diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 6e92ba6..9141193 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -79,6 +79,7 @@
 			Documentation/scsi/.
 	SELINUX SELinux support is enabled.
 	SERIAL	Serial support is enabled.
+	SH	SuperH architecture is enabled.
 	SMP	The kernel is an SMP kernel.
 	SPARC	Sparc architecture is enabled.
 	SWSUSP	Software suspend is enabled.
@@ -485,7 +486,7 @@
 
 	dtc3181e=	[HW,SCSI]
 
-	earlyprintk=	[IA-32,X86-64]
+	earlyprintk=	[IA-32,X86-64,SH]
 			earlyprintk=vga
 			earlyprintk=serial[,ttySn[,baudrate]]
 
@@ -1784,7 +1785,7 @@
 	usbhid.mousepoll=
 			[USBHID] The interval which mice are to be polled at.
 
-	vdso=		[IA-32]
+	vdso=		[IA-32,SH]
 			vdso=1: enable VDSO (default)
 			vdso=0: disable VDSO mapping
 
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 9b0dd27..4ff55e6 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -45,6 +45,7 @@
 #include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/percpu.h>
+#include <linux/nmi.h>
 
 #include <linux/delay.h>
 #include <linux/mc146818rtc.h>
@@ -1278,8 +1279,9 @@
 
 int __cpuinit __cpu_up(unsigned int cpu)
 {
+	unsigned long flags;
 #ifdef CONFIG_HOTPLUG_CPU
-	int ret=0;
+	int ret = 0;
 
 	/*
 	 * We do warm boot only on cpus that had booted earlier
@@ -1297,23 +1299,25 @@
 	/* In case one didn't come up */
 	if (!cpu_isset(cpu, cpu_callin_map)) {
 		printk(KERN_DEBUG "skipping cpu%d, didn't come online\n", cpu);
-		local_irq_enable();
 		return -EIO;
 	}
 
-	local_irq_enable();
-
 	per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
 	/* Unleash the CPU! */
 	cpu_set(cpu, smp_commenced_mask);
 
 	/*
-	 * Check TSC synchronization with the AP:
+	 * Check TSC synchronization with the AP (keep irqs disabled
+	 * while doing so):
 	 */
+	local_irq_save(flags);
 	check_tsc_sync_source(cpu);
+	local_irq_restore(flags);
 
-	while (!cpu_isset(cpu, cpu_online_map))
+	while (!cpu_isset(cpu, cpu_online_map)) {
 		cpu_relax();
+		touch_nmi_watchdog();
+	}
 
 #ifdef CONFIG_X86_GENERICARCH
 	if (num_online_cpus() > 8 && genapic == &apic_default)
diff --git a/arch/sh/boards/renesas/r7780rp/Makefile b/arch/sh/boards/renesas/r7780rp/Makefile
index 3c93012..ed5f5a9 100644
--- a/arch/sh/boards/renesas/r7780rp/Makefile
+++ b/arch/sh/boards/renesas/r7780rp/Makefile
@@ -2,6 +2,6 @@
 # Makefile for the R7780RP-1 specific parts of the kernel
 #
 
-obj-y	 := setup.o io.o irq.o
+obj-y	 := setup.o irq.o
 
 obj-$(CONFIG_PUSH_SWITCH)	+= psw.o
diff --git a/arch/sh/boards/renesas/r7780rp/io.c b/arch/sh/boards/renesas/r7780rp/io.c
deleted file mode 100644
index f74d2ff..0000000
--- a/arch/sh/boards/renesas/r7780rp/io.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
- * Based largely on io_se.c.
- *
- * I/O routine for Renesas Solutions Highlander R7780RP-1
- *
- * Initial version only to support LAN access; some
- * placeholder code from io_r7780rp.c left in with the
- * expectation of later SuperIO and PCMCIA access.
- */
-#include <linux/pci.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/io.h>
-#include <asm/r7780rp.h>
-#include <asm/addrspace.h>
-
-static inline unsigned long port88796l(unsigned int port, int flag)
-{
-	unsigned long addr;
-
-	if (flag)
-		addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1);
-	else
-		addr = PA_AX88796L + ((port - AX88796L_IO_BASE) << 1) + 0x1000;
-
-	return addr;
-}
-
-#if defined(CONFIG_NE2000) || defined(CONFIG_NE2000_MODULE)
-#define CHECK_AX88796L_PORT(port) \
-  ((port >= AX88796L_IO_BASE) && (port < (AX88796L_IO_BASE+0x20)))
-#else
-#define CHECK_AX88796L_PORT(port) (0)
-#endif
-
-/*
- * General outline: remap really low stuff [eventually] to SuperIO,
- * stuff in PCI IO space (at or above window at pci.h:PCIBIOS_MIN_IO)
- * is mapped through the PCI IO window.  Stuff with high bits (PXSEG)
- * should be way beyond the window, and is used  w/o translation for
- * compatibility.
- */
-u8 r7780rp_inb(unsigned long port)
-{
-	if (CHECK_AX88796L_PORT(port))
-		return ctrl_inw(port88796l(port, 0)) & 0xff;
-	else if (is_pci_ioaddr(port))
-		return ctrl_inb(pci_ioaddr(port));
-
-	return ctrl_inw(port) & 0xff;
-}
-
-u8 r7780rp_inb_p(unsigned long port)
-{
-	u8 v;
-
-	if (CHECK_AX88796L_PORT(port))
-		v = ctrl_inw(port88796l(port, 0)) & 0xff;
-	else if (is_pci_ioaddr(port))
-		v = ctrl_inb(pci_ioaddr(port));
-	else
-		v = ctrl_inw(port) & 0xff;
-
-	ctrl_delay();
-
-	return v;
-}
-
-u16 r7780rp_inw(unsigned long port)
-{
-	if (is_pci_ioaddr(port))
-		return ctrl_inw(pci_ioaddr(port));
-
-	return ctrl_inw(port);
-}
-
-u32 r7780rp_inl(unsigned long port)
-{
-	if (is_pci_ioaddr(port))
-		return ctrl_inl(pci_ioaddr(port));
-
-	return ctrl_inl(port);
-}
-
-void r7780rp_outb(u8 value, unsigned long port)
-{
-	if (CHECK_AX88796L_PORT(port))
-		ctrl_outw(value, port88796l(port, 0));
-	else if (is_pci_ioaddr(port))
-		ctrl_outb(value, pci_ioaddr(port));
-	else
-		ctrl_outb(value, port);
-}
-
-void r7780rp_outb_p(u8 value, unsigned long port)
-{
-	if (CHECK_AX88796L_PORT(port))
-		ctrl_outw(value, port88796l(port, 0));
-	else if (is_pci_ioaddr(port))
-		ctrl_outb(value, pci_ioaddr(port));
-	else
-		ctrl_outb(value, port);
-
-	ctrl_delay();
-}
-
-void r7780rp_outw(u16 value, unsigned long port)
-{
-	if (is_pci_ioaddr(port))
-		ctrl_outw(value, pci_ioaddr(port));
-	else
-		ctrl_outw(value, port);
-}
-
-void r7780rp_outl(u32 value, unsigned long port)
-{
-	if (is_pci_ioaddr(port))
-		ctrl_outl(value, pci_ioaddr(port));
-	else
-		ctrl_outl(value, port);
-}
-
-void r7780rp_insb(unsigned long port, void *dst, unsigned long count)
-{
-	volatile u16 *p;
-	u8 *buf = dst;
-
-	if (CHECK_AX88796L_PORT(port)) {
-		p = (volatile u16 *)port88796l(port, 0);
-		while (count--)
-			*buf++ = *p & 0xff;
-	} else if (is_pci_ioaddr(port)) {
-		volatile u8 *bp = (volatile u8 *)pci_ioaddr(port);
-
-		while (count--)
-			*buf++ = *bp;
-	} else {
-		p = (volatile u16 *)port;
-		while (count--)
-			*buf++ = *p & 0xff;
-	}
-}
-
-void r7780rp_insw(unsigned long port, void *dst, unsigned long count)
-{
-	volatile u16 *p;
-	u16 *buf = dst;
-
-	if (CHECK_AX88796L_PORT(port))
-		p = (volatile u16 *)port88796l(port, 1);
-	else if (is_pci_ioaddr(port))
-		p = (volatile u16 *)pci_ioaddr(port);
-	else
-		p = (volatile u16 *)port;
-
-	while (count--)
-		*buf++ = *p;
-
-	flush_dcache_all();
-}
-
-void r7780rp_insl(unsigned long port, void *dst, unsigned long count)
-{
-	if (is_pci_ioaddr(port)) {
-		volatile u32 *p = (volatile u32 *)pci_ioaddr(port);
-		u32 *buf = dst;
-
-		while (count--)
-			*buf++ = *p;
-	}
-}
-
-void r7780rp_outsb(unsigned long port, const void *src, unsigned long count)
-{
-	volatile u16 *p;
-	const u8 *buf = src;
-
-	if (CHECK_AX88796L_PORT(port)) {
-		p = (volatile u16 *)port88796l(port, 0);
-		while (count--)
-			*p = *buf++;
-	} else if (is_pci_ioaddr(port)) {
-		volatile u8 *bp = (volatile u8 *)pci_ioaddr(port);
-
-		while (count--)
-			*bp = *buf++;
-	} else
-		while (count--)
-			ctrl_outb(*buf++, port);
-}
-
-void r7780rp_outsw(unsigned long port, const void *src, unsigned long count)
-{
-	volatile u16 *p;
-	const u16 *buf = src;
-
-	if (CHECK_AX88796L_PORT(port))
-		p = (volatile u16 *)port88796l(port, 1);
-	else if (is_pci_ioaddr(port))
-		p = (volatile u16 *)pci_ioaddr(port);
-	else
-		p = (volatile u16 *)port;
-
-	while (count--)
-		*p = *buf++;
-
-	flush_dcache_all();
-}
-
-void r7780rp_outsl(unsigned long port, const void *src, unsigned long count)
-{
-	const u32 *buf = src;
-	u32 *p;
-
-	if (is_pci_ioaddr(port))
-		p = (u32 *)pci_ioaddr(port);
-	else
-		p = (u32 *)port;
-
-	while (count--)
-		ctrl_outl(*buf++, (unsigned long)p);
-}
-
-void __iomem *r7780rp_ioport_map(unsigned long port, unsigned int size)
-{
-	if (CHECK_AX88796L_PORT(port))
-		return (void __iomem *)port88796l(port, size > 1);
-	else if (is_pci_ioaddr(port))
-		return (void __iomem *)pci_ioaddr(port);
-
-	return (void __iomem *)port;
-}
diff --git a/arch/sh/boards/renesas/r7780rp/setup.c b/arch/sh/boards/renesas/r7780rp/setup.c
index 0d74db9..2faba66 100644
--- a/arch/sh/boards/renesas/r7780rp/setup.c
+++ b/arch/sh/boards/renesas/r7780rp/setup.c
@@ -187,31 +187,7 @@
 struct sh_machine_vector mv_r7780rp __initmv = {
 	.mv_name		= "Highlander R7780RP-1",
 	.mv_setup		= r7780rp_setup,
-
 	.mv_nr_irqs		= 109,
-
-	.mv_inb			= r7780rp_inb,
-	.mv_inw			= r7780rp_inw,
-	.mv_inl			= r7780rp_inl,
-	.mv_outb		= r7780rp_outb,
-	.mv_outw		= r7780rp_outw,
-	.mv_outl		= r7780rp_outl,
-
-	.mv_inb_p		= r7780rp_inb_p,
-	.mv_inw_p		= r7780rp_inw,
-	.mv_inl_p		= r7780rp_inl,
-	.mv_outb_p		= r7780rp_outb_p,
-	.mv_outw_p		= r7780rp_outw,
-	.mv_outl_p		= r7780rp_outl,
-
-	.mv_insb		= r7780rp_insb,
-	.mv_insw		= r7780rp_insw,
-	.mv_insl		= r7780rp_insl,
-	.mv_outsb		= r7780rp_outsb,
-	.mv_outsw		= r7780rp_outsw,
-	.mv_outsl		= r7780rp_outsl,
-
-	.mv_ioport_map		= r7780rp_ioport_map,
 	.mv_init_irq		= init_r7780rp_IRQ,
 };
 ALIAS_MV(r7780rp)
diff --git a/arch/sh/boards/renesas/rts7751r2d/setup.c b/arch/sh/boards/renesas/rts7751r2d/setup.c
index 44b4208..593f26a 100644
--- a/arch/sh/boards/renesas/rts7751r2d/setup.c
+++ b/arch/sh/boards/renesas/rts7751r2d/setup.c
@@ -12,6 +12,7 @@
 #include <linux/platform_device.h>
 #include <linux/pata_platform.h>
 #include <linux/serial_8250.h>
+#include <linux/sm501.h>
 #include <linux/pm.h>
 #include <asm/machvec.h>
 #include <asm/rts7751r2d.h>
@@ -111,10 +112,35 @@
 	.resource	= heartbeat_resources,
 };
 
+static struct resource sm501_resources[] = {
+	[0]	= {
+		.start	= 0x10000000,
+		.end	= 0x13e00000 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1]	= {
+		.start	= 0x13e00000,
+		.end	= 0x13ffffff,
+		.flags	= IORESOURCE_MEM,
+	},
+	[2]	= {
+		.start	= 32,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device sm501_device = {
+	.name		= "sm501",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(sm501_resources),
+	.resource	= sm501_resources,
+};
+
 static struct platform_device *rts7751r2d_devices[] __initdata = {
 	&uart_device,
 	&heartbeat_device,
 	&cf_ide_device,
+	&sm501_device,
 };
 
 static int __init rts7751r2d_devices_setup(void)
diff --git a/arch/sh/configs/rts7751r2d_defconfig b/arch/sh/configs/rts7751r2d_defconfig
index db6a02d..a59bb78 100644
--- a/arch/sh/configs/rts7751r2d_defconfig
+++ b/arch/sh/configs/rts7751r2d_defconfig
@@ -1,14 +1,13 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.20
-# Thu Feb 15 17:17:29 2007
+# Linux kernel version: 2.6.21-rc1
+# Thu Mar  1 16:42:40 2007
 #
 CONFIG_SUPERH=y
 CONFIG_RWSEM_GENERIC_SPINLOCK=y
 CONFIG_GENERIC_FIND_NEXT_BIT=y
 CONFIG_GENERIC_HWEIGHT=y
 CONFIG_GENERIC_HARDIRQS=y
-CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
 CONFIG_GENERIC_IRQ_PROBE=y
 CONFIG_GENERIC_CALIBRATE_DELAY=y
 # CONFIG_GENERIC_TIME is not set
@@ -33,6 +32,7 @@
 CONFIG_SWAP=y
 CONFIG_SYSVIPC=y
 # CONFIG_IPC_NS is not set
+CONFIG_SYSVIPC_SYSCTL=y
 # CONFIG_POSIX_MQUEUE is not set
 # CONFIG_BSD_PROCESS_ACCT is not set
 # CONFIG_TASKSTATS is not set
@@ -119,7 +119,6 @@
 # CONFIG_SH_SHMIN is not set
 # CONFIG_SH_7206_SOLUTION_ENGINE is not set
 # CONFIG_SH_7619_SOLUTION_ENGINE is not set
-# CONFIG_SH_ASDAP310 is not set
 # CONFIG_SH_UNKNOWN is not set
 
 #
@@ -281,7 +280,7 @@
 CONFIG_BOOT_LINK_OFFSET=0x00800000
 # CONFIG_UBC_WAKEUP is not set
 CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="console=ttySC0,115200 root=/dev/sda1"
+CONFIG_CMDLINE="console=tty0 console=ttySC0,115200 root=/dev/sda1"
 
 #
 # Bus options
@@ -433,6 +432,7 @@
 #
 # Plug and Play support
 #
+# CONFIG_PNPACPI is not set
 
 #
 # Block devices
@@ -770,7 +770,26 @@
 #
 # Input device support
 #
-# CONFIG_INPUT is not set
+CONFIG_INPUT=y
+# CONFIG_INPUT_FF_MEMLESS is not set
+
+#
+# Userland interfaces
+#
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_JOYDEV is not set
+# CONFIG_INPUT_TSDEV is not set
+# CONFIG_INPUT_EVDEV is not set
+# CONFIG_INPUT_EVBUG is not set
+
+#
+# Input Device Drivers
+#
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_INPUT_JOYSTICK is not set
+# CONFIG_INPUT_TOUCHSCREEN is not set
+# CONFIG_INPUT_MISC is not set
 
 #
 # Hardware I/O ports
@@ -781,7 +800,10 @@
 #
 # Character devices
 #
-# CONFIG_VT is not set
+CONFIG_VT=y
+CONFIG_VT_CONSOLE=y
+CONFIG_HW_CONSOLE=y
+CONFIG_VT_HW_CONSOLE_BINDING=y
 # CONFIG_SERIAL_NONSTANDARD is not set
 
 #
@@ -857,6 +879,11 @@
 # CONFIG_HWMON_DEBUG_CHIP is not set
 
 #
+# Multifunction device drivers
+#
+CONFIG_MFD_SM501=y
+
+#
 # Multimedia devices
 #
 # CONFIG_VIDEO_DEV is not set
@@ -869,9 +896,66 @@
 #
 # Graphics support
 #
-CONFIG_FIRMWARE_EDID=y
-# CONFIG_FB is not set
 # CONFIG_BACKLIGHT_LCD_SUPPORT is not set
+CONFIG_FB=y
+# CONFIG_FIRMWARE_EDID is not set
+# CONFIG_FB_DDC is not set
+CONFIG_FB_CFB_FILLRECT=y
+CONFIG_FB_CFB_COPYAREA=y
+CONFIG_FB_CFB_IMAGEBLIT=y
+# CONFIG_FB_SVGALIB is not set
+# CONFIG_FB_MACMODES is not set
+# CONFIG_FB_BACKLIGHT is not set
+# CONFIG_FB_MODE_HELPERS is not set
+# CONFIG_FB_TILEBLITTING is not set
+
+#
+# Frambuffer hardware drivers
+#
+# CONFIG_FB_CIRRUS is not set
+# CONFIG_FB_PM2 is not set
+# CONFIG_FB_CYBER2000 is not set
+# CONFIG_FB_ASILIANT is not set
+# CONFIG_FB_IMSTT is not set
+# CONFIG_FB_EPSON1355 is not set
+# CONFIG_FB_S1D13XXX is not set
+# CONFIG_FB_NVIDIA is not set
+# CONFIG_FB_RIVA is not set
+# CONFIG_FB_MATROX is not set
+# CONFIG_FB_RADEON is not set
+# CONFIG_FB_ATY128 is not set
+# CONFIG_FB_ATY is not set
+# CONFIG_FB_S3 is not set
+# CONFIG_FB_SAVAGE is not set
+# CONFIG_FB_SIS is not set
+# CONFIG_FB_NEOMAGIC is not set
+# CONFIG_FB_KYRO is not set
+# CONFIG_FB_3DFX is not set
+# CONFIG_FB_VOODOO1 is not set
+# CONFIG_FB_TRIDENT is not set
+CONFIG_FB_SM501=y
+# CONFIG_FB_VIRTUAL is not set
+
+#
+# Console display driver support
+#
+CONFIG_DUMMY_CONSOLE=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
+# CONFIG_FONTS is not set
+CONFIG_FONT_8x8=y
+CONFIG_FONT_8x16=y
+
+#
+# Logo configuration
+#
+CONFIG_LOGO=y
+# CONFIG_LOGO_LINUX_MONO is not set
+# CONFIG_LOGO_LINUX_VGA16 is not set
+# CONFIG_LOGO_LINUX_CLUT224 is not set
+# CONFIG_LOGO_SUPERH_MONO is not set
+# CONFIG_LOGO_SUPERH_VGA16 is not set
+CONFIG_LOGO_SUPERH_CLUT224=y
 
 #
 # Sound
@@ -985,6 +1069,12 @@
 CONFIG_AC97_BUS=m
 
 #
+# HID Devices
+#
+CONFIG_HID=y
+# CONFIG_HID_DEBUG is not set
+
+#
 # USB support
 #
 CONFIG_USB_ARCH_HAS_HCD=y
@@ -1237,7 +1327,7 @@
 CONFIG_EARLY_SCIF_CONSOLE=y
 CONFIG_EARLY_SCIF_CONSOLE_PORT=0xffe80000
 CONFIG_EARLY_PRINTK=y
-# CONFIG_KGDB is not set
+# CONFIG_SH_KGDB is not set
 
 #
 # Security options
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index ab4ebb8..b467280 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -224,7 +224,7 @@
 syscall_exit_work:
 	! r0: current_thread_info->flags
 	! r8: current_thread_info
-	tst	#_TIF_SYSCALL_TRACE, r0
+	tst	#_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP, r0
 	bt/s	work_pending
 	 tst	#_TIF_NEED_RESCHED, r0
 #ifdef CONFIG_TRACE_IRQFLAGS
diff --git a/arch/sh/kernel/io_generic.c b/arch/sh/kernel/io_generic.c
index 66626c0..771ea42 100644
--- a/arch/sh/kernel/io_generic.c
+++ b/arch/sh/kernel/io_generic.c
@@ -14,7 +14,6 @@
 #include <linux/module.h>
 #include <linux/io.h>
 #include <asm/machvec.h>
-#include <asm/cacheflush.h>
 
 #ifdef CONFIG_CPU_SH3
 /* SH3 has a PCMCIA bug that needs a dummy read from area 6 for a
@@ -96,7 +95,6 @@
 	while (count--)
 		*buf++ = *port_addr;
 
-	flush_dcache_all();
 	dummy_read();
 }
 
@@ -171,7 +169,6 @@
 	while (count--)
 		*port_addr = *buf++;
 
-	flush_dcache_all();
 	dummy_read();
 }
 
diff --git a/arch/sh/kernel/process.c b/arch/sh/kernel/process.c
index 9d6a438..e760736 100644
--- a/arch/sh/kernel/process.c
+++ b/arch/sh/kernel/process.c
@@ -250,12 +250,11 @@
 		childregs->regs[15] = usp;
 		ti->addr_limit = USER_DS;
 	} else {
-		childregs->regs[15] = (unsigned long)task_stack_page(p) +
-							THREAD_SIZE;
+		childregs->regs[15] = (unsigned long)childregs;
 		ti->addr_limit = KERNEL_DS;
 	}
 
-        if (clone_flags & CLONE_SETTLS)
+	if (clone_flags & CLONE_SETTLS)
 		childregs->gbr = childregs->regs[0];
 
 	childregs->regs[0] = 0; /* Set return value for child */
diff --git a/arch/sh/kernel/ptrace.c b/arch/sh/kernel/ptrace.c
index 04ca13a..855f724 100644
--- a/arch/sh/kernel/ptrace.c
+++ b/arch/sh/kernel/ptrace.c
@@ -8,7 +8,6 @@
  * SuperH version:   Copyright (C) 1999, 2000  Kaz Kojima & Niibe Yutaka
  *
  */
-
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/mm.h>
@@ -20,8 +19,7 @@
 #include <linux/slab.h>
 #include <linux/security.h>
 #include <linux/signal.h>
-
-#include <asm/io.h>
+#include <linux/io.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/system.h>
@@ -59,6 +57,23 @@
 	return 0;
 }
 
+static void ptrace_disable_singlestep(struct task_struct *child)
+{
+	clear_tsk_thread_flag(child, TIF_SINGLESTEP);
+
+	/*
+	 * Ensure the UBC is not programmed at the next context switch.
+	 *
+	 * Normally this is not needed but there are sequences such as
+	 * singlestep, signal delivery, and continue that leave the
+	 * ubc_pc non-zero leading to spurious SIGTRAPs.
+	 */
+	if (child->thread.ubc_pc != 0) {
+		ubc_usercnt -= 1;
+		child->thread.ubc_pc = 0;
+	}
+}
+
 /*
  * Called by kernel/ptrace.c when detaching..
  *
@@ -66,7 +81,7 @@
  */
 void ptrace_disable(struct task_struct *child)
 {
-	/* nothing to do.. */
+	ptrace_disable_singlestep(child);
 }
 
 long arch_ptrace(struct task_struct *child, long request, long addr, long data)
@@ -76,7 +91,7 @@
 
 	switch (request) {
 	/* when I and D space are separate, these will need to be fixed. */
-	case PTRACE_PEEKTEXT: /* read word at location addr. */ 
+	case PTRACE_PEEKTEXT: /* read word at location addr. */
 	case PTRACE_PEEKDATA: {
 		unsigned long tmp;
 		int copied;
@@ -94,7 +109,7 @@
 		unsigned long tmp;
 
 		ret = -EIO;
-		if ((addr & 3) || addr < 0 || 
+		if ((addr & 3) || addr < 0 ||
 		    addr > sizeof(struct user) - 3)
 			break;
 
@@ -129,7 +144,7 @@
 
 	case PTRACE_POKEUSR: /* write the word at location addr in the USER area */
 		ret = -EIO;
-		if ((addr & 3) || addr < 0 || 
+		if ((addr & 3) || addr < 0 ||
 		    addr > sizeof(struct user) - 3)
 			break;
 
@@ -156,6 +171,9 @@
 			set_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
 		else
 			clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
+
+		ptrace_disable_singlestep(child);
+
 		child->exit_code = data;
 		wake_up_process(child);
 		ret = 0;
@@ -163,14 +181,15 @@
 	}
 
 /*
- * make the child exit.  Best I can do is send it a sigkill. 
- * perhaps it should be put in the status that it wants to 
+ * make the child exit.  Best I can do is send it a sigkill.
+ * perhaps it should be put in the status that it wants to
  * exit.
  */
 	case PTRACE_KILL: {
 		ret = 0;
 		if (child->exit_state == EXIT_ZOMBIE)	/* already dead */
 			break;
+		ptrace_disable_singlestep(child);
 		child->exit_code = SIGKILL;
 		wake_up_process(child);
 		break;
@@ -196,6 +215,7 @@
 			ubc_usercnt += 1;
 		child->thread.ubc_pc = pc;
 
+		set_tsk_thread_flag(child, TIF_SINGLESTEP);
 		child->exit_code = data;
 		/* give it a chance to run. */
 		wake_up_process(child);
@@ -248,14 +268,15 @@
 {
 	struct task_struct *tsk = current;
 
-	if (!test_thread_flag(TIF_SYSCALL_TRACE))
+	if (!test_thread_flag(TIF_SYSCALL_TRACE) &&
+	    !test_thread_flag(TIF_SINGLESTEP))
 		return;
 	if (!(tsk->ptrace & PT_PTRACED))
 		return;
 	/* the 0x80 provides a way for the tracing parent to distinguish
 	   between a syscall stop and SIGTRAP delivery */
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				 ? 0x80 : 0));
+	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD) &&
+				 !test_thread_flag(TIF_SINGLESTEP) ? 0x80 : 0));
 
 	/*
 	 * this isn't the same as continuing with a signal, but it will do
diff --git a/arch/sh/kernel/signal.c b/arch/sh/kernel/signal.c
index 32f10a0..9f39ef1 100644
--- a/arch/sh/kernel/signal.c
+++ b/arch/sh/kernel/signal.c
@@ -589,6 +589,8 @@
 			if (test_thread_flag(TIF_RESTORE_SIGMASK))
 				clear_thread_flag(TIF_RESTORE_SIGMASK);
 		}
+
+		return;
 	}
 
  no_signal:
@@ -598,7 +600,7 @@
 		if (regs->regs[0] == -ERESTARTNOHAND ||
 		    regs->regs[0] == -ERESTARTSYS ||
 		    regs->regs[0] == -ERESTARTNOINTR) {
-		    	regs->regs[0] = save_r0;
+			regs->regs[0] = save_r0;
 			regs->pc -= 2;
 		} else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
 			regs->pc -= 2;
diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S
index 75de165..78a6c09 100644
--- a/arch/sh/kernel/vmlinux.lds.S
+++ b/arch/sh/kernel/vmlinux.lds.S
@@ -3,6 +3,7 @@
  * Written by Niibe Yutaka
  */
 #include <asm/thread_info.h>
+#include <asm/cache.h>
 #include <asm-generic/vmlinux.lds.h>
 
 #ifdef CONFIG_CPU_LITTLE_ENDIAN
@@ -53,7 +54,7 @@
   . = ALIGN(PAGE_SIZE);
   .data.page_aligned : { *(.data.page_aligned) }
 
-  . = ALIGN(32);
+  . = ALIGN(L1_CACHE_BYTES);
   __per_cpu_start = .;
   .data.percpu : { *(.data.percpu) }
   __per_cpu_end = .;
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index e0cd4b7..981b040 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -237,20 +237,10 @@
 /*
  * Write back & invalidate the D-cache of the page.
  * (To avoid "alias" issues)
- *
- * This uses a lazy write-back on UP, which is explicitly
- * disabled on SMP.
  */
 void flush_dcache_page(struct page *page)
 {
-#ifndef CONFIG_SMP
-	struct address_space *mapping = page_mapping(page);
-
-	if (mapping && !mapping_mapped(mapping))
-		set_bit(PG_dcache_dirty, &page->flags);
-	else
-#endif
-	{
+	if (test_bit(PG_mapped, &page->flags)) {
 		unsigned long phys = PHYSADDR(page_address(page));
 		unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
 		int i, n;
diff --git a/arch/sh/mm/cache-sh7705.c b/arch/sh/mm/cache-sh7705.c
index 31f8deb..4896d73 100644
--- a/arch/sh/mm/cache-sh7705.c
+++ b/arch/sh/mm/cache-sh7705.c
@@ -3,11 +3,11 @@
  *
  * Copyright (C) 1999, 2000  Niibe Yutaka
  * Copyright (C) 2004  Alex Song
- * Copyright (C) 2006  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
+ *
  */
 #include <linux/init.h>
 #include <linux/mman.h>
@@ -51,6 +51,7 @@
 
 			if ((data & v) == v)
 				ctrl_outl(data & ~v, addr);
+
 		}
 
 		addrstart += current_cpu_data.dcache.way_incr;
@@ -127,11 +128,7 @@
  */
 void flush_dcache_page(struct page *page)
 {
-	struct address_space *mapping = page_mapping(page);
-
-	if (mapping && !mapping_mapped(mapping))
-		set_bit(PG_dcache_dirty, &page->flags);
-	else
+	if (test_bit(PG_mapped, &page->flags))
 		__flush_dcache_page(PHYSADDR(page_address(page)));
 }
 
diff --git a/arch/sh/mm/pg-sh4.c b/arch/sh/mm/pg-sh4.c
index 969efec..df69da9 100644
--- a/arch/sh/mm/pg-sh4.c
+++ b/arch/sh/mm/pg-sh4.c
@@ -23,6 +23,7 @@
  */
 void clear_user_page(void *to, unsigned long address, struct page *page)
 {
+	__set_bit(PG_mapped, &page->flags);
 	if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
 		clear_page(to);
 	else {
@@ -58,6 +59,7 @@
 void copy_user_page(void *to, void *from, unsigned long address,
 		    struct page *page)
 {
+	__set_bit(PG_mapped, &page->flags);
 	if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0)
 		copy_page(to, from);
 	else {
@@ -82,3 +84,23 @@
 		mutex_unlock(&p3map_mutex[(address & CACHE_ALIAS)>>12]);
 	}
 }
+
+/*
+ * For SH-4, we have our own implementation for ptep_get_and_clear
+ */
+inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+	pte_t pte = *ptep;
+
+	pte_clear(mm, addr, ptep);
+	if (!pte_not_present(pte)) {
+		unsigned long pfn = pte_pfn(pte);
+		if (pfn_valid(pfn)) {
+			struct page *page = pfn_to_page(pfn);
+			struct address_space *mapping = page_mapping(page);
+			if (!mapping || !mapping_writably_mapped(mapping))
+				__clear_bit(PG_mapped, &page->flags);
+		}
+	}
+	return pte;
+}
diff --git a/arch/sh/mm/pg-sh7705.c b/arch/sh/mm/pg-sh7705.c
index 887ab9d..a4b015f 100644
--- a/arch/sh/mm/pg-sh7705.c
+++ b/arch/sh/mm/pg-sh7705.c
@@ -7,7 +7,9 @@
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
+ *
  */
+
 #include <linux/init.h>
 #include <linux/mman.h>
 #include <linux/mm.h>
@@ -74,6 +76,7 @@
 {
 	struct page *page = virt_to_page(to);
 
+	__set_bit(PG_mapped, &page->flags);
 	if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
 		clear_page(to);
 		__flush_wback_region(to, PAGE_SIZE);
@@ -92,11 +95,12 @@
  * @from: P1 address
  * @address: U0 address to be mapped
  */
-void copy_user_page(void *to, void *from, unsigned long address,
-		    struct page *pg)
+void copy_user_page(void *to, void *from, unsigned long address, struct page *pg)
 {
 	struct page *page = virt_to_page(to);
 
+
+	__set_bit(PG_mapped, &page->flags);
 	if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
 		copy_page(to, from);
 		__flush_wback_region(to, PAGE_SIZE);
@@ -108,3 +112,26 @@
 		__flush_wback_region(to, PAGE_SIZE);
 	}
 }
+
+/*
+ * For SH7705, we have our own implementation for ptep_get_and_clear
+ * Copied from pg-sh4.c
+ */
+inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
+{
+	pte_t pte = *ptep;
+
+	pte_clear(mm, addr, ptep);
+	if (!pte_not_present(pte)) {
+		unsigned long pfn = pte_pfn(pte);
+		if (pfn_valid(pfn)) {
+			struct page *page = pfn_to_page(pfn);
+			struct address_space *mapping = page_mapping(page);
+			if (!mapping || !mapping_writably_mapped(mapping))
+				__clear_bit(PG_mapped, &page->flags);
+		}
+	}
+
+	return pte;
+}
+
diff --git a/arch/sh/mm/tlb-flush.c b/arch/sh/mm/tlb-flush.c
index d2f7b4a..6f45c1f 100644
--- a/arch/sh/mm/tlb-flush.c
+++ b/arch/sh/mm/tlb-flush.c
@@ -2,17 +2,15 @@
  * TLB flushing operations for SH with an MMU.
  *
  *  Copyright (C) 1999  Niibe Yutaka
- *  Copyright (C) 2003 - 2006  Paul Mundt
+ *  Copyright (C) 2003  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
 #include <linux/mm.h>
-#include <linux/io.h>
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
-#include <asm/cacheflush.h>
 
 void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
 {
@@ -140,54 +138,3 @@
 	ctrl_barrier();
 	local_irq_restore(flags);
 }
-
-void update_mmu_cache(struct vm_area_struct *vma,
-		      unsigned long address, pte_t pte)
-{
-	unsigned long flags;
-	unsigned long pteval;
-	unsigned long vpn;
-	struct page *page;
-	unsigned long pfn = pte_pfn(pte);
-	struct address_space *mapping;
-
-	if (!pfn_valid(pfn))
-		return;
-
-	page = pfn_to_page(pfn);
-	mapping = page_mapping(page);
-	if (mapping) {
-		unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
-		int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
-
-		if (dirty)
-			__flush_wback_region((void *)P1SEGADDR(phys),
-					     PAGE_SIZE);
-	}
-
-	local_irq_save(flags);
-
-	/* Set PTEH register */
-	vpn = (address & MMU_VPN_MASK) | get_asid();
-	ctrl_outl(vpn, MMU_PTEH);
-
-	pteval = pte_val(pte);
-
-#ifdef CONFIG_CPU_HAS_PTEA
-	/* Set PTEA register */
-	/* TODO: make this look less hacky */
-	ctrl_outl(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA);
-#endif
-
-	/* Set PTEL register */
-	pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
-#if defined(CONFIG_SH_WRITETHROUGH) && defined(CONFIG_CPU_SH4)
-	pteval |= _PAGE_WT;
-#endif
-	/* conveniently, we want all the software flags to be 0 anyway */
-	ctrl_outl(pteval, MMU_PTEL);
-
-	/* Load the TLB */
-	asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
-	local_irq_restore(flags);
-}
diff --git a/arch/sh/mm/tlb-sh3.c b/arch/sh/mm/tlb-sh3.c
index e5e76eb..7fbfd5a 100644
--- a/arch/sh/mm/tlb-sh3.c
+++ b/arch/sh/mm/tlb-sh3.c
@@ -8,9 +8,69 @@
  *
  * Released under the terms of the GNU GPL v2.0.
  */
-#include <linux/io.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+
 #include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+void update_mmu_cache(struct vm_area_struct * vma,
+		      unsigned long address, pte_t pte)
+{
+	unsigned long flags;
+	unsigned long pteval;
+	unsigned long vpn;
+
+	/* Ptrace may call this routine. */
+	if (vma && current->active_mm != vma->vm_mm)
+		return;
+
+#if defined(CONFIG_SH7705_CACHE_32KB)
+	{
+		struct page *page = pte_page(pte);
+		unsigned long pfn = pte_pfn(pte);
+
+		if (pfn_valid(pfn) && !test_bit(PG_mapped, &page->flags)) {
+			unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
+
+			__flush_wback_region((void *)P1SEGADDR(phys),
+					     PAGE_SIZE);
+			__set_bit(PG_mapped, &page->flags);
+		}
+	}
+#endif
+
+	local_irq_save(flags);
+
+	/* Set PTEH register */
+	vpn = (address & MMU_VPN_MASK) | get_asid();
+	ctrl_outl(vpn, MMU_PTEH);
+
+	pteval = pte_val(pte);
+
+	/* Set PTEL register */
+	pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
+	/* conveniently, we want all the software flags to be 0 anyway */
+	ctrl_outl(pteval, MMU_PTEL);
+
+	/* Load the TLB */
+	asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
+	local_irq_restore(flags);
+}
 
 void local_flush_tlb_one(unsigned long asid, unsigned long page)
 {
@@ -34,3 +94,4 @@
 	for (i = 0; i < ways; i++)
 		ctrl_outl(data, addr + (i << 8));
 }
+
diff --git a/arch/sh/mm/tlb-sh4.c b/arch/sh/mm/tlb-sh4.c
index 221e709..f74cf66 100644
--- a/arch/sh/mm/tlb-sh4.c
+++ b/arch/sh/mm/tlb-sh4.c
@@ -8,9 +8,74 @@
  *
  * Released under the terms of the GNU GPL v2.0.
  */
-#include <linux/io.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/interrupt.h>
+
 #include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+void update_mmu_cache(struct vm_area_struct * vma,
+		      unsigned long address, pte_t pte)
+{
+	unsigned long flags;
+	unsigned long pteval;
+	unsigned long vpn;
+	struct page *page;
+	unsigned long pfn;
+
+	/* Ptrace may call this routine. */
+	if (vma && current->active_mm != vma->vm_mm)
+		return;
+
+	pfn = pte_pfn(pte);
+	if (pfn_valid(pfn)) {
+		page = pfn_to_page(pfn);
+		if (!test_bit(PG_mapped, &page->flags)) {
+			unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
+			__flush_wback_region((void *)P1SEGADDR(phys), PAGE_SIZE);
+			__set_bit(PG_mapped, &page->flags);
+		}
+	}
+
+	local_irq_save(flags);
+
+	/* Set PTEH register */
+	vpn = (address & MMU_VPN_MASK) | get_asid();
+	ctrl_outl(vpn, MMU_PTEH);
+
+	pteval = pte_val(pte);
+
+	/* Set PTEA register */
+	if (cpu_data->flags & CPU_HAS_PTEA)
+		/* TODO: make this look less hacky */
+		ctrl_outl(((pteval >> 28) & 0xe) | (pteval & 0x1), MMU_PTEA);
+
+	/* Set PTEL register */
+	pteval &= _PAGE_FLAGS_HARDWARE_MASK; /* drop software flags */
+#ifdef CONFIG_SH_WRITETHROUGH
+	pteval |= _PAGE_WT;
+#endif
+	/* conveniently, we want all the software flags to be 0 anyway */
+	ctrl_outl(pteval, MMU_PTEL);
+
+	/* Load the TLB */
+	asm volatile("ldtlb": /* no output */ : /* no input */ : "memory");
+	local_irq_restore(flags);
+}
 
 void local_flush_tlb_one(unsigned long asid, unsigned long page)
 {
@@ -28,3 +93,4 @@
 	ctrl_outl(data, addr);
 	back_to_P1();
 }
+
diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 3544372..cd4643a 100644
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -923,8 +923,9 @@
  */
 int __cpuinit __cpu_up(unsigned int cpu)
 {
-	int err;
 	int apicid = cpu_present_to_apicid(cpu);
+	unsigned long flags;
+	int err;
 
 	WARN_ON(irqs_disabled());
 
@@ -958,7 +959,9 @@
 	/*
   	 * Make sure and check TSC sync:
  	 */
+	local_irq_save(flags);
 	check_tsc_sync_source(cpu);
+	local_irq_restore(flags);
 
 	while (!cpu_isset(cpu, cpu_online_map))
 		cpu_relax();
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index 40db61d..3870150 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -22,6 +22,7 @@
 #include "lockspace.h"
 #include "lock.h"
 #include "lvb_table.h"
+#include "user.h"
 
 static const char *name_prefix="dlm";
 static struct miscdevice ctl_device;
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 6618c11..12accb0 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -20,6 +20,7 @@
 #include <linux/list.h>
 #include <linux/lm_interface.h>
 #include <linux/wait.h>
+#include <linux/module.h>
 #include <linux/rwsem.h>
 #include <asm/uaccess.h>
 
@@ -953,9 +954,6 @@
 		spin_unlock(&gl->gl_spin);
 	}
 
-	if (glops->go_drop_bh)
-		glops->go_drop_bh(gl);
-
 	spin_lock(&gl->gl_spin);
 	gl->gl_req_gh = NULL;
 	gl->gl_req_bh = NULL;
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 46af553..39c8ae2 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -245,7 +245,6 @@
 
 	if (ip && S_ISREG(ip->i_inode.i_mode)) {
 		truncate_inode_pages(ip->i_inode.i_mapping, 0);
-		gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), !ip->i_inode.i_mapping->nrpages);
 		clear_bit(GIF_PAGED, &ip->i_flags);
 	}
 }
@@ -459,6 +458,8 @@
 };
 
 const struct gfs2_glock_operations gfs2_rgrp_glops = {
+	.go_xmote_th = meta_go_sync,
+	.go_drop_th = meta_go_sync,
 	.go_inval = meta_go_inval,
 	.go_demote_ok = rgrp_go_demote_ok,
 	.go_lock = rgrp_go_lock,
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 12c80fd..49f0dbf 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -104,7 +104,6 @@
 	void (*go_xmote_th) (struct gfs2_glock *gl);
 	void (*go_xmote_bh) (struct gfs2_glock *gl);
 	void (*go_drop_th) (struct gfs2_glock *gl);
-	void (*go_drop_bh) (struct gfs2_glock *gl);
 	void (*go_inval) (struct gfs2_glock *gl, int flags);
 	int (*go_demote_ok) (struct gfs2_glock *gl);
 	int (*go_lock) (struct gfs2_holder *gh);
@@ -416,7 +415,6 @@
 	unsigned int gt_stall_secs; /* Detects trouble! */
 	unsigned int gt_complain_secs;
 	unsigned int gt_reclaim_limit; /* Max num of glocks in reclaim list */
-	unsigned int gt_entries_per_readdir;
 	unsigned int gt_statfs_quantum;
 	unsigned int gt_statfs_slow;
 };
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 0d6831a..df0b8b3 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -43,7 +43,8 @@
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_inum_host *inum = opaque;
 
-	if (ip->i_num.no_addr == inum->no_addr)
+	if (ip->i_num.no_addr == inum->no_addr &&
+	    inode->i_private != NULL)
 		return 1;
 
 	return 0;
@@ -61,13 +62,13 @@
 
 struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum_host *inum)
 {
-	return ilookup5(sb, (unsigned long)inum->no_formal_ino,
+	return ilookup5(sb, (unsigned long)inum->no_addr,
 			iget_test, inum);
 }
 
 static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum_host *inum)
 {
-	return iget5_locked(sb, (unsigned long)inum->no_formal_ino,
+	return iget5_locked(sb, (unsigned long)inum->no_addr,
 		     iget_test, iget_set, inum);
 }
 
diff --git a/fs/gfs2/ops_address.c b/fs/gfs2/ops_address.c
index 56e3359..b3b7e84 100644
--- a/fs/gfs2/ops_address.c
+++ b/fs/gfs2/ops_address.c
@@ -266,9 +266,11 @@
 out:
 	return error;
 out_unlock:
-	if (error == GLR_TRYFAILED)
-		error = AOP_TRUNCATED_PAGE;
 	unlock_page(page);
+	if (error == GLR_TRYFAILED) {
+		error = AOP_TRUNCATED_PAGE;
+		yield();
+	}
 	if (do_unlock)
 		gfs2_holder_uninit(&gh);
 	goto out;
@@ -364,6 +366,7 @@
 		if (error == GLR_TRYFAILED) {
 			unlock_page(page);
 			error = AOP_TRUNCATED_PAGE;
+			yield();
 		}
 		goto out_uninit;
 	}
diff --git a/fs/gfs2/ops_export.c b/fs/gfs2/ops_export.c
index 1de05b6..aad9183 100644
--- a/fs/gfs2/ops_export.c
+++ b/fs/gfs2/ops_export.c
@@ -38,14 +38,11 @@
 	struct gfs2_fh_obj fh_obj;
 	struct gfs2_inum_host *this, parent;
 
-	if (fh_type != fh_len)
-		return NULL;
-
 	this 		= &fh_obj.this;
 	fh_obj.imode 	= DT_UNKNOWN;
 	memset(&parent, 0, sizeof(struct gfs2_inum));
 
-	switch (fh_type) {
+	switch (fh_len) {
 	case GFS2_LARGE_FH_SIZE:
 		parent.no_formal_ino = ((u64)be32_to_cpu(fh[4])) << 32;
 		parent.no_formal_ino |= be32_to_cpu(fh[5]);
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index ee80b8a..ee54cb6 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -840,7 +840,7 @@
 	}
 
 	printk(KERN_WARNING "GFS2: Unrecognized block device or "
-	       "mount point %s", dev_name);
+	       "mount point %s\n", dev_name);
 
 free_nd:
 	path_release(&nd);
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index d0db881..c186857 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -279,7 +279,7 @@
 		(bh->b_data + sizeof(struct gfs2_meta_header) +
 		 offset * sizeof(struct gfs2_quota_change));
 
-	mutex_lock(&sdp->sd_quota_mutex);
+	mutex_unlock(&sdp->sd_quota_mutex);
 
 	return 0;
 
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 70f424f..4fdda97 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -76,7 +76,6 @@
 	gt->gt_stall_secs = 600;
 	gt->gt_complain_secs = 10;
 	gt->gt_reclaim_limit = 5000;
-	gt->gt_entries_per_readdir = 32;
 	gt->gt_statfs_quantum = 30;
 	gt->gt_statfs_slow = 0;
 }
diff --git a/include/asm-sh/cache.h b/include/asm-sh/cache.h
index e3a180c..9a3cb6b 100644
--- a/include/asm-sh/cache.h
+++ b/include/asm-sh/cache.h
@@ -21,6 +21,7 @@
 
 #define L1_CACHE_ALIGN(x)	(((x)+(L1_CACHE_BYTES-1))&~(L1_CACHE_BYTES-1))
 
+#ifndef __ASSEMBLY__
 struct cache_info {
 	unsigned int ways;		/* Number of cache ways */
 	unsigned int sets;		/* Number of cache sets */
@@ -47,6 +48,6 @@
 
 	unsigned long flags;
 };
-
+#endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
 #endif /* __ASM_SH_CACHE_H */
diff --git a/include/asm-sh/cacheflush.h b/include/asm-sh/cacheflush.h
index 22f1263..07f62ec 100644
--- a/include/asm-sh/cacheflush.h
+++ b/include/asm-sh/cacheflush.h
@@ -30,8 +30,5 @@
 
 #define HAVE_ARCH_UNMAPPED_AREA
 
-/* Page flag for lazy dcache write-back for the aliasing UP caches */
-#define PG_dcache_dirty	PG_arch_1
-
 #endif /* __KERNEL__ */
 #endif /* __ASM_SH_CACHEFLUSH_H */
diff --git a/include/asm-sh/cpu-sh3/cacheflush.h b/include/asm-sh/cpu-sh3/cacheflush.h
index 6fabbba..f70d8ef7 100644
--- a/include/asm-sh/cpu-sh3/cacheflush.h
+++ b/include/asm-sh/cpu-sh3/cacheflush.h
@@ -36,6 +36,8 @@
  /* 32KB cache, 4kb PAGE sizes need to check bit 12 */
 #define CACHE_ALIAS 0x00001000
 
+#define PG_mapped	PG_arch_1
+
 void flush_cache_all(void);
 void flush_cache_mm(struct mm_struct *mm);
 #define flush_cache_dup_mm(mm) flush_cache_mm(mm)
diff --git a/include/asm-sh/cpu-sh4/cacheflush.h b/include/asm-sh/cpu-sh4/cacheflush.h
index b3746a9..5fd5c89 100644
--- a/include/asm-sh/cpu-sh4/cacheflush.h
+++ b/include/asm-sh/cpu-sh4/cacheflush.h
@@ -39,4 +39,6 @@
 /* Initialization of P3 area for copy_user_page */
 void p3_cache_init(void);
 
+#define PG_mapped	PG_arch_1
+
 #endif /* __ASM_CPU_SH4_CACHEFLUSH_H */
diff --git a/include/asm-sh/pgtable.h b/include/asm-sh/pgtable.h
index 9214c01..184d7fc 100644
--- a/include/asm-sh/pgtable.h
+++ b/include/asm-sh/pgtable.h
@@ -583,6 +583,11 @@
 extern unsigned int kobjsize(const void *objp);
 #endif /* !CONFIG_MMU */
 
+#if defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB)
+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
+extern pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
+#endif
+
 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
 extern void paging_init(void);
 
diff --git a/include/asm-sh/thread_info.h b/include/asm-sh/thread_info.h
index 279e70a..31d55e3 100644
--- a/include/asm-sh/thread_info.h
+++ b/include/asm-sh/thread_info.h
@@ -111,6 +111,7 @@
 #define TIF_SIGPENDING		2	/* signal pending */
 #define TIF_NEED_RESCHED	3	/* rescheduling necessary */
 #define TIF_RESTORE_SIGMASK	4	/* restore signal mask in do_signal() */
+#define TIF_SINGLESTEP		5	/* singlestepping active */
 #define TIF_USEDFPU		16	/* FPU was used by this task this quantum (SMP) */
 #define TIF_POLLING_NRFLAG	17	/* true if poll_idle() is polling TIF_NEED_RESCHED */
 #define TIF_MEMDIE		18
@@ -121,6 +122,7 @@
 #define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
 #define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
+#define _TIF_SINGLESTEP		(1<<TIF_SINGLESTEP)
 #define _TIF_USEDFPU		(1<<TIF_USEDFPU)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
 #define _TIF_FREEZE		(1<<TIF_FREEZE)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 34b2301..1b255df 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -846,7 +846,8 @@
 		.extra2		= &one_hundred,
 	},
 #endif
-#ifdef CONFIG_X86_32
+#if defined(CONFIG_X86_32) || \
+   (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
 	{
 		.ctl_name	= VM_VDSO_ENABLED,
 		.procname	= "vdso_enabled",