch_to(): */	\
 		       [prev]     "a" (prev),				\
-		       [next]     "d" (next));				\
+		       [next]     "d" (next)				\
+									\
+		     : /* reloaded segment registers */			\
+			"memory");					\
 } while (0)
 
 /*
diff --git a/include/asm-x86/traps.h b/include/asm-x86/traps.h
index 7a692ba..6c3dc2c 100644
--- a/include/asm-x86/traps.h
+++ b/include/asm-x86/traps.h
@@ -3,7 +3,12 @@
 
 #include <asm/debugreg.h>
 
-/* Common in X86_32 and X86_64 */
+#ifdef CONFIG_X86_32
+#define dotraplinkage
+#else
+#define dotraplinkage asmlinkage
+#endif
+
 asmlinkage void divide_error(void);
 asmlinkage void debug(void);
 asmlinkage void nmi(void);
@@ -12,31 +17,47 @@
 asmlinkage void bounds(void);
 asmlinkage void invalid_op(void);
 asmlinkage void device_not_available(void);
+#ifdef CONFIG_X86_64
+asmlinkage void double_fault(void);
+#endif
 asmlinkage void coprocessor_segment_overrun(void);
 asmlinkage void invalid_TSS(void);
 asmlinkage void segment_not_present(void);
 asmlinkage void stack_segment(void);
 asmlinkage void general_protection(void);
 asmlinkage void page_fault(void);
-asmlinkage void coprocessor_error(void);
-asmlinkage void simd_coprocessor_error(void);
-asmlinkage void alignment_check(void);
 asmlinkage void spurious_interrupt_bug(void);
+asmlinkage void coprocessor_error(void);
+asmlinkage void alignment_check(void);
 #ifdef CONFIG_X86_MCE
 asmlinkage void machine_check(void);
 #endif /* CONFIG_X86_MCE */
+asmlinkage void simd_coprocessor_error(void);
 
-void do_divide_error(struct pt_regs *, long);
-void do_overflow(struct pt_regs *, long);
-void do_bounds(struct pt_regs *, long);
-void do_coprocessor_segment_overrun(struct pt_regs *, long);
-void do_invalid_TSS(struct pt_regs *, long);
-void do_segment_not_present(struct pt_regs *, long);
-void do_stack_segment(struct pt_regs *, long);
-void do_alignment_check(struct pt_regs *, long);
-void do_invalid_op(struct pt_regs *, long);
-void do_general_protection(struct pt_regs *, long);
-void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_divide_error(struct pt_regs *, long);
+dotraplinkage void do_debug(struct pt_regs *, long);
+dotraplinkage void do_nmi(struct pt_regs *, long);
+dotraplinkage void do_int3(struct pt_regs *, long);
+dotraplinkage void do_overflow(struct pt_regs *, long);
+dotraplinkage void do_bounds(struct pt_regs *, long);
+dotraplinkage void do_invalid_op(struct pt_regs *, long);
+dotraplinkage void do_device_not_available(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_segment_overrun(struct pt_regs *, long);
+dotraplinkage void do_invalid_TSS(struct pt_regs *, long);
+dotraplinkage void do_segment_not_present(struct pt_regs *, long);
+dotraplinkage void do_stack_segment(struct pt_regs *, long);
+dotraplinkage void do_general_protection(struct pt_regs *, long);
+dotraplinkage void do_page_fault(struct pt_regs *, unsigned long);
+dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *, long);
+dotraplinkage void do_coprocessor_error(struct pt_regs *, long);
+dotraplinkage void do_alignment_check(struct pt_regs *, long);
+#ifdef CONFIG_X86_MCE
+dotraplinkage void do_machine_check(struct pt_regs *, long);
+#endif
+dotraplinkage void do_simd_coprocessor_error(struct pt_regs *, long);
+#ifdef CONFIG_X86_32
+dotraplinkage void do_iret_error(struct pt_regs *, long);
+#endif
 
 static inline int get_si_code(unsigned long condition)
 {
@@ -52,31 +73,9 @@
 extern int kstack_depth_to_print;
 
 #ifdef CONFIG_X86_32
-
-void do_iret_error(struct pt_regs *, long);
-void do_int3(struct pt_regs *, long);
-void do_debug(struct pt_regs *, long);
 void math_error(void __user *);
-void do_coprocessor_error(struct pt_regs *, long);
-void do_simd_coprocessor_error(struct pt_regs *, long);
-void do_spurious_interrupt_bug(struct pt_regs *, long);
 unsigned long patch_espfix_desc(unsigned long, unsigned long);
 asmlinkage void math_emulate(long);
+#endif
 
-void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#else /* CONFIG_X86_32 */
-
-asmlinkage void double_fault(void);
-
-asmlinkage void do_int3(struct pt_regs *, long);
-asmlinkage void do_stack_segment(struct pt_regs *, long);
-asmlinkage void do_debug(struct pt_regs *, unsigned long);
-asmlinkage void do_coprocessor_error(struct pt_regs *);
-asmlinkage void do_simd_coprocessor_error(struct pt_regs *);
-asmlinkage void do_spurious_interrupt_bug(struct pt_regs *);
-
-asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code);
-
-#endif /* CONFIG_X86_32 */
 #endif /* ASM_X86__TRAPS_H */
diff --git a/include/linux/devpts_fs.h b/include/linux/devpts_fs.h
index 154769c..5ce0e5f 100644
--- a/include/linux/devpts_fs.h
+++ b/include/linux/devpts_fs.h
@@ -17,20 +17,31 @@
 
 #ifdef CONFIG_UNIX98_PTYS
 
-int devpts_new_index(void);
-void devpts_kill_index(int idx);
-int devpts_pty_new(struct tty_struct *tty);      /* mknod in devpts */
-struct tty_struct *devpts_get_tty(int number);	 /* get tty structure */
-void devpts_pty_kill(int number);		 /* unlink */
+int devpts_new_index(struct inode *ptmx_inode);
+void devpts_kill_index(struct inode *ptmx_inode, int idx);
+/* mknod in devpts */
+int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty);
+/* get tty structure */
+struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number);
+/* unlink */
+void devpts_pty_kill(struct tty_struct *tty);
 
 #else
 
 /* Dummy stubs in the no-pty case */
-static inline int devpts_new_index(void) { return -EINVAL; }
-static inline void devpts_kill_index(int idx) { }
-static inline int devpts_pty_new(struct tty_struct *tty) { return -EINVAL; }
-static inline struct tty_struct *devpts_get_tty(int number) { return NULL; }
-static inline void devpts_pty_kill(int number) { }
+static inline int devpts_new_index(struct inode *ptmx_inode) { return -EINVAL; }
+static inline void devpts_kill_index(struct inode *ptmx_inode, int idx) { }
+static inline int devpts_pty_new(struct inode *ptmx_inode,
+				struct tty_struct *tty)
+{
+	return -EINVAL;
+}
+static inline struct tty_struct *devpts_get_tty(struct inode *pts_inode,
+		int number)
+{
+	return NULL;
+}
+static inline void devpts_pty_kill(struct tty_struct *tty) { }
 
 #endif
 
diff --git a/include/linux/hpet.h b/include/linux/hpet.h
index 2dc29ce..79f63a2 100644
--- a/include/linux/hpet.h
+++ b/include/linux/hpet.h
@@ -37,6 +37,7 @@
 #define	hpet_compare	_u1._hpet_compare
 
 #define	HPET_MAX_TIMERS	(32)
+#define	HPET_MAX_IRQ	(32)
 
 /*
  * HPET general capabilities register
@@ -64,7 +65,7 @@
  */
 
 #define	Tn_INT_ROUTE_CAP_MASK		(0xffffffff00000000ULL)
-#define	Tn_INI_ROUTE_CAP_SHIFT		(32UL)
+#define	Tn_INT_ROUTE_CAP_SHIFT		(32UL)
 #define	Tn_FSB_INT_DELCAP_MASK		(0x8000UL)
 #define	Tn_FSB_INT_DELCAP_SHIFT		(15)
 #define	Tn_FSB_EN_CNF_MASK		(0x4000UL)
@@ -91,23 +92,14 @@
  * exported interfaces
  */
 
-struct hpet_task {
-	void (*ht_func) (void *);
-	void *ht_data;
-	void *ht_opaque;
-};
-
 struct hpet_data {
 	unsigned long hd_phys_address;
 	void __iomem *hd_address;
 	unsigned short hd_nirqs;
-	unsigned short hd_flags;
 	unsigned int hd_state;	/* timer allocated */
 	unsigned int hd_irq[HPET_MAX_TIMERS];
 };
 
-#define	HPET_DATA_PLATFORM	0x0001	/* platform call to hpet_alloc */
-
 static inline void hpet_reserve_timer(struct hpet_data *hd, int timer)
 {
 	hd->hd_state |= (1 << timer);
@@ -125,7 +117,7 @@
 	unsigned short hi_timer;
 };
 
-#define	HPET_INFO_PERIODIC	0x0001	/* timer is periodic */
+#define HPET_INFO_PERIODIC	0x0010	/* periodic-capable comparator */
 
 #define	HPET_IE_ON	_IO('h', 0x01)	/* interrupt on */
 #define	HPET_IE_OFF	_IO('h', 0x02)	/* interrupt off */
diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h
index 041bb31..bcb8f72 100644
--- a/include/linux/oprofile.h
+++ b/include/linux/oprofile.h
@@ -36,6 +36,8 @@
 #define XEN_ENTER_SWITCH_CODE		10
 #define SPU_PROFILING_CODE		11
 #define SPU_CTX_SWITCH_CODE		12
+#define IBS_FETCH_CODE			13
+#define IBS_OP_CODE			14
 
 struct super_block;
 struct dentry;
diff --git a/include/linux/serial.h b/include/linux/serial.h
index deb7143..1ea8d92 100644
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -173,6 +173,22 @@
 	int reserved[9];
 };
 
+/*
+ * Serial interface for controlling RS485 settings on chips with suitable
+ * support. Set with TIOCSRS485 and get with TIOCGRS485 if supported by your
+ * platform. The set function returns the new state, with any unsupported bits
+ * reverted appropriately.
+ */
+
+struct serial_rs485 {
+	__u32	flags;			/* RS485 feature flags */
+#define SER_RS485_ENABLED		(1 << 0)
+#define SER_RS485_RTS_ON_SEND		(1 << 1)
+#define SER_RS485_RTS_AFTER_SEND	(1 << 2)
+	__u32	delay_rts_before_send;	/* Milliseconds */
+	__u32	padding[6];		/* Memory is cheap, new structs
+					   are a royal PITA .. */
+};
 
 #ifdef __KERNEL__
 #include <linux/compiler.h>
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 3b2f6c0..e27f216 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -241,7 +241,7 @@
 
 struct uart_port {
 	spinlock_t		lock;			/* port lock */
-	unsigned int		iobase;			/* in/out[bwl] */
+	unsigned long		iobase;			/* in/out[bwl] */
 	unsigned char __iomem	*membase;		/* read/write[bwl] */
 	unsigned int		irq;			/* irq number */
 	unsigned int		uartclk;		/* base uart clock */
diff --git a/include/linux/termios.h b/include/linux/termios.h
index 4786628..2acd0c1 100644
--- a/include/linux/termios.h
+++ b/include/linux/termios.h
@@ -4,4 +4,19 @@
 #include <linux/types.h>
 #include <asm/termios.h>
 
+#define NFF	5
+
+struct termiox
+{
+	__u16	x_hflag;
+	__u16	x_cflag;
+	__u16	x_rflag[NFF];
+	__u16	x_sflag;
+};
+
+#define	RTSXOFF		0x0001		/* RTS flow control on input */
+#define	CTSXON		0x0002		/* CTS flow control on output */
+#define	DTRXOFF		0x0004		/* DTR flow control on input */
+#define DSRXON		0x0008		/* DCD flow control on output */
+
 #endif
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 0cbec74..3b8121d 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
  */
 #define NR_UNIX98_PTY_DEFAULT	4096      /* Default maximum for Unix98 ptys */
 #define NR_UNIX98_PTY_MAX	(1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS		18
+#define NR_LDISCS		19
 
 /* line disciplines */
 #define N_TTY		0
@@ -45,6 +45,7 @@
 #define N_HCI		15	/* Bluetooth HCI UART */
 #define N_GIGASET_M101	16	/* Siemens Gigaset M101 serial DECT adapter */
 #define N_SLCAN		17	/* Serial / USB serial CAN Adaptors */
+#define N_PPS		18	/* Pulse per Second */
 
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as
@@ -181,6 +182,7 @@
 
 struct tty_port {
 	struct tty_struct	*tty;		/* Back pointer */
+	spinlock_t		lock;		/* Lock protecting tty field */
 	int			blocked_open;	/* Waiting to open */
 	int			count;		/* Usage count */
 	wait_queue_head_t	open_wait;	/* Open waiters */
@@ -208,6 +210,7 @@
 
 struct tty_struct {
 	int	magic;
+	struct kref kref;
 	struct tty_driver *driver;
 	const struct tty_operations *ops;
 	int index;
@@ -217,6 +220,7 @@
 	spinlock_t ctrl_lock;
 	/* Termios values are protected by the termios mutex */
 	struct ktermios *termios, *termios_locked;
+	struct termiox *termiox;	/* May be NULL for unsupported */
 	char name[64];
 	struct pid *pgrp;		/* Protected by ctrl lock */
 	struct pid *session;
@@ -310,6 +314,25 @@
 extern void console_init(void);
 extern int vcs_init(void);
 
+extern struct class *tty_class;
+
+/**
+ *	tty_kref_get		-	get a tty reference
+ *	@tty: tty device
+ *
+ *	Return a new reference to a tty object. The caller must hold
+ *	sufficient locks/counts to ensure that their existing reference cannot
+ *	go away
+ */
+
+extern inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
+{
+	if (tty)
+		kref_get(&tty->kref);
+	return tty;
+}
+extern void tty_kref_put(struct tty_struct *tty);
+
 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
 			      const char *routine);
 extern char *tty_name(struct tty_struct *tty, char *buf);
@@ -333,13 +356,15 @@
 extern void tty_unthrottle(struct tty_struct *tty);
 extern int tty_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
 						struct winsize *ws);
-
+extern void tty_shutdown(struct tty_struct *tty);
+extern void tty_free_termios(struct tty_struct *tty);
 extern int is_current_pgrp_orphaned(void);
 extern struct pid *tty_get_pgrp(struct tty_struct *tty);
 extern int is_ignored(int sig);
 extern int tty_signal(int sig, struct tty_struct *tty);
 extern void tty_hangup(struct tty_struct *tty);
 extern void tty_vhangup(struct tty_struct *tty);
+extern void tty_vhangup_self(void);
 extern void tty_unhangup(struct file *filp);
 extern int tty_hung_up_p(struct file *filp);
 extern void do_SAK(struct tty_struct *tty);
@@ -347,6 +372,9 @@
 extern void disassociate_ctty(int priv);
 extern void no_tty(void);
 extern void tty_flip_buffer_push(struct tty_struct *tty);
+extern void tty_buffer_free_all(struct tty_struct *tty);
+extern void tty_buffer_flush(struct tty_struct *tty);
+extern void tty_buffer_init(struct tty_struct *tty);
 extern speed_t tty_get_baud_rate(struct tty_struct *tty);
 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
@@ -372,6 +400,15 @@
 extern dev_t tty_devnum(struct tty_struct *tty);
 extern void proc_clear_tty(struct task_struct *p);
 extern struct tty_struct *get_current_tty(void);
+extern void tty_default_fops(struct file_operations *fops);
+extern struct tty_struct *alloc_tty_struct(void);
+extern void free_tty_struct(struct tty_struct *tty);
+extern void initialize_tty_struct(struct tty_struct *tty,
+		struct tty_driver *driver, int idx);
+extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
+								int first_ok);
+extern void tty_release_dev(struct file *filp);
+extern int tty_init_termios(struct tty_struct *tty);
 
 extern struct mutex tty_mutex;
 
@@ -382,6 +419,8 @@
 extern void tty_port_init(struct tty_port *port);
 extern int tty_port_alloc_xmit_buf(struct tty_port *port);
 extern void tty_port_free_xmit_buf(struct tty_port *port);
+extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
+extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
 
 extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
 extern int tty_unregister_ldisc(int disc);
@@ -427,7 +466,7 @@
 #endif
 
 /* tty_ioctl.c */
-extern int n_tty_ioctl(struct tty_struct *tty, struct file *file,
+extern int n_tty_ioctl_helper(struct tty_struct *tty, struct file *file,
 		       unsigned int cmd, unsigned long arg);
 
 /* serial.c */
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 16d2794..78416b9 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -7,6 +7,28 @@
  * defined; unless noted otherwise, they are optional, and can be
  * filled in with a null pointer.
  *
+ * struct tty_struct * (*lookup)(struct tty_driver *self, int idx)
+ *
+ *	Return the tty device corresponding to idx, NULL if there is not
+ *	one currently in use and an ERR_PTR value on error. Called under
+ *	tty_mutex (for now!)
+ *
+ *	Optional method. Default behaviour is to use the ttys array
+ *
+ * int (*install)(struct tty_driver *self, struct tty_struct *tty)
+ *
+ *	Install a new tty into the tty driver internal tables. Used in
+ *	conjunction with lookup and remove methods.
+ *
+ *	Optional method. Default behaviour is to use the ttys array
+ *
+ * void (*remove)(struct tty_driver *self, struct tty_struct *tty)
+ *
+ *	Remove a closed tty from the tty driver internal tables. Used in
+ *	conjunction with lookup and remove methods.
+ *
+ *	Optional method. Default behaviour is to use the ttys array
+ *
  * int  (*open)(struct tty_struct * tty, struct file * filp);
  *
  * 	This routine is called when a particular tty device is opened.
@@ -21,6 +43,11 @@
  *
  *	Required method.
  *
+ * void (*shutdown)(struct tty_struct * tty);
+ *
+ * 	This routine is called when a particular tty device is closed for
+ *	the last time freeing up the resources.
+ *
  * int (*write)(struct tty_struct * tty,
  * 		 const unsigned char *buf, int count);
  *
@@ -180,6 +207,14 @@
  *	not force errors here if they are not resizable objects (eg a serial
  *	line). See tty_do_resize() if you need to wrap the standard method
  *	in your own logic - the usual case.
+ *
+ * void (*set_termiox)(struct tty_struct *tty, struct termiox *new);
+ *
+ *	Called when the device receives a termiox based ioctl. Passes down
+ *	the requested data from user space. This method will not be invoked
+ *	unless the tty also has a valid tty->termiox pointer.
+ *
+ *	Optional: Called under the termios lock
  */
 
 #include <linux/fs.h>
@@ -190,8 +225,13 @@
 struct tty_driver;
 
 struct tty_operations {
+	struct tty_struct * (*lookup)(struct tty_driver *driver,
+			struct inode *inode, int idx);
+	int  (*install)(struct tty_driver *driver, struct tty_struct *tty);
+	void (*remove)(struct tty_driver *driver, struct tty_struct *tty);
 	int  (*open)(struct tty_struct * tty, struct file * filp);
 	void (*close)(struct tty_struct * tty, struct file * filp);
+	void (*shutdown)(struct tty_struct *tty);
 	int  (*write)(struct tty_struct * tty,
 		      const unsigned char *buf, int count);
 	int  (*put_char)(struct tty_struct *tty, unsigned char ch);
@@ -220,6 +260,7 @@
 			unsigned int set, unsigned int clear);
 	int (*resize)(struct tty_struct *tty, struct tty_struct *real_tty,
 				struct winsize *ws);
+	int (*set_termiox)(struct tty_struct *tty, struct termiox *tnew);
 #ifdef CONFIG_CONSOLE_POLL
 	int (*poll_init)(struct tty_driver *driver, int line, char *options);
 	int (*poll_get_char)(struct tty_driver *driver, int line);
@@ -229,6 +270,7 @@
 
 struct tty_driver {
 	int	magic;		/* magic number for this structure */
+	struct kref kref;	/* Reference management */
 	struct cdev cdev;
 	struct module	*owner;
 	const char	*driver_name;
@@ -242,7 +284,6 @@
 	short	subtype;	/* subtype of tty driver */
 	struct ktermios init_termios; /* Initial termios */
 	int	flags;		/* tty driver flags */
-	int	refcount;	/* for loadable tty drivers */
 	struct proc_dir_entry *proc_entry; /* /proc fs entry */
 	struct tty_driver *other; /* only used for the PTY driver */
 
@@ -264,12 +305,19 @@
 
 extern struct list_head tty_drivers;
 
-struct tty_driver *alloc_tty_driver(int lines);
-void put_tty_driver(struct tty_driver *driver);
-void tty_set_operations(struct tty_driver *driver,
+extern struct tty_driver *alloc_tty_driver(int lines);
+extern void put_tty_driver(struct tty_driver *driver);
+extern void tty_set_operations(struct tty_driver *driver,
 			const struct tty_operations *op);
 extern struct tty_driver *tty_find_polling_driver(char *name, int *line);
 
+extern void tty_driver_kref_put(struct tty_driver *driver);
+extern inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d)
+{
+	kref_get(&d->kref);
+	return d;
+}
+
 /* tty driver magic number */
 #define TTY_DRIVER_MAGIC		0x5402
 
diff --git a/include/linux/vt_kern.h b/include/linux/vt_kern.h
index 1cbd0a7..2f11134 100644
--- a/include/linux/vt_kern.h
+++ b/include/linux/vt_kern.h
@@ -96,7 +96,7 @@
 void reset_vc(struct vc_data *vc);
 extern int unbind_con_driver(const struct consw *csw, int first, int last,
 			     int deflt);
-int vty_init(void);
+int vty_init(const struct file_operations *console_fops);
 
 /*
  * vc_screen.c shares this temporary buffer with the console write code so that
diff --git a/kernel/acct.c b/kernel/acct.c
index dd68b90..f6006a6 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -548,7 +548,7 @@
 #endif
 
 	spin_lock_irq(&current->sighand->siglock);
-	tty = current->signal->tty;
+	tty = current->signal->tty;	/* Safe as we hold the siglock */
 	ac.ac_tty = tty ? old_encode_dev(tty_devnum(tty)) : 0;
 	ac.ac_utime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_utime)));
 	ac.ac_stime = encode_comp_t(jiffies_to_AHZ(cputime_to_jiffies(pacct->ac_stime)));
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 59cedfb..cf5bc2f 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -246,8 +246,8 @@
 	unsigned n;
 	if (unlikely(!ctx))
 		return 0;
-
 	n = ctx->major;
+
 	switch (audit_classify_syscall(ctx->arch, n)) {
 	case 0:	/* native */
 		if ((mask & AUDIT_PERM_WRITE) &&
@@ -1204,13 +1204,13 @@
 				 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
 				 context->return_code);
 
-	mutex_lock(&tty_mutex);
-	read_lock(&tasklist_lock);
+	spin_lock_irq(&tsk->sighand->siglock);
 	if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name)
 		tty = tsk->signal->tty->name;
 	else
 		tty = "(none)";
-	read_unlock(&tasklist_lock);
+	spin_unlock_irq(&tsk->sighand->siglock);
+
 	audit_log_format(ab,
 		  " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
 		  " ppid=%d pid=%d auid=%u uid=%u gid=%u"
@@ -1230,7 +1230,6 @@
 		  context->egid, context->sgid, context->fsgid, tty,
 		  tsk->sessionid);
 
-	mutex_unlock(&tty_mutex);
 
 	audit_log_task_info(ab, tsk);
 	if (context->filterkey) {
diff --git a/kernel/fork.c b/kernel/fork.c
index 7ce2ebe..30de644 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -802,6 +802,7 @@
 
 	sig->leader = 0;	/* session leadership doesn't inherit */
 	sig->tty_old_pgrp = NULL;
+	sig->tty = NULL;
 
 	sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
 	sig->gtime = cputime_zero;
@@ -838,6 +839,7 @@
 void __cleanup_signal(struct signal_struct *sig)
 {
 	exit_thread_group_keys(sig);
+	tty_kref_put(sig->tty);
 	kmem_cache_free(signal_cachep, sig);
 }
 
@@ -1227,7 +1229,8 @@
 				p->nsproxy->pid_ns->child_reaper = p;
 
 			p->signal->leader_pid = pid;
-			p->signal->tty = current->signal->tty;
+			tty_kref_put(p->signal->tty);
+			p->signal->tty = tty_kref_get(current->signal->tty);
 			set_task_pgrp(p, task_pgrp_nr(current));
 			set_task_session(p, task_session_nr(current));
 			attach_pid(p, PIDTYPE_PGID, task_pgrp(current));
diff --git a/kernel/printk.c b/kernel/printk.c
index b51b156..a430fd0 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1291,22 +1291,6 @@
 }
 late_initcall(disable_boot_consoles);
 
-/**
- * tty_write_message - write a message to a certain tty, not just the console.
- * @tty: the destination tty_struct
- * @msg: the message to write
- *
- * This is used for messages that need to be redirected to a specific tty.
- * We don't put it into the syslog queue right now maybe in the future if
- * really needed.
- */
-void tty_write_message(struct tty_struct *tty, char *msg)
-{
-	if (tty && tty->ops->write)
-		tty->ops->write(tty, msg, strlen(msg));
-	return;
-}
-
 #if defined CONFIG_PRINTK
 
 /*
diff --git a/kernel/sys.c b/kernel/sys.c
index 038a7bc..234d945 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1060,9 +1060,7 @@
 	group_leader->signal->leader = 1;
 	__set_special_pids(sid);
 
-	spin_lock(&group_leader->sighand->siglock);
-	group_leader->signal->tty = NULL;
-	spin_unlock(&group_leader->sighand->siglock);
+	proc_clear_tty(group_leader);
 
 	err = session;
 out:
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 4a7374c..4888139 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2121,7 +2121,6 @@
 	long j = -1;
 	int drop_tty = 0;
 
-	mutex_lock(&tty_mutex);
 	tty = get_current_tty();
 	if (tty) {
 		file_list_lock();
@@ -2139,8 +2138,8 @@
 			}
 		}
 		file_list_unlock();
+		tty_kref_put(tty);
 	}
-	mutex_unlock(&tty_mutex);
 	/* Reset controlling tty. */
 	if (drop_tty)
 		no_tty();