diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index ed21737..cd13e13 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -266,17 +266,6 @@
 	depends on !IA64_HP_SIM
 	default y
 
-config IA64_SGI_SN_XP
-	tristate "Support communication between SGI SSIs"
-	depends on IA64_GENERIC || IA64_SGI_SN2
-	select IA64_UNCACHED_ALLOCATOR
-	help
-	  An SGI machine can be divided into multiple Single System
-	  Images which act independently of each other and have
-	  hardware based memory protection from the others.  Enabling
-	  this feature will allow for direct communication between SSIs
-	  based on a network adapter and DMA messaging.
-
 config FORCE_MAX_ZONEORDER
 	int "MAX_ORDER (11 - 17)"  if !HUGETLB_PAGE
 	range 11 17  if !HUGETLB_PAGE
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
index 90ef338..f065093 100644
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -194,8 +194,8 @@
 			unw_init_running(kdump_cpu_freeze, NULL);
 		break;
 	case DIE_MCA_MONARCH_LEAVE:
-		/* die_register->signr indicate if MCA is recoverable */
-		if (kdump_on_fatal_mca && !args->signr) {
+		/* *(nd->data) indicate if MCA is recoverable */
+		if (kdump_on_fatal_mca && !(*(nd->data))) {
 			atomic_set(&kdump_in_progress, 1);
 			*(nd->monarch_cpu) = -1;
 			machine_kdump_on_init();
diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index b0be4a2..e49ad8c 100644
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -570,6 +570,7 @@
 	br.call.sptk.many rp=syscall_trace_leave // give parent a chance to catch return value
 .ret3:
 (pUStk)	cmp.eq.unc p6,p0=r0,r0			// p6 <- pUStk
+(pUStk)	rsm psr.i				// disable interrupts
 	br.cond.sptk .work_pending_syscall_end
 
 strace_error:
diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c
index e51bced..705176b 100644
--- a/arch/ia64/kernel/mca.c
+++ b/arch/ia64/kernel/mca.c
@@ -109,6 +109,20 @@
 # define IA64_MCA_DEBUG(fmt...)
 #endif
 
+#define NOTIFY_INIT(event, regs, arg, spin)				\
+do {									\
+	if ((notify_die((event), "INIT", (regs), (arg), 0, 0)		\
+			== NOTIFY_STOP) && ((spin) == 1))		\
+		ia64_mca_spin(__func__);				\
+} while (0)
+
+#define NOTIFY_MCA(event, regs, arg, spin)				\
+do {									\
+	if ((notify_die((event), "MCA", (regs), (arg), 0, 0)		\
+			== NOTIFY_STOP) && ((spin) == 1))		\
+		ia64_mca_spin(__func__);				\
+} while (0)
+
 /* Used by mca_asm.S */
 DEFINE_PER_CPU(u64, ia64_mca_data); /* == __per_cpu_mca[smp_processor_id()] */
 DEFINE_PER_CPU(u64, ia64_mca_per_cpu_pte); /* PTE to map per-CPU area */
@@ -766,9 +780,8 @@
 
 	/* Mask all interrupts */
 	local_irq_save(flags);
-	if (notify_die(DIE_MCA_RENDZVOUS_ENTER, "MCA", get_irq_regs(),
-		       (long)&nd, 0, 0) == NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+
+	NOTIFY_MCA(DIE_MCA_RENDZVOUS_ENTER, get_irq_regs(), (long)&nd, 1);
 
 	ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_DONE;
 	/* Register with the SAL monarch that the slave has
@@ -776,17 +789,13 @@
 	 */
 	ia64_sal_mc_rendez();
 
-	if (notify_die(DIE_MCA_RENDZVOUS_PROCESS, "MCA", get_irq_regs(),
-		       (long)&nd, 0, 0) == NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+	NOTIFY_MCA(DIE_MCA_RENDZVOUS_PROCESS, get_irq_regs(), (long)&nd, 1);
 
 	/* Wait for the monarch cpu to exit. */
 	while (monarch_cpu != -1)
 	       cpu_relax();	/* spin until monarch leaves */
 
-	if (notify_die(DIE_MCA_RENDZVOUS_LEAVE, "MCA", get_irq_regs(),
-		       (long)&nd, 0, 0) == NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+	NOTIFY_MCA(DIE_MCA_RENDZVOUS_LEAVE, get_irq_regs(), (long)&nd, 1);
 
 	ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
 	/* Enable all interrupts */
@@ -1256,7 +1265,7 @@
 	int recover, cpu = smp_processor_id();
 	struct task_struct *previous_current;
 	struct ia64_mca_notify_die nd =
-		{ .sos = sos, .monarch_cpu = &monarch_cpu };
+		{ .sos = sos, .monarch_cpu = &monarch_cpu, .data = &recover };
 	static atomic_t mca_count;
 	static cpumask_t mca_cpu;
 
@@ -1272,9 +1281,7 @@
 
 	previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
 
-	if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
-			== NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+	NOTIFY_MCA(DIE_MCA_MONARCH_ENTER, regs, (long)&nd, 1);
 
 	ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_CONCURRENT_MCA;
 	if (sos->monarch) {
@@ -1288,13 +1295,12 @@
 		 * does not work.
 		 */
 		ia64_mca_wakeup_all();
-		if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, (long)&nd, 0, 0)
-				== NOTIFY_STOP)
-			ia64_mca_spin(__func__);
 	} else {
 		while (cpu_isset(cpu, mca_cpu))
 			cpu_relax();	/* spin until monarch wakes us */
-        }
+	}
+
+	NOTIFY_MCA(DIE_MCA_MONARCH_PROCESS, regs, (long)&nd, 1);
 
 	/* Get the MCA error record and log it */
 	ia64_mca_log_sal_error_record(SAL_INFO_TYPE_MCA);
@@ -1320,9 +1326,7 @@
 		mca_insert_tr(0x2); /*Reload dynamic itrs*/
 	}
 
-	if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
-			== NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+	NOTIFY_MCA(DIE_MCA_MONARCH_LEAVE, regs, (long)&nd, 1);
 
 	if (atomic_dec_return(&mca_count) > 0) {
 		int i;
@@ -1643,7 +1647,7 @@
 	struct ia64_mca_notify_die nd =
 		{ .sos = sos, .monarch_cpu = &monarch_cpu };
 
-	(void) notify_die(DIE_INIT_ENTER, "INIT", regs, (long)&nd, 0, 0);
+	NOTIFY_INIT(DIE_INIT_ENTER, regs, (long)&nd, 0);
 
 	mprintk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n",
 		sos->proc_state_param, cpu, sos->monarch);
@@ -1680,17 +1684,15 @@
 		ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_INIT;
 		while (monarch_cpu == -1)
 		       cpu_relax();	/* spin until monarch enters */
-		if (notify_die(DIE_INIT_SLAVE_ENTER, "INIT", regs, (long)&nd, 0, 0)
-				== NOTIFY_STOP)
-			ia64_mca_spin(__func__);
-		if (notify_die(DIE_INIT_SLAVE_PROCESS, "INIT", regs, (long)&nd, 0, 0)
-				== NOTIFY_STOP)
-			ia64_mca_spin(__func__);
+
+		NOTIFY_INIT(DIE_INIT_SLAVE_ENTER, regs, (long)&nd, 1);
+		NOTIFY_INIT(DIE_INIT_SLAVE_PROCESS, regs, (long)&nd, 1);
+
 		while (monarch_cpu != -1)
 		       cpu_relax();	/* spin until monarch leaves */
-		if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, (long)&nd, 0, 0)
-				== NOTIFY_STOP)
-			ia64_mca_spin(__func__);
+
+		NOTIFY_INIT(DIE_INIT_SLAVE_LEAVE, regs, (long)&nd, 1);
+
 		mprintk("Slave on cpu %d returning to normal service.\n", cpu);
 		set_curr_task(cpu, previous_current);
 		ia64_mc_info.imi_rendez_checkin[cpu] = IA64_MCA_RENDEZ_CHECKIN_NOTDONE;
@@ -1699,9 +1701,7 @@
 	}
 
 	monarch_cpu = cpu;
-	if (notify_die(DIE_INIT_MONARCH_ENTER, "INIT", regs, (long)&nd, 0, 0)
-			== NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+	NOTIFY_INIT(DIE_INIT_MONARCH_ENTER, regs, (long)&nd, 1);
 
 	/*
 	 * Wait for a bit.  On some machines (e.g., HP's zx2000 and zx6000, INIT can be
@@ -1716,12 +1716,9 @@
 	 * to default_monarch_init_process() above and just print all the
 	 * tasks.
 	 */
-	if (notify_die(DIE_INIT_MONARCH_PROCESS, "INIT", regs, (long)&nd, 0, 0)
-			== NOTIFY_STOP)
-		ia64_mca_spin(__func__);
-	if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, (long)&nd, 0, 0)
-			== NOTIFY_STOP)
-		ia64_mca_spin(__func__);
+	NOTIFY_INIT(DIE_INIT_MONARCH_PROCESS, regs, (long)&nd, 1);
+	NOTIFY_INIT(DIE_INIT_MONARCH_LEAVE, regs, (long)&nd, 1);
+
 	mprintk("\nINIT dump complete.  Monarch on cpu %d returning to normal service.\n", cpu);
 	atomic_dec(&monarchs);
 	set_curr_task(cpu, previous_current);
@@ -1953,7 +1950,7 @@
 			printk(KERN_INFO "Increasing MCA rendezvous timeout from "
 				"%ld to %ld milliseconds\n", timeout, isrv.v0);
 			timeout = isrv.v0;
-			(void) notify_die(DIE_MCA_NEW_TIMEOUT, "MCA", NULL, timeout, 0, 0);
+			NOTIFY_MCA(DIE_MCA_NEW_TIMEOUT, NULL, timeout, 0);
 			continue;
 		}
 		printk(KERN_ERR "Failed to register rendezvous interrupt "
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index d1d24f4..c8e4037 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -5511,7 +5511,7 @@
 }
 
 static int
-pfm_do_interrupt_handler(int irq, void *arg, struct pt_regs *regs)
+pfm_do_interrupt_handler(void *arg, struct pt_regs *regs)
 {
 	struct task_struct *task;
 	pfm_context_t *ctx;
@@ -5591,7 +5591,7 @@
 
 		start_cycles = ia64_get_itc();
 
-		ret = pfm_do_interrupt_handler(irq, arg, regs);
+		ret = pfm_do_interrupt_handler(arg, regs);
 
 		total_cycles = ia64_get_itc();
 
diff --git a/arch/ia64/sn/kernel/Makefile b/arch/ia64/sn/kernel/Makefile
index 688a3c27..0591038 100644
--- a/arch/ia64/sn/kernel/Makefile
+++ b/arch/ia64/sn/kernel/Makefile
@@ -4,7 +4,7 @@
 # License.  See the file "COPYING" in the main directory of this archive
 # for more details.
 #
-# Copyright (C) 1999,2001-2006 Silicon Graphics, Inc.  All Rights Reserved.
+# Copyright (C) 1999,2001-2006,2008 Silicon Graphics, Inc.  All Rights Reserved.
 #
 
 EXTRA_CFLAGS += -Iarch/ia64/sn/include
@@ -15,9 +15,4 @@
 				   sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
 obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o
-obj-$(CONFIG_IA64_SGI_SN_XP)	+= xp.o
-xp-y				:= xp_main.o xp_nofault.o
-obj-$(CONFIG_IA64_SGI_SN_XP)	+= xpc.o
-xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o
-obj-$(CONFIG_IA64_SGI_SN_XP)	+= xpnet.o
 obj-$(CONFIG_PCI_MSI)		+= msi_sn.o
diff --git a/arch/ia64/sn/kernel/huberror.c b/arch/ia64/sn/kernel/huberror.c
index 0101c79..08b0d9b 100644
--- a/arch/ia64/sn/kernel/huberror.c
+++ b/arch/ia64/sn/kernel/huberror.c
@@ -187,8 +187,8 @@
 {
 
 	if (request_irq(SGI_II_ERROR, hub_eint_handler, IRQF_SHARED,
-			"SN_hub_error", (void *)hubdev_info)) {
-		printk("hub_error_init: Failed to request_irq for 0x%p\n",
+			"SN_hub_error", hubdev_info)) {
+		printk(KERN_ERR "hub_error_init: Failed to request_irq for 0x%p\n",
 		    hubdev_info);
 		return;
 	}
diff --git a/arch/ia64/sn/pci/tioce_provider.c b/arch/ia64/sn/pci/tioce_provider.c
index 9b3c113..94e5845 100644
--- a/arch/ia64/sn/pci/tioce_provider.c
+++ b/arch/ia64/sn/pci/tioce_provider.c
@@ -655,7 +655,8 @@
  *
  * Simply call tioce_do_dma_map() to create a map with the barrier bit set
  * in the address.
- */ static u64
+ */
+static u64
 tioce_dma_consistent(struct pci_dev *pdev, u64 paddr, size_t byte_count, int dma_flags)
 {
 	return tioce_do_dma_map(pdev, paddr, byte_count, 1, dma_flags);
@@ -668,7 +669,8 @@
  *
  * Handle a CE error interrupt.  Simply a wrapper around a SAL call which
  * defers processing to the SGI prom.
- */ static irqreturn_t
+ */
+static irqreturn_t
 tioce_error_intr_handler(int irq, void *arg)
 {
 	struct tioce_common *soft = arg;
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index bb94ce7..297a48f 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -360,4 +360,16 @@
 	  driver (SCSI/ATA) which supports enclosures
 	  or a SCSI enclosure device (SES) to use these services.
 
+config SGI_XP
+	tristate "Support communication between SGI SSIs"
+	depends on IA64_GENERIC || IA64_SGI_SN2
+	select IA64_UNCACHED_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	select GENERIC_ALLOCATOR if IA64_GENERIC || IA64_SGI_SN2
+	---help---
+	  An SGI machine can be divided into multiple Single System
+	  Images which act independently of each other and have
+	  hardware based memory protection from the others.  Enabling
+	  this feature will allow for direct communication between SSIs
+	  based on a network adapter and DMA messaging.
+
 endif # MISC_DEVICES
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 4581b25..5914da4 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -24,3 +24,4 @@
 obj-$(CONFIG_INTEL_MENLOW)	+= intel_menlow.o
 obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o
 obj-$(CONFIG_KGDB_TESTS)	+= kgdbts.o
+obj-$(CONFIG_SGI_XP)		+= sgi-xp/
diff --git a/drivers/misc/sgi-xp/Makefile b/drivers/misc/sgi-xp/Makefile
new file mode 100644
index 0000000..b6e40a7
--- /dev/null
+++ b/drivers/misc/sgi-xp/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for SGI's XP devices.
+#
+
+obj-$(CONFIG_SGI_XP)		+= xp.o
+xp-y				:= xp_main.o xp_nofault.o
+
+obj-$(CONFIG_SGI_XP)		+= xpc.o
+xpc-y				:= xpc_main.o xpc_channel.o xpc_partition.o
+
+obj-$(CONFIG_SGI_XP)		+= xpnet.o
diff --git a/include/asm-ia64/sn/xp.h b/drivers/misc/sgi-xp/xp.h
similarity index 91%
rename from include/asm-ia64/sn/xp.h
rename to drivers/misc/sgi-xp/xp.h
index f7711b3..5515234 100644
--- a/include/asm-ia64/sn/xp.h
+++ b/drivers/misc/sgi-xp/xp.h
@@ -3,18 +3,15 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2004-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Silicon Graphics, Inc. All rights reserved.
  */
 
-
 /*
  * External Cross Partition (XP) structures and defines.
  */
 
-
-#ifndef _ASM_IA64_SN_XP_H
-#define _ASM_IA64_SN_XP_H
-
+#ifndef _DRIVERS_MISC_SGIXP_XP_H
+#define _DRIVERS_MISC_SGIXP_XP_H
 
 #include <linux/cache.h>
 #include <linux/hardirq.h>
@@ -22,14 +19,12 @@
 #include <asm/sn/types.h>
 #include <asm/sn/bte.h>
 
-
 #ifdef USE_DBUG_ON
 #define DBUG_ON(condition)	BUG_ON(condition)
 #else
 #define DBUG_ON(condition)
 #endif
 
-
 /*
  * Define the maximum number of logically defined partitions the system
  * can support. It is constrained by the maximum number of hardware
@@ -43,7 +38,6 @@
  */
 #define XP_MAX_PARTITIONS	64
 
-
 /*
  * Define the number of u64s required to represent all the C-brick nasids
  * as a bitmap.  The cross-partition kernel modules deal only with
@@ -54,7 +48,6 @@
 #define XP_NASID_MASK_BYTES	((XP_MAX_PHYSNODE_ID + 7) / 8)
 #define XP_NASID_MASK_WORDS	((XP_MAX_PHYSNODE_ID + 63) / 64)
 
-
 /*
  * Wrapper for bte_copy() that should it return a failure status will retry
  * the bte_copy() once in the hope that the failure was due to a temporary
@@ -74,7 +67,6 @@
 	bte_result_t ret;
 	u64 pdst = ia64_tpa(vdst);
 
-
 	/*
 	 * Ensure that the physically mapped memory is contiguous.
 	 *
@@ -87,16 +79,15 @@
 
 	ret = bte_copy(src, pdst, len, mode, notification);
 	if ((ret != BTE_SUCCESS) && BTE_ERROR_RETRY(ret)) {
-		if (!in_interrupt()) {
+		if (!in_interrupt())
 			cond_resched();
-		}
+
 		ret = bte_copy(src, pdst, len, mode, notification);
 	}
 
 	return ret;
 }
 
-
 /*
  * XPC establishes channel connections between the local partition and any
  * other partition that is currently up. Over these channels, kernel-level
@@ -122,7 +113,6 @@
 #error	XPC_NCHANNELS exceeds MAXIMUM allowed.
 #endif
 
-
 /*
  * The format of an XPC message is as follows:
  *
@@ -160,12 +150,10 @@
 	u64 payload;		/* user defined portion of message */
 };
 
-
 #define XPC_MSG_PAYLOAD_OFFSET	(u64) (&((struct xpc_msg *)0)->payload)
 #define XPC_MSG_SIZE(_payload_size) \
 		L1_CACHE_ALIGN(XPC_MSG_PAYLOAD_OFFSET + (_payload_size))
 
-
 /*
  * Define the return values and values passed to user's callout functions.
  * (It is important to add new value codes at the end just preceding
@@ -267,10 +255,9 @@
 				/* 115: BTE end */
 	xpcBteSh2End = xpcBteSh2Start + BTEFAIL_SH2_ALL,
 
-	xpcUnknownReason	/* 116: unknown reason -- must be last in list */
+	xpcUnknownReason	/* 116: unknown reason - must be last in enum */
 };
 
-
 /*
  * Define the callout function types used by XPC to update the user on
  * connection activity and state changes (via the user function registered by
@@ -375,12 +362,11 @@
  * =====================+================================+=====================
  */
 
-typedef void (*xpc_channel_func)(enum xpc_retval reason, partid_t partid,
-		int ch_number, void *data, void *key);
+typedef void (*xpc_channel_func) (enum xpc_retval reason, partid_t partid,
+				  int ch_number, void *data, void *key);
 
-typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
-		int ch_number, void *key);
-
+typedef void (*xpc_notify_func) (enum xpc_retval reason, partid_t partid,
+				 int ch_number, void *key);
 
 /*
  * The following is a registration entry. There is a global array of these,
@@ -398,50 +384,45 @@
  */
 struct xpc_registration {
 	struct mutex mutex;
-	xpc_channel_func func;		/* function to call */
-	void *key;			/* pointer to user's key */
-	u16 nentries;			/* #of msg entries in local msg queue */
-	u16 msg_size;			/* message queue's message size */
-	u32 assigned_limit;		/* limit on #of assigned kthreads */
-	u32 idle_limit;			/* limit on #of idle kthreads */
+	xpc_channel_func func;	/* function to call */
+	void *key;		/* pointer to user's key */
+	u16 nentries;		/* #of msg entries in local msg queue */
+	u16 msg_size;		/* message queue's message size */
+	u32 assigned_limit;	/* limit on #of assigned kthreads */
+	u32 idle_limit;		/* limit on #of idle kthreads */
 } ____cacheline_aligned;
 
-
 #define XPC_CHANNEL_REGISTERED(_c)	(xpc_registrations[_c].func != NULL)
 
-
 /* the following are valid xpc_allocate() flags */
-#define XPC_WAIT	0		/* wait flag */
-#define XPC_NOWAIT	1		/* no wait flag */
-
+#define XPC_WAIT	0	/* wait flag */
+#define XPC_NOWAIT	1	/* no wait flag */
 
 struct xpc_interface {
-	void (*connect)(int);
-	void (*disconnect)(int);
-	enum xpc_retval (*allocate)(partid_t, int, u32, void **);
-	enum xpc_retval (*send)(partid_t, int, void *);
-	enum xpc_retval (*send_notify)(partid_t, int, void *,
-						xpc_notify_func, void *);
-	void (*received)(partid_t, int, void *);
-	enum xpc_retval (*partid_to_nasids)(partid_t, void *);
+	void (*connect) (int);
+	void (*disconnect) (int);
+	enum xpc_retval (*allocate) (partid_t, int, u32, void **);
+	enum xpc_retval (*send) (partid_t, int, void *);
+	enum xpc_retval (*send_notify) (partid_t, int, void *,
+					xpc_notify_func, void *);
+	void (*received) (partid_t, int, void *);
+	enum xpc_retval (*partid_to_nasids) (partid_t, void *);
 };
 
-
 extern struct xpc_interface xpc_interface;
 
 extern void xpc_set_interface(void (*)(int),
-		void (*)(int),
-		enum xpc_retval (*)(partid_t, int, u32, void **),
-		enum xpc_retval (*)(partid_t, int, void *),
-		enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func,
-								void *),
-		void (*)(partid_t, int, void *),
-		enum xpc_retval (*)(partid_t, void *));
+			      void (*)(int),
+			      enum xpc_retval (*)(partid_t, int, u32, void **),
+			      enum xpc_retval (*)(partid_t, int, void *),
+			      enum xpc_retval (*)(partid_t, int, void *,
+						  xpc_notify_func, void *),
+			      void (*)(partid_t, int, void *),
+			      enum xpc_retval (*)(partid_t, void *));
 extern void xpc_clear_interface(void);
 
-
 extern enum xpc_retval xpc_connect(int, xpc_channel_func, void *, u16,
-						u16, u32, u32);
+				   u16, u32, u32);
 extern void xpc_disconnect(int);
 
 static inline enum xpc_retval
@@ -458,7 +439,7 @@
 
 static inline enum xpc_retval
 xpc_send_notify(partid_t partid, int ch_number, void *payload,
-			xpc_notify_func func, void *key)
+		xpc_notify_func func, void *key)
 {
 	return xpc_interface.send_notify(partid, ch_number, payload, func, key);
 }
@@ -475,11 +456,8 @@
 	return xpc_interface.partid_to_nasids(partid, nasids);
 }
 
-
 extern u64 xp_nofault_PIOR_target;
 extern int xp_nofault_PIOR(void *);
 extern int xp_error_PIOR(void);
 
-
-#endif /* _ASM_IA64_SN_XP_H */
-
+#endif /* _DRIVERS_MISC_SGIXP_XP_H */
diff --git a/arch/ia64/sn/kernel/xp_main.c b/drivers/misc/sgi-xp/xp_main.c
similarity index 69%
rename from arch/ia64/sn/kernel/xp_main.c
rename to drivers/misc/sgi-xp/xp_main.c
index b7ea466..1fbf99b 100644
--- a/arch/ia64/sn/kernel/xp_main.c
+++ b/drivers/misc/sgi-xp/xp_main.c
@@ -3,10 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
-
 /*
  * Cross Partition (XP) base.
  *
@@ -15,58 +14,64 @@
  *
  */
 
-
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <asm/sn/intr.h>
 #include <asm/sn/sn_sal.h>
-#include <asm/sn/xp.h>
-
+#include "xp.h"
 
 /*
- * Target of nofault PIO read.
+ * The export of xp_nofault_PIOR needs to happen here since it is defined
+ * in drivers/misc/sgi-xp/xp_nofault.S. The target of the nofault read is
+ * defined here.
  */
-u64 xp_nofault_PIOR_target;
+EXPORT_SYMBOL_GPL(xp_nofault_PIOR);
 
+u64 xp_nofault_PIOR_target;
+EXPORT_SYMBOL_GPL(xp_nofault_PIOR_target);
 
 /*
  * xpc_registrations[] keeps track of xpc_connect()'s done by the kernel-level
  * users of XPC.
  */
 struct xpc_registration xpc_registrations[XPC_NCHANNELS];
-
+EXPORT_SYMBOL_GPL(xpc_registrations);
 
 /*
  * Initialize the XPC interface to indicate that XPC isn't loaded.
  */
-static enum xpc_retval xpc_notloaded(void) { return xpcNotLoaded; }
+static enum xpc_retval
+xpc_notloaded(void)
+{
+	return xpcNotLoaded;
+}
 
 struct xpc_interface xpc_interface = {
-	(void (*)(int)) xpc_notloaded,
-	(void (*)(int)) xpc_notloaded,
-	(enum xpc_retval (*)(partid_t, int, u32, void **)) xpc_notloaded,
-	(enum xpc_retval (*)(partid_t, int, void *)) xpc_notloaded,
-	(enum xpc_retval (*)(partid_t, int, void *, xpc_notify_func, void *))
-							xpc_notloaded,
-	(void (*)(partid_t, int, void *)) xpc_notloaded,
-	(enum xpc_retval (*)(partid_t, void *)) xpc_notloaded
+	(void (*)(int))xpc_notloaded,
+	(void (*)(int))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, int, u32, void **))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, int, void *))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, int, void *, xpc_notify_func, void *))
+	    xpc_notloaded,
+	(void (*)(partid_t, int, void *))xpc_notloaded,
+	(enum xpc_retval(*)(partid_t, void *))xpc_notloaded
 };
-
+EXPORT_SYMBOL_GPL(xpc_interface);
 
 /*
  * XPC calls this when it (the XPC module) has been loaded.
  */
 void
-xpc_set_interface(void (*connect)(int),
-		void (*disconnect)(int),
-		enum xpc_retval (*allocate)(partid_t, int, u32, void **),
-		enum xpc_retval (*send)(partid_t, int, void *),
-		enum xpc_retval (*send_notify)(partid_t, int, void *,
-						xpc_notify_func, void *),
-		void (*received)(partid_t, int, void *),
-		enum xpc_retval (*partid_to_nasids)(partid_t, void *))
+xpc_set_interface(void (*connect) (int),
+		  void (*disconnect) (int),
+		  enum xpc_retval (*allocate) (partid_t, int, u32, void **),
+		  enum xpc_retval (*send) (partid_t, int, void *),
+		  enum xpc_retval (*send_notify) (partid_t, int, void *,
+						  xpc_notify_func, void *),
+		  void (*received) (partid_t, int, void *),
+		  enum xpc_retval (*partid_to_nasids) (partid_t, void *))
 {
 	xpc_interface.connect = connect;
 	xpc_interface.disconnect = disconnect;
@@ -76,7 +81,7 @@
 	xpc_interface.received = received;
 	xpc_interface.partid_to_nasids = partid_to_nasids;
 }
-
+EXPORT_SYMBOL_GPL(xpc_set_interface);
 
 /*
  * XPC calls this when it (the XPC module) is being unloaded.
@@ -84,20 +89,21 @@
 void
 xpc_clear_interface(void)
 {
-	xpc_interface.connect = (void (*)(int)) xpc_notloaded;
-	xpc_interface.disconnect = (void (*)(int)) xpc_notloaded;
-	xpc_interface.allocate = (enum xpc_retval (*)(partid_t, int, u32,
-					void **)) xpc_notloaded;
-	xpc_interface.send = (enum xpc_retval (*)(partid_t, int, void *))
-					xpc_notloaded;
-	xpc_interface.send_notify = (enum xpc_retval (*)(partid_t, int, void *,
-				    xpc_notify_func, void *)) xpc_notloaded;
+	xpc_interface.connect = (void (*)(int))xpc_notloaded;
+	xpc_interface.disconnect = (void (*)(int))xpc_notloaded;
+	xpc_interface.allocate = (enum xpc_retval(*)(partid_t, int, u32,
+						     void **))xpc_notloaded;
+	xpc_interface.send = (enum xpc_retval(*)(partid_t, int, void *))
+	    xpc_notloaded;
+	xpc_interface.send_notify = (enum xpc_retval(*)(partid_t, int, void *,
+							xpc_notify_func,
+							void *))xpc_notloaded;
 	xpc_interface.received = (void (*)(partid_t, int, void *))
-					xpc_notloaded;
-	xpc_interface.partid_to_nasids = (enum xpc_retval (*)(partid_t, void *))
-					xpc_notloaded;
+	    xpc_notloaded;
+	xpc_interface.partid_to_nasids = (enum xpc_retval(*)(partid_t, void *))
+	    xpc_notloaded;
 }
-
+EXPORT_SYMBOL_GPL(xpc_clear_interface);
 
 /*
  * Register for automatic establishment of a channel connection whenever
@@ -125,11 +131,10 @@
  */
 enum xpc_retval
 xpc_connect(int ch_number, xpc_channel_func func, void *key, u16 payload_size,
-		u16 nentries, u32 assigned_limit, u32 idle_limit)
+	    u16 nentries, u32 assigned_limit, u32 idle_limit)
 {
 	struct xpc_registration *registration;
 
-
 	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
 	DBUG_ON(payload_size == 0 || nentries == 0);
 	DBUG_ON(func == NULL);
@@ -137,9 +142,8 @@
 
 	registration = &xpc_registrations[ch_number];
 
-	if (mutex_lock_interruptible(&registration->mutex) != 0) {
+	if (mutex_lock_interruptible(&registration->mutex) != 0)
 		return xpcInterrupted;
-	}
 
 	/* if XPC_CHANNEL_REGISTERED(ch_number) */
 	if (registration->func != NULL) {
@@ -161,7 +165,7 @@
 
 	return xpcSuccess;
 }
-
+EXPORT_SYMBOL_GPL(xpc_connect);
 
 /*
  * Remove the registration for automatic connection of the specified channel
@@ -181,7 +185,6 @@
 {
 	struct xpc_registration *registration;
 
-
 	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
 
 	registration = &xpc_registrations[ch_number];
@@ -213,19 +216,17 @@
 
 	return;
 }
-
+EXPORT_SYMBOL_GPL(xpc_disconnect);
 
 int __init
 xp_init(void)
 {
 	int ret, ch_number;
-	u64 func_addr = *(u64 *) xp_nofault_PIOR;
-	u64 err_func_addr = *(u64 *) xp_error_PIOR;
+	u64 func_addr = *(u64 *)xp_nofault_PIOR;
+	u64 err_func_addr = *(u64 *)xp_error_PIOR;
 
-
-	if (!ia64_platform_is("sn2")) {
+	if (!ia64_platform_is("sn2"))
 		return -ENODEV;
-	}
 
 	/*
 	 * Register a nofault code region which performs a cross-partition
@@ -236,55 +237,43 @@
 	 * least some CPUs on Shubs <= v1.2, which unfortunately we have to
 	 * work around).
 	 */
-	if ((ret = sn_register_nofault_code(func_addr, err_func_addr,
-						err_func_addr, 1, 1)) != 0) {
+	ret = sn_register_nofault_code(func_addr, err_func_addr, err_func_addr,
+				       1, 1);
+	if (ret != 0) {
 		printk(KERN_ERR "XP: can't register nofault code, error=%d\n",
-			ret);
+		       ret);
 	}
 	/*
 	 * Setup the nofault PIO read target. (There is no special reason why
 	 * SH_IPI_ACCESS was selected.)
 	 */
-	if (is_shub2()) {
+	if (is_shub2())
 		xp_nofault_PIOR_target = SH2_IPI_ACCESS0;
-	} else {
+	else
 		xp_nofault_PIOR_target = SH1_IPI_ACCESS;
-	}
 
 	/* initialize the connection registration mutex */
-	for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++) {
+	for (ch_number = 0; ch_number < XPC_NCHANNELS; ch_number++)
 		mutex_init(&xpc_registrations[ch_number].mutex);
-	}
 
 	return 0;
 }
-module_init(xp_init);
 
+module_init(xp_init);
 
 void __exit
 xp_exit(void)
 {
-	u64 func_addr = *(u64 *) xp_nofault_PIOR;
-	u64 err_func_addr = *(u64 *) xp_error_PIOR;
-
+	u64 func_addr = *(u64 *)xp_nofault_PIOR;
+	u64 err_func_addr = *(u64 *)xp_error_PIOR;
 
 	/* unregister the PIO read nofault code region */
-	(void) sn_register_nofault_code(func_addr, err_func_addr,
-					err_func_addr, 1, 0);
+	(void)sn_register_nofault_code(func_addr, err_func_addr,
+				       err_func_addr, 1, 0);
 }
-module_exit(xp_exit);
 
+module_exit(xp_exit);
 
 MODULE_AUTHOR("Silicon Graphics, Inc.");
 MODULE_DESCRIPTION("Cross Partition (XP) base");
 MODULE_LICENSE("GPL");
-
-EXPORT_SYMBOL(xp_nofault_PIOR);
-EXPORT_SYMBOL(xp_nofault_PIOR_target);
-EXPORT_SYMBOL(xpc_registrations);
-EXPORT_SYMBOL(xpc_interface);
-EXPORT_SYMBOL(xpc_clear_interface);
-EXPORT_SYMBOL(xpc_set_interface);
-EXPORT_SYMBOL(xpc_connect);
-EXPORT_SYMBOL(xpc_disconnect);
-
diff --git a/arch/ia64/sn/kernel/xp_nofault.S b/drivers/misc/sgi-xp/xp_nofault.S
similarity index 94%
rename from arch/ia64/sn/kernel/xp_nofault.S
rename to drivers/misc/sgi-xp/xp_nofault.S
index 98e7c7d..e38d433 100644
--- a/arch/ia64/sn/kernel/xp_nofault.S
+++ b/drivers/misc/sgi-xp/xp_nofault.S
@@ -3,10 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2007 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
-
 /*
  * The xp_nofault_PIOR function takes a pointer to a remote PIO register
  * and attempts to load and consume a value from it.  This function
diff --git a/include/asm-ia64/sn/xpc.h b/drivers/misc/sgi-xp/xpc.h
similarity index 75%
rename from include/asm-ia64/sn/xpc.h
rename to drivers/misc/sgi-xp/xpc.h
index 3c0900a..9eb6d4a 100644
--- a/include/asm-ia64/sn/xpc.h
+++ b/drivers/misc/sgi-xp/xpc.h
@@ -3,17 +3,15 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2007 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
-
 /*
  * Cross Partition Communication (XPC) structures and macros.
  */
 
-#ifndef _ASM_IA64_SN_XPC_H
-#define _ASM_IA64_SN_XPC_H
-
+#ifndef _DRIVERS_MISC_SGIXP_XPC_H
+#define _DRIVERS_MISC_SGIXP_XPC_H
 
 #include <linux/interrupt.h>
 #include <linux/sysctl.h>
@@ -27,8 +25,7 @@
 #include <asm/sn/addrs.h>
 #include <asm/sn/mspec.h>
 #include <asm/sn/shub_mmr.h>
-#include <asm/sn/xp.h>
-
+#include "xp.h"
 
 /*
  * XPC Version numbers consist of a major and minor number. XPC can always
@@ -39,7 +36,6 @@
 #define XPC_VERSION_MAJOR(_v)		((_v) >> 4)
 #define XPC_VERSION_MINOR(_v)		((_v) & 0xf)
 
-
 /*
  * The next macros define word or bit representations for given
  * C-brick nasid in either the SAL provided bit array representing
@@ -67,7 +63,6 @@
 /* define the process name of the discovery thread */
 #define XPC_DISCOVERY_THREAD_NAME	"xpc_discovery"
 
-
 /*
  * the reserved page
  *
@@ -115,16 +110,16 @@
 	u8 partid;		/* SAL: partition ID */
 	u8 version;
 	u8 pad1[6];		/* align to next u64 in cacheline */
-	volatile u64 vars_pa;
+	u64 vars_pa;		/* physical address of struct xpc_vars */
 	struct timespec stamp;	/* time when reserved page was setup by XPC */
 	u64 pad2[9];		/* align to last u64 in cacheline */
 	u64 nasids_size;	/* SAL: size of each nasid mask in bytes */
 };
 
-#define XPC_RP_VERSION _XPC_VERSION(1,1) /* version 1.1 of the reserved page */
+#define XPC_RP_VERSION _XPC_VERSION(1, 1) /* version 1.1 of the reserved page */
 
 #define XPC_SUPPORTS_RP_STAMP(_version) \
-			(_version >= _XPC_VERSION(1,1))
+			(_version >= _XPC_VERSION(1, 1))
 
 /*
  * compare stamps - the return value is:
@@ -138,14 +133,13 @@
 {
 	int ret;
 
-
-	if ((ret = stamp1->tv_sec - stamp2->tv_sec) == 0) {
+	ret = stamp1->tv_sec - stamp2->tv_sec;
+	if (ret == 0)
 		ret = stamp1->tv_nsec - stamp2->tv_nsec;
-	}
+
 	return ret;
 }
 
-
 /*
  * Define the structures by which XPC variables can be exported to other
  * partitions. (There are two: struct xpc_vars and struct xpc_vars_part)
@@ -172,11 +166,10 @@
 	AMO_t *amos_page;	/* vaddr of page of AMOs from MSPEC driver */
 };
 
-#define XPC_V_VERSION _XPC_VERSION(3,1) /* version 3.1 of the cross vars */
+#define XPC_V_VERSION _XPC_VERSION(3, 1)    /* version 3.1 of the cross vars */
 
 #define XPC_SUPPORTS_DISENGAGE_REQUEST(_version) \
-			(_version >= _XPC_VERSION(3,1))
-
+			(_version >= _XPC_VERSION(3, 1))
 
 static inline int
 xpc_hb_allowed(partid_t partid, struct xpc_vars *vars)
@@ -193,7 +186,7 @@
 		old_mask = vars->heartbeating_to_mask;
 		new_mask = (old_mask | (1UL << partid));
 	} while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) !=
-							old_mask);
+		 old_mask);
 }
 
 static inline void
@@ -205,10 +198,9 @@
 		old_mask = vars->heartbeating_to_mask;
 		new_mask = (old_mask & ~(1UL << partid));
 	} while (cmpxchg(&vars->heartbeating_to_mask, old_mask, new_mask) !=
-							old_mask);
+		 old_mask);
 }
 
-
 /*
  * The AMOs page consists of a number of AMO variables which are divided into
  * four groups, The first two groups are used to identify an IRQ's sender.
@@ -222,7 +214,6 @@
 #define XPC_ENGAGED_PARTITIONS_AMO (XPC_ACTIVATE_IRQ_AMOS + XP_NASID_MASK_WORDS)
 #define XPC_DISENGAGE_REQUEST_AMO  (XPC_ENGAGED_PARTITIONS_AMO + 1)
 
-
 /*
  * The following structure describes the per partition specific variables.
  *
@@ -234,7 +225,7 @@
  * occupies half a cacheline.
  */
 struct xpc_vars_part {
-	volatile u64 magic;
+	u64 magic;
 
 	u64 openclose_args_pa;	/* physical address of open and close args */
 	u64 GPs_pa;		/* physical address of Get/Put values */
@@ -257,20 +248,20 @@
  * MAGIC2 indicates that this partition has pulled the remote partititions
  * per partition variables that pertain to this partition.
  */
-#define XPC_VP_MAGIC1	0x0053524156435058L  /* 'XPCVARS\0'L (little endian) */
-#define XPC_VP_MAGIC2	0x0073726176435058L  /* 'XPCvars\0'L (little endian) */
-
+#define XPC_VP_MAGIC1	0x0053524156435058L   /* 'XPCVARS\0'L (little endian) */
+#define XPC_VP_MAGIC2	0x0073726176435058L   /* 'XPCvars\0'L (little endian) */
 
 /* the reserved page sizes and offsets */
 
 #define XPC_RP_HEADER_SIZE	L1_CACHE_ALIGN(sizeof(struct xpc_rsvd_page))
-#define XPC_RP_VARS_SIZE 	L1_CACHE_ALIGN(sizeof(struct xpc_vars))
+#define XPC_RP_VARS_SIZE	L1_CACHE_ALIGN(sizeof(struct xpc_vars))
 
-#define XPC_RP_PART_NASIDS(_rp) (u64 *) ((u8 *) _rp + XPC_RP_HEADER_SIZE)
+#define XPC_RP_PART_NASIDS(_rp) ((u64 *)((u8 *)(_rp) + XPC_RP_HEADER_SIZE))
 #define XPC_RP_MACH_NASIDS(_rp) (XPC_RP_PART_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS(_rp)	((struct xpc_vars *) XPC_RP_MACH_NASIDS(_rp) + xp_nasid_mask_words)
-#define XPC_RP_VARS_PART(_rp)	(struct xpc_vars_part *) ((u8 *) XPC_RP_VARS(rp) + XPC_RP_VARS_SIZE)
-
+#define XPC_RP_VARS(_rp)	((struct xpc_vars *)(XPC_RP_MACH_NASIDS(_rp) + \
+				    xp_nasid_mask_words))
+#define XPC_RP_VARS_PART(_rp)	((struct xpc_vars_part *) \
+				    ((u8 *)XPC_RP_VARS(_rp) + XPC_RP_VARS_SIZE))
 
 /*
  * Functions registered by add_timer() or called by kernel_thread() only
@@ -285,21 +276,17 @@
 #define XPC_UNPACK_ARG1(_args)	(((u64) _args) & 0xffffffff)
 #define XPC_UNPACK_ARG2(_args)	((((u64) _args) >> 32) & 0xffffffff)
 
-
-
 /*
  * Define a Get/Put value pair (pointers) used with a message queue.
  */
 struct xpc_gp {
-	volatile s64 get;	/* Get value */
-	volatile s64 put;	/* Put value */
+	s64 get;		/* Get value */
+	s64 put;		/* Put value */
 };
 
 #define XPC_GP_SIZE \
 		L1_CACHE_ALIGN(sizeof(struct xpc_gp) * XPC_NCHANNELS)
 
-
-
 /*
  * Define a structure that contains arguments associated with opening and
  * closing a channel.
@@ -315,20 +302,15 @@
 #define XPC_OPENCLOSE_ARGS_SIZE \
 	      L1_CACHE_ALIGN(sizeof(struct xpc_openclose_args) * XPC_NCHANNELS)
 
-
-
 /* struct xpc_msg flags */
 
 #define	XPC_M_DONE		0x01	/* msg has been received/consumed */
 #define	XPC_M_READY		0x02	/* msg is ready to be sent */
 #define	XPC_M_INTERRUPT		0x04	/* send interrupt when msg consumed */
 
-
 #define XPC_MSG_ADDRESS(_payload) \
 		((struct xpc_msg *)((u8 *)(_payload) - XPC_MSG_PAYLOAD_OFFSET))
 
-
-
 /*
  * Defines notify entry.
  *
@@ -336,19 +318,17 @@
  * and consumed by the intended recipient.
  */
 struct xpc_notify {
-	volatile u8 type;		/* type of notification */
+	u8 type;		/* type of notification */
 
 	/* the following two fields are only used if type == XPC_N_CALL */
-	xpc_notify_func func;		/* user's notify function */
-	void *key;			/* pointer to user's key */
+	xpc_notify_func func;	/* user's notify function */
+	void *key;		/* pointer to user's key */
 };
 
 /* struct xpc_notify type of notification */
 
 #define	XPC_N_CALL		0x01	/* notify function provided by user */
 
-
-
 /*
  * Define the structure that manages all the stuff required by a channel. In
  * particular, they are used to manage the messages sent across the channel.
@@ -428,48 +408,48 @@
  *	messages.
  */
 struct xpc_channel {
-	partid_t partid;		/* ID of remote partition connected */
-	spinlock_t lock;		/* lock for updating this structure */
-	u32 flags;			/* general flags */
+	partid_t partid;	/* ID of remote partition connected */
+	spinlock_t lock;	/* lock for updating this structure */
+	u32 flags;		/* general flags */
 
-	enum xpc_retval reason;		/* reason why channel is disconnect'g */
-	int reason_line;		/* line# disconnect initiated from */
+	enum xpc_retval reason;	/* reason why channel is disconnect'g */
+	int reason_line;	/* line# disconnect initiated from */
 
-	u16 number;			/* channel # */
+	u16 number;		/* channel # */
 
-	u16 msg_size;			/* sizeof each msg entry */
-	u16 local_nentries;		/* #of msg entries in local msg queue */
-	u16 remote_nentries;		/* #of msg entries in remote msg queue*/
+	u16 msg_size;		/* sizeof each msg entry */
+	u16 local_nentries;	/* #of msg entries in local msg queue */
+	u16 remote_nentries;	/* #of msg entries in remote msg queue */
 
 	void *local_msgqueue_base;	/* base address of kmalloc'd space */
 	struct xpc_msg *local_msgqueue;	/* local message queue */
 	void *remote_msgqueue_base;	/* base address of kmalloc'd space */
-	struct xpc_msg *remote_msgqueue;/* cached copy of remote partition's */
-					/* local message queue */
-	u64 remote_msgqueue_pa;		/* phys addr of remote partition's */
-					/* local message queue */
+	struct xpc_msg *remote_msgqueue; /* cached copy of remote partition's */
+					 /* local message queue */
+	u64 remote_msgqueue_pa;	/* phys addr of remote partition's */
+				/* local message queue */
 
-	atomic_t references;		/* #of external references to queues */
+	atomic_t references;	/* #of external references to queues */
 
-	atomic_t n_on_msg_allocate_wq;   /* #on msg allocation wait queue */
-	wait_queue_head_t msg_allocate_wq; /* msg allocation wait queue */
+	atomic_t n_on_msg_allocate_wq;	/* #on msg allocation wait queue */
+	wait_queue_head_t msg_allocate_wq;	/* msg allocation wait queue */
 
-	u8 delayed_IPI_flags;		/* IPI flags received, but delayed */
-					/* action until channel disconnected */
+	u8 delayed_IPI_flags;	/* IPI flags received, but delayed */
+				/* action until channel disconnected */
 
 	/* queue of msg senders who want to be notified when msg received */
 
-	atomic_t n_to_notify;		/* #of msg senders to notify */
-	struct xpc_notify *notify_queue;/* notify queue for messages sent */
+	atomic_t n_to_notify;	/* #of msg senders to notify */
+	struct xpc_notify *notify_queue;    /* notify queue for messages sent */
 
-	xpc_channel_func func;		/* user's channel function */
-	void *key;			/* pointer to user's key */
+	xpc_channel_func func;	/* user's channel function */
+	void *key;		/* pointer to user's key */
 
 	struct mutex msg_to_pull_mutex;	/* next msg to pull serialization */
-	struct completion wdisconnect_wait; /* wait for channel disconnect */
+	struct completion wdisconnect_wait;    /* wait for channel disconnect */
 
 	struct xpc_openclose_args *local_openclose_args; /* args passed on */
-					/* opening or closing of channel */
+					     /* opening or closing of channel */
 
 	/* various flavors of local and remote Get/Put values */
 
@@ -477,56 +457,48 @@
 	struct xpc_gp remote_GP;	/* remote Get/Put values */
 	struct xpc_gp w_local_GP;	/* working local Get/Put values */
 	struct xpc_gp w_remote_GP;	/* working remote Get/Put values */
-	s64 next_msg_to_pull;		/* Put value of next msg to pull */
+	s64 next_msg_to_pull;	/* Put value of next msg to pull */
 
 	/* kthread management related fields */
 
-// >>> rethink having kthreads_assigned_limit and kthreads_idle_limit; perhaps
-// >>> allow the assigned limit be unbounded and let the idle limit be dynamic
-// >>> dependent on activity over the last interval of time
 	atomic_t kthreads_assigned;	/* #of kthreads assigned to channel */
-	u32 kthreads_assigned_limit; 	/* limit on #of kthreads assigned */
-	atomic_t kthreads_idle;		/* #of kthreads idle waiting for work */
+	u32 kthreads_assigned_limit;	/* limit on #of kthreads assigned */
+	atomic_t kthreads_idle;	/* #of kthreads idle waiting for work */
 	u32 kthreads_idle_limit;	/* limit on #of kthreads idle */
 	atomic_t kthreads_active;	/* #of kthreads actively working */
-	// >>> following field is temporary
-	u32 kthreads_created;		/* total #of kthreads created */
 
 	wait_queue_head_t idle_wq;	/* idle kthread wait queue */
 
 } ____cacheline_aligned;
 
-
 /* struct xpc_channel flags */
 
-#define	XPC_C_WASCONNECTED	0x00000001 /* channel was connected */
+#define	XPC_C_WASCONNECTED	0x00000001	/* channel was connected */
 
-#define	XPC_C_ROPENREPLY	0x00000002 /* remote open channel reply */
-#define	XPC_C_OPENREPLY		0x00000004 /* local open channel reply */
-#define	XPC_C_ROPENREQUEST	0x00000008 /* remote open channel request */
-#define	XPC_C_OPENREQUEST	0x00000010 /* local open channel request */
+#define	XPC_C_ROPENREPLY	0x00000002	/* remote open channel reply */
+#define	XPC_C_OPENREPLY		0x00000004	/* local open channel reply */
+#define	XPC_C_ROPENREQUEST	0x00000008     /* remote open channel request */
+#define	XPC_C_OPENREQUEST	0x00000010	/* local open channel request */
 
 #define	XPC_C_SETUP		0x00000020 /* channel's msgqueues are alloc'd */
-#define	XPC_C_CONNECTEDCALLOUT	0x00000040 /* connected callout initiated */
+#define	XPC_C_CONNECTEDCALLOUT	0x00000040     /* connected callout initiated */
 #define	XPC_C_CONNECTEDCALLOUT_MADE \
-				0x00000080 /* connected callout completed */
-#define	XPC_C_CONNECTED		0x00000100 /* local channel is connected */
-#define	XPC_C_CONNECTING	0x00000200 /* channel is being connected */
+				0x00000080     /* connected callout completed */
+#define	XPC_C_CONNECTED		0x00000100	/* local channel is connected */
+#define	XPC_C_CONNECTING	0x00000200	/* channel is being connected */
 
-#define	XPC_C_RCLOSEREPLY	0x00000400 /* remote close channel reply */
-#define	XPC_C_CLOSEREPLY	0x00000800 /* local close channel reply */
-#define	XPC_C_RCLOSEREQUEST	0x00001000 /* remote close channel request */
-#define	XPC_C_CLOSEREQUEST	0x00002000 /* local close channel request */
+#define	XPC_C_RCLOSEREPLY	0x00000400	/* remote close channel reply */
+#define	XPC_C_CLOSEREPLY	0x00000800	/* local close channel reply */
+#define	XPC_C_RCLOSEREQUEST	0x00001000    /* remote close channel request */
+#define	XPC_C_CLOSEREQUEST	0x00002000     /* local close channel request */
 
-#define	XPC_C_DISCONNECTED	0x00004000 /* channel is disconnected */
-#define	XPC_C_DISCONNECTING	0x00008000 /* channel is being disconnected */
+#define	XPC_C_DISCONNECTED	0x00004000	/* channel is disconnected */
+#define	XPC_C_DISCONNECTING	0x00008000   /* channel is being disconnected */
 #define	XPC_C_DISCONNECTINGCALLOUT \
 				0x00010000 /* disconnecting callout initiated */
 #define	XPC_C_DISCONNECTINGCALLOUT_MADE \
 				0x00020000 /* disconnecting callout completed */
-#define	XPC_C_WDISCONNECT	0x00040000 /* waiting for channel disconnect */
-
-
+#define	XPC_C_WDISCONNECT	0x00040000  /* waiting for channel disconnect */
 
 /*
  * Manages channels on a partition basis. There is one of these structures
@@ -537,33 +509,31 @@
 
 	/* XPC HB infrastructure */
 
-	u8 remote_rp_version;		/* version# of partition's rsvd pg */
-	struct timespec remote_rp_stamp;/* time when rsvd pg was initialized */
-	u64 remote_rp_pa;		/* phys addr of partition's rsvd pg */
-	u64 remote_vars_pa;		/* phys addr of partition's vars */
+	u8 remote_rp_version;	/* version# of partition's rsvd pg */
+	struct timespec remote_rp_stamp; /* time when rsvd pg was initialized */
+	u64 remote_rp_pa;	/* phys addr of partition's rsvd pg */
+	u64 remote_vars_pa;	/* phys addr of partition's vars */
 	u64 remote_vars_part_pa;	/* phys addr of partition's vars part */
-	u64 last_heartbeat;		/* HB at last read */
+	u64 last_heartbeat;	/* HB at last read */
 	u64 remote_amos_page_pa;	/* phys addr of partition's amos page */
-	int remote_act_nasid;		/* active part's act/deact nasid */
+	int remote_act_nasid;	/* active part's act/deact nasid */
 	int remote_act_phys_cpuid;	/* active part's act/deact phys cpuid */
-	u32 act_IRQ_rcvd;		/* IRQs since activation */
-	spinlock_t act_lock;		/* protect updating of act_state */
-	u8 act_state;			/* from XPC HB viewpoint */
-	u8 remote_vars_version;		/* version# of partition's vars */
-	enum xpc_retval reason;		/* reason partition is deactivating */
-	int reason_line;		/* line# deactivation initiated from */
-	int reactivate_nasid;		/* nasid in partition to reactivate */
+	u32 act_IRQ_rcvd;	/* IRQs since activation */
+	spinlock_t act_lock;	/* protect updating of act_state */
+	u8 act_state;		/* from XPC HB viewpoint */
+	u8 remote_vars_version;	/* version# of partition's vars */
+	enum xpc_retval reason;	/* reason partition is deactivating */
+	int reason_line;	/* line# deactivation initiated from */
+	int reactivate_nasid;	/* nasid in partition to reactivate */
 
-	unsigned long disengage_request_timeout; /* timeout in jiffies */
+	unsigned long disengage_request_timeout;	/* timeout in jiffies */
 	struct timer_list disengage_request_timer;
 
-
 	/* XPC infrastructure referencing and teardown control */
 
-	volatile u8 setup_state;	/* infrastructure setup state */
+	u8 setup_state;		/* infrastructure setup state */
 	wait_queue_head_t teardown_wq;	/* kthread waiting to teardown infra */
-	atomic_t references;		/* #of references to infrastructure */
-
+	atomic_t references;	/* #of references to infrastructure */
 
 	/*
 	 * NONE OF THE PRECEDING FIELDS OF THIS STRUCTURE WILL BE CLEARED WHEN
@@ -572,53 +542,48 @@
 	 * 'nchannels' FIELD MUST BE THE FIRST OF THE FIELDS TO BE CLEARED.)
 	 */
 
+	u8 nchannels;		/* #of defined channels supported */
+	atomic_t nchannels_active;  /* #of channels that are not DISCONNECTED */
+	atomic_t nchannels_engaged;  /* #of channels engaged with remote part */
+	struct xpc_channel *channels;	/* array of channel structures */
 
-	u8 nchannels;		   /* #of defined channels supported */
-	atomic_t nchannels_active; /* #of channels that are not DISCONNECTED */
-	atomic_t nchannels_engaged;/* #of channels engaged with remote part */
-	struct xpc_channel *channels;/* array of channel structures */
-
-	void *local_GPs_base;	  /* base address of kmalloc'd space */
-	struct xpc_gp *local_GPs; /* local Get/Put values */
-	void *remote_GPs_base;    /* base address of kmalloc'd space */
-	struct xpc_gp *remote_GPs;/* copy of remote partition's local Get/Put */
-				  /* values */
-	u64 remote_GPs_pa;	  /* phys address of remote partition's local */
-				  /* Get/Put values */
-
+	void *local_GPs_base;	/* base address of kmalloc'd space */
+	struct xpc_gp *local_GPs;	/* local Get/Put values */
+	void *remote_GPs_base;	/* base address of kmalloc'd space */
+	struct xpc_gp *remote_GPs;	/* copy of remote partition's local */
+					/* Get/Put values */
+	u64 remote_GPs_pa;	/* phys address of remote partition's local */
+				/* Get/Put values */
 
 	/* fields used to pass args when opening or closing a channel */
 
-	void *local_openclose_args_base;  /* base address of kmalloc'd space */
-	struct xpc_openclose_args *local_openclose_args;  /* local's args */
-	void *remote_openclose_args_base; /* base address of kmalloc'd space */
+	void *local_openclose_args_base;   /* base address of kmalloc'd space */
+	struct xpc_openclose_args *local_openclose_args;      /* local's args */
+	void *remote_openclose_args_base;  /* base address of kmalloc'd space */
 	struct xpc_openclose_args *remote_openclose_args; /* copy of remote's */
-					  /* args */
-	u64 remote_openclose_args_pa;	  /* phys addr of remote's args */
-
+							  /* args */
+	u64 remote_openclose_args_pa;	/* phys addr of remote's args */
 
 	/* IPI sending, receiving and handling related fields */
 
-	int remote_IPI_nasid;	    /* nasid of where to send IPIs */
-	int remote_IPI_phys_cpuid;  /* phys CPU ID of where to send IPIs */
-	AMO_t *remote_IPI_amo_va;   /* address of remote IPI AMO_t structure */
+	int remote_IPI_nasid;	/* nasid of where to send IPIs */
+	int remote_IPI_phys_cpuid;	/* phys CPU ID of where to send IPIs */
+	AMO_t *remote_IPI_amo_va;    /* address of remote IPI AMO_t structure */
 
-	AMO_t *local_IPI_amo_va;    /* address of IPI AMO_t structure */
-	u64 local_IPI_amo;	    /* IPI amo flags yet to be handled */
-	char IPI_owner[8];	    /* IPI owner's name */
-	struct timer_list dropped_IPI_timer; /* dropped IPI timer */
+	AMO_t *local_IPI_amo_va;	/* address of IPI AMO_t structure */
+	u64 local_IPI_amo;	/* IPI amo flags yet to be handled */
+	char IPI_owner[8];	/* IPI owner's name */
+	struct timer_list dropped_IPI_timer;	/* dropped IPI timer */
 
-	spinlock_t IPI_lock;	    /* IPI handler lock */
-
+	spinlock_t IPI_lock;	/* IPI handler lock */
 
 	/* channel manager related fields */
 
 	atomic_t channel_mgr_requests;	/* #of requests to activate chan mgr */
-	wait_queue_head_t channel_mgr_wq; /* channel mgr's wait queue */
+	wait_queue_head_t channel_mgr_wq;	/* channel mgr's wait queue */
 
 } ____cacheline_aligned;
 
-
 /* struct xpc_partition act_state values (for XPC HB) */
 
 #define	XPC_P_INACTIVE		0x00	/* partition is not active */
@@ -627,11 +592,9 @@
 #define XPC_P_ACTIVE		0x03	/* xpc_partition_up() was called */
 #define XPC_P_DEACTIVATING	0x04	/* partition deactivation initiated */
 
-
 #define XPC_DEACTIVATE_PARTITION(_p, _reason) \
 			xpc_deactivate_partition(__LINE__, (_p), (_reason))
 
-
 /* struct xpc_partition setup_state values */
 
 #define XPC_P_UNSET		0x00	/* infrastructure was never setup */
@@ -639,8 +602,6 @@
 #define XPC_P_WTEARDOWN		0x02	/* waiting to teardown infrastructure */
 #define XPC_P_TORNDOWN		0x03	/* infrastructure is torndown */
 
-
-
 /*
  * struct xpc_partition IPI_timer #of seconds to wait before checking for
  * dropped IPIs. These occur whenever an IPI amo write doesn't complete until
@@ -648,22 +609,17 @@
  */
 #define XPC_P_DROPPED_IPI_WAIT	(0.25 * HZ)
 
-
 /* number of seconds to wait for other partitions to disengage */
 #define XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT	90
 
 /* interval in seconds to print 'waiting disengagement' messages */
 #define XPC_DISENGAGE_PRINTMSG_INTERVAL		10
 
-
 #define XPC_PARTID(_p)	((partid_t) ((_p) - &xpc_partitions[0]))
 
-
-
 /* found in xp_main.c */
 extern struct xpc_registration xpc_registrations[];
 
-
 /* found in xpc_main.c */
 extern struct device *xpc_part;
 extern struct device *xpc_chan;
@@ -676,7 +632,6 @@
 extern void xpc_create_kthreads(struct xpc_channel *, int, int);
 extern void xpc_disconnect_wait(int);
 
-
 /* found in xpc_partition.c */
 extern int xpc_exiting;
 extern struct xpc_vars *xpc_vars;
@@ -696,10 +651,9 @@
 extern void xpc_discovery(void);
 extern void xpc_check_remote_hb(void);
 extern void xpc_deactivate_partition(const int, struct xpc_partition *,
-						enum xpc_retval);
+				     enum xpc_retval);
 extern enum xpc_retval xpc_initiate_partid_to_nasids(partid_t, void *);
 
-
 /* found in xpc_channel.c */
 extern void xpc_initiate_connect(int);
 extern void xpc_initiate_disconnect(int);
@@ -714,23 +668,18 @@
 extern void xpc_connected_callout(struct xpc_channel *);
 extern void xpc_deliver_msg(struct xpc_channel *);
 extern void xpc_disconnect_channel(const int, struct xpc_channel *,
-					enum xpc_retval, unsigned long *);
+				   enum xpc_retval, unsigned long *);
 extern void xpc_disconnect_callout(struct xpc_channel *, enum xpc_retval);
 extern void xpc_partition_going_down(struct xpc_partition *, enum xpc_retval);
 extern void xpc_teardown_infrastructure(struct xpc_partition *);
 
-
-
 static inline void
 xpc_wakeup_channel_mgr(struct xpc_partition *part)
 {
-	if (atomic_inc_return(&part->channel_mgr_requests) == 1) {
+	if (atomic_inc_return(&part->channel_mgr_requests) == 1)
 		wake_up(&part->channel_mgr_wq);
-	}
 }
 
-
-
 /*
  * These next two inlines are used to keep us from tearing down a channel's
  * msg queues while a thread may be referencing them.
@@ -747,17 +696,13 @@
 	s32 refs = atomic_dec_return(&ch->references);
 
 	DBUG_ON(refs < 0);
-	if (refs == 0) {
+	if (refs == 0)
 		xpc_wakeup_channel_mgr(&xpc_partitions[ch->partid]);
-	}
 }
 
-
-
 #define XPC_DISCONNECT_CHANNEL(_ch, _reason, _irqflgs) \
 		xpc_disconnect_channel(__LINE__, _ch, _reason, _irqflgs)
 
-
 /*
  * These two inlines are used to keep us from tearing down a partition's
  * setup infrastructure while a thread may be referencing it.
@@ -767,11 +712,9 @@
 {
 	s32 refs = atomic_dec_return(&part->references);
 
-
 	DBUG_ON(refs < 0);
-	if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN) {
+	if (refs == 0 && part->setup_state == XPC_P_WTEARDOWN)
 		wake_up(&part->teardown_wq);
-	}
 }
 
 static inline int
@@ -779,17 +722,14 @@
 {
 	int setup;
 
-
 	atomic_inc(&part->references);
 	setup = (part->setup_state == XPC_P_SETUP);
-	if (!setup) {
+	if (!setup)
 		xpc_part_deref(part);
-	}
+
 	return setup;
 }
 
-
-
 /*
  * The following macro is to be used for the setting of the reason and
  * reason_line fields in both the struct xpc_channel and struct xpc_partition
@@ -801,8 +741,6 @@
 		(_p)->reason_line = _line; \
 	}
 
-
-
 /*
  * This next set of inlines are used to keep track of when a partition is
  * potentially engaged in accessing memory belonging to another partition.
@@ -812,23 +750,24 @@
 xpc_mark_partition_engaged(struct xpc_partition *part)
 {
 	unsigned long irq_flags;
-	AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
-				(XPC_ENGAGED_PARTITIONS_AMO * sizeof(AMO_t)));
-
+	AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa +
+				   (XPC_ENGAGED_PARTITIONS_AMO *
+				    sizeof(AMO_t)));
 
 	local_irq_save(irq_flags);
 
 	/* set bit corresponding to our partid in remote partition's AMO */
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR,
-						(1UL << sn_partition_id));
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
+			 (1UL << sn_partition_id));
 	/*
 	 * We must always use the nofault function regardless of whether we
 	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
 	 * didn't, we'd never know that the other partition is down and would
 	 * keep sending IPIs and AMOs to it until the heartbeat times out.
 	 */
-	(void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
-				variable), xp_nofault_PIOR_target));
+	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
+							       variable),
+						     xp_nofault_PIOR_target));
 
 	local_irq_restore(irq_flags);
 }
@@ -837,23 +776,24 @@
 xpc_mark_partition_disengaged(struct xpc_partition *part)
 {
 	unsigned long irq_flags;
-	AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
-				(XPC_ENGAGED_PARTITIONS_AMO * sizeof(AMO_t)));
-
+	AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa +
+				   (XPC_ENGAGED_PARTITIONS_AMO *
+				    sizeof(AMO_t)));
 
 	local_irq_save(irq_flags);
 
 	/* clear bit corresponding to our partid in remote partition's AMO */
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
-						~(1UL << sn_partition_id));
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
+			 ~(1UL << sn_partition_id));
 	/*
 	 * We must always use the nofault function regardless of whether we
 	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
 	 * didn't, we'd never know that the other partition is down and would
 	 * keep sending IPIs and AMOs to it until the heartbeat times out.
 	 */
-	(void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
-				variable), xp_nofault_PIOR_target));
+	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
+							       variable),
+						     xp_nofault_PIOR_target));
 
 	local_irq_restore(irq_flags);
 }
@@ -862,23 +802,23 @@
 xpc_request_partition_disengage(struct xpc_partition *part)
 {
 	unsigned long irq_flags;
-	AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
-				(XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
-
+	AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa +
+				   (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
 
 	local_irq_save(irq_flags);
 
 	/* set bit corresponding to our partid in remote partition's AMO */
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR,
-						(1UL << sn_partition_id));
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
+			 (1UL << sn_partition_id));
 	/*
 	 * We must always use the nofault function regardless of whether we
 	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
 	 * didn't, we'd never know that the other partition is down and would
 	 * keep sending IPIs and AMOs to it until the heartbeat times out.
 	 */
-	(void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
-				variable), xp_nofault_PIOR_target));
+	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
+							       variable),
+						     xp_nofault_PIOR_target));
 
 	local_irq_restore(irq_flags);
 }
@@ -887,23 +827,23 @@
 xpc_cancel_partition_disengage_request(struct xpc_partition *part)
 {
 	unsigned long irq_flags;
-	AMO_t *amo = (AMO_t *) __va(part->remote_amos_page_pa +
-				(XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
-
+	AMO_t *amo = (AMO_t *)__va(part->remote_amos_page_pa +
+				   (XPC_DISENGAGE_REQUEST_AMO * sizeof(AMO_t)));
 
 	local_irq_save(irq_flags);
 
 	/* clear bit corresponding to our partid in remote partition's AMO */
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
-						~(1UL << sn_partition_id));
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
+			 ~(1UL << sn_partition_id));
 	/*
 	 * We must always use the nofault function regardless of whether we
 	 * are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
 	 * didn't, we'd never know that the other partition is down and would
 	 * keep sending IPIs and AMOs to it until the heartbeat times out.
 	 */
-	(void) xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->
-				variable), xp_nofault_PIOR_target));
+	(void)xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->
+							       variable),
+						     xp_nofault_PIOR_target));
 
 	local_irq_restore(irq_flags);
 }
@@ -913,10 +853,9 @@
 {
 	AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
 
-
 	/* return our partition's AMO variable ANDed with partid_mask */
-	return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) &
-								partid_mask);
+	return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
+		partid_mask);
 }
 
 static inline u64
@@ -924,10 +863,9 @@
 {
 	AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
 
-
 	/* return our partition's AMO variable ANDed with partid_mask */
-	return (FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_LOAD) &
-								partid_mask);
+	return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
+		partid_mask);
 }
 
 static inline void
@@ -935,10 +873,9 @@
 {
 	AMO_t *amo = xpc_vars->amos_page + XPC_ENGAGED_PARTITIONS_AMO;
 
-
 	/* clear bit(s) based on partid_mask in our partition's AMO */
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
-								~partid_mask);
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
+			 ~partid_mask);
 }
 
 static inline void
@@ -946,14 +883,11 @@
 {
 	AMO_t *amo = xpc_vars->amos_page + XPC_DISENGAGE_REQUEST_AMO;
 
-
 	/* clear bit(s) based on partid_mask in our partition's AMO */
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_AND,
-								~partid_mask);
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
+			 ~partid_mask);
 }
 
-
-
 /*
  * The following set of macros and inlines are used for the sending and
  * receiving of IPIs (also known as IRQs). There are two flavors of IPIs,
@@ -964,20 +898,18 @@
 static inline u64
 xpc_IPI_receive(AMO_t *amo)
 {
-	return FETCHOP_LOAD_OP(TO_AMO((u64) &amo->variable), FETCHOP_CLEAR);
+	return FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_CLEAR);
 }
 
-
 static inline enum xpc_retval
 xpc_IPI_send(AMO_t *amo, u64 flag, int nasid, int phys_cpuid, int vector)
 {
 	int ret = 0;
 	unsigned long irq_flags;
 
-
 	local_irq_save(irq_flags);
 
-	FETCHOP_STORE_OP(TO_AMO((u64) &amo->variable), FETCHOP_OR, flag);
+	FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR, flag);
 	sn_send_IPI_phys(nasid, phys_cpuid, vector, 0);
 
 	/*
@@ -986,15 +918,14 @@
 	 * didn't, we'd never know that the other partition is down and would
 	 * keep sending IPIs and AMOs to it until the heartbeat times out.
 	 */
-	ret = xp_nofault_PIOR((u64 *) GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
-				xp_nofault_PIOR_target));
+	ret = xp_nofault_PIOR((u64 *)GLOBAL_MMR_ADDR(NASID_GET(&amo->variable),
+						     xp_nofault_PIOR_target));
 
 	local_irq_restore(irq_flags);
 
 	return ((ret == 0) ? xpcSuccess : xpcPioReadError);
 }
 
-
 /*
  * IPIs associated with SGI_XPC_ACTIVATE IRQ.
  */
@@ -1004,47 +935,47 @@
  */
 static inline void
 xpc_activate_IRQ_send(u64 amos_page_pa, int from_nasid, int to_nasid,
-			int to_phys_cpuid)
+		      int to_phys_cpuid)
 {
 	int w_index = XPC_NASID_W_INDEX(from_nasid);
 	int b_index = XPC_NASID_B_INDEX(from_nasid);
-	AMO_t *amos = (AMO_t *) __va(amos_page_pa +
-				(XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t)));
+	AMO_t *amos = (AMO_t *)__va(amos_page_pa +
+				    (XPC_ACTIVATE_IRQ_AMOS * sizeof(AMO_t)));
 
-
-	(void) xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid,
-				to_phys_cpuid, SGI_XPC_ACTIVATE);
+	(void)xpc_IPI_send(&amos[w_index], (1UL << b_index), to_nasid,
+			   to_phys_cpuid, SGI_XPC_ACTIVATE);
 }
 
 static inline void
 xpc_IPI_send_activate(struct xpc_vars *vars)
 {
 	xpc_activate_IRQ_send(vars->amos_page_pa, cnodeid_to_nasid(0),
-				vars->act_nasid, vars->act_phys_cpuid);
+			      vars->act_nasid, vars->act_phys_cpuid);
 }
 
 static inline void
 xpc_IPI_send_activated(struct xpc_partition *part)
 {
 	xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0),
-			part->remote_act_nasid, part->remote_act_phys_cpuid);
+			      part->remote_act_nasid,
+			      part->remote_act_phys_cpuid);
 }
 
 static inline void
 xpc_IPI_send_reactivate(struct xpc_partition *part)
 {
 	xpc_activate_IRQ_send(xpc_vars->amos_page_pa, part->reactivate_nasid,
-				xpc_vars->act_nasid, xpc_vars->act_phys_cpuid);
+			      xpc_vars->act_nasid, xpc_vars->act_phys_cpuid);
 }
 
 static inline void
 xpc_IPI_send_disengage(struct xpc_partition *part)
 {
 	xpc_activate_IRQ_send(part->remote_amos_page_pa, cnodeid_to_nasid(0),
-			part->remote_act_nasid, part->remote_act_phys_cpuid);
+			      part->remote_act_nasid,
+			      part->remote_act_phys_cpuid);
 }
 
-
 /*
  * IPIs associated with SGI_XPC_NOTIFY IRQ.
  */
@@ -1058,33 +989,28 @@
 
 static inline void
 xpc_notify_IRQ_send(struct xpc_channel *ch, u8 ipi_flag, char *ipi_flag_string,
-			unsigned long *irq_flags)
+		    unsigned long *irq_flags)
 {
 	struct xpc_partition *part = &xpc_partitions[ch->partid];
 	enum xpc_retval ret;
 
-
 	if (likely(part->act_state != XPC_P_DEACTIVATING)) {
 		ret = xpc_IPI_send(part->remote_IPI_amo_va,
-					(u64) ipi_flag << (ch->number * 8),
-					part->remote_IPI_nasid,
-					part->remote_IPI_phys_cpuid,
-					SGI_XPC_NOTIFY);
+				   (u64)ipi_flag << (ch->number * 8),
+				   part->remote_IPI_nasid,
+				   part->remote_IPI_phys_cpuid, SGI_XPC_NOTIFY);
 		dev_dbg(xpc_chan, "%s sent to partid=%d, channel=%d, ret=%d\n",
 			ipi_flag_string, ch->partid, ch->number, ret);
 		if (unlikely(ret != xpcSuccess)) {
-			if (irq_flags != NULL) {
+			if (irq_flags != NULL)
 				spin_unlock_irqrestore(&ch->lock, *irq_flags);
-			}
 			XPC_DEACTIVATE_PARTITION(part, ret);
-			if (irq_flags != NULL) {
+			if (irq_flags != NULL)
 				spin_lock_irqsave(&ch->lock, *irq_flags);
-			}
 		}
 	}
 }
 
-
 /*
  * Make it look like the remote partition, which is associated with the
  * specified channel, sent us an IPI. This faked IPI will be handled
@@ -1095,18 +1021,16 @@
 
 static inline void
 xpc_notify_IRQ_send_local(struct xpc_channel *ch, u8 ipi_flag,
-				char *ipi_flag_string)
+			  char *ipi_flag_string)
 {
 	struct xpc_partition *part = &xpc_partitions[ch->partid];
 
-
-	FETCHOP_STORE_OP(TO_AMO((u64) &part->local_IPI_amo_va->variable),
-			FETCHOP_OR, ((u64) ipi_flag << (ch->number * 8)));
+	FETCHOP_STORE_OP(TO_AMO((u64)&part->local_IPI_amo_va->variable),
+			 FETCHOP_OR, ((u64)ipi_flag << (ch->number * 8)));
 	dev_dbg(xpc_chan, "%s sent local from partid=%d, channel=%d\n",
 		ipi_flag_string, ch->partid, ch->number);
 }
 
-
 /*
  * The sending and receiving of IPIs includes the setting of an AMO variable
  * to indicate the reason the IPI was sent. The 64-bit variable is divided
@@ -1121,21 +1045,18 @@
 #define	XPC_IPI_OPENREPLY	0x08
 #define	XPC_IPI_MSGREQUEST	0x10
 
-
 /* given an AMO variable and a channel#, get its associated IPI flags */
 #define XPC_GET_IPI_FLAGS(_amo, _c)	((u8) (((_amo) >> ((_c) * 8)) & 0xff))
 #define XPC_SET_IPI_FLAGS(_amo, _c, _f)	(_amo) |= ((u64) (_f) << ((_c) * 8))
 
-#define	XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & __IA64_UL_CONST(0x0f0f0f0f0f0f0f0f))
-#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo)       ((_amo) & __IA64_UL_CONST(0x1010101010101010))
-
+#define	XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(_amo) ((_amo) & 0x0f0f0f0f0f0f0f0fUL)
+#define XPC_ANY_MSG_IPI_FLAGS_SET(_amo)       ((_amo) & 0x1010101010101010UL)
 
 static inline void
 xpc_IPI_send_closerequest(struct xpc_channel *ch, unsigned long *irq_flags)
 {
 	struct xpc_openclose_args *args = ch->local_openclose_args;
 
-
 	args->reason = ch->reason;
 
 	XPC_NOTIFY_IRQ_SEND(ch, XPC_IPI_CLOSEREQUEST, irq_flags);
@@ -1152,7 +1073,6 @@
 {
 	struct xpc_openclose_args *args = ch->local_openclose_args;
 
-
 	args->msg_size = ch->msg_size;
 	args->local_nentries = ch->local_nentries;
 
@@ -1164,7 +1084,6 @@
 {
 	struct xpc_openclose_args *args = ch->local_openclose_args;
 
-
 	args->remote_nentries = ch->remote_nentries;
 	args->local_nentries = ch->local_nentries;
 	args->local_msgqueue_pa = __pa(ch->local_msgqueue);
@@ -1184,7 +1103,6 @@
 	XPC_NOTIFY_IRQ_SEND_LOCAL(ch, XPC_IPI_MSGREQUEST);
 }
 
-
 /*
  * Memory for XPC's AMO variables is allocated by the MSPEC driver. These
  * pages are located in the lowest granule. The lowest granule uses 4k pages
@@ -1201,13 +1119,10 @@
 {
 	AMO_t *amo = xpc_vars->amos_page + index;
 
-
-	(void) xpc_IPI_receive(amo);	/* clear AMO variable */
+	(void)xpc_IPI_receive(amo);	/* clear AMO variable */
 	return amo;
 }
 
-
-
 static inline enum xpc_retval
 xpc_map_bte_errors(bte_result_t error)
 {
@@ -1220,22 +1135,31 @@
 		return xpcBteUnmappedError;
 	}
 	switch (error) {
-	case BTE_SUCCESS:	return xpcSuccess;
-	case BTEFAIL_DIR:	return xpcBteDirectoryError;
-	case BTEFAIL_POISON:	return xpcBtePoisonError;
-	case BTEFAIL_WERR:	return xpcBteWriteError;
-	case BTEFAIL_ACCESS:	return xpcBteAccessError;
-	case BTEFAIL_PWERR:	return xpcBtePWriteError;
-	case BTEFAIL_PRERR:	return xpcBtePReadError;
-	case BTEFAIL_TOUT:	return xpcBteTimeOutError;
-	case BTEFAIL_XTERR:	return xpcBteXtalkError;
-	case BTEFAIL_NOTAVAIL:	return xpcBteNotAvailable;
-	default:		return xpcBteUnmappedError;
+	case BTE_SUCCESS:
+		return xpcSuccess;
+	case BTEFAIL_DIR:
+		return xpcBteDirectoryError;
+	case BTEFAIL_POISON:
+		return xpcBtePoisonError;
+	case BTEFAIL_WERR:
+		return xpcBteWriteError;
+	case BTEFAIL_ACCESS:
+		return xpcBteAccessError;
+	case BTEFAIL_PWERR:
+		return xpcBtePWriteError;
+	case BTEFAIL_PRERR:
+		return xpcBtePReadError;
+	case BTEFAIL_TOUT:
+		return xpcBteTimeOutError;
+	case BTEFAIL_XTERR:
+		return xpcBteXtalkError;
+	case BTEFAIL_NOTAVAIL:
+		return xpcBteNotAvailable;
+	default:
+		return xpcBteUnmappedError;
 	}
 }
 
-
-
 /*
  * Check to see if there is any channel activity to/from the specified
  * partition.
@@ -1246,11 +1170,9 @@
 	u64 IPI_amo;
 	unsigned long irq_flags;
 
-
 	IPI_amo = xpc_IPI_receive(part->local_IPI_amo_va);
-	if (IPI_amo == 0) {
+	if (IPI_amo == 0)
 		return;
-	}
 
 	spin_lock_irqsave(&part->IPI_lock, irq_flags);
 	part->local_IPI_amo |= IPI_amo;
@@ -1262,6 +1184,4 @@
 	xpc_wakeup_channel_mgr(part);
 }
 
-
-#endif /* _ASM_IA64_SN_XPC_H */
-
+#endif /* _DRIVERS_MISC_SGIXP_XPC_H */
diff --git a/arch/ia64/sn/kernel/xpc_channel.c b/drivers/misc/sgi-xp/xpc_channel.c
similarity index 86%
rename from arch/ia64/sn/kernel/xpc_channel.c
rename to drivers/misc/sgi-xp/xpc_channel.c
index 44ccc0d..bfcb9ea 100644
--- a/arch/ia64/sn/kernel/xpc_channel.c
+++ b/drivers/misc/sgi-xp/xpc_channel.c
@@ -3,10 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2006 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
-
 /*
  * Cross Partition Communication (XPC) channel support.
  *
@@ -15,7 +14,6 @@
  *
  */
 
-
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/sched.h>
@@ -25,8 +23,7 @@
 #include <linux/completion.h>
 #include <asm/sn/bte.h>
 #include <asm/sn/sn_sal.h>
-#include <asm/sn/xpc.h>
-
+#include "xpc.h"
 
 /*
  * Guarantee that the kzalloc'd memory is cacheline aligned.
@@ -36,22 +33,21 @@
 {
 	/* see if kzalloc will give us cachline aligned memory by default */
 	*base = kzalloc(size, flags);
-	if (*base == NULL) {
+	if (*base == NULL)
 		return NULL;
-	}
-	if ((u64) *base == L1_CACHE_ALIGN((u64) *base)) {
+
+	if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
 		return *base;
-	}
+
 	kfree(*base);
 
 	/* nope, we'll have to do it ourselves */
 	*base = kzalloc(size + L1_CACHE_BYTES, flags);
-	if (*base == NULL) {
+	if (*base == NULL)
 		return NULL;
-	}
-	return (void *) L1_CACHE_ALIGN((u64) *base);
-}
 
+	return (void *)L1_CACHE_ALIGN((u64)*base);
+}
 
 /*
  * Set up the initial values for the XPartition Communication channels.
@@ -62,7 +58,6 @@
 	int ch_number;
 	struct xpc_channel *ch;
 
-
 	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
 		ch = &part->channels[ch_number];
 
@@ -72,7 +67,7 @@
 
 		ch->local_GP = &part->local_GPs[ch_number];
 		ch->local_openclose_args =
-					&part->local_openclose_args[ch_number];
+		    &part->local_openclose_args[ch_number];
 
 		atomic_set(&ch->kthreads_assigned, 0);
 		atomic_set(&ch->kthreads_idle, 0);
@@ -91,7 +86,6 @@
 	}
 }
 
-
 /*
  * Setup the infrastructure necessary to support XPartition Communication
  * between the specified remote partition and the local one.
@@ -103,7 +97,6 @@
 	struct timer_list *timer;
 	partid_t partid = XPC_PARTID(part);
 
-
 	/*
 	 * Zero out MOST of the entry for this partition. Only the fields
 	 * starting with `nchannels' will be zeroed. The preceding fields must
@@ -111,14 +104,14 @@
 	 * referenced during this memset() operation.
 	 */
 	memset(&part->nchannels, 0, sizeof(struct xpc_partition) -
-				offsetof(struct xpc_partition, nchannels));
+	       offsetof(struct xpc_partition, nchannels));
 
 	/*
 	 * Allocate all of the channel structures as a contiguous chunk of
 	 * memory.
 	 */
 	part->channels = kzalloc(sizeof(struct xpc_channel) * XPC_NCHANNELS,
-								GFP_KERNEL);
+				 GFP_KERNEL);
 	if (part->channels == NULL) {
 		dev_err(xpc_chan, "can't get memory for channels\n");
 		return xpcNoMemory;
@@ -126,11 +119,11 @@
 
 	part->nchannels = XPC_NCHANNELS;
 
-
 	/* allocate all the required GET/PUT values */
 
 	part->local_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
-					GFP_KERNEL, &part->local_GPs_base);
+							GFP_KERNEL,
+							&part->local_GPs_base);
 	if (part->local_GPs == NULL) {
 		kfree(part->channels);
 		part->channels = NULL;
@@ -140,7 +133,9 @@
 	}
 
 	part->remote_GPs = xpc_kzalloc_cacheline_aligned(XPC_GP_SIZE,
-					GFP_KERNEL, &part->remote_GPs_base);
+							 GFP_KERNEL,
+							 &part->
+							 remote_GPs_base);
 	if (part->remote_GPs == NULL) {
 		dev_err(xpc_chan, "can't get memory for remote get/put "
 			"values\n");
@@ -151,12 +146,11 @@
 		return xpcNoMemory;
 	}
 
-
 	/* allocate all the required open and close args */
 
-	part->local_openclose_args = xpc_kzalloc_cacheline_aligned(
-					XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
-					&part->local_openclose_args_base);
+	part->local_openclose_args =
+	    xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
+					  &part->local_openclose_args_base);
 	if (part->local_openclose_args == NULL) {
 		dev_err(xpc_chan, "can't get memory for local connect args\n");
 		kfree(part->remote_GPs_base);
@@ -168,9 +162,9 @@
 		return xpcNoMemory;
 	}
 
-	part->remote_openclose_args = xpc_kzalloc_cacheline_aligned(
-					XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
-					&part->remote_openclose_args_base);
+	part->remote_openclose_args =
+	    xpc_kzalloc_cacheline_aligned(XPC_OPENCLOSE_ARGS_SIZE, GFP_KERNEL,
+					  &part->remote_openclose_args_base);
 	if (part->remote_openclose_args == NULL) {
 		dev_err(xpc_chan, "can't get memory for remote connect args\n");
 		kfree(part->local_openclose_args_base);
@@ -184,13 +178,11 @@
 		return xpcNoMemory;
 	}
 
-
 	xpc_initialize_channels(part, partid);
 
 	atomic_set(&part->nchannels_active, 0);
 	atomic_set(&part->nchannels_engaged, 0);
 
-
 	/* local_IPI_amo were set to 0 by an earlier memset() */
 
 	/* Initialize this partitions AMO_t structure */
@@ -203,7 +195,7 @@
 
 	sprintf(part->IPI_owner, "xpc%02d", partid);
 	ret = request_irq(SGI_XPC_NOTIFY, xpc_notify_IRQ_handler, IRQF_SHARED,
-				part->IPI_owner, (void *) (u64) partid);
+			  part->IPI_owner, (void *)(u64)partid);
 	if (ret != 0) {
 		dev_err(xpc_chan, "can't register NOTIFY IRQ handler, "
 			"errno=%d\n", -ret);
@@ -223,8 +215,8 @@
 	/* Setup a timer to check for dropped IPIs */
 	timer = &part->dropped_IPI_timer;
 	init_timer(timer);
-	timer->function = (void (*)(unsigned long)) xpc_dropped_IPI_check;
-	timer->data = (unsigned long) part;
+	timer->function = (void (*)(unsigned long))xpc_dropped_IPI_check;
+	timer->data = (unsigned long)part;
 	timer->expires = jiffies + XPC_P_DROPPED_IPI_WAIT;
 	add_timer(timer);
 
@@ -234,7 +226,6 @@
 	 */
 	part->setup_state = XPC_P_SETUP;
 
-
 	/*
 	 * Setup the per partition specific variables required by the
 	 * remote partition to establish channel connections with us.
@@ -244,7 +235,7 @@
 	 */
 	xpc_vars_part[partid].GPs_pa = __pa(part->local_GPs);
 	xpc_vars_part[partid].openclose_args_pa =
-					__pa(part->local_openclose_args);
+	    __pa(part->local_openclose_args);
 	xpc_vars_part[partid].IPI_amo_pa = __pa(part->local_IPI_amo_va);
 	cpuid = raw_smp_processor_id();	/* any CPU in this partition will do */
 	xpc_vars_part[partid].IPI_nasid = cpuid_to_nasid(cpuid);
@@ -255,7 +246,6 @@
 	return xpcSuccess;
 }
 
-
 /*
  * Create a wrapper that hides the underlying mechanism for pulling a cacheline
  * (or multiple cachelines) from a remote partition.
@@ -266,24 +256,21 @@
  */
 static enum xpc_retval
 xpc_pull_remote_cachelines(struct xpc_partition *part, void *dst,
-				const void *src, size_t cnt)
+			   const void *src, size_t cnt)
 {
 	bte_result_t bte_ret;
 
-
-	DBUG_ON((u64) src != L1_CACHE_ALIGN((u64) src));
-	DBUG_ON((u64) dst != L1_CACHE_ALIGN((u64) dst));
+	DBUG_ON((u64)src != L1_CACHE_ALIGN((u64)src));
+	DBUG_ON((u64)dst != L1_CACHE_ALIGN((u64)dst));
 	DBUG_ON(cnt != L1_CACHE_ALIGN(cnt));
 
-	if (part->act_state == XPC_P_DEACTIVATING) {
+	if (part->act_state == XPC_P_DEACTIVATING)
 		return part->reason;
-	}
 
-	bte_ret = xp_bte_copy((u64) src, (u64) dst, (u64) cnt,
-					(BTE_NORMAL | BTE_WACQUIRE), NULL);
-	if (bte_ret == BTE_SUCCESS) {
+	bte_ret = xp_bte_copy((u64)src, (u64)dst, (u64)cnt,
+			      (BTE_NORMAL | BTE_WACQUIRE), NULL);
+	if (bte_ret == BTE_SUCCESS)
 		return xpcSuccess;
-	}
 
 	dev_dbg(xpc_chan, "xp_bte_copy() from partition %d failed, ret=%d\n",
 		XPC_PARTID(part), bte_ret);
@@ -291,7 +278,6 @@
 	return xpc_map_bte_errors(bte_ret);
 }
 
-
 /*
  * Pull the remote per partition specific variables from the specified
  * partition.
@@ -301,41 +287,40 @@
 {
 	u8 buffer[L1_CACHE_BYTES * 2];
 	struct xpc_vars_part *pulled_entry_cacheline =
-			(struct xpc_vars_part *) L1_CACHE_ALIGN((u64) buffer);
+	    (struct xpc_vars_part *)L1_CACHE_ALIGN((u64)buffer);
 	struct xpc_vars_part *pulled_entry;
 	u64 remote_entry_cacheline_pa, remote_entry_pa;
 	partid_t partid = XPC_PARTID(part);
 	enum xpc_retval ret;
 
-
 	/* pull the cacheline that contains the variables we're interested in */
 
 	DBUG_ON(part->remote_vars_part_pa !=
-				L1_CACHE_ALIGN(part->remote_vars_part_pa));
+		L1_CACHE_ALIGN(part->remote_vars_part_pa));
 	DBUG_ON(sizeof(struct xpc_vars_part) != L1_CACHE_BYTES / 2);
 
 	remote_entry_pa = part->remote_vars_part_pa +
-			sn_partition_id * sizeof(struct xpc_vars_part);
+	    sn_partition_id * sizeof(struct xpc_vars_part);
 
 	remote_entry_cacheline_pa = (remote_entry_pa & ~(L1_CACHE_BYTES - 1));
 
-	pulled_entry = (struct xpc_vars_part *) ((u64) pulled_entry_cacheline +
-				(remote_entry_pa & (L1_CACHE_BYTES - 1)));
+	pulled_entry = (struct xpc_vars_part *)((u64)pulled_entry_cacheline +
+						(remote_entry_pa &
+						 (L1_CACHE_BYTES - 1)));
 
 	ret = xpc_pull_remote_cachelines(part, pulled_entry_cacheline,
-					(void *) remote_entry_cacheline_pa,
-					L1_CACHE_BYTES);
+					 (void *)remote_entry_cacheline_pa,
+					 L1_CACHE_BYTES);
 	if (ret != xpcSuccess) {
 		dev_dbg(xpc_chan, "failed to pull XPC vars_part from "
 			"partition %d, ret=%d\n", partid, ret);
 		return ret;
 	}
 
-
 	/* see if they've been set up yet */
 
 	if (pulled_entry->magic != XPC_VP_MAGIC1 &&
-				pulled_entry->magic != XPC_VP_MAGIC2) {
+	    pulled_entry->magic != XPC_VP_MAGIC2) {
 
 		if (pulled_entry->magic != 0) {
 			dev_dbg(xpc_chan, "partition %d's XPC vars_part for "
@@ -353,8 +338,8 @@
 		/* validate the variables */
 
 		if (pulled_entry->GPs_pa == 0 ||
-				pulled_entry->openclose_args_pa == 0 ||
-					pulled_entry->IPI_amo_pa == 0) {
+		    pulled_entry->openclose_args_pa == 0 ||
+		    pulled_entry->IPI_amo_pa == 0) {
 
 			dev_err(xpc_chan, "partition %d's XPC vars_part for "
 				"partition %d are not valid\n", partid,
@@ -366,29 +351,26 @@
 
 		part->remote_GPs_pa = pulled_entry->GPs_pa;
 		part->remote_openclose_args_pa =
-					pulled_entry->openclose_args_pa;
+		    pulled_entry->openclose_args_pa;
 		part->remote_IPI_amo_va =
-				      (AMO_t *) __va(pulled_entry->IPI_amo_pa);
+		    (AMO_t *)__va(pulled_entry->IPI_amo_pa);
 		part->remote_IPI_nasid = pulled_entry->IPI_nasid;
 		part->remote_IPI_phys_cpuid = pulled_entry->IPI_phys_cpuid;
 
-		if (part->nchannels > pulled_entry->nchannels) {
+		if (part->nchannels > pulled_entry->nchannels)
 			part->nchannels = pulled_entry->nchannels;
-		}
 
 		/* let the other side know that we've pulled their variables */
 
 		xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
 	}
 
-	if (pulled_entry->magic == XPC_VP_MAGIC1) {
+	if (pulled_entry->magic == XPC_VP_MAGIC1)
 		return xpcRetry;
-	}
 
 	return xpcSuccess;
 }
 
-
 /*
  * Get the IPI flags and pull the openclose args and/or remote GPs as needed.
  */
@@ -399,23 +381,23 @@
 	u64 IPI_amo;
 	enum xpc_retval ret;
 
-
 	/*
 	 * See if there are any IPI flags to be handled.
 	 */
 
 	spin_lock_irqsave(&part->IPI_lock, irq_flags);
-	if ((IPI_amo = part->local_IPI_amo) != 0) {
+	IPI_amo = part->local_IPI_amo;
+	if (IPI_amo != 0)
 		part->local_IPI_amo = 0;
-	}
-	spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
 
+	spin_unlock_irqrestore(&part->IPI_lock, irq_flags);
 
 	if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_amo)) {
 		ret = xpc_pull_remote_cachelines(part,
-					part->remote_openclose_args,
-					(void *) part->remote_openclose_args_pa,
-					XPC_OPENCLOSE_ARGS_SIZE);
+						 part->remote_openclose_args,
+						 (void *)part->
+						 remote_openclose_args_pa,
+						 XPC_OPENCLOSE_ARGS_SIZE);
 		if (ret != xpcSuccess) {
 			XPC_DEACTIVATE_PARTITION(part, ret);
 
@@ -430,8 +412,8 @@
 
 	if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_amo)) {
 		ret = xpc_pull_remote_cachelines(part, part->remote_GPs,
-						(void *) part->remote_GPs_pa,
-						XPC_GP_SIZE);
+						 (void *)part->remote_GPs_pa,
+						 XPC_GP_SIZE);
 		if (ret != xpcSuccess) {
 			XPC_DEACTIVATE_PARTITION(part, ret);
 
@@ -446,7 +428,6 @@
 	return IPI_amo;
 }
 
-
 /*
  * Allocate the local message queue and the notify queue.
  */
@@ -457,20 +438,14 @@
 	int nentries;
 	size_t nbytes;
 
-
-	// >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
-	// >>> iterations of the for-loop, bail if set?
-
-	// >>> should we impose a minimum #of entries? like 4 or 8?
 	for (nentries = ch->local_nentries; nentries > 0; nentries--) {
 
 		nbytes = nentries * ch->msg_size;
 		ch->local_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
-						GFP_KERNEL,
-						&ch->local_msgqueue_base);
-		if (ch->local_msgqueue == NULL) {
+								   GFP_KERNEL,
+						      &ch->local_msgqueue_base);
+		if (ch->local_msgqueue == NULL)
 			continue;
-		}
 
 		nbytes = nentries * sizeof(struct xpc_notify);
 		ch->notify_queue = kzalloc(nbytes, GFP_KERNEL);
@@ -497,7 +472,6 @@
 	return xpcNoMemory;
 }
 
-
 /*
  * Allocate the cached remote message queue.
  */
@@ -508,22 +482,16 @@
 	int nentries;
 	size_t nbytes;
 
-
 	DBUG_ON(ch->remote_nentries <= 0);
 
-	// >>> may want to check for ch->flags & XPC_C_DISCONNECTING between
-	// >>> iterations of the for-loop, bail if set?
-
-	// >>> should we impose a minimum #of entries? like 4 or 8?
 	for (nentries = ch->remote_nentries; nentries > 0; nentries--) {
 
 		nbytes = nentries * ch->msg_size;
 		ch->remote_msgqueue = xpc_kzalloc_cacheline_aligned(nbytes,
-						GFP_KERNEL,
-						&ch->remote_msgqueue_base);
-		if (ch->remote_msgqueue == NULL) {
+								    GFP_KERNEL,
+						     &ch->remote_msgqueue_base);
+		if (ch->remote_msgqueue == NULL)
 			continue;
-		}
 
 		spin_lock_irqsave(&ch->lock, irq_flags);
 		if (nentries < ch->remote_nentries) {
@@ -542,7 +510,6 @@
 	return xpcNoMemory;
 }
 
-
 /*
  * Allocate message queues and other stuff associated with a channel.
  *
@@ -554,14 +521,14 @@
 	unsigned long irq_flags;
 	enum xpc_retval ret;
 
-
 	DBUG_ON(ch->flags & XPC_C_SETUP);
 
-	if ((ret = xpc_allocate_local_msgqueue(ch)) != xpcSuccess) {
+	ret = xpc_allocate_local_msgqueue(ch);
+	if (ret != xpcSuccess)
 		return ret;
-	}
 
-	if ((ret = xpc_allocate_remote_msgqueue(ch)) != xpcSuccess) {
+	ret = xpc_allocate_remote_msgqueue(ch);
+	if (ret != xpcSuccess) {
 		kfree(ch->local_msgqueue_base);
 		ch->local_msgqueue = NULL;
 		kfree(ch->notify_queue);
@@ -576,7 +543,6 @@
 	return xpcSuccess;
 }
 
-
 /*
  * Process a connect message from a remote partition.
  *
@@ -588,11 +554,10 @@
 {
 	enum xpc_retval ret;
 
-
 	DBUG_ON(!spin_is_locked(&ch->lock));
 
 	if (!(ch->flags & XPC_C_OPENREQUEST) ||
-				!(ch->flags & XPC_C_ROPENREQUEST)) {
+	    !(ch->flags & XPC_C_ROPENREQUEST)) {
 		/* nothing more to do for now */
 		return;
 	}
@@ -603,12 +568,11 @@
 		ret = xpc_allocate_msgqueues(ch);
 		spin_lock_irqsave(&ch->lock, *irq_flags);
 
-		if (ret != xpcSuccess) {
+		if (ret != xpcSuccess)
 			XPC_DISCONNECT_CHANNEL(ch, ret, irq_flags);
-		}
-		if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING)) {
+
+		if (ch->flags & (XPC_C_CONNECTED | XPC_C_DISCONNECTING))
 			return;
-		}
 
 		DBUG_ON(!(ch->flags & XPC_C_SETUP));
 		DBUG_ON(ch->local_msgqueue == NULL);
@@ -620,23 +584,21 @@
 		xpc_IPI_send_openreply(ch, irq_flags);
 	}
 
-	if (!(ch->flags & XPC_C_ROPENREPLY)) {
+	if (!(ch->flags & XPC_C_ROPENREPLY))
 		return;
-	}
 
 	DBUG_ON(ch->remote_msgqueue_pa == 0);
 
 	ch->flags = (XPC_C_CONNECTED | XPC_C_SETUP);	/* clear all else */
 
 	dev_info(xpc_chan, "channel %d to partition %d connected\n",
-		ch->number, ch->partid);
+		 ch->number, ch->partid);
 
 	spin_unlock_irqrestore(&ch->lock, *irq_flags);
 	xpc_create_kthreads(ch, 1, 0);
 	spin_lock_irqsave(&ch->lock, *irq_flags);
 }
 
-
 /*
  * Notify those who wanted to be notified upon delivery of their message.
  */
@@ -647,7 +609,6 @@
 	u8 notify_type;
 	s64 get = ch->w_remote_GP.get - 1;
 
-
 	while (++get < put && atomic_read(&ch->n_to_notify) > 0) {
 
 		notify = &ch->notify_queue[get % ch->local_nentries];
@@ -660,8 +621,7 @@
 		 */
 		notify_type = notify->type;
 		if (notify_type == 0 ||
-				cmpxchg(&notify->type, notify_type, 0) !=
-								notify_type) {
+		    cmpxchg(&notify->type, notify_type, 0) != notify_type) {
 			continue;
 		}
 
@@ -672,20 +632,19 @@
 		if (notify->func != NULL) {
 			dev_dbg(xpc_chan, "notify->func() called, notify=0x%p, "
 				"msg_number=%ld, partid=%d, channel=%d\n",
-				(void *) notify, get, ch->partid, ch->number);
+				(void *)notify, get, ch->partid, ch->number);
 
 			notify->func(reason, ch->partid, ch->number,
-								notify->key);
+				     notify->key);
 
 			dev_dbg(xpc_chan, "notify->func() returned, "
 				"notify=0x%p, msg_number=%ld, partid=%d, "
-				"channel=%d\n", (void *) notify, get,
+				"channel=%d\n", (void *)notify, get,
 				ch->partid, ch->number);
 		}
 	}
 }
 
-
 /*
  * Free up message queues and other stuff that were allocated for the specified
  * channel.
@@ -733,7 +692,6 @@
 	}
 }
 
-
 /*
  * spin_lock_irqsave() is expected to be held on entry.
  */
@@ -743,46 +701,41 @@
 	struct xpc_partition *part = &xpc_partitions[ch->partid];
 	u32 channel_was_connected = (ch->flags & XPC_C_WASCONNECTED);
 
-
 	DBUG_ON(!spin_is_locked(&ch->lock));
 
-	if (!(ch->flags & XPC_C_DISCONNECTING)) {
+	if (!(ch->flags & XPC_C_DISCONNECTING))
 		return;
-	}
 
 	DBUG_ON(!(ch->flags & XPC_C_CLOSEREQUEST));
 
 	/* make sure all activity has settled down first */
 
 	if (atomic_read(&ch->kthreads_assigned) > 0 ||
-				atomic_read(&ch->references) > 0) {
+	    atomic_read(&ch->references) > 0) {
 		return;
 	}
 	DBUG_ON((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
-			!(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
+		!(ch->flags & XPC_C_DISCONNECTINGCALLOUT_MADE));
 
 	if (part->act_state == XPC_P_DEACTIVATING) {
 		/* can't proceed until the other side disengages from us */
-		if (xpc_partition_engaged(1UL << ch->partid)) {
+		if (xpc_partition_engaged(1UL << ch->partid))
 			return;
-		}
 
 	} else {
 
 		/* as long as the other side is up do the full protocol */
 
-		if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
+		if (!(ch->flags & XPC_C_RCLOSEREQUEST))
 			return;
-		}
 
 		if (!(ch->flags & XPC_C_CLOSEREPLY)) {
 			ch->flags |= XPC_C_CLOSEREPLY;
 			xpc_IPI_send_closereply(ch, irq_flags);
 		}
 
-		if (!(ch->flags & XPC_C_RCLOSEREPLY)) {
+		if (!(ch->flags & XPC_C_RCLOSEREPLY))
 			return;
-		}
 	}
 
 	/* wake those waiting for notify completion */
@@ -809,7 +762,7 @@
 
 	if (channel_was_connected) {
 		dev_info(xpc_chan, "channel %d to partition %d disconnected, "
-			"reason=%d\n", ch->number, ch->partid, ch->reason);
+			 "reason=%d\n", ch->number, ch->partid, ch->reason);
 	}
 
 	if (ch->flags & XPC_C_WDISCONNECT) {
@@ -820,35 +773,32 @@
 			/* time to take action on any delayed IPI flags */
 			spin_lock(&part->IPI_lock);
 			XPC_SET_IPI_FLAGS(part->local_IPI_amo, ch->number,
-							ch->delayed_IPI_flags);
+					  ch->delayed_IPI_flags);
 			spin_unlock(&part->IPI_lock);
 		}
 		ch->delayed_IPI_flags = 0;
 	}
 }
 
-
 /*
  * Process a change in the channel's remote connection state.
  */
 static void
 xpc_process_openclose_IPI(struct xpc_partition *part, int ch_number,
-				u8 IPI_flags)
+			  u8 IPI_flags)
 {
 	unsigned long irq_flags;
 	struct xpc_openclose_args *args =
-				&part->remote_openclose_args[ch_number];
+	    &part->remote_openclose_args[ch_number];
 	struct xpc_channel *ch = &part->channels[ch_number];
 	enum xpc_retval reason;
 
-
-
 	spin_lock_irqsave(&ch->lock, irq_flags);
 
 again:
 
 	if ((ch->flags & XPC_C_DISCONNECTED) &&
-					(ch->flags & XPC_C_WDISCONNECT)) {
+	    (ch->flags & XPC_C_WDISCONNECT)) {
 		/*
 		 * Delay processing IPI flags until thread waiting disconnect
 		 * has had a chance to see that the channel is disconnected.
@@ -858,7 +808,6 @@
 		return;
 	}
 
-
 	if (IPI_flags & XPC_IPI_CLOSEREQUEST) {
 
 		dev_dbg(xpc_chan, "XPC_IPI_CLOSEREQUEST (reason=%d) received "
@@ -890,13 +839,14 @@
 		if (ch->flags & XPC_C_DISCONNECTED) {
 			if (!(IPI_flags & XPC_IPI_OPENREQUEST)) {
 				if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo,
-					 ch_number) & XPC_IPI_OPENREQUEST)) {
+						       ch_number) &
+				     XPC_IPI_OPENREQUEST)) {
 
 					DBUG_ON(ch->delayed_IPI_flags != 0);
 					spin_lock(&part->IPI_lock);
 					XPC_SET_IPI_FLAGS(part->local_IPI_amo,
-							ch_number,
-							XPC_IPI_CLOSEREQUEST);
+							  ch_number,
+							  XPC_IPI_CLOSEREQUEST);
 					spin_unlock(&part->IPI_lock);
 				}
 				spin_unlock_irqrestore(&ch->lock, irq_flags);
@@ -921,11 +871,10 @@
 
 		if (!(ch->flags & XPC_C_DISCONNECTING)) {
 			reason = args->reason;
-			if (reason <= xpcSuccess || reason > xpcUnknownReason) {
+			if (reason <= xpcSuccess || reason > xpcUnknownReason)
 				reason = xpcUnknownReason;
-			} else if (reason == xpcUnregistering) {
+			else if (reason == xpcUnregistering)
 				reason = xpcOtherUnregistering;
-			}
 
 			XPC_DISCONNECT_CHANNEL(ch, reason, &irq_flags);
 
@@ -937,7 +886,6 @@
 		xpc_process_disconnect(ch, &irq_flags);
 	}
 
-
 	if (IPI_flags & XPC_IPI_CLOSEREPLY) {
 
 		dev_dbg(xpc_chan, "XPC_IPI_CLOSEREPLY received from partid=%d,"
@@ -953,12 +901,13 @@
 
 		if (!(ch->flags & XPC_C_RCLOSEREQUEST)) {
 			if ((XPC_GET_IPI_FLAGS(part->local_IPI_amo, ch_number)
-						& XPC_IPI_CLOSEREQUEST)) {
+			     & XPC_IPI_CLOSEREQUEST)) {
 
 				DBUG_ON(ch->delayed_IPI_flags != 0);
 				spin_lock(&part->IPI_lock);
 				XPC_SET_IPI_FLAGS(part->local_IPI_amo,
-						ch_number, XPC_IPI_CLOSEREPLY);
+						  ch_number,
+						  XPC_IPI_CLOSEREPLY);
 				spin_unlock(&part->IPI_lock);
 			}
 			spin_unlock_irqrestore(&ch->lock, irq_flags);
@@ -973,7 +922,6 @@
 		}
 	}
 
-
 	if (IPI_flags & XPC_IPI_OPENREQUEST) {
 
 		dev_dbg(xpc_chan, "XPC_IPI_OPENREQUEST (msg_size=%d, "
@@ -982,7 +930,7 @@
 			ch->partid, ch->number);
 
 		if (part->act_state == XPC_P_DEACTIVATING ||
-					(ch->flags & XPC_C_ROPENREQUEST)) {
+		    (ch->flags & XPC_C_ROPENREQUEST)) {
 			spin_unlock_irqrestore(&ch->lock, irq_flags);
 			return;
 		}
@@ -993,9 +941,9 @@
 			return;
 		}
 		DBUG_ON(!(ch->flags & (XPC_C_DISCONNECTED |
-							XPC_C_OPENREQUEST)));
+				       XPC_C_OPENREQUEST)));
 		DBUG_ON(ch->flags & (XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
-					XPC_C_OPENREPLY | XPC_C_CONNECTED));
+				     XPC_C_OPENREPLY | XPC_C_CONNECTED));
 
 		/*
 		 * The meaningful OPENREQUEST connection state fields are:
@@ -1011,11 +959,10 @@
 		ch->flags |= (XPC_C_ROPENREQUEST | XPC_C_CONNECTING);
 		ch->remote_nentries = args->local_nentries;
 
-
 		if (ch->flags & XPC_C_OPENREQUEST) {
 			if (args->msg_size != ch->msg_size) {
 				XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
-								&irq_flags);
+						       &irq_flags);
 				spin_unlock_irqrestore(&ch->lock, irq_flags);
 				return;
 			}
@@ -1031,7 +978,6 @@
 		xpc_process_connect(ch, &irq_flags);
 	}
 
-
 	if (IPI_flags & XPC_IPI_OPENREPLY) {
 
 		dev_dbg(xpc_chan, "XPC_IPI_OPENREPLY (local_msgqueue_pa=0x%lx, "
@@ -1046,7 +992,7 @@
 		}
 		if (!(ch->flags & XPC_C_OPENREQUEST)) {
 			XPC_DISCONNECT_CHANNEL(ch, xpcOpenCloseError,
-								&irq_flags);
+					       &irq_flags);
 			spin_unlock_irqrestore(&ch->lock, irq_flags);
 			return;
 		}
@@ -1057,7 +1003,7 @@
 		/*
 		 * The meaningful OPENREPLY connection state fields are:
 		 *      local_msgqueue_pa = physical address of remote
-		 *			    partition's local_msgqueue
+		 *                          partition's local_msgqueue
 		 *      local_nentries = remote partition's local_nentries
 		 *      remote_nentries = remote partition's remote_nentries
 		 */
@@ -1093,7 +1039,6 @@
 	spin_unlock_irqrestore(&ch->lock, irq_flags);
 }
 
-
 /*
  * Attempt to establish a channel connection to a remote partition.
  */
@@ -1103,10 +1048,8 @@
 	unsigned long irq_flags;
 	struct xpc_registration *registration = &xpc_registrations[ch->number];
 
-
-	if (mutex_trylock(&registration->mutex) == 0) {
+	if (mutex_trylock(&registration->mutex) == 0)
 		return xpcRetry;
-	}
 
 	if (!XPC_CHANNEL_REGISTERED(ch->number)) {
 		mutex_unlock(&registration->mutex);
@@ -1124,7 +1067,6 @@
 		return ch->reason;
 	}
 
-
 	/* add info from the channel connect registration to the channel */
 
 	ch->kthreads_assigned_limit = registration->assigned_limit;
@@ -1154,7 +1096,7 @@
 			 */
 			mutex_unlock(&registration->mutex);
 			XPC_DISCONNECT_CHANNEL(ch, xpcUnequalMsgSizes,
-								&irq_flags);
+					       &irq_flags);
 			spin_unlock_irqrestore(&ch->lock, irq_flags);
 			return xpcUnequalMsgSizes;
 		}
@@ -1169,7 +1111,6 @@
 
 	mutex_unlock(&registration->mutex);
 
-
 	/* initiate the connection */
 
 	ch->flags |= (XPC_C_OPENREQUEST | XPC_C_CONNECTING);
@@ -1182,7 +1123,6 @@
 	return xpcSuccess;
 }
 
-
 /*
  * Clear some of the msg flags in the local message queue.
  */
@@ -1192,16 +1132,15 @@
 	struct xpc_msg *msg;
 	s64 get;
 
-
 	get = ch->w_remote_GP.get;
 	do {
-		msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
-				(get % ch->local_nentries) * ch->msg_size);
+		msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+					 (get % ch->local_nentries) *
+					 ch->msg_size);
 		msg->flags = 0;
-	} while (++get < (volatile s64) ch->remote_GP.get);
+	} while (++get < ch->remote_GP.get);
 }
 
-
 /*
  * Clear some of the msg flags in the remote message queue.
  */
@@ -1211,43 +1150,39 @@
 	struct xpc_msg *msg;
 	s64 put;
 
-
 	put = ch->w_remote_GP.put;
 	do {
-		msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
-				(put % ch->remote_nentries) * ch->msg_size);
+		msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
+					 (put % ch->remote_nentries) *
+					 ch->msg_size);
 		msg->flags = 0;
-	} while (++put < (volatile s64) ch->remote_GP.put);
+	} while (++put < ch->remote_GP.put);
 }
 
-
 static void
 xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
 {
 	struct xpc_channel *ch = &part->channels[ch_number];
 	int nmsgs_sent;
 
-
 	ch->remote_GP = part->remote_GPs[ch_number];
 
-
 	/* See what, if anything, has changed for each connected channel */
 
 	xpc_msgqueue_ref(ch);
 
 	if (ch->w_remote_GP.get == ch->remote_GP.get &&
-				ch->w_remote_GP.put == ch->remote_GP.put) {
+	    ch->w_remote_GP.put == ch->remote_GP.put) {
 		/* nothing changed since GPs were last pulled */
 		xpc_msgqueue_deref(ch);
 		return;
 	}
 
-	if (!(ch->flags & XPC_C_CONNECTED)){
+	if (!(ch->flags & XPC_C_CONNECTED)) {
 		xpc_msgqueue_deref(ch);
 		return;
 	}
 
-
 	/*
 	 * First check to see if messages recently sent by us have been
 	 * received by the other side. (The remote GET value will have
@@ -1269,7 +1204,7 @@
 			 * received and delivered by the other side.
 			 */
 			xpc_notify_senders(ch, xpcMsgDelivered,
-							ch->remote_GP.get);
+					   ch->remote_GP.get);
 		}
 
 		/*
@@ -1288,12 +1223,10 @@
 		 * If anyone was waiting for message queue entries to become
 		 * available, wake them up.
 		 */
-		if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+		if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
 			wake_up(&ch->msg_allocate_wq);
-		}
 	}
 
-
 	/*
 	 * Now check for newly sent messages by the other side. (The remote
 	 * PUT value will have changed since we last looked at it.)
@@ -1318,16 +1251,14 @@
 				"delivered=%d, partid=%d, channel=%d\n",
 				nmsgs_sent, ch->partid, ch->number);
 
-			if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) {
+			if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)
 				xpc_activate_kthreads(ch, nmsgs_sent);
-			}
 		}
 	}
 
 	xpc_msgqueue_deref(ch);
 }
 
-
 void
 xpc_process_channel_activity(struct xpc_partition *part)
 {
@@ -1337,7 +1268,6 @@
 	int ch_number;
 	u32 ch_flags;
 
-
 	IPI_amo = xpc_get_IPI_flags(part);
 
 	/*
@@ -1350,7 +1280,6 @@
 	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
 		ch = &part->channels[ch_number];
 
-
 		/*
 		 * Process any open or close related IPI flags, and then deal
 		 * with connecting or disconnecting the channel as required.
@@ -1358,9 +1287,8 @@
 
 		IPI_flags = XPC_GET_IPI_FLAGS(IPI_amo, ch_number);
 
-		if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags)) {
+		if (XPC_ANY_OPENCLOSE_IPI_FLAGS_SET(IPI_flags))
 			xpc_process_openclose_IPI(part, ch_number, IPI_flags);
-		}
 
 		ch_flags = ch->flags;	/* need an atomic snapshot of flags */
 
@@ -1371,14 +1299,13 @@
 			continue;
 		}
 
-		if (part->act_state == XPC_P_DEACTIVATING) {
+		if (part->act_state == XPC_P_DEACTIVATING)
 			continue;
-		}
 
 		if (!(ch_flags & XPC_C_CONNECTED)) {
 			if (!(ch_flags & XPC_C_OPENREQUEST)) {
 				DBUG_ON(ch_flags & XPC_C_SETUP);
-				(void) xpc_connect_channel(ch);
+				(void)xpc_connect_channel(ch);
 			} else {
 				spin_lock_irqsave(&ch->lock, irq_flags);
 				xpc_process_connect(ch, &irq_flags);
@@ -1387,20 +1314,17 @@
 			continue;
 		}
 
-
 		/*
 		 * Process any message related IPI flags, this may involve the
 		 * activation of kthreads to deliver any pending messages sent
 		 * from the other partition.
 		 */
 
-		if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags)) {
+		if (XPC_ANY_MSG_IPI_FLAGS_SET(IPI_flags))
 			xpc_process_msg_IPI(part, ch_number);
-		}
 	}
 }
 
-
 /*
  * XPC's heartbeat code calls this function to inform XPC that a partition is
  * going down.  XPC responds by tearing down the XPartition Communication
@@ -1417,7 +1341,6 @@
 	int ch_number;
 	struct xpc_channel *ch;
 
-
 	dev_dbg(xpc_chan, "deactivating partition %d, reason=%d\n",
 		XPC_PARTID(part), reason);
 
@@ -1426,7 +1349,6 @@
 		return;
 	}
 
-
 	/* disconnect channels associated with the partition going down */
 
 	for (ch_number = 0; ch_number < part->nchannels; ch_number++) {
@@ -1446,7 +1368,6 @@
 	xpc_part_deref(part);
 }
 
-
 /*
  * Teardown the infrastructure necessary to support XPartition Communication
  * between the specified remote partition and the local one.
@@ -1456,7 +1377,6 @@
 {
 	partid_t partid = XPC_PARTID(part);
 
-
 	/*
 	 * We start off by making this partition inaccessible to local
 	 * processes by marking it as no longer setup. Then we make it
@@ -1473,9 +1393,7 @@
 
 	xpc_vars_part[partid].magic = 0;
 
-
-	free_irq(SGI_XPC_NOTIFY, (void *) (u64) partid);
-
+	free_irq(SGI_XPC_NOTIFY, (void *)(u64)partid);
 
 	/*
 	 * Before proceeding with the teardown we have to wait until all
@@ -1483,7 +1401,6 @@
 	 */
 	wait_event(part->teardown_wq, (atomic_read(&part->references) == 0));
 
-
 	/* now we can begin tearing down the infrastructure */
 
 	part->setup_state = XPC_P_TORNDOWN;
@@ -1504,7 +1421,6 @@
 	part->local_IPI_amo_va = NULL;
 }
 
-
 /*
  * Called by XP at the time of channel connection registration to cause
  * XPC to establish connections to all currently active partitions.
@@ -1516,7 +1432,6 @@
 	struct xpc_partition *part;
 	struct xpc_channel *ch;
 
-
 	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
 
 	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
@@ -1535,7 +1450,6 @@
 	}
 }
 
-
 void
 xpc_connected_callout(struct xpc_channel *ch)
 {
@@ -1546,14 +1460,13 @@
 			"partid=%d, channel=%d\n", ch->partid, ch->number);
 
 		ch->func(xpcConnected, ch->partid, ch->number,
-				(void *) (u64) ch->local_nentries, ch->key);
+			 (void *)(u64)ch->local_nentries, ch->key);
 
 		dev_dbg(xpc_chan, "ch->func() returned, reason=xpcConnected, "
 			"partid=%d, channel=%d\n", ch->partid, ch->number);
 	}
 }
 
-
 /*
  * Called by XP at the time of channel connection unregistration to cause
  * XPC to teardown all current connections for the specified channel.
@@ -1575,7 +1488,6 @@
 	struct xpc_partition *part;
 	struct xpc_channel *ch;
 
-
 	DBUG_ON(ch_number < 0 || ch_number >= XPC_NCHANNELS);
 
 	/* initiate the channel disconnect for every active partition */
@@ -1592,7 +1504,7 @@
 				ch->flags |= XPC_C_WDISCONNECT;
 
 				XPC_DISCONNECT_CHANNEL(ch, xpcUnregistering,
-								&irq_flags);
+						       &irq_flags);
 			}
 
 			spin_unlock_irqrestore(&ch->lock, irq_flags);
@@ -1605,7 +1517,6 @@
 	xpc_disconnect_wait(ch_number);
 }
 
-
 /*
  * To disconnect a channel, and reflect it back to all who may be waiting.
  *
@@ -1617,16 +1528,15 @@
  */
 void
 xpc_disconnect_channel(const int line, struct xpc_channel *ch,
-			enum xpc_retval reason, unsigned long *irq_flags)
+		       enum xpc_retval reason, unsigned long *irq_flags)
 {
 	u32 channel_was_connected = (ch->flags & XPC_C_CONNECTED);
 
-
 	DBUG_ON(!spin_is_locked(&ch->lock));
 
-	if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED)) {
+	if (ch->flags & (XPC_C_DISCONNECTING | XPC_C_DISCONNECTED))
 		return;
-	}
+
 	DBUG_ON(!(ch->flags & (XPC_C_CONNECTING | XPC_C_CONNECTED)));
 
 	dev_dbg(xpc_chan, "reason=%d, line=%d, partid=%d, channel=%d\n",
@@ -1637,14 +1547,13 @@
 	ch->flags |= (XPC_C_CLOSEREQUEST | XPC_C_DISCONNECTING);
 	/* some of these may not have been set */
 	ch->flags &= ~(XPC_C_OPENREQUEST | XPC_C_OPENREPLY |
-			XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
-			XPC_C_CONNECTING | XPC_C_CONNECTED);
+		       XPC_C_ROPENREQUEST | XPC_C_ROPENREPLY |
+		       XPC_C_CONNECTING | XPC_C_CONNECTED);
 
 	xpc_IPI_send_closerequest(ch, irq_flags);
 
-	if (channel_was_connected) {
+	if (channel_was_connected)
 		ch->flags |= XPC_C_WASCONNECTED;
-	}
 
 	spin_unlock_irqrestore(&ch->lock, *irq_flags);
 
@@ -1653,20 +1562,18 @@
 		wake_up_all(&ch->idle_wq);
 
 	} else if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
-			!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
+		   !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
 		/* start a kthread that will do the xpcDisconnecting callout */
 		xpc_create_kthreads(ch, 1, 1);
 	}
 
 	/* wake those waiting to allocate an entry from the local msg queue */
-	if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) {
+	if (atomic_read(&ch->n_on_msg_allocate_wq) > 0)
 		wake_up(&ch->msg_allocate_wq);
-	}
 
 	spin_lock_irqsave(&ch->lock, *irq_flags);
 }
 
-
 void
 xpc_disconnect_callout(struct xpc_channel *ch, enum xpc_retval reason)
 {
@@ -1687,7 +1594,6 @@
 	}
 }
 
-
 /*
  * Wait for a message entry to become available for the specified channel,
  * but don't wait any longer than 1 jiffy.
@@ -1697,9 +1603,8 @@
 {
 	enum xpc_retval ret;
 
-
 	if (ch->flags & XPC_C_DISCONNECTING) {
-		DBUG_ON(ch->reason == xpcInterrupted);  // >>> Is this true?
+		DBUG_ON(ch->reason == xpcInterrupted);
 		return ch->reason;
 	}
 
@@ -1709,7 +1614,7 @@
 
 	if (ch->flags & XPC_C_DISCONNECTING) {
 		ret = ch->reason;
-		DBUG_ON(ch->reason == xpcInterrupted);  // >>> Is this true?
+		DBUG_ON(ch->reason == xpcInterrupted);
 	} else if (ret == 0) {
 		ret = xpcTimeout;
 	} else {
@@ -1719,20 +1624,18 @@
 	return ret;
 }
 
-
 /*
  * Allocate an entry for a message from the message queue associated with the
  * specified channel.
  */
 static enum xpc_retval
 xpc_allocate_msg(struct xpc_channel *ch, u32 flags,
-			struct xpc_msg **address_of_msg)
+		 struct xpc_msg **address_of_msg)
 {
 	struct xpc_msg *msg;
 	enum xpc_retval ret;
 	s64 put;
 
-
 	/* this reference will be dropped in xpc_send_msg() */
 	xpc_msgqueue_ref(ch);
 
@@ -1745,7 +1648,6 @@
 		return xpcNotConnected;
 	}
 
-
 	/*
 	 * Get the next available message entry from the local message queue.
 	 * If none are available, we'll make sure that we grab the latest
@@ -1755,25 +1657,23 @@
 
 	while (1) {
 
-		put = (volatile s64) ch->w_local_GP.put;
-		if (put - (volatile s64) ch->w_remote_GP.get <
-							ch->local_nentries) {
+		put = ch->w_local_GP.put;
+		rmb();	/* guarantee that .put loads before .get */
+		if (put - ch->w_remote_GP.get < ch->local_nentries) {
 
 			/* There are available message entries. We need to try
 			 * to secure one for ourselves. We'll do this by trying
 			 * to increment w_local_GP.put as long as someone else
 			 * doesn't beat us to it. If they do, we'll have to
 			 * try again.
-		 	 */
-			if (cmpxchg(&ch->w_local_GP.put, put, put + 1) ==
-									put) {
+			 */
+			if (cmpxchg(&ch->w_local_GP.put, put, put + 1) == put) {
 				/* we got the entry referenced by put */
 				break;
 			}
 			continue;	/* try again */
 		}
 
-
 		/*
 		 * There aren't any available msg entries at this time.
 		 *
@@ -1783,9 +1683,8 @@
 		 * that will cause the IPI handler to fetch the latest
 		 * GP values as if an IPI was sent by the other side.
 		 */
-		if (ret == xpcTimeout) {
+		if (ret == xpcTimeout)
 			xpc_IPI_send_local_msgrequest(ch);
-		}
 
 		if (flags & XPC_NOWAIT) {
 			xpc_msgqueue_deref(ch);
@@ -1799,25 +1698,22 @@
 		}
 	}
 
-
 	/* get the message's address and initialize it */
-	msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
-				(put % ch->local_nentries) * ch->msg_size);
-
+	msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+				 (put % ch->local_nentries) * ch->msg_size);
 
 	DBUG_ON(msg->flags != 0);
 	msg->number = put;
 
 	dev_dbg(xpc_chan, "w_local_GP.put changed to %ld; msg=0x%p, "
 		"msg_number=%ld, partid=%d, channel=%d\n", put + 1,
-		(void *) msg, msg->number, ch->partid, ch->number);
+		(void *)msg, msg->number, ch->partid, ch->number);
 
 	*address_of_msg = msg;
 
 	return xpcSuccess;
 }
 
-
 /*
  * Allocate an entry for a message from the message queue associated with the
  * specified channel. NOTE that this routine can sleep waiting for a message
@@ -1838,7 +1734,6 @@
 	enum xpc_retval ret = xpcUnknownReason;
 	struct xpc_msg *msg = NULL;
 
-
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
 	DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
 
@@ -1848,15 +1743,13 @@
 		ret = xpc_allocate_msg(&part->channels[ch_number], flags, &msg);
 		xpc_part_deref(part);
 
-		if (msg != NULL) {
+		if (msg != NULL)
 			*payload = &msg->payload;
-		}
 	}
 
 	return ret;
 }
 
-
 /*
  * Now we actually send the messages that are ready to be sent by advancing
  * the local message queue's Put value and then send an IPI to the recipient
@@ -1869,20 +1762,18 @@
 	s64 put = initial_put + 1;
 	int send_IPI = 0;
 
-
 	while (1) {
 
 		while (1) {
-			if (put == (volatile s64) ch->w_local_GP.put) {
+			if (put == ch->w_local_GP.put)
 				break;
-			}
 
-			msg = (struct xpc_msg *) ((u64) ch->local_msgqueue +
-			       (put % ch->local_nentries) * ch->msg_size);
+			msg = (struct xpc_msg *)((u64)ch->local_msgqueue +
+						 (put % ch->local_nentries) *
+						 ch->msg_size);
 
-			if (!(msg->flags & XPC_M_READY)) {
+			if (!(msg->flags & XPC_M_READY))
 				break;
-			}
 
 			put++;
 		}
@@ -1893,9 +1784,9 @@
 		}
 
 		if (cmpxchg_rel(&ch->local_GP->put, initial_put, put) !=
-								initial_put) {
+		    initial_put) {
 			/* someone else beat us to it */
-			DBUG_ON((volatile s64) ch->local_GP->put < initial_put);
+			DBUG_ON(ch->local_GP->put < initial_put);
 			break;
 		}
 
@@ -1914,12 +1805,10 @@
 		initial_put = put;
 	}
 
-	if (send_IPI) {
+	if (send_IPI)
 		xpc_IPI_send_msgrequest(ch);
-	}
 }
 
-
 /*
  * Common code that does the actual sending of the message by advancing the
  * local message queue's Put value and sends an IPI to the partition the
@@ -1927,16 +1816,15 @@
  */
 static enum xpc_retval
 xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
-			xpc_notify_func func, void *key)
+	     xpc_notify_func func, void *key)
 {
 	enum xpc_retval ret = xpcSuccess;
 	struct xpc_notify *notify = notify;
 	s64 put, msg_number = msg->number;
 
-
 	DBUG_ON(notify_type == XPC_N_CALL && func == NULL);
-	DBUG_ON((((u64) msg - (u64) ch->local_msgqueue) / ch->msg_size) !=
-					msg_number % ch->local_nentries);
+	DBUG_ON((((u64)msg - (u64)ch->local_msgqueue) / ch->msg_size) !=
+		msg_number % ch->local_nentries);
 	DBUG_ON(msg->flags & XPC_M_READY);
 
 	if (ch->flags & XPC_C_DISCONNECTING) {
@@ -1959,7 +1847,7 @@
 		notify->key = key;
 		notify->type = notify_type;
 
-		// >>> is a mb() needed here?
+		/* >>> is a mb() needed here? */
 
 		if (ch->flags & XPC_C_DISCONNECTING) {
 			/*
@@ -1970,7 +1858,7 @@
 			 * the notify entry.
 			 */
 			if (cmpxchg(&notify->type, notify_type, 0) ==
-								notify_type) {
+			    notify_type) {
 				atomic_dec(&ch->n_to_notify);
 				ret = ch->reason;
 			}
@@ -1992,16 +1880,14 @@
 	/* see if the message is next in line to be sent, if so send it */
 
 	put = ch->local_GP->put;
-	if (put == msg_number) {
+	if (put == msg_number)
 		xpc_send_msgs(ch, put);
-	}
 
 	/* drop the reference grabbed in xpc_allocate_msg() */
 	xpc_msgqueue_deref(ch);
 	return ret;
 }
 
-
 /*
  * Send a message previously allocated using xpc_initiate_allocate() on the
  * specified channel connected to the specified partition.
@@ -2029,8 +1915,7 @@
 	struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
 	enum xpc_retval ret;
 
-
-	dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
+	dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
 		partid, ch_number);
 
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
@@ -2042,7 +1927,6 @@
 	return ret;
 }
 
-
 /*
  * Send a message previously allocated using xpc_initiate_allocate on the
  * specified channel connected to the specified partition.
@@ -2075,14 +1959,13 @@
  */
 enum xpc_retval
 xpc_initiate_send_notify(partid_t partid, int ch_number, void *payload,
-				xpc_notify_func func, void *key)
+			 xpc_notify_func func, void *key)
 {
 	struct xpc_partition *part = &xpc_partitions[partid];
 	struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
 	enum xpc_retval ret;
 
-
-	dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *) msg,
+	dev_dbg(xpc_chan, "msg=0x%p, partid=%d, channel=%d\n", (void *)msg,
 		partid, ch_number);
 
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
@@ -2091,11 +1974,10 @@
 	DBUG_ON(func == NULL);
 
 	ret = xpc_send_msg(&part->channels[ch_number], msg, XPC_N_CALL,
-								func, key);
+			   func, key);
 	return ret;
 }
 
-
 static struct xpc_msg *
 xpc_pull_remote_msg(struct xpc_channel *ch, s64 get)
 {
@@ -2105,7 +1987,6 @@
 	u64 msg_offset;
 	enum xpc_retval ret;
 
-
 	if (mutex_lock_interruptible(&ch->msg_to_pull_mutex) != 0) {
 		/* we were interrupted by a signal */
 		return NULL;
@@ -2117,23 +1998,21 @@
 
 		msg_index = ch->next_msg_to_pull % ch->remote_nentries;
 
-		DBUG_ON(ch->next_msg_to_pull >=
-					(volatile s64) ch->w_remote_GP.put);
-		nmsgs =  (volatile s64) ch->w_remote_GP.put -
-						ch->next_msg_to_pull;
+		DBUG_ON(ch->next_msg_to_pull >= ch->w_remote_GP.put);
+		nmsgs = ch->w_remote_GP.put - ch->next_msg_to_pull;
 		if (msg_index + nmsgs > ch->remote_nentries) {
 			/* ignore the ones that wrap the msg queue for now */
 			nmsgs = ch->remote_nentries - msg_index;
 		}
 
 		msg_offset = msg_index * ch->msg_size;
-		msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
-								msg_offset);
-		remote_msg = (struct xpc_msg *) (ch->remote_msgqueue_pa +
-								msg_offset);
+		msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
+		remote_msg = (struct xpc_msg *)(ch->remote_msgqueue_pa +
+						msg_offset);
 
-		if ((ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
-				nmsgs * ch->msg_size)) != xpcSuccess) {
+		ret = xpc_pull_remote_cachelines(part, msg, remote_msg,
+						 nmsgs * ch->msg_size);
+		if (ret != xpcSuccess) {
 
 			dev_dbg(xpc_chan, "failed to pull %d msgs starting with"
 				" msg %ld from partition %d, channel=%d, "
@@ -2146,8 +2025,6 @@
 			return NULL;
 		}
 
-		mb();	/* >>> this may not be needed, we're not sure */
-
 		ch->next_msg_to_pull += nmsgs;
 	}
 
@@ -2155,12 +2032,11 @@
 
 	/* return the message we were looking for */
 	msg_offset = (get % ch->remote_nentries) * ch->msg_size;
-	msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue + msg_offset);
+	msg = (struct xpc_msg *)((u64)ch->remote_msgqueue + msg_offset);
 
 	return msg;
 }
 
-
 /*
  * Get a message to be delivered.
  */
@@ -2170,23 +2046,21 @@
 	struct xpc_msg *msg = NULL;
 	s64 get;
 
-
 	do {
-		if ((volatile u32) ch->flags & XPC_C_DISCONNECTING) {
+		if (ch->flags & XPC_C_DISCONNECTING)
 			break;
-		}
 
-		get = (volatile s64) ch->w_local_GP.get;
-		if (get == (volatile s64) ch->w_remote_GP.put) {
+		get = ch->w_local_GP.get;
+		rmb();	/* guarantee that .get loads before .put */
+		if (get == ch->w_remote_GP.put)
 			break;
-		}
 
 		/* There are messages waiting to be pulled and delivered.
 		 * We need to try to secure one for ourselves. We'll do this
 		 * by trying to increment w_local_GP.get and hope that no one
 		 * else beats us to it. If they do, we'll we'll simply have
 		 * to try again for the next one.
-	 	 */
+		 */
 
 		if (cmpxchg(&ch->w_local_GP.get, get, get + 1) == get) {
 			/* we got the entry referenced by get */
@@ -2211,7 +2085,6 @@
 	return msg;
 }
 
-
 /*
  * Deliver a message to its intended recipient.
  */
@@ -2220,8 +2093,8 @@
 {
 	struct xpc_msg *msg;
 
-
-	if ((msg = xpc_get_deliverable_msg(ch)) != NULL) {
+	msg = xpc_get_deliverable_msg(ch);
+	if (msg != NULL) {
 
 		/*
 		 * This ref is taken to protect the payload itself from being
@@ -2235,16 +2108,16 @@
 		if (ch->func != NULL) {
 			dev_dbg(xpc_chan, "ch->func() called, msg=0x%p, "
 				"msg_number=%ld, partid=%d, channel=%d\n",
-				(void *) msg, msg->number, ch->partid,
+				(void *)msg, msg->number, ch->partid,
 				ch->number);
 
 			/* deliver the message to its intended recipient */
 			ch->func(xpcMsgReceived, ch->partid, ch->number,
-					&msg->payload, ch->key);
+				 &msg->payload, ch->key);
 
 			dev_dbg(xpc_chan, "ch->func() returned, msg=0x%p, "
 				"msg_number=%ld, partid=%d, channel=%d\n",
-				(void *) msg, msg->number, ch->partid,
+				(void *)msg, msg->number, ch->partid,
 				ch->number);
 		}
 
@@ -2252,7 +2125,6 @@
 	}
 }
 
-
 /*
  * Now we actually acknowledge the messages that have been delivered and ack'd
  * by advancing the cached remote message queue's Get value and if requested
@@ -2265,20 +2137,18 @@
 	s64 get = initial_get + 1;
 	int send_IPI = 0;
 
-
 	while (1) {
 
 		while (1) {
-			if (get == (volatile s64) ch->w_local_GP.get) {
+			if (get == ch->w_local_GP.get)
 				break;
-			}
 
-			msg = (struct xpc_msg *) ((u64) ch->remote_msgqueue +
-			       (get % ch->remote_nentries) * ch->msg_size);
+			msg = (struct xpc_msg *)((u64)ch->remote_msgqueue +
+						 (get % ch->remote_nentries) *
+						 ch->msg_size);
 
-			if (!(msg->flags & XPC_M_DONE)) {
+			if (!(msg->flags & XPC_M_DONE))
 				break;
-			}
 
 			msg_flags |= msg->flags;
 			get++;
@@ -2290,10 +2160,9 @@
 		}
 
 		if (cmpxchg_rel(&ch->local_GP->get, initial_get, get) !=
-								initial_get) {
+		    initial_get) {
 			/* someone else beat us to it */
-			DBUG_ON((volatile s64) ch->local_GP->get <=
-								initial_get);
+			DBUG_ON(ch->local_GP->get <= initial_get);
 			break;
 		}
 
@@ -2312,12 +2181,10 @@
 		initial_get = get;
 	}
 
-	if (send_IPI) {
+	if (send_IPI)
 		xpc_IPI_send_msgrequest(ch);
-	}
 }
 
-
 /*
  * Acknowledge receipt of a delivered message.
  *
@@ -2343,17 +2210,16 @@
 	struct xpc_msg *msg = XPC_MSG_ADDRESS(payload);
 	s64 get, msg_number = msg->number;
 
-
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
 	DBUG_ON(ch_number < 0 || ch_number >= part->nchannels);
 
 	ch = &part->channels[ch_number];
 
 	dev_dbg(xpc_chan, "msg=0x%p, msg_number=%ld, partid=%d, channel=%d\n",
-		(void *) msg, msg_number, ch->partid, ch->number);
+		(void *)msg, msg_number, ch->partid, ch->number);
 
-	DBUG_ON((((u64) msg - (u64) ch->remote_msgqueue) / ch->msg_size) !=
-					msg_number % ch->remote_nentries);
+	DBUG_ON((((u64)msg - (u64)ch->remote_msgqueue) / ch->msg_size) !=
+		msg_number % ch->remote_nentries);
 	DBUG_ON(msg->flags & XPC_M_DONE);
 
 	msg->flags |= XPC_M_DONE;
@@ -2369,11 +2235,9 @@
 	 * been delivered.
 	 */
 	get = ch->local_GP->get;
-	if (get == msg_number) {
+	if (get == msg_number)
 		xpc_acknowledge_msgs(ch, get, msg->flags);
-	}
 
 	/* the call to xpc_msgqueue_ref() was done by xpc_deliver_msg()  */
 	xpc_msgqueue_deref(ch);
 }
-
diff --git a/arch/ia64/sn/kernel/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
similarity index 81%
rename from arch/ia64/sn/kernel/xpc_main.c
rename to drivers/misc/sgi-xp/xpc_main.c
index 9e0b164..f673ba9 100644
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -3,10 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2007 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
-
 /*
  * Cross Partition Communication (XPC) support - standard version.
  *
@@ -44,23 +43,20 @@
  *
  */
 
-
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/syscalls.h>
 #include <linux/cache.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include <linux/reboot.h>
 #include <linux/completion.h>
 #include <linux/kdebug.h>
+#include <linux/kthread.h>
+#include <linux/uaccess.h>
 #include <asm/sn/intr.h>
 #include <asm/sn/sn_sal.h>
-#include <asm/uaccess.h>
-#include <asm/sn/xpc.h>
-
+#include "xpc.h"
 
 /* define two XPC debug device structures to be used with dev_dbg() et al */
 
@@ -81,10 +77,8 @@
 struct device *xpc_part = &xpc_part_dbg_subname;
 struct device *xpc_chan = &xpc_chan_dbg_subname;
 
-
 static int xpc_kdebug_ignore;
 
-
 /* systune related variables for /proc/sys directories */
 
 static int xpc_hb_interval = XPC_HB_DEFAULT_INTERVAL;
@@ -96,61 +90,56 @@
 static int xpc_hb_check_max_interval = 120;
 
 int xpc_disengage_request_timelimit = XPC_DISENGAGE_REQUEST_DEFAULT_TIMELIMIT;
-static int xpc_disengage_request_min_timelimit = 0;
+static int xpc_disengage_request_min_timelimit;	/* = 0 */
 static int xpc_disengage_request_max_timelimit = 120;
 
 static ctl_table xpc_sys_xpc_hb_dir[] = {
 	{
-		.ctl_name 	= CTL_UNNUMBERED,
-		.procname	= "hb_interval",
-		.data		= &xpc_hb_interval,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &xpc_hb_min_interval,
-		.extra2		= &xpc_hb_max_interval
-	},
+	 .ctl_name = CTL_UNNUMBERED,
+	 .procname = "hb_interval",
+	 .data = &xpc_hb_interval,
+	 .maxlen = sizeof(int),
+	 .mode = 0644,
+	 .proc_handler = &proc_dointvec_minmax,
+	 .strategy = &sysctl_intvec,
+	 .extra1 = &xpc_hb_min_interval,
+	 .extra2 = &xpc_hb_max_interval},
 	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "hb_check_interval",
-		.data		= &xpc_hb_check_interval,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &xpc_hb_check_min_interval,
-		.extra2		= &xpc_hb_check_max_interval
-	},
+	 .ctl_name = CTL_UNNUMBERED,
+	 .procname = "hb_check_interval",
+	 .data = &xpc_hb_check_interval,
+	 .maxlen = sizeof(int),
+	 .mode = 0644,
+	 .proc_handler = &proc_dointvec_minmax,
+	 .strategy = &sysctl_intvec,
+	 .extra1 = &xpc_hb_check_min_interval,
+	 .extra2 = &xpc_hb_check_max_interval},
 	{}
 };
 static ctl_table xpc_sys_xpc_dir[] = {
 	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "hb",
-		.mode		= 0555,
-		.child		= xpc_sys_xpc_hb_dir
-	},
+	 .ctl_name = CTL_UNNUMBERED,
+	 .procname = "hb",
+	 .mode = 0555,
+	 .child = xpc_sys_xpc_hb_dir},
 	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "disengage_request_timelimit",
-		.data		= &xpc_disengage_request_timelimit,
-		.maxlen		= sizeof(int),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec_minmax,
-		.strategy	= &sysctl_intvec,
-		.extra1		= &xpc_disengage_request_min_timelimit,
-		.extra2		= &xpc_disengage_request_max_timelimit
-	},
+	 .ctl_name = CTL_UNNUMBERED,
+	 .procname = "disengage_request_timelimit",
+	 .data = &xpc_disengage_request_timelimit,
+	 .maxlen = sizeof(int),
+	 .mode = 0644,
+	 .proc_handler = &proc_dointvec_minmax,
+	 .strategy = &sysctl_intvec,
+	 .extra1 = &xpc_disengage_request_min_timelimit,
+	 .extra2 = &xpc_disengage_request_max_timelimit},
 	{}
 };
 static ctl_table xpc_sys_dir[] = {
 	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "xpc",
-		.mode		= 0555,
-		.child		= xpc_sys_xpc_dir
-	},
+	 .ctl_name = CTL_UNNUMBERED,
+	 .procname = "xpc",
+	 .mode = 0555,
+	 .child = xpc_sys_xpc_dir},
 	{}
 };
 static struct ctl_table_header *xpc_sysctl;
@@ -172,13 +161,10 @@
 /* notification that the xpc_discovery thread has exited */
 static DECLARE_COMPLETION(xpc_discovery_exited);
 
-
 static struct timer_list xpc_hb_timer;
 
-
 static void xpc_kthread_waitmsgs(struct xpc_partition *, struct xpc_channel *);
 
-
 static int xpc_system_reboot(struct notifier_block *, unsigned long, void *);
 static struct notifier_block xpc_reboot_notifier = {
 	.notifier_call = xpc_system_reboot,
@@ -189,25 +175,22 @@
 	.notifier_call = xpc_system_die,
 };
 
-
 /*
  * Timer function to enforce the timelimit on the partition disengage request.
  */
 static void
 xpc_timeout_partition_disengage_request(unsigned long data)
 {
-	struct xpc_partition *part = (struct xpc_partition *) data;
-
+	struct xpc_partition *part = (struct xpc_partition *)data;
 
 	DBUG_ON(time_before(jiffies, part->disengage_request_timeout));
 
-	(void) xpc_partition_disengaged(part);
+	(void)xpc_partition_disengaged(part);
 
 	DBUG_ON(part->disengage_request_timeout != 0);
 	DBUG_ON(xpc_partition_engaged(1UL << XPC_PARTID(part)) != 0);
 }
 
-
 /*
  * Notify the heartbeat check thread that an IRQ has been received.
  */
@@ -219,7 +202,6 @@
 	return IRQ_HANDLED;
 }
 
-
 /*
  * Timer to produce the heartbeat.  The timer structures function is
  * already set when this is initially called.  A tunable is used to
@@ -230,15 +212,13 @@
 {
 	xpc_vars->heartbeat++;
 
-	if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
+	if (time_after_eq(jiffies, xpc_hb_check_timeout))
 		wake_up_interruptible(&xpc_act_IRQ_wq);
-	}
 
 	xpc_hb_timer.expires = jiffies + (xpc_hb_interval * HZ);
 	add_timer(&xpc_hb_timer);
 }
 
-
 /*
  * This thread is responsible for nearly all of the partition
  * activation/deactivation.
@@ -248,27 +228,23 @@
 {
 	int last_IRQ_count = 0;
 	int new_IRQ_count;
-	int force_IRQ=0;
-
+	int force_IRQ = 0;
 
 	/* this thread was marked active by xpc_hb_init() */
 
-	daemonize(XPC_HB_CHECK_THREAD_NAME);
-
 	set_cpus_allowed(current, cpumask_of_cpu(XPC_HB_CHECK_CPU));
 
 	/* set our heartbeating to other partitions into motion */
 	xpc_hb_check_timeout = jiffies + (xpc_hb_check_interval * HZ);
 	xpc_hb_beater(0);
 
-	while (!(volatile int) xpc_exiting) {
+	while (!xpc_exiting) {
 
 		dev_dbg(xpc_part, "woke up with %d ticks rem; %d IRQs have "
 			"been received\n",
-			(int) (xpc_hb_check_timeout - jiffies),
+			(int)(xpc_hb_check_timeout - jiffies),
 			atomic_read(&xpc_act_IRQ_rcvd) - last_IRQ_count);
 
-
 		/* checking of remote heartbeats is skewed by IRQ handling */
 		if (time_after_eq(jiffies, xpc_hb_check_timeout)) {
 			dev_dbg(xpc_part, "checking remote heartbeats\n");
@@ -282,7 +258,6 @@
 			force_IRQ = 1;
 		}
 
-
 		/* check for outstanding IRQs */
 		new_IRQ_count = atomic_read(&xpc_act_IRQ_rcvd);
 		if (last_IRQ_count < new_IRQ_count || force_IRQ != 0) {
@@ -294,30 +269,30 @@
 			last_IRQ_count += xpc_identify_act_IRQ_sender();
 			if (last_IRQ_count < new_IRQ_count) {
 				/* retry once to help avoid missing AMO */
-				(void) xpc_identify_act_IRQ_sender();
+				(void)xpc_identify_act_IRQ_sender();
 			}
 			last_IRQ_count = new_IRQ_count;
 
 			xpc_hb_check_timeout = jiffies +
-					   (xpc_hb_check_interval * HZ);
+			    (xpc_hb_check_interval * HZ);
 		}
 
 		/* wait for IRQ or timeout */
-		(void) wait_event_interruptible(xpc_act_IRQ_wq,
-			    (last_IRQ_count < atomic_read(&xpc_act_IRQ_rcvd) ||
-					time_after_eq(jiffies, xpc_hb_check_timeout) ||
-						(volatile int) xpc_exiting));
+		(void)wait_event_interruptible(xpc_act_IRQ_wq,
+					       (last_IRQ_count <
+						atomic_read(&xpc_act_IRQ_rcvd)
+						|| time_after_eq(jiffies,
+							xpc_hb_check_timeout) ||
+						xpc_exiting));
 	}
 
 	dev_dbg(xpc_part, "heartbeat checker is exiting\n");
 
-
 	/* mark this thread as having exited */
 	complete(&xpc_hb_checker_exited);
 	return 0;
 }
 
-
 /*
  * This thread will attempt to discover other partitions to activate
  * based on info provided by SAL. This new thread is short lived and
@@ -326,8 +301,6 @@
 static int
 xpc_initiate_discovery(void *ignore)
 {
-	daemonize(XPC_DISCOVERY_THREAD_NAME);
-
 	xpc_discovery();
 
 	dev_dbg(xpc_part, "discovery thread is exiting\n");
@@ -337,7 +310,6 @@
 	return 0;
 }
 
-
 /*
  * Establish first contact with the remote partititon. This involves pulling
  * the XPC per partition variables from the remote partition and waiting for
@@ -348,7 +320,6 @@
 {
 	enum xpc_retval ret;
 
-
 	while ((ret = xpc_pull_remote_vars_part(part)) != xpcSuccess) {
 		if (ret != xpcRetry) {
 			XPC_DEACTIVATE_PARTITION(part, ret);
@@ -359,17 +330,15 @@
 			"partition %d\n", XPC_PARTID(part));
 
 		/* wait a 1/4 of a second or so */
-		(void) msleep_interruptible(250);
+		(void)msleep_interruptible(250);
 
-		if (part->act_state == XPC_P_DEACTIVATING) {
+		if (part->act_state == XPC_P_DEACTIVATING)
 			return part->reason;
-		}
 	}
 
 	return xpc_mark_partition_active(part);
 }
 
-
 /*
  * The first kthread assigned to a newly activated partition is the one
  * created by XPC HB with which it calls xpc_partition_up(). XPC hangs on to
@@ -386,12 +355,11 @@
 xpc_channel_mgr(struct xpc_partition *part)
 {
 	while (part->act_state != XPC_P_DEACTIVATING ||
-			atomic_read(&part->nchannels_active) > 0 ||
-					!xpc_partition_disengaged(part)) {
+	       atomic_read(&part->nchannels_active) > 0 ||
+	       !xpc_partition_disengaged(part)) {
 
 		xpc_process_channel_activity(part);
 
-
 		/*
 		 * Wait until we've been requested to activate kthreads or
 		 * all of the channel's message queues have been torn down or
@@ -406,21 +374,16 @@
 		 * wake him up.
 		 */
 		atomic_dec(&part->channel_mgr_requests);
-		(void) wait_event_interruptible(part->channel_mgr_wq,
+		(void)wait_event_interruptible(part->channel_mgr_wq,
 				(atomic_read(&part->channel_mgr_requests) > 0 ||
-				(volatile u64) part->local_IPI_amo != 0 ||
-				((volatile u8) part->act_state ==
-							XPC_P_DEACTIVATING &&
-				atomic_read(&part->nchannels_active) == 0 &&
-				xpc_partition_disengaged(part))));
+				 part->local_IPI_amo != 0 ||
+				 (part->act_state == XPC_P_DEACTIVATING &&
+				 atomic_read(&part->nchannels_active) == 0 &&
+				 xpc_partition_disengaged(part))));
 		atomic_set(&part->channel_mgr_requests, 1);
-
-		// >>> Does it need to wakeup periodically as well? In case we
-		// >>> miscalculated the #of kthreads to wakeup or create?
 	}
 }
 
-
 /*
  * When XPC HB determines that a partition has come up, it will create a new
  * kthread and that kthread will call this function to attempt to set up the
@@ -443,9 +406,8 @@
 
 	dev_dbg(xpc_chan, "activating partition %d\n", XPC_PARTID(part));
 
-	if (xpc_setup_infrastructure(part) != xpcSuccess) {
+	if (xpc_setup_infrastructure(part) != xpcSuccess)
 		return;
-	}
 
 	/*
 	 * The kthread that XPC HB called us with will become the
@@ -454,27 +416,22 @@
 	 * has been dismantled.
 	 */
 
-	(void) xpc_part_ref(part);	/* this will always succeed */
+	(void)xpc_part_ref(part);	/* this will always succeed */
 
-	if (xpc_make_first_contact(part) == xpcSuccess) {
+	if (xpc_make_first_contact(part) == xpcSuccess)
 		xpc_channel_mgr(part);
-	}
 
 	xpc_part_deref(part);
 
 	xpc_teardown_infrastructure(part);
 }
 
-
 static int
 xpc_activating(void *__partid)
 {
-	partid_t partid = (u64) __partid;
+	partid_t partid = (u64)__partid;
 	struct xpc_partition *part = &xpc_partitions[partid];
 	unsigned long irq_flags;
-	struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
-	int ret;
-
 
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
 
@@ -496,21 +453,6 @@
 
 	dev_dbg(xpc_part, "bringing partition %d up\n", partid);
 
-	daemonize("xpc%02d", partid);
-
-	/*
-	 * This thread needs to run at a realtime priority to prevent a
-	 * significant performance degradation.
-	 */
-	ret = sched_setscheduler(current, SCHED_FIFO, &param);
-	if (ret != 0) {
-		dev_warn(xpc_part, "unable to set pid %d to a realtime "
-			"priority, ret=%d\n", current->pid, ret);
-	}
-
-	/* allow this thread and its children to run on any CPU */
-	set_cpus_allowed(current, CPU_MASK_ALL);
-
 	/*
 	 * Register the remote partition's AMOs with SAL so it can handle
 	 * and cleanup errors within that address range should the remote
@@ -522,9 +464,9 @@
 	 * reloads and system reboots.
 	 */
 	if (sn_register_xp_addr_region(part->remote_amos_page_pa,
-							PAGE_SIZE, 1) < 0) {
+				       PAGE_SIZE, 1) < 0) {
 		dev_warn(xpc_part, "xpc_partition_up(%d) failed to register "
-			"xp_addr region\n", partid);
+			 "xp_addr region\n", partid);
 
 		spin_lock_irqsave(&part->act_lock, irq_flags);
 		part->act_state = XPC_P_INACTIVE;
@@ -537,12 +479,11 @@
 	xpc_allow_hb(partid, xpc_vars);
 	xpc_IPI_send_activated(part);
 
-
 	/*
 	 * xpc_partition_up() holds this thread and marks this partition as
 	 * XPC_P_ACTIVE by calling xpc_hb_mark_active().
 	 */
-	(void) xpc_partition_up(part);
+	(void)xpc_partition_up(part);
 
 	xpc_disallow_hb(partid, xpc_vars);
 	xpc_mark_partition_inactive(part);
@@ -555,14 +496,12 @@
 	return 0;
 }
 
-
 void
 xpc_activate_partition(struct xpc_partition *part)
 {
 	partid_t partid = XPC_PARTID(part);
 	unsigned long irq_flags;
-	pid_t pid;
-
+	struct task_struct *kthread;
 
 	spin_lock_irqsave(&part->act_lock, irq_flags);
 
@@ -573,9 +512,9 @@
 
 	spin_unlock_irqrestore(&part->act_lock, irq_flags);
 
-	pid = kernel_thread(xpc_activating, (void *) ((u64) partid), 0);
-
-	if (unlikely(pid <= 0)) {
+	kthread = kthread_run(xpc_activating, (void *)((u64)partid), "xpc%02d",
+			      partid);
+	if (IS_ERR(kthread)) {
 		spin_lock_irqsave(&part->act_lock, irq_flags);
 		part->act_state = XPC_P_INACTIVE;
 		XPC_SET_REASON(part, xpcCloneKThreadFailed, __LINE__);
@@ -583,12 +522,11 @@
 	}
 }
 
-
 /*
  * Handle the receipt of a SGI_XPC_NOTIFY IRQ by seeing whether the specified
  * partition actually sent it. Since SGI_XPC_NOTIFY IRQs may be shared by more
  * than one partition, we use an AMO_t structure per partition to indicate
- * whether a partition has sent an IPI or not.  >>> If it has, then wake up the
+ * whether a partition has sent an IPI or not.  If it has, then wake up the
  * associated kthread to handle it.
  *
  * All SGI_XPC_NOTIFY IRQs received by XPC are the result of IPIs sent by XPC
@@ -603,10 +541,9 @@
 irqreturn_t
 xpc_notify_IRQ_handler(int irq, void *dev_id)
 {
-	partid_t partid = (partid_t) (u64) dev_id;
+	partid_t partid = (partid_t) (u64)dev_id;
 	struct xpc_partition *part = &xpc_partitions[partid];
 
-
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
 
 	if (xpc_part_ref(part)) {
@@ -617,7 +554,6 @@
 	return IRQ_HANDLED;
 }
 
-
 /*
  * Check to see if xpc_notify_IRQ_handler() dropped any IPIs on the floor
  * because the write to their associated IPI amo completed after the IRQ/IPI
@@ -630,13 +566,12 @@
 		xpc_check_for_channel_activity(part);
 
 		part->dropped_IPI_timer.expires = jiffies +
-							XPC_P_DROPPED_IPI_WAIT;
+		    XPC_P_DROPPED_IPI_WAIT;
 		add_timer(&part->dropped_IPI_timer);
 		xpc_part_deref(part);
 	}
 }
 
-
 void
 xpc_activate_kthreads(struct xpc_channel *ch, int needed)
 {
@@ -644,7 +579,6 @@
 	int assigned = atomic_read(&ch->kthreads_assigned);
 	int wakeup;
 
-
 	DBUG_ON(needed <= 0);
 
 	if (idle > 0) {
@@ -658,16 +592,13 @@
 		wake_up_nr(&ch->idle_wq, wakeup);
 	}
 
-	if (needed <= 0) {
+	if (needed <= 0)
 		return;
-	}
 
 	if (needed + assigned > ch->kthreads_assigned_limit) {
 		needed = ch->kthreads_assigned_limit - assigned;
-		// >>>should never be less than 0
-		if (needed <= 0) {
+		if (needed <= 0)
 			return;
-		}
 	}
 
 	dev_dbg(xpc_chan, "create %d new kthreads, partid=%d, channel=%d\n",
@@ -676,7 +607,6 @@
 	xpc_create_kthreads(ch, needed, 0);
 }
 
-
 /*
  * This function is where XPC's kthreads wait for messages to deliver.
  */
@@ -686,15 +616,13 @@
 	do {
 		/* deliver messages to their intended recipients */
 
-		while ((volatile s64) ch->w_local_GP.get <
-				(volatile s64) ch->w_remote_GP.put &&
-					!((volatile u32) ch->flags &
-						XPC_C_DISCONNECTING)) {
+		while (ch->w_local_GP.get < ch->w_remote_GP.put &&
+		       !(ch->flags & XPC_C_DISCONNECTING)) {
 			xpc_deliver_msg(ch);
 		}
 
 		if (atomic_inc_return(&ch->kthreads_idle) >
-						ch->kthreads_idle_limit) {
+		    ch->kthreads_idle_limit) {
 			/* too many idle kthreads on this channel */
 			atomic_dec(&ch->kthreads_idle);
 			break;
@@ -703,20 +631,17 @@
 		dev_dbg(xpc_chan, "idle kthread calling "
 			"wait_event_interruptible_exclusive()\n");
 
-		(void) wait_event_interruptible_exclusive(ch->idle_wq,
-				((volatile s64) ch->w_local_GP.get <
-					(volatile s64) ch->w_remote_GP.put ||
-				((volatile u32) ch->flags &
-						XPC_C_DISCONNECTING)));
+		(void)wait_event_interruptible_exclusive(ch->idle_wq,
+				(ch->w_local_GP.get < ch->w_remote_GP.put ||
+				 (ch->flags & XPC_C_DISCONNECTING)));
 
 		atomic_dec(&ch->kthreads_idle);
 
-	} while (!((volatile u32) ch->flags & XPC_C_DISCONNECTING));
+	} while (!(ch->flags & XPC_C_DISCONNECTING));
 }
 
-
 static int
-xpc_daemonize_kthread(void *args)
+xpc_kthread_start(void *args)
 {
 	partid_t partid = XPC_UNPACK_ARG1(args);
 	u16 ch_number = XPC_UNPACK_ARG2(args);
@@ -725,9 +650,6 @@
 	int n_needed;
 	unsigned long irq_flags;
 
-
-	daemonize("xpc%02dc%d", partid, ch_number);
-
 	dev_dbg(xpc_chan, "kthread starting, partid=%d, channel=%d\n",
 		partid, ch_number);
 
@@ -756,10 +678,9 @@
 			 * need one less than total #of messages to deliver.
 			 */
 			n_needed = ch->w_remote_GP.put - ch->w_local_GP.get - 1;
-			if (n_needed > 0 &&
-					!(ch->flags & XPC_C_DISCONNECTING)) {
+			if (n_needed > 0 && !(ch->flags & XPC_C_DISCONNECTING))
 				xpc_activate_kthreads(ch, n_needed);
-			}
+
 		} else {
 			spin_unlock_irqrestore(&ch->lock, irq_flags);
 		}
@@ -771,7 +692,7 @@
 
 	spin_lock_irqsave(&ch->lock, irq_flags);
 	if ((ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) &&
-			!(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
+	    !(ch->flags & XPC_C_DISCONNECTINGCALLOUT)) {
 		ch->flags |= XPC_C_DISCONNECTINGCALLOUT;
 		spin_unlock_irqrestore(&ch->lock, irq_flags);
 
@@ -798,7 +719,6 @@
 	return 0;
 }
 
-
 /*
  * For each partition that XPC has established communications with, there is
  * a minimum of one kernel thread assigned to perform any operation that
@@ -813,13 +733,12 @@
  */
 void
 xpc_create_kthreads(struct xpc_channel *ch, int needed,
-			int ignore_disconnecting)
+		    int ignore_disconnecting)
 {
 	unsigned long irq_flags;
-	pid_t pid;
 	u64 args = XPC_PACK_ARGS(ch->partid, ch->number);
 	struct xpc_partition *part = &xpc_partitions[ch->partid];
-
+	struct task_struct *kthread;
 
 	while (needed-- > 0) {
 
@@ -832,7 +751,7 @@
 			if (!atomic_inc_not_zero(&ch->kthreads_assigned)) {
 				/* kthreads assigned had gone to zero */
 				BUG_ON(!(ch->flags &
-					XPC_C_DISCONNECTINGCALLOUT_MADE));
+					 XPC_C_DISCONNECTINGCALLOUT_MADE));
 				break;
 			}
 
@@ -843,11 +762,12 @@
 			if (atomic_inc_return(&part->nchannels_engaged) == 1)
 				xpc_mark_partition_engaged(part);
 		}
-		(void) xpc_part_ref(part);
+		(void)xpc_part_ref(part);
 		xpc_msgqueue_ref(ch);
 
-		pid = kernel_thread(xpc_daemonize_kthread, (void *) args, 0);
-		if (pid < 0) {
+		kthread = kthread_run(xpc_kthread_start, (void *)args,
+				      "xpc%02dc%d", ch->partid, ch->number);
+		if (IS_ERR(kthread)) {
 			/* the fork failed */
 
 			/*
@@ -857,7 +777,7 @@
 			 * to this channel are blocked in the channel's
 			 * registerer, because the only thing that will unblock
 			 * them is the xpcDisconnecting callout that this
-			 * failed kernel_thread would have made.
+			 * failed kthread_run() would have made.
 			 */
 
 			if (atomic_dec_return(&ch->kthreads_assigned) == 0 &&
@@ -869,7 +789,7 @@
 			xpc_part_deref(part);
 
 			if (atomic_read(&ch->kthreads_assigned) <
-						ch->kthreads_idle_limit) {
+			    ch->kthreads_idle_limit) {
 				/*
 				 * Flag this as an error only if we have an
 				 * insufficient #of kthreads for the channel
@@ -877,17 +797,14 @@
 				 */
 				spin_lock_irqsave(&ch->lock, irq_flags);
 				XPC_DISCONNECT_CHANNEL(ch, xpcLackOfResources,
-								&irq_flags);
+						       &irq_flags);
 				spin_unlock_irqrestore(&ch->lock, irq_flags);
 			}
 			break;
 		}
-
-		ch->kthreads_created++;	// >>> temporary debug only!!!
 	}
 }
 
-
 void
 xpc_disconnect_wait(int ch_number)
 {
@@ -897,14 +814,12 @@
 	struct xpc_channel *ch;
 	int wakeup_channel_mgr;
 
-
 	/* now wait for all callouts to the caller's function to cease */
 	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
 		part = &xpc_partitions[partid];
 
-		if (!xpc_part_ref(part)) {
+		if (!xpc_part_ref(part))
 			continue;
-		}
 
 		ch = &part->channels[ch_number];
 
@@ -923,7 +838,8 @@
 			if (part->act_state != XPC_P_DEACTIVATING) {
 				spin_lock(&part->IPI_lock);
 				XPC_SET_IPI_FLAGS(part->local_IPI_amo,
-					ch->number, ch->delayed_IPI_flags);
+						  ch->number,
+						  ch->delayed_IPI_flags);
 				spin_unlock(&part->IPI_lock);
 				wakeup_channel_mgr = 1;
 			}
@@ -933,15 +849,13 @@
 		ch->flags &= ~XPC_C_WDISCONNECT;
 		spin_unlock_irqrestore(&ch->lock, irq_flags);
 
-		if (wakeup_channel_mgr) {
+		if (wakeup_channel_mgr)
 			xpc_wakeup_channel_mgr(part);
-		}
 
 		xpc_part_deref(part);
 	}
 }
 
-
 static void
 xpc_do_exit(enum xpc_retval reason)
 {
@@ -950,7 +864,6 @@
 	struct xpc_partition *part;
 	unsigned long printmsg_time, disengage_request_timeout = 0;
 
-
 	/* a 'rmmod XPC' and a 'reboot' cannot both end up here together */
 	DBUG_ON(xpc_exiting == 1);
 
@@ -971,10 +884,8 @@
 	/* wait for the heartbeat checker thread to exit */
 	wait_for_completion(&xpc_hb_checker_exited);
 
-
 	/* sleep for a 1/3 of a second or so */
-	(void) msleep_interruptible(300);
-
+	(void)msleep_interruptible(300);
 
 	/* wait for all partitions to become inactive */
 
@@ -988,7 +899,7 @@
 			part = &xpc_partitions[partid];
 
 			if (xpc_partition_disengaged(part) &&
-					part->act_state == XPC_P_INACTIVE) {
+			    part->act_state == XPC_P_INACTIVE) {
 				continue;
 			}
 
@@ -997,47 +908,46 @@
 			XPC_DEACTIVATE_PARTITION(part, reason);
 
 			if (part->disengage_request_timeout >
-						disengage_request_timeout) {
+			    disengage_request_timeout) {
 				disengage_request_timeout =
-						part->disengage_request_timeout;
+				    part->disengage_request_timeout;
 			}
 		}
 
 		if (xpc_partition_engaged(-1UL)) {
 			if (time_after(jiffies, printmsg_time)) {
 				dev_info(xpc_part, "waiting for remote "
-					"partitions to disengage, timeout in "
-					"%ld seconds\n",
-					(disengage_request_timeout - jiffies)
-									/ HZ);
+					 "partitions to disengage, timeout in "
+					 "%ld seconds\n",
+					 (disengage_request_timeout - jiffies)
+					 / HZ);
 				printmsg_time = jiffies +
-					(XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
+				    (XPC_DISENGAGE_PRINTMSG_INTERVAL * HZ);
 				printed_waiting_msg = 1;
 			}
 
 		} else if (active_part_count > 0) {
 			if (printed_waiting_msg) {
 				dev_info(xpc_part, "waiting for local partition"
-					" to disengage\n");
+					 " to disengage\n");
 				printed_waiting_msg = 0;
 			}
 
 		} else {
 			if (!xpc_disengage_request_timedout) {
 				dev_info(xpc_part, "all partitions have "
-					"disengaged\n");
+					 "disengaged\n");
 			}
 			break;
 		}
 
 		/* sleep for a 1/3 of a second or so */
-		(void) msleep_interruptible(300);
+		(void)msleep_interruptible(300);
 
 	} while (1);
 
 	DBUG_ON(xpc_partition_engaged(-1UL));
 
-
 	/* indicate to others that our reserved page is uninitialized */
 	xpc_rsvd_page->vars_pa = 0;
 
@@ -1047,27 +957,24 @@
 
 	if (reason == xpcUnloading) {
 		/* take ourselves off of the reboot_notifier_list */
-		(void) unregister_reboot_notifier(&xpc_reboot_notifier);
+		(void)unregister_reboot_notifier(&xpc_reboot_notifier);
 
 		/* take ourselves off of the die_notifier list */
-		(void) unregister_die_notifier(&xpc_die_notifier);
+		(void)unregister_die_notifier(&xpc_die_notifier);
 	}
 
 	/* close down protections for IPI operations */
 	xpc_restrict_IPI_ops();
 
-
 	/* clear the interface to XPC's functions */
 	xpc_clear_interface();
 
-	if (xpc_sysctl) {
+	if (xpc_sysctl)
 		unregister_sysctl_table(xpc_sysctl);
-	}
 
 	kfree(xpc_remote_copy_buffer_base);
 }
 
-
 /*
  * This function is called when the system is being rebooted.
  */
@@ -1076,7 +983,6 @@
 {
 	enum xpc_retval reason;
 
-
 	switch (event) {
 	case SYS_RESTART:
 		reason = xpcSystemReboot;
@@ -1095,7 +1001,6 @@
 	return NOTIFY_DONE;
 }
 
-
 /*
  * Notify other partitions to disengage from all references to our memory.
  */
@@ -1107,17 +1012,16 @@
 	unsigned long engaged;
 	long time, printmsg_time, disengage_request_timeout;
 
-
 	/* keep xpc_hb_checker thread from doing anything (just in case) */
 	xpc_exiting = 1;
 
-	xpc_vars->heartbeating_to_mask = 0;  /* indicate we're deactivated */
+	xpc_vars->heartbeating_to_mask = 0;	/* indicate we're deactivated */
 
 	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
 		part = &xpc_partitions[partid];
 
 		if (!XPC_SUPPORTS_DISENGAGE_REQUEST(part->
-							remote_vars_version)) {
+		    remote_vars_version)) {
 
 			/* just in case it was left set by an earlier XPC */
 			xpc_clear_partition_engaged(1UL << partid);
@@ -1125,7 +1029,7 @@
 		}
 
 		if (xpc_partition_engaged(1UL << partid) ||
-					part->act_state != XPC_P_INACTIVE) {
+		    part->act_state != XPC_P_INACTIVE) {
 			xpc_request_partition_disengage(part);
 			xpc_mark_partition_disengaged(part);
 			xpc_IPI_send_disengage(part);
@@ -1134,9 +1038,9 @@
 
 	time = rtc_time();
 	printmsg_time = time +
-		(XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
+	    (XPC_DISENGAGE_PRINTMSG_INTERVAL * sn_rtc_cycles_per_second);
 	disengage_request_timeout = time +
-		(xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
+	    (xpc_disengage_request_timelimit * sn_rtc_cycles_per_second);
 
 	/* wait for all other partitions to disengage from us */
 
@@ -1152,8 +1056,8 @@
 			for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
 				if (engaged & (1UL << partid)) {
 					dev_info(xpc_part, "disengage from "
-						"remote partition %d timed "
-						"out\n", partid);
+						 "remote partition %d timed "
+						 "out\n", partid);
 				}
 			}
 			break;
@@ -1161,17 +1065,16 @@
 
 		if (time >= printmsg_time) {
 			dev_info(xpc_part, "waiting for remote partitions to "
-				"disengage, timeout in %ld seconds\n",
-				(disengage_request_timeout - time) /
-						sn_rtc_cycles_per_second);
+				 "disengage, timeout in %ld seconds\n",
+				 (disengage_request_timeout - time) /
+				 sn_rtc_cycles_per_second);
 			printmsg_time = time +
-					(XPC_DISENGAGE_PRINTMSG_INTERVAL *
-						sn_rtc_cycles_per_second);
+			    (XPC_DISENGAGE_PRINTMSG_INTERVAL *
+			     sn_rtc_cycles_per_second);
 		}
 	}
 }
 
-
 /*
  * This function is called when the system is being restarted or halted due
  * to some sort of system failure. If this is the case we need to notify the
@@ -1191,9 +1094,9 @@
 
 	case DIE_KDEBUG_ENTER:
 		/* Should lack of heartbeat be ignored by other partitions? */
-		if (!xpc_kdebug_ignore) {
+		if (!xpc_kdebug_ignore)
 			break;
-		}
+
 		/* fall through */
 	case DIE_MCA_MONARCH_ENTER:
 	case DIE_INIT_MONARCH_ENTER:
@@ -1203,9 +1106,9 @@
 
 	case DIE_KDEBUG_LEAVE:
 		/* Is lack of heartbeat being ignored by other partitions? */
-		if (!xpc_kdebug_ignore) {
+		if (!xpc_kdebug_ignore)
 			break;
-		}
+
 		/* fall through */
 	case DIE_MCA_MONARCH_LEAVE:
 	case DIE_INIT_MONARCH_LEAVE:
@@ -1217,26 +1120,23 @@
 	return NOTIFY_DONE;
 }
 
-
 int __init
 xpc_init(void)
 {
 	int ret;
 	partid_t partid;
 	struct xpc_partition *part;
-	pid_t pid;
+	struct task_struct *kthread;
 	size_t buf_size;
 
-
-	if (!ia64_platform_is("sn2")) {
+	if (!ia64_platform_is("sn2"))
 		return -ENODEV;
-	}
-
 
 	buf_size = max(XPC_RP_VARS_SIZE,
-				XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
+		       XPC_RP_HEADER_SIZE + XP_NASID_MASK_BYTES);
 	xpc_remote_copy_buffer = xpc_kmalloc_cacheline_aligned(buf_size,
-				     GFP_KERNEL, &xpc_remote_copy_buffer_base);
+							       GFP_KERNEL,
+						  &xpc_remote_copy_buffer_base);
 	if (xpc_remote_copy_buffer == NULL)
 		return -ENOMEM;
 
@@ -1256,7 +1156,7 @@
 	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
 		part = &xpc_partitions[partid];
 
-		DBUG_ON((u64) part != L1_CACHE_ALIGN((u64) part));
+		DBUG_ON((u64)part != L1_CACHE_ALIGN((u64)part));
 
 		part->act_IRQ_rcvd = 0;
 		spin_lock_init(&part->act_lock);
@@ -1265,8 +1165,8 @@
 
 		init_timer(&part->disengage_request_timer);
 		part->disengage_request_timer.function =
-				xpc_timeout_partition_disengage_request;
-		part->disengage_request_timer.data = (unsigned long) part;
+		    xpc_timeout_partition_disengage_request;
+		part->disengage_request_timer.data = (unsigned long)part;
 
 		part->setup_state = XPC_P_UNSET;
 		init_waitqueue_head(&part->teardown_wq);
@@ -1292,16 +1192,15 @@
 	 * but rather immediately process the interrupt.
 	 */
 	ret = request_irq(SGI_XPC_ACTIVATE, xpc_act_IRQ_handler, 0,
-							"xpc hb", NULL);
+			  "xpc hb", NULL);
 	if (ret != 0) {
 		dev_err(xpc_part, "can't register ACTIVATE IRQ handler, "
 			"errno=%d\n", -ret);
 
 		xpc_restrict_IPI_ops();
 
-		if (xpc_sysctl) {
+		if (xpc_sysctl)
 			unregister_sysctl_table(xpc_sysctl);
-		}
 
 		kfree(xpc_remote_copy_buffer_base);
 		return -EBUSY;
@@ -1319,26 +1218,22 @@
 		free_irq(SGI_XPC_ACTIVATE, NULL);
 		xpc_restrict_IPI_ops();
 
-		if (xpc_sysctl) {
+		if (xpc_sysctl)
 			unregister_sysctl_table(xpc_sysctl);
-		}
 
 		kfree(xpc_remote_copy_buffer_base);
 		return -EBUSY;
 	}
 
-
 	/* add ourselves to the reboot_notifier_list */
 	ret = register_reboot_notifier(&xpc_reboot_notifier);
-	if (ret != 0) {
+	if (ret != 0)
 		dev_warn(xpc_part, "can't register reboot notifier\n");
-	}
 
 	/* add ourselves to the die_notifier list */
 	ret = register_die_notifier(&xpc_die_notifier);
-	if (ret != 0) {
+	if (ret != 0)
 		dev_warn(xpc_part, "can't register die notifier\n");
-	}
 
 	init_timer(&xpc_hb_timer);
 	xpc_hb_timer.function = xpc_hb_beater;
@@ -1347,39 +1242,38 @@
 	 * The real work-horse behind xpc.  This processes incoming
 	 * interrupts and monitors remote heartbeats.
 	 */
-	pid = kernel_thread(xpc_hb_checker, NULL, 0);
-	if (pid < 0) {
+	kthread = kthread_run(xpc_hb_checker, NULL, XPC_HB_CHECK_THREAD_NAME);
+	if (IS_ERR(kthread)) {
 		dev_err(xpc_part, "failed while forking hb check thread\n");
 
 		/* indicate to others that our reserved page is uninitialized */
 		xpc_rsvd_page->vars_pa = 0;
 
 		/* take ourselves off of the reboot_notifier_list */
-		(void) unregister_reboot_notifier(&xpc_reboot_notifier);
+		(void)unregister_reboot_notifier(&xpc_reboot_notifier);
 
 		/* take ourselves off of the die_notifier list */
-		(void) unregister_die_notifier(&xpc_die_notifier);
+		(void)unregister_die_notifier(&xpc_die_notifier);
 
 		del_timer_sync(&xpc_hb_timer);
 		free_irq(SGI_XPC_ACTIVATE, NULL);
 		xpc_restrict_IPI_ops();
 
-		if (xpc_sysctl) {
+		if (xpc_sysctl)
 			unregister_sysctl_table(xpc_sysctl);
-		}
 
 		kfree(xpc_remote_copy_buffer_base);
 		return -EBUSY;
 	}
 
-
 	/*
 	 * Startup a thread that will attempt to discover other partitions to
 	 * activate based on info provided by SAL. This new thread is short
 	 * lived and will exit once discovery is complete.
 	 */
-	pid = kernel_thread(xpc_initiate_discovery, NULL, 0);
-	if (pid < 0) {
+	kthread = kthread_run(xpc_initiate_discovery, NULL,
+			      XPC_DISCOVERY_THREAD_NAME);
+	if (IS_ERR(kthread)) {
 		dev_err(xpc_part, "failed while forking discovery thread\n");
 
 		/* mark this new thread as a non-starter */
@@ -1389,7 +1283,6 @@
 		return -EBUSY;
 	}
 
-
 	/* set the interface to point at XPC's functions */
 	xpc_set_interface(xpc_initiate_connect, xpc_initiate_disconnect,
 			  xpc_initiate_allocate, xpc_initiate_send,
@@ -1398,16 +1291,16 @@
 
 	return 0;
 }
-module_init(xpc_init);
 
+module_init(xpc_init);
 
 void __exit
 xpc_exit(void)
 {
 	xpc_do_exit(xpcUnloading);
 }
-module_exit(xpc_exit);
 
+module_exit(xpc_exit);
 
 MODULE_AUTHOR("Silicon Graphics, Inc.");
 MODULE_DESCRIPTION("Cross Partition Communication (XPC) support");
@@ -1415,17 +1308,16 @@
 
 module_param(xpc_hb_interval, int, 0);
 MODULE_PARM_DESC(xpc_hb_interval, "Number of seconds between "
-		"heartbeat increments.");
+		 "heartbeat increments.");
 
 module_param(xpc_hb_check_interval, int, 0);
 MODULE_PARM_DESC(xpc_hb_check_interval, "Number of seconds between "
-		"heartbeat checks.");
+		 "heartbeat checks.");
 
 module_param(xpc_disengage_request_timelimit, int, 0);
 MODULE_PARM_DESC(xpc_disengage_request_timelimit, "Number of seconds to wait "
-		"for disengage request to complete.");
+		 "for disengage request to complete.");
 
 module_param(xpc_kdebug_ignore, int, 0);
 MODULE_PARM_DESC(xpc_kdebug_ignore, "Should lack of heartbeat be ignored by "
-		"other partitions when dropping into kdebug.");
-
+		 "other partitions when dropping into kdebug.");
diff --git a/arch/ia64/sn/kernel/xpc_partition.c b/drivers/misc/sgi-xp/xpc_partition.c
similarity index 79%
rename from arch/ia64/sn/kernel/xpc_partition.c
rename to drivers/misc/sgi-xp/xpc_partition.c
index 9e97c26..27e200e 100644
--- a/arch/ia64/sn/kernel/xpc_partition.c
+++ b/drivers/misc/sgi-xp/xpc_partition.c
@@ -3,10 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (c) 2004-2006 Silicon Graphics, Inc.  All Rights Reserved.
+ * Copyright (c) 2004-2008 Silicon Graphics, Inc.  All Rights Reserved.
  */
 
-
 /*
  * Cross Partition Communication (XPC) partition support.
  *
@@ -16,7 +15,6 @@
  *
  */
 
-
 #include <linux/kernel.h>
 #include <linux/sysctl.h>
 #include <linux/cache.h>
@@ -28,13 +26,11 @@
 #include <asm/sn/sn_sal.h>
 #include <asm/sn/nodepda.h>
 #include <asm/sn/addrs.h>
-#include <asm/sn/xpc.h>
-
+#include "xpc.h"
 
 /* XPC is exiting flag */
 int xpc_exiting;
 
-
 /* SH_IPI_ACCESS shub register value on startup */
 static u64 xpc_sh1_IPI_access;
 static u64 xpc_sh2_IPI_access0;
@@ -42,11 +38,9 @@
 static u64 xpc_sh2_IPI_access2;
 static u64 xpc_sh2_IPI_access3;
 
-
 /* original protection values for each node */
 u64 xpc_prot_vec[MAX_NUMNODES];
 
-
 /* this partition's reserved page pointers */
 struct xpc_rsvd_page *xpc_rsvd_page;
 static u64 *xpc_part_nasids;
@@ -57,7 +51,6 @@
 static int xp_nasid_mask_bytes;	/* actual size in bytes of nasid mask */
 static int xp_nasid_mask_words;	/* actual size in words of nasid mask */
 
-
 /*
  * For performance reasons, each entry of xpc_partitions[] is cacheline
  * aligned. And xpc_partitions[] is padded with an additional entry at the
@@ -66,7 +59,6 @@
  */
 struct xpc_partition xpc_partitions[XP_MAX_PARTITIONS + 1];
 
-
 /*
  * Generic buffer used to store a local copy of portions of a remote
  * partition's reserved page (either its header and part_nasids mask,
@@ -75,7 +67,6 @@
 char *xpc_remote_copy_buffer;
 void *xpc_remote_copy_buffer_base;
 
-
 /*
  * Guarantee that the kmalloc'd memory is cacheline aligned.
  */
@@ -84,22 +75,21 @@
 {
 	/* see if kmalloc will give us cachline aligned memory by default */
 	*base = kmalloc(size, flags);
-	if (*base == NULL) {
+	if (*base == NULL)
 		return NULL;
-	}
-	if ((u64) *base == L1_CACHE_ALIGN((u64) *base)) {
+
+	if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
 		return *base;
-	}
+
 	kfree(*base);
 
 	/* nope, we'll have to do it ourselves */
 	*base = kmalloc(size + L1_CACHE_BYTES, flags);
-	if (*base == NULL) {
+	if (*base == NULL)
 		return NULL;
-	}
-	return (void *) L1_CACHE_ALIGN((u64) *base);
-}
 
+	return (void *)L1_CACHE_ALIGN((u64)*base);
+}
 
 /*
  * Given a nasid, get the physical address of the  partition's reserved page
@@ -117,25 +107,24 @@
 	u64 buf_len = 0;
 	void *buf_base = NULL;
 
-
 	while (1) {
 
 		status = sn_partition_reserved_page_pa(buf, &cookie, &rp_pa,
-								&len);
+						       &len);
 
 		dev_dbg(xpc_part, "SAL returned with status=%li, cookie="
 			"0x%016lx, address=0x%016lx, len=0x%016lx\n",
 			status, cookie, rp_pa, len);
 
-		if (status != SALRET_MORE_PASSES) {
+		if (status != SALRET_MORE_PASSES)
 			break;
-		}
 
 		if (L1_CACHE_ALIGN(len) > buf_len) {
 			kfree(buf_base);
 			buf_len = L1_CACHE_ALIGN(len);
-			buf = (u64) xpc_kmalloc_cacheline_aligned(buf_len,
-							GFP_KERNEL, &buf_base);
+			buf = (u64)xpc_kmalloc_cacheline_aligned(buf_len,
+								 GFP_KERNEL,
+								 &buf_base);
 			if (buf_base == NULL) {
 				dev_err(xpc_part, "unable to kmalloc "
 					"len=0x%016lx\n", buf_len);
@@ -145,7 +134,7 @@
 		}
 
 		bte_res = xp_bte_copy(rp_pa, buf, buf_len,
-					(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+				      (BTE_NOTIFY | BTE_WACQUIRE), NULL);
 		if (bte_res != BTE_SUCCESS) {
 			dev_dbg(xpc_part, "xp_bte_copy failed %i\n", bte_res);
 			status = SALRET_ERROR;
@@ -155,14 +144,13 @@
 
 	kfree(buf_base);
 
-	if (status != SALRET_OK) {
+	if (status != SALRET_OK)
 		rp_pa = 0;
-	}
+
 	dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
 	return rp_pa;
 }
 
-
 /*
  * Fill the partition reserved page with the information needed by
  * other partitions to discover we are alive and establish initial
@@ -176,7 +164,6 @@
 	u64 rp_pa, nasid_array = 0;
 	int i, ret;
 
-
 	/* get the local reserved page's address */
 
 	preempt_disable();
@@ -186,7 +173,7 @@
 		dev_err(xpc_part, "SAL failed to locate the reserved page\n");
 		return NULL;
 	}
-	rp = (struct xpc_rsvd_page *) __va(rp_pa);
+	rp = (struct xpc_rsvd_page *)__va(rp_pa);
 
 	if (rp->partid != sn_partition_id) {
 		dev_err(xpc_part, "the reserved page's partid of %d should be "
@@ -222,8 +209,9 @@
 	 * on subsequent loads of XPC. This AMO page is never freed, and its
 	 * memory protections are never restricted.
 	 */
-	if ((amos_page = xpc_vars->amos_page) == NULL) {
-		amos_page = (AMO_t *) TO_AMO(uncached_alloc_page(0));
+	amos_page = xpc_vars->amos_page;
+	if (amos_page == NULL) {
+		amos_page = (AMO_t *)TO_AMO(uncached_alloc_page(0));
 		if (amos_page == NULL) {
 			dev_err(xpc_part, "can't allocate page of AMOs\n");
 			return NULL;
@@ -234,30 +222,31 @@
 		 * when xpc_allow_IPI_ops() is called via xpc_hb_init().
 		 */
 		if (!enable_shub_wars_1_1()) {
-			ret = sn_change_memprotect(ia64_tpa((u64) amos_page),
-					PAGE_SIZE, SN_MEMPROT_ACCESS_CLASS_1,
-					&nasid_array);
+			ret = sn_change_memprotect(ia64_tpa((u64)amos_page),
+						   PAGE_SIZE,
+						   SN_MEMPROT_ACCESS_CLASS_1,
+						   &nasid_array);
 			if (ret != 0) {
 				dev_err(xpc_part, "can't change memory "
 					"protections\n");
 				uncached_free_page(__IA64_UNCACHED_OFFSET |
-						   TO_PHYS((u64) amos_page));
+						   TO_PHYS((u64)amos_page));
 				return NULL;
 			}
 		}
-	} else if (!IS_AMO_ADDRESS((u64) amos_page)) {
+	} else if (!IS_AMO_ADDRESS((u64)amos_page)) {
 		/*
 		 * EFI's XPBOOT can also set amos_page in the reserved page,
 		 * but it happens to leave it as an uncached physical address
 		 * and we need it to be an uncached virtual, so we'll have to
 		 * convert it.
 		 */
-		if (!IS_AMO_PHYS_ADDRESS((u64) amos_page)) {
+		if (!IS_AMO_PHYS_ADDRESS((u64)amos_page)) {
 			dev_err(xpc_part, "previously used amos_page address "
-				"is bad = 0x%p\n", (void *) amos_page);
+				"is bad = 0x%p\n", (void *)amos_page);
 			return NULL;
 		}
-		amos_page = (AMO_t *) TO_AMO((u64) amos_page);
+		amos_page = (AMO_t *)TO_AMO((u64)amos_page);
 	}
 
 	/* clear xpc_vars */
@@ -267,22 +256,20 @@
 	xpc_vars->act_nasid = cpuid_to_nasid(0);
 	xpc_vars->act_phys_cpuid = cpu_physical_id(0);
 	xpc_vars->vars_part_pa = __pa(xpc_vars_part);
-	xpc_vars->amos_page_pa = ia64_tpa((u64) amos_page);
-	xpc_vars->amos_page = amos_page;  /* save for next load of XPC */
-
+	xpc_vars->amos_page_pa = ia64_tpa((u64)amos_page);
+	xpc_vars->amos_page = amos_page;	/* save for next load of XPC */
 
 	/* clear xpc_vars_part */
-	memset((u64 *) xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
-							XP_MAX_PARTITIONS);
+	memset((u64 *)xpc_vars_part, 0, sizeof(struct xpc_vars_part) *
+	       XP_MAX_PARTITIONS);
 
 	/* initialize the activate IRQ related AMO variables */
-	for (i = 0; i < xp_nasid_mask_words; i++) {
-		(void) xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i);
-	}
+	for (i = 0; i < xp_nasid_mask_words; i++)
+		(void)xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i);
 
 	/* initialize the engaged remote partitions related AMO variables */
-	(void) xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO);
-	(void) xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO);
+	(void)xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO);
+	(void)xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO);
 
 	/* timestamp of when reserved page was setup by XPC */
 	rp->stamp = CURRENT_TIME;
@@ -296,7 +283,6 @@
 	return rp;
 }
 
-
 /*
  * Change protections to allow IPI operations (and AMO operations on
  * Shub 1.1 systems).
@@ -307,39 +293,38 @@
 	int node;
 	int nasid;
 
-
-	// >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
+	/* >>> Change SH_IPI_ACCESS code to use SAL call once it is available */
 
 	if (is_shub2()) {
 		xpc_sh2_IPI_access0 =
-			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
+		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS0));
 		xpc_sh2_IPI_access1 =
-			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
+		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS1));
 		xpc_sh2_IPI_access2 =
-			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
+		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS2));
 		xpc_sh2_IPI_access3 =
-			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
+		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH2_IPI_ACCESS3));
 
 		for_each_online_node(node) {
 			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
-								-1UL);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
-								-1UL);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
-								-1UL);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
-								-1UL);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+			      -1UL);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+			      -1UL);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+			      -1UL);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+			      -1UL);
 		}
 
 	} else {
 		xpc_sh1_IPI_access =
-			(u64) HUB_L((u64 *) LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
+		    (u64)HUB_L((u64 *)LOCAL_MMR_ADDR(SH1_IPI_ACCESS));
 
 		for_each_online_node(node) {
 			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
-								-1UL);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+			      -1UL);
 
 			/*
 			 * Since the BIST collides with memory operations on
@@ -347,21 +332,23 @@
 			 */
 			if (enable_shub_wars_1_1()) {
 				/* open up everything */
-				xpc_prot_vec[node] = (u64) HUB_L((u64 *)
-						GLOBAL_MMR_ADDR(nasid,
-						SH1_MD_DQLP_MMR_DIR_PRIVEC0));
-				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
-						SH1_MD_DQLP_MMR_DIR_PRIVEC0),
-								-1UL);
-				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
-						SH1_MD_DQRP_MMR_DIR_PRIVEC0),
-								-1UL);
+				xpc_prot_vec[node] = (u64)HUB_L((u64 *)
+								GLOBAL_MMR_ADDR
+								(nasid,
+						  SH1_MD_DQLP_MMR_DIR_PRIVEC0));
+				HUB_S((u64 *)
+				      GLOBAL_MMR_ADDR(nasid,
+						   SH1_MD_DQLP_MMR_DIR_PRIVEC0),
+				      -1UL);
+				HUB_S((u64 *)
+				      GLOBAL_MMR_ADDR(nasid,
+						   SH1_MD_DQRP_MMR_DIR_PRIVEC0),
+				      -1UL);
 			}
 		}
 	}
 }
 
-
 /*
  * Restrict protections to disallow IPI operations (and AMO operations on
  * Shub 1.1 systems).
@@ -372,43 +359,41 @@
 	int node;
 	int nasid;
 
-
-	// >>> Change SH_IPI_ACCESS code to use SAL call once it is available.
+	/* >>> Change SH_IPI_ACCESS code to use SAL call once it is available */
 
 	if (is_shub2()) {
 
 		for_each_online_node(node) {
 			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
-							xpc_sh2_IPI_access0);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
-							xpc_sh2_IPI_access1);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
-							xpc_sh2_IPI_access2);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
-							xpc_sh2_IPI_access3);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS0),
+			      xpc_sh2_IPI_access0);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS1),
+			      xpc_sh2_IPI_access1);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS2),
+			      xpc_sh2_IPI_access2);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH2_IPI_ACCESS3),
+			      xpc_sh2_IPI_access3);
 		}
 
 	} else {
 
 		for_each_online_node(node) {
 			nasid = cnodeid_to_nasid(node);
-			HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
-							xpc_sh1_IPI_access);
+			HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid, SH1_IPI_ACCESS),
+			      xpc_sh1_IPI_access);
 
 			if (enable_shub_wars_1_1()) {
-				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
-						SH1_MD_DQLP_MMR_DIR_PRIVEC0),
-							xpc_prot_vec[node]);
-				HUB_S((u64 *) GLOBAL_MMR_ADDR(nasid,
-						SH1_MD_DQRP_MMR_DIR_PRIVEC0),
-							xpc_prot_vec[node]);
+				HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+						   SH1_MD_DQLP_MMR_DIR_PRIVEC0),
+				      xpc_prot_vec[node]);
+				HUB_S((u64 *)GLOBAL_MMR_ADDR(nasid,
+						   SH1_MD_DQRP_MMR_DIR_PRIVEC0),
+				      xpc_prot_vec[node]);
 			}
 		}
 	}
 }
 
-
 /*
  * At periodic intervals, scan through all active partitions and ensure
  * their heartbeat is still active.  If not, the partition is deactivated.
@@ -421,34 +406,31 @@
 	partid_t partid;
 	bte_result_t bres;
 
-
-	remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
+	remote_vars = (struct xpc_vars *)xpc_remote_copy_buffer;
 
 	for (partid = 1; partid < XP_MAX_PARTITIONS; partid++) {
 
-		if (xpc_exiting) {
+		if (xpc_exiting)
 			break;
-		}
 
-		if (partid == sn_partition_id) {
+		if (partid == sn_partition_id)
 			continue;
-		}
 
 		part = &xpc_partitions[partid];
 
 		if (part->act_state == XPC_P_INACTIVE ||
-				part->act_state == XPC_P_DEACTIVATING) {
+		    part->act_state == XPC_P_DEACTIVATING) {
 			continue;
 		}
 
 		/* pull the remote_hb cache line */
 		bres = xp_bte_copy(part->remote_vars_pa,
-					(u64) remote_vars,
-					XPC_RP_VARS_SIZE,
-					(BTE_NOTIFY | BTE_WACQUIRE), NULL);
+				   (u64)remote_vars,
+				   XPC_RP_VARS_SIZE,
+				   (BTE_NOTIFY | BTE_WACQUIRE), NULL);
 		if (bres != BTE_SUCCESS) {
 			XPC_DEACTIVATE_PARTITION(part,
-						xpc_map_bte_errors(bres));
+						 xpc_map_bte_errors(bres));
 			continue;
 		}
 
@@ -459,8 +441,8 @@
 			remote_vars->heartbeating_to_mask);
 
 		if (((remote_vars->heartbeat == part->last_heartbeat) &&
-			(remote_vars->heartbeat_offline == 0)) ||
-			     !xpc_hb_allowed(sn_partition_id, remote_vars)) {
+		     (remote_vars->heartbeat_offline == 0)) ||
+		    !xpc_hb_allowed(sn_partition_id, remote_vars)) {
 
 			XPC_DEACTIVATE_PARTITION(part, xpcNoHeartbeat);
 			continue;
@@ -470,7 +452,6 @@
 	}
 }
 
-
 /*
  * Get a copy of a portion of the remote partition's rsvd page.
  *
@@ -480,59 +461,48 @@
  */
 static enum xpc_retval
 xpc_get_remote_rp(int nasid, u64 *discovered_nasids,
-		struct xpc_rsvd_page *remote_rp, u64 *remote_rp_pa)
+		  struct xpc_rsvd_page *remote_rp, u64 *remote_rp_pa)
 {
 	int bres, i;
 
-
 	/* get the reserved page's physical address */
 
 	*remote_rp_pa = xpc_get_rsvd_page_pa(nasid);
-	if (*remote_rp_pa == 0) {
+	if (*remote_rp_pa == 0)
 		return xpcNoRsvdPageAddr;
-	}
-
 
 	/* pull over the reserved page header and part_nasids mask */
-	bres = xp_bte_copy(*remote_rp_pa, (u64) remote_rp,
-				XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes,
-				(BTE_NOTIFY | BTE_WACQUIRE), NULL);
-	if (bres != BTE_SUCCESS) {
+	bres = xp_bte_copy(*remote_rp_pa, (u64)remote_rp,
+			   XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes,
+			   (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+	if (bres != BTE_SUCCESS)
 		return xpc_map_bte_errors(bres);
-	}
-
 
 	if (discovered_nasids != NULL) {
 		u64 *remote_part_nasids = XPC_RP_PART_NASIDS(remote_rp);
 
-
-		for (i = 0; i < xp_nasid_mask_words; i++) {
+		for (i = 0; i < xp_nasid_mask_words; i++)
 			discovered_nasids[i] |= remote_part_nasids[i];
-		}
 	}
 
-
 	/* check that the partid is for another partition */
 
 	if (remote_rp->partid < 1 ||
-				remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
+	    remote_rp->partid > (XP_MAX_PARTITIONS - 1)) {
 		return xpcInvalidPartid;
 	}
 
-	if (remote_rp->partid == sn_partition_id) {
+	if (remote_rp->partid == sn_partition_id)
 		return xpcLocalPartid;
-	}
-
 
 	if (XPC_VERSION_MAJOR(remote_rp->version) !=
-					XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
+	    XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
 		return xpcBadVersion;
 	}
 
 	return xpcSuccess;
 }
 
-
 /*
  * Get a copy of the remote partition's XPC variables from the reserved page.
  *
@@ -544,34 +514,30 @@
 {
 	int bres;
 
-
-	if (remote_vars_pa == 0) {
+	if (remote_vars_pa == 0)
 		return xpcVarsNotSet;
-	}
 
 	/* pull over the cross partition variables */
-	bres = xp_bte_copy(remote_vars_pa, (u64) remote_vars, XPC_RP_VARS_SIZE,
-				(BTE_NOTIFY | BTE_WACQUIRE), NULL);
-	if (bres != BTE_SUCCESS) {
+	bres = xp_bte_copy(remote_vars_pa, (u64)remote_vars, XPC_RP_VARS_SIZE,
+			   (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+	if (bres != BTE_SUCCESS)
 		return xpc_map_bte_errors(bres);
-	}
 
 	if (XPC_VERSION_MAJOR(remote_vars->version) !=
-					XPC_VERSION_MAJOR(XPC_V_VERSION)) {
+	    XPC_VERSION_MAJOR(XPC_V_VERSION)) {
 		return xpcBadVersion;
 	}
 
 	return xpcSuccess;
 }
 
-
 /*
  * Update the remote partition's info.
  */
 static void
 xpc_update_partition_info(struct xpc_partition *part, u8 remote_rp_version,
-		struct timespec *remote_rp_stamp, u64 remote_rp_pa,
-		u64 remote_vars_pa, struct xpc_vars *remote_vars)
+			  struct timespec *remote_rp_stamp, u64 remote_rp_pa,
+			  u64 remote_vars_pa, struct xpc_vars *remote_vars)
 {
 	part->remote_rp_version = remote_rp_version;
 	dev_dbg(xpc_part, "  remote_rp_version = 0x%016x\n",
@@ -613,7 +579,6 @@
 		part->remote_vars_version);
 }
 
-
 /*
  * Prior code has determined the nasid which generated an IPI.  Inspect
  * that nasid to determine if its partition needs to be activated or
@@ -643,54 +608,51 @@
 	struct xpc_partition *part;
 	enum xpc_retval ret;
 
-
 	/* pull over the reserved page structure */
 
-	remote_rp = (struct xpc_rsvd_page *) xpc_remote_copy_buffer;
+	remote_rp = (struct xpc_rsvd_page *)xpc_remote_copy_buffer;
 
 	ret = xpc_get_remote_rp(nasid, NULL, remote_rp, &remote_rp_pa);
 	if (ret != xpcSuccess) {
 		dev_warn(xpc_part, "unable to get reserved page from nasid %d, "
-			"which sent interrupt, reason=%d\n", nasid, ret);
+			 "which sent interrupt, reason=%d\n", nasid, ret);
 		return;
 	}
 
 	remote_vars_pa = remote_rp->vars_pa;
 	remote_rp_version = remote_rp->version;
-	if (XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
+	if (XPC_SUPPORTS_RP_STAMP(remote_rp_version))
 		remote_rp_stamp = remote_rp->stamp;
-	}
+
 	partid = remote_rp->partid;
 	part = &xpc_partitions[partid];
 
-
 	/* pull over the cross partition variables */
 
-	remote_vars = (struct xpc_vars *) xpc_remote_copy_buffer;
+	remote_vars = (struct xpc_vars *)xpc_remote_copy_buffer;
 
 	ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
 	if (ret != xpcSuccess) {
 
 		dev_warn(xpc_part, "unable to get XPC variables from nasid %d, "
-			"which sent interrupt, reason=%d\n", nasid, ret);
+			 "which sent interrupt, reason=%d\n", nasid, ret);
 
 		XPC_DEACTIVATE_PARTITION(part, ret);
 		return;
 	}
 
-
 	part->act_IRQ_rcvd++;
 
 	dev_dbg(xpc_part, "partid for nasid %d is %d; IRQs = %d; HB = "
-		"%ld:0x%lx\n", (int) nasid, (int) partid, part->act_IRQ_rcvd,
+		"%ld:0x%lx\n", (int)nasid, (int)partid, part->act_IRQ_rcvd,
 		remote_vars->heartbeat, remote_vars->heartbeating_to_mask);
 
 	if (xpc_partition_disengaged(part) &&
-					part->act_state == XPC_P_INACTIVE) {
+	    part->act_state == XPC_P_INACTIVE) {
 
 		xpc_update_partition_info(part, remote_rp_version,
-					&remote_rp_stamp, remote_rp_pa,
-					remote_vars_pa, remote_vars);
+					  &remote_rp_stamp, remote_rp_pa,
+					  remote_vars_pa, remote_vars);
 
 		if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
 			if (xpc_partition_disengage_requested(1UL << partid)) {
@@ -714,16 +676,15 @@
 
 	if (!XPC_SUPPORTS_RP_STAMP(part->remote_rp_version)) {
 		DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(part->
-							remote_vars_version));
+						       remote_vars_version));
 
 		if (!XPC_SUPPORTS_RP_STAMP(remote_rp_version)) {
 			DBUG_ON(XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
-								version));
+							       version));
 			/* see if the other side rebooted */
 			if (part->remote_amos_page_pa ==
-				remote_vars->amos_page_pa &&
-					xpc_hb_allowed(sn_partition_id,
-								remote_vars)) {
+			    remote_vars->amos_page_pa &&
+			    xpc_hb_allowed(sn_partition_id, remote_vars)) {
 				/* doesn't look that way, so ignore the IPI */
 				return;
 			}
@@ -735,8 +696,8 @@
 		 */
 
 		xpc_update_partition_info(part, remote_rp_version,
-						&remote_rp_stamp, remote_rp_pa,
-						remote_vars_pa, remote_vars);
+					  &remote_rp_stamp, remote_rp_pa,
+					  remote_vars_pa, remote_vars);
 		part->reactivate_nasid = nasid;
 		XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
 		return;
@@ -756,15 +717,15 @@
 		xpc_clear_partition_disengage_request(1UL << partid);
 
 		xpc_update_partition_info(part, remote_rp_version,
-						&remote_rp_stamp, remote_rp_pa,
-						remote_vars_pa, remote_vars);
+					  &remote_rp_stamp, remote_rp_pa,
+					  remote_vars_pa, remote_vars);
 		reactivate = 1;
 
 	} else {
 		DBUG_ON(!XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->version));
 
 		stamp_diff = xpc_compare_stamps(&part->remote_rp_stamp,
-							&remote_rp_stamp);
+						&remote_rp_stamp);
 		if (stamp_diff != 0) {
 			DBUG_ON(stamp_diff >= 0);
 
@@ -775,17 +736,18 @@
 
 			DBUG_ON(xpc_partition_engaged(1UL << partid));
 			DBUG_ON(xpc_partition_disengage_requested(1UL <<
-								partid));
+								  partid));
 
 			xpc_update_partition_info(part, remote_rp_version,
-						&remote_rp_stamp, remote_rp_pa,
-						remote_vars_pa, remote_vars);
+						  &remote_rp_stamp,
+						  remote_rp_pa, remote_vars_pa,
+						  remote_vars);
 			reactivate = 1;
 		}
 	}
 
 	if (part->disengage_request_timeout > 0 &&
-					!xpc_partition_disengaged(part)) {
+	    !xpc_partition_disengaged(part)) {
 		/* still waiting on other side to disengage from us */
 		return;
 	}
@@ -795,12 +757,11 @@
 		XPC_DEACTIVATE_PARTITION(part, xpcReactivating);
 
 	} else if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version) &&
-			xpc_partition_disengage_requested(1UL << partid)) {
+		   xpc_partition_disengage_requested(1UL << partid)) {
 		XPC_DEACTIVATE_PARTITION(part, xpcOtherGoingDown);
 	}
 }
 
-
 /*
  * Loop through the activation AMO variables and process any bits
  * which are set.  Each bit indicates a nasid sending a partition
@@ -813,20 +774,17 @@
 {
 	int word, bit;
 	u64 nasid_mask;
-	u64 nasid;			/* remote nasid */
+	u64 nasid;		/* remote nasid */
 	int n_IRQs_detected = 0;
 	AMO_t *act_amos;
 
-
 	act_amos = xpc_vars->amos_page + XPC_ACTIVATE_IRQ_AMOS;
 
-
 	/* scan through act AMO variable looking for non-zero entries */
 	for (word = 0; word < xp_nasid_mask_words; word++) {
 
-		if (xpc_exiting) {
+		if (xpc_exiting)
 			break;
-		}
 
 		nasid_mask = xpc_IPI_receive(&act_amos[word]);
 		if (nasid_mask == 0) {
@@ -837,7 +795,6 @@
 		dev_dbg(xpc_part, "AMO[%d] gave back 0x%lx\n", word,
 			nasid_mask);
 
-
 		/*
 		 * If this nasid has been added to the machine since
 		 * our partition was reset, this will retain the
@@ -846,7 +803,6 @@
 		 */
 		xpc_mach_nasids[word] |= nasid_mask;
 
-
 		/* locate the nasid(s) which sent interrupts */
 
 		for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
@@ -862,7 +818,6 @@
 	return n_IRQs_detected;
 }
 
-
 /*
  * See if the other side has responded to a partition disengage request
  * from us.
@@ -873,11 +828,11 @@
 	partid_t partid = XPC_PARTID(part);
 	int disengaged;
 
-
 	disengaged = (xpc_partition_engaged(1UL << partid) == 0);
 	if (part->disengage_request_timeout) {
 		if (!disengaged) {
-			if (time_before(jiffies, part->disengage_request_timeout)) {
+			if (time_before(jiffies,
+			    part->disengage_request_timeout)) {
 				/* timelimit hasn't been reached yet */
 				return 0;
 			}
@@ -888,7 +843,7 @@
 			 */
 
 			dev_info(xpc_part, "disengage from remote partition %d "
-				"timed out\n", partid);
+				 "timed out\n", partid);
 			xpc_disengage_request_timedout = 1;
 			xpc_clear_partition_engaged(1UL << partid);
 			disengaged = 1;
@@ -898,23 +853,20 @@
 		/* cancel the timer function, provided it's not us */
 		if (!in_interrupt()) {
 			del_singleshot_timer_sync(&part->
-						      disengage_request_timer);
+						  disengage_request_timer);
 		}
 
 		DBUG_ON(part->act_state != XPC_P_DEACTIVATING &&
-					part->act_state != XPC_P_INACTIVE);
-		if (part->act_state != XPC_P_INACTIVE) {
+			part->act_state != XPC_P_INACTIVE);
+		if (part->act_state != XPC_P_INACTIVE)
 			xpc_wakeup_channel_mgr(part);
-		}
 
-		if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version)) {
+		if (XPC_SUPPORTS_DISENGAGE_REQUEST(part->remote_vars_version))
 			xpc_cancel_partition_disengage_request(part);
-		}
 	}
 	return disengaged;
 }
 
-
 /*
  * Mark specified partition as active.
  */
@@ -924,7 +876,6 @@
 	unsigned long irq_flags;
 	enum xpc_retval ret;
 
-
 	dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part));
 
 	spin_lock_irqsave(&part->act_lock, irq_flags);
@@ -940,17 +891,15 @@
 	return ret;
 }
 
-
 /*
  * Notify XPC that the partition is down.
  */
 void
 xpc_deactivate_partition(const int line, struct xpc_partition *part,
-				enum xpc_retval reason)
+			 enum xpc_retval reason)
 {
 	unsigned long irq_flags;
 
-
 	spin_lock_irqsave(&part->act_lock, irq_flags);
 
 	if (part->act_state == XPC_P_INACTIVE) {
@@ -964,7 +913,7 @@
 	}
 	if (part->act_state == XPC_P_DEACTIVATING) {
 		if ((part->reason == xpcUnloading && reason != xpcUnloading) ||
-					reason == xpcReactivating) {
+		    reason == xpcReactivating) {
 			XPC_SET_REASON(part, reason, line);
 		}
 		spin_unlock_irqrestore(&part->act_lock, irq_flags);
@@ -982,9 +931,9 @@
 
 		/* set a timelimit on the disengage request */
 		part->disengage_request_timeout = jiffies +
-					(xpc_disengage_request_timelimit * HZ);
+		    (xpc_disengage_request_timelimit * HZ);
 		part->disengage_request_timer.expires =
-					part->disengage_request_timeout;
+		    part->disengage_request_timeout;
 		add_timer(&part->disengage_request_timer);
 	}
 
@@ -994,7 +943,6 @@
 	xpc_partition_going_down(part, reason);
 }
 
-
 /*
  * Mark specified partition as inactive.
  */
@@ -1003,7 +951,6 @@
 {
 	unsigned long irq_flags;
 
-
 	dev_dbg(xpc_part, "setting partition %d to INACTIVE\n",
 		XPC_PARTID(part));
 
@@ -1013,7 +960,6 @@
 	part->remote_rp_pa = 0;
 }
 
-
 /*
  * SAL has provided a partition and machine mask.  The partition mask
  * contains a bit for each even nasid in our partition.  The machine
@@ -1041,24 +987,22 @@
 	u64 *discovered_nasids;
 	enum xpc_retval ret;
 
-
 	remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
-						xp_nasid_mask_bytes,
-						GFP_KERNEL, &remote_rp_base);
-	if (remote_rp == NULL) {
+						  xp_nasid_mask_bytes,
+						  GFP_KERNEL, &remote_rp_base);
+	if (remote_rp == NULL)
 		return;
-	}
-	remote_vars = (struct xpc_vars *) remote_rp;
 
+	remote_vars = (struct xpc_vars *)remote_rp;
 
 	discovered_nasids = kzalloc(sizeof(u64) * xp_nasid_mask_words,
-							GFP_KERNEL);
+				    GFP_KERNEL);
 	if (discovered_nasids == NULL) {
 		kfree(remote_rp_base);
 		return;
 	}
 
-	rp = (struct xpc_rsvd_page *) xpc_rsvd_page;
+	rp = (struct xpc_rsvd_page *)xpc_rsvd_page;
 
 	/*
 	 * The term 'region' in this context refers to the minimum number of
@@ -1081,23 +1025,19 @@
 
 	for (region = 0; region < max_regions; region++) {
 
-		if ((volatile int) xpc_exiting) {
+		if (xpc_exiting)
 			break;
-		}
 
 		dev_dbg(xpc_part, "searching region %d\n", region);
 
 		for (nasid = (region * region_size * 2);
-		     nasid < ((region + 1) * region_size * 2);
-		     nasid += 2) {
+		     nasid < ((region + 1) * region_size * 2); nasid += 2) {
 
-			if ((volatile int) xpc_exiting) {
+			if (xpc_exiting)
 				break;
-			}
 
 			dev_dbg(xpc_part, "checking nasid %d\n", nasid);
 
-
 			if (XPC_NASID_IN_ARRAY(nasid, xpc_part_nasids)) {
 				dev_dbg(xpc_part, "PROM indicates Nasid %d is "
 					"part of the local partition; skipping "
@@ -1119,19 +1059,18 @@
 				continue;
 			}
 
-
 			/* pull over the reserved page structure */
 
 			ret = xpc_get_remote_rp(nasid, discovered_nasids,
-					      remote_rp, &remote_rp_pa);
+						remote_rp, &remote_rp_pa);
 			if (ret != xpcSuccess) {
 				dev_dbg(xpc_part, "unable to get reserved page "
 					"from nasid %d, reason=%d\n", nasid,
 					ret);
 
-				if (ret == xpcLocalPartid) {
+				if (ret == xpcLocalPartid)
 					break;
-				}
+
 				continue;
 			}
 
@@ -1140,7 +1079,6 @@
 			partid = remote_rp->partid;
 			part = &xpc_partitions[partid];
 
-
 			/* pull over the cross partition variables */
 
 			ret = xpc_get_remote_vars(remote_vars_pa, remote_vars);
@@ -1171,15 +1109,15 @@
 			 * get the same page for remote_act_amos_pa after
 			 * module reloads and system reboots.
 			 */
-			if (sn_register_xp_addr_region(
-					    remote_vars->amos_page_pa,
-							PAGE_SIZE, 1) < 0) {
-				dev_dbg(xpc_part, "partition %d failed to "
+			if (sn_register_xp_addr_region
+			    (remote_vars->amos_page_pa, PAGE_SIZE, 1) < 0) {
+				dev_dbg(xpc_part,
+					"partition %d failed to "
 					"register xp_addr region 0x%016lx\n",
 					partid, remote_vars->amos_page_pa);
 
 				XPC_SET_REASON(part, xpcPhysAddrRegFailed,
-						__LINE__);
+					       __LINE__);
 				break;
 			}
 
@@ -1195,9 +1133,9 @@
 				remote_vars->act_phys_cpuid);
 
 			if (XPC_SUPPORTS_DISENGAGE_REQUEST(remote_vars->
-								version)) {
+							   version)) {
 				part->remote_amos_page_pa =
-						remote_vars->amos_page_pa;
+				    remote_vars->amos_page_pa;
 				xpc_mark_partition_disengaged(part);
 				xpc_cancel_partition_disengage_request(part);
 			}
@@ -1209,7 +1147,6 @@
 	kfree(remote_rp_base);
 }
 
-
 /*
  * Given a partid, get the nasids owned by that partition from the
  * remote partition's reserved page.
@@ -1221,19 +1158,17 @@
 	u64 part_nasid_pa;
 	int bte_res;
 
-
 	part = &xpc_partitions[partid];
-	if (part->remote_rp_pa == 0) {
+	if (part->remote_rp_pa == 0)
 		return xpcPartitionDown;
-	}
 
 	memset(nasid_mask, 0, XP_NASID_MASK_BYTES);
 
-	part_nasid_pa = (u64) XPC_RP_PART_NASIDS(part->remote_rp_pa);
+	part_nasid_pa = (u64)XPC_RP_PART_NASIDS(part->remote_rp_pa);
 
-	bte_res = xp_bte_copy(part_nasid_pa, (u64) nasid_mask,
-			xp_nasid_mask_bytes, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
+	bte_res = xp_bte_copy(part_nasid_pa, (u64)nasid_mask,
+			      xp_nasid_mask_bytes, (BTE_NOTIFY | BTE_WACQUIRE),
+			      NULL);
 
 	return xpc_map_bte_errors(bte_res);
 }
-
diff --git a/arch/ia64/sn/kernel/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
similarity index 89%
rename from arch/ia64/sn/kernel/xpnet.c
rename to drivers/misc/sgi-xp/xpnet.c
index a5df672..a9543c6 100644
--- a/arch/ia64/sn/kernel/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -3,10 +3,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1999,2001-2005 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 1999-2008 Silicon Graphics, Inc. All rights reserved.
  */
 
-
 /*
  * Cross Partition Network Interface (XPNET) support
  *
@@ -21,8 +20,8 @@
  *
  */
 
-
 #include <linux/module.h>
+#include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/ioport.h>
@@ -36,10 +35,8 @@
 #include <asm/sn/bte.h>
 #include <asm/sn/io.h>
 #include <asm/sn/sn_sal.h>
-#include <asm/types.h>
 #include <asm/atomic.h>
-#include <asm/sn/xp.h>
-
+#include "xp.h"
 
 /*
  * The message payload transferred by XPC.
@@ -79,7 +76,6 @@
 #define XPNET_MSG_ALIGNED_SIZE	(L1_CACHE_ALIGN(XPNET_MSG_SIZE))
 #define XPNET_MSG_NENTRIES	(PAGE_SIZE / XPNET_MSG_ALIGNED_SIZE)
 
-
 #define XPNET_MAX_KTHREADS	(XPNET_MSG_NENTRIES + 1)
 #define XPNET_MAX_IDLE_KTHREADS	(XPNET_MSG_NENTRIES + 1)
 
@@ -91,9 +87,9 @@
 #define XPNET_VERSION_MAJOR(_v)		((_v) >> 4)
 #define XPNET_VERSION_MINOR(_v)		((_v) & 0xf)
 
-#define	XPNET_VERSION _XPNET_VERSION(1,0)		/* version 1.0 */
-#define	XPNET_VERSION_EMBED _XPNET_VERSION(1,1)		/* version 1.1 */
-#define XPNET_MAGIC	0x88786984 /* "XNET" */
+#define	XPNET_VERSION _XPNET_VERSION(1, 0)	/* version 1.0 */
+#define	XPNET_VERSION_EMBED _XPNET_VERSION(1, 1)	/* version 1.1 */
+#define XPNET_MAGIC	0x88786984	/* "XNET" */
 
 #define XPNET_VALID_MSG(_m)						     \
    ((XPNET_VERSION_MAJOR(_m->version) == XPNET_VERSION_MAJOR(XPNET_VERSION)) \
@@ -101,7 +97,6 @@
 
 #define XPNET_DEVICE_NAME		"xp0"
 
-
 /*
  * When messages are queued with xpc_send_notify, a kmalloc'd buffer
  * of the following type is passed as a notification cookie.  When the
@@ -145,7 +140,6 @@
 /* 32KB has been determined to be the ideal */
 #define XPNET_DEF_MTU (0x8000UL)
 
-
 /*
  * The partition id is encapsulated in the MAC address.  The following
  * define locates the octet the partid is in.
@@ -153,7 +147,6 @@
 #define XPNET_PARTID_OCTET	1
 #define XPNET_LICENSE_OCTET	2
 
-
 /*
  * Define the XPNET debug device structure that is to be used with dev_dbg(),
  * dev_err(), dev_warn(), and dev_info().
@@ -163,7 +156,7 @@
 };
 
 struct device xpnet_dbg_subname = {
-	.bus_id = {0},			/* set to "" */
+	.bus_id = {0},		/* set to "" */
 	.driver = &xpnet_dbg_name
 };
 
@@ -178,14 +171,13 @@
 	struct sk_buff *skb;
 	bte_result_t bret;
 	struct xpnet_dev_private *priv =
-		(struct xpnet_dev_private *) xpnet_device->priv;
-
+	    (struct xpnet_dev_private *)xpnet_device->priv;
 
 	if (!XPNET_VALID_MSG(msg)) {
 		/*
 		 * Packet with a different XPC version.  Ignore.
 		 */
-		xpc_received(partid, channel, (void *) msg);
+		xpc_received(partid, channel, (void *)msg);
 
 		priv->stats.rx_errors++;
 
@@ -194,14 +186,13 @@
 	dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
 		msg->leadin_ignore, msg->tailout_ignore);
 
-
 	/* reserve an extra cache line */
 	skb = dev_alloc_skb(msg->size + L1_CACHE_BYTES);
 	if (!skb) {
 		dev_err(xpnet, "failed on dev_alloc_skb(%d)\n",
 			msg->size + L1_CACHE_BYTES);
 
-		xpc_received(partid, channel, (void *) msg);
+		xpc_received(partid, channel, (void *)msg);
 
 		priv->stats.rx_errors++;
 
@@ -227,12 +218,13 @@
 	 * Move the data over from the other side.
 	 */
 	if ((XPNET_VERSION_MINOR(msg->version) == 1) &&
-						(msg->embedded_bytes != 0)) {
+	    (msg->embedded_bytes != 0)) {
 		dev_dbg(xpnet, "copying embedded message. memcpy(0x%p, 0x%p, "
 			"%lu)\n", skb->data, &msg->data,
-			(size_t) msg->embedded_bytes);
+			(size_t)msg->embedded_bytes);
 
-		skb_copy_to_linear_data(skb, &msg->data, (size_t)msg->embedded_bytes);
+		skb_copy_to_linear_data(skb, &msg->data,
+					(size_t)msg->embedded_bytes);
 	} else {
 		dev_dbg(xpnet, "transferring buffer to the skb->data area;\n\t"
 			"bte_copy(0x%p, 0x%p, %hu)\n", (void *)msg->buf_pa,
@@ -244,16 +236,18 @@
 				msg->size, (BTE_NOTIFY | BTE_WACQUIRE), NULL);
 
 		if (bret != BTE_SUCCESS) {
-			// >>> Need better way of cleaning skb.  Currently skb
-			// >>> appears in_use and we can't just call
-			// >>> dev_kfree_skb.
+			/*
+			 * >>> Need better way of cleaning skb.  Currently skb
+			 * >>> appears in_use and we can't just call
+			 * >>> dev_kfree_skb.
+			 */
 			dev_err(xpnet, "bte_copy(0x%p, 0x%p, 0x%hx) returned "
 				"error=0x%x\n", (void *)msg->buf_pa,
 				(void *)__pa((u64)skb->data &
-							~(L1_CACHE_BYTES - 1)),
+					     ~(L1_CACHE_BYTES - 1)),
 				msg->size, bret);
 
-			xpc_received(partid, channel, (void *) msg);
+			xpc_received(partid, channel, (void *)msg);
 
 			priv->stats.rx_errors++;
 
@@ -262,7 +256,7 @@
 	}
 
 	dev_dbg(xpnet, "<skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
-		"skb->end=0x%p skb->len=%d\n", (void *) skb->head,
+		"skb->end=0x%p skb->len=%d\n", (void *)skb->head,
 		(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
 		skb->len);
 
@@ -275,16 +269,14 @@
 		(void *)skb->head, (void *)skb->data, skb_tail_pointer(skb),
 		skb_end_pointer(skb), skb->len);
 
-
 	xpnet_device->last_rx = jiffies;
 	priv->stats.rx_packets++;
 	priv->stats.rx_bytes += skb->len + ETH_HLEN;
 
 	netif_rx_ni(skb);
-	xpc_received(partid, channel, (void *) msg);
+	xpc_received(partid, channel, (void *)msg);
 }
 
-
 /*
  * This is the handler which XPC calls during any sort of change in
  * state or message reception on a connection.
@@ -295,20 +287,19 @@
 {
 	long bp;
 
-
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);
 	DBUG_ON(channel != XPC_NET_CHANNEL);
 
-	switch(reason) {
+	switch (reason) {
 	case xpcMsgReceived:	/* message received */
 		DBUG_ON(data == NULL);
 
-		xpnet_receive(partid, channel, (struct xpnet_message *) data);
+		xpnet_receive(partid, channel, (struct xpnet_message *)data);
 		break;
 
 	case xpcConnected:	/* connection completed to a partition */
 		spin_lock_bh(&xpnet_broadcast_lock);
-		xpnet_broadcast_partitions |= 1UL << (partid -1 );
+		xpnet_broadcast_partitions |= 1UL << (partid - 1);
 		bp = xpnet_broadcast_partitions;
 		spin_unlock_bh(&xpnet_broadcast_lock);
 
@@ -321,13 +312,12 @@
 
 	default:
 		spin_lock_bh(&xpnet_broadcast_lock);
-		xpnet_broadcast_partitions &= ~(1UL << (partid -1 ));
+		xpnet_broadcast_partitions &= ~(1UL << (partid - 1));
 		bp = xpnet_broadcast_partitions;
 		spin_unlock_bh(&xpnet_broadcast_lock);
 
-		if (bp == 0) {
+		if (bp == 0)
 			netif_carrier_off(xpnet_device);
-		}
 
 		dev_dbg(xpnet, "%s disconnected from partition %d; "
 			"xpnet_broadcast_partitions=0x%lx\n",
@@ -337,13 +327,11 @@
 	}
 }
 
-
 static int
 xpnet_dev_open(struct net_device *dev)
 {
 	enum xpc_retval ret;
 
-
 	dev_dbg(xpnet, "calling xpc_connect(%d, 0x%p, NULL, %ld, %ld, %ld, "
 		"%ld)\n", XPC_NET_CHANNEL, xpnet_connection_activity,
 		XPNET_MSG_SIZE, XPNET_MSG_NENTRIES, XPNET_MAX_KTHREADS,
@@ -364,7 +352,6 @@
 	return 0;
 }
 
-
 static int
 xpnet_dev_stop(struct net_device *dev)
 {
@@ -375,7 +362,6 @@
 	return 0;
 }
 
-
 static int
 xpnet_dev_change_mtu(struct net_device *dev, int new_mtu)
 {
@@ -392,7 +378,6 @@
 	return 0;
 }
 
-
 /*
  * Required for the net_device structure.
  */
@@ -402,7 +387,6 @@
 	return 0;
 }
 
-
 /*
  * Return statistics to the caller.
  */
@@ -411,13 +395,11 @@
 {
 	struct xpnet_dev_private *priv;
 
-
-	priv = (struct xpnet_dev_private *) dev->priv;
+	priv = (struct xpnet_dev_private *)dev->priv;
 
 	return &priv->stats;
 }
 
-
 /*
  * Notification that the other end has received the message and
  * DMA'd the skb information.  At this point, they are done with
@@ -426,11 +408,9 @@
  */
 static void
 xpnet_send_completed(enum xpc_retval reason, partid_t partid, int channel,
-			void *__qm)
+		     void *__qm)
 {
-	struct xpnet_pending_msg *queued_msg =
-		(struct xpnet_pending_msg *) __qm;
-
+	struct xpnet_pending_msg *queued_msg = (struct xpnet_pending_msg *)__qm;
 
 	DBUG_ON(queued_msg == NULL);
 
@@ -439,14 +419,13 @@
 
 	if (atomic_dec_return(&queued_msg->use_count) == 0) {
 		dev_dbg(xpnet, "all acks for skb->head=-x%p\n",
-			(void *) queued_msg->skb->head);
+			(void *)queued_msg->skb->head);
 
 		dev_kfree_skb_any(queued_msg->skb);
 		kfree(queued_msg);
 	}
 }
 
-
 /*
  * Network layer has formatted a packet (skb) and is ready to place it
  * "on the wire".  Prepare and send an xpnet_message to all partitions
@@ -469,16 +448,13 @@
 	struct xpnet_dev_private *priv;
 	u16 embedded_bytes;
 
-
-	priv = (struct xpnet_dev_private *) dev->priv;
-
+	priv = (struct xpnet_dev_private *)dev->priv;
 
 	dev_dbg(xpnet, ">skb->head=0x%p skb->data=0x%p skb->tail=0x%p "
-		"skb->end=0x%p skb->len=%d\n", (void *) skb->head,
+		"skb->end=0x%p skb->len=%d\n", (void *)skb->head,
 		(void *)skb->data, skb_tail_pointer(skb), skb_end_pointer(skb),
 		skb->len);
 
-
 	/*
 	 * The xpnet_pending_msg tracks how many outstanding
 	 * xpc_send_notifies are relying on this skb.  When none
@@ -487,16 +463,15 @@
 	queued_msg = kmalloc(sizeof(struct xpnet_pending_msg), GFP_ATOMIC);
 	if (queued_msg == NULL) {
 		dev_warn(xpnet, "failed to kmalloc %ld bytes; dropping "
-			"packet\n", sizeof(struct xpnet_pending_msg));
+			 "packet\n", sizeof(struct xpnet_pending_msg));
 
 		priv->stats.tx_errors++;
 
 		return -ENOMEM;
 	}
 
-
 	/* get the beginning of the first cacheline and end of last */
-	start_addr = ((u64) skb->data & ~(L1_CACHE_BYTES - 1));
+	start_addr = ((u64)skb->data & ~(L1_CACHE_BYTES - 1));
 	end_addr = L1_CACHE_ALIGN((u64)skb_tail_pointer(skb));
 
 	/* calculate how many bytes to embed in the XPC message */
@@ -506,7 +481,6 @@
 		embedded_bytes = skb->len;
 	}
 
-
 	/*
 	 * Since the send occurs asynchronously, we set the count to one
 	 * and begin sending.  Any sends that happen to complete before
@@ -517,14 +491,13 @@
 	atomic_set(&queued_msg->use_count, 1);
 	queued_msg->skb = skb;
 
-
 	second_mac_octet = skb->data[XPNET_PARTID_OCTET];
 	if (second_mac_octet == 0xff) {
 		/* we are being asked to broadcast to all partitions */
 		dp = xpnet_broadcast_partitions;
 	} else if (second_mac_octet != 0) {
 		dp = xpnet_broadcast_partitions &
-					(1UL << (second_mac_octet - 1));
+		    (1UL << (second_mac_octet - 1));
 	} else {
 		/* 0 is an invalid partid.  Ignore */
 		dp = 0;
@@ -543,7 +516,6 @@
 	for (dest_partid = 1; dp && dest_partid < XP_MAX_PARTITIONS;
 	     dest_partid++) {
 
-
 		if (!(dp & (1UL << (dest_partid - 1)))) {
 			/* not destined for this partition */
 			continue;
@@ -552,20 +524,18 @@
 		/* remove this partition from the destinations mask */
 		dp &= ~(1UL << (dest_partid - 1));
 
-
 		/* found a partition to send to */
 
 		ret = xpc_allocate(dest_partid, XPC_NET_CHANNEL,
 				   XPC_NOWAIT, (void **)&msg);
-		if (unlikely(ret != xpcSuccess)) {
+		if (unlikely(ret != xpcSuccess))
 			continue;
-		}
 
 		msg->embedded_bytes = embedded_bytes;
 		if (unlikely(embedded_bytes != 0)) {
 			msg->version = XPNET_VERSION_EMBED;
 			dev_dbg(xpnet, "calling memcpy(0x%p, 0x%p, 0x%lx)\n",
-				&msg->data, skb->data, (size_t) embedded_bytes);
+				&msg->data, skb->data, (size_t)embedded_bytes);
 			skb_copy_from_linear_data(skb, &msg->data,
 						  (size_t)embedded_bytes);
 		} else {
@@ -573,7 +543,7 @@
 		}
 		msg->magic = XPNET_MAGIC;
 		msg->size = end_addr - start_addr;
-		msg->leadin_ignore = (u64) skb->data - start_addr;
+		msg->leadin_ignore = (u64)skb->data - start_addr;
 		msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
 		msg->buf_pa = __pa(start_addr);
 
@@ -583,7 +553,6 @@
 			dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
 			msg->leadin_ignore, msg->tailout_ignore);
 
-
 		atomic_inc(&queued_msg->use_count);
 
 		ret = xpc_send_notify(dest_partid, XPC_NET_CHANNEL, msg,
@@ -592,14 +561,12 @@
 			atomic_dec(&queued_msg->use_count);
 			continue;
 		}
-
 	}
 
 	if (atomic_dec_return(&queued_msg->use_count) == 0) {
 		dev_dbg(xpnet, "no partitions to receive packet destined for "
 			"%d\n", dest_partid);
 
-
 		dev_kfree_skb(skb);
 		kfree(queued_msg);
 	}
@@ -610,23 +577,20 @@
 	return 0;
 }
 
-
 /*
  * Deal with transmit timeouts coming from the network layer.
  */
 static void
-xpnet_dev_tx_timeout (struct net_device *dev)
+xpnet_dev_tx_timeout(struct net_device *dev)
 {
 	struct xpnet_dev_private *priv;
 
-
-	priv = (struct xpnet_dev_private *) dev->priv;
+	priv = (struct xpnet_dev_private *)dev->priv;
 
 	priv->stats.tx_errors++;
 	return;
 }
 
-
 static int __init
 xpnet_init(void)
 {
@@ -634,10 +598,8 @@
 	u32 license_num;
 	int result = -ENOMEM;
 
-
-	if (!ia64_platform_is("sn2")) {
+	if (!ia64_platform_is("sn2"))
 		return -ENODEV;
-	}
 
 	dev_info(xpnet, "registering network device %s\n", XPNET_DEVICE_NAME);
 
@@ -647,9 +609,8 @@
 	 */
 	xpnet_device = alloc_netdev(sizeof(struct xpnet_dev_private),
 				    XPNET_DEVICE_NAME, ether_setup);
-	if (xpnet_device == NULL) {
+	if (xpnet_device == NULL)
 		return -ENOMEM;
-	}
 
 	netif_carrier_off(xpnet_device);
 
@@ -672,7 +633,7 @@
 	license_num = sn_partition_serial_number_val();
 	for (i = 3; i >= 0; i--) {
 		xpnet_device->dev_addr[XPNET_LICENSE_OCTET + i] =
-							license_num & 0xff;
+		    license_num & 0xff;
 		license_num = license_num >> 8;
 	}
 
@@ -690,29 +651,27 @@
 	xpnet_device->features = NETIF_F_NO_CSUM;
 
 	result = register_netdev(xpnet_device);
-	if (result != 0) {
+	if (result != 0)
 		free_netdev(xpnet_device);
-	}
 
 	return result;
 }
-module_init(xpnet_init);
 
+module_init(xpnet_init);
 
 static void __exit
 xpnet_exit(void)
 {
 	dev_info(xpnet, "unregistering network device %s\n",
-		xpnet_device[0].name);
+		 xpnet_device[0].name);
 
 	unregister_netdev(xpnet_device);
 
 	free_netdev(xpnet_device);
 }
-module_exit(xpnet_exit);
 
+module_exit(xpnet_exit);
 
 MODULE_AUTHOR("Silicon Graphics, Inc.");
 MODULE_DESCRIPTION("Cross Partition Network adapter (XPNET)");
 MODULE_LICENSE("GPL");
-
diff --git a/include/asm-ia64/mca.h b/include/asm-ia64/mca.h
index f1663aa..18a4321 100644
--- a/include/asm-ia64/mca.h
+++ b/include/asm-ia64/mca.h
@@ -157,6 +157,7 @@
 struct ia64_mca_notify_die {
 	struct ia64_sal_os_state *sos;
 	int *monarch_cpu;
+	int *data;
 };
 
 DECLARE_PER_CPU(u64, ia64_mca_pal_base);