Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Prefetch mmap_sem in ia64_do_page_fault()
  [IA64] Failure to resume after INIT in user space
  [IA64] Pass more data to the MCA/INIT notify_die hooks
  [IA64] always map VGA framebuffer UC, even if it supports WB
  [IA64] fix bug in ia64 __mutex_fastpath_trylock
  [IA64] for_each_possible_cpu: ia64
  [IA64] update HP CSR space discovery via ACPI
  [IA64] Wire up new syscalls {set,get}_robust_list
  [IA64] 'msg' may be used uninitialized in xpc_initiate_allocate()
  [IA64] Wire up new syscall sync_file_range()

arch/ia64/kernel/acpi-ext.c

@@ -1,105 +1,104 @@
 /*
- * arch/ia64/kernel/acpi-ext.c
+ * (c) Copyright 2003, 2006 Hewlett-Packard Development Company, L.P.
+ *	Alex Williamson <alex.williamson@hp.com>
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
  *
- * Copyright (C) 2003 Hewlett-Packard
+ * This program is free software; you can redistribute it and/or modify
- * Copyright (C) Alex Williamson
+ * it under the terms of the GNU General Public License version 2 as
- * Copyright (C) Bjorn Helgaas
+ * published by the Free Software Foundation.
- *
- * Vendor specific extensions to ACPI.
  */
 
 #include <linux/config.h>
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/acpi.h>
-#include <linux/efi.h>
 
 #include <asm/acpi-ext.h>
 
-struct acpi_vendor_descriptor {
+/*
-	u8 guid_id;
+ * Device CSRs that do not appear in PCI config space should be described
-	efi_guid_t guid;
+ * via ACPI.  This would normally be done with Address Space Descriptors
+ * marked as "consumer-only," but old versions of Windows and Linux ignore
+ * the producer/consumer flag, so HP invented a vendor-defined resource to
+ * describe the location and size of CSR space.
+ */
+
+struct acpi_vendor_uuid hp_ccsr_uuid = {
+	.subtype = 2,
+	.data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
+	    0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
 };
 
-struct acpi_vendor_info {
+static acpi_status hp_ccsr_locate(acpi_handle obj, u64 *base, u64 *length)
-	struct acpi_vendor_descriptor *descriptor;
-	u8 *data;
-	u32 length;
-};
-
-acpi_status
-acpi_vendor_resource_match(struct acpi_resource *resource, void *context)
-{
-	struct acpi_vendor_info *info = (struct acpi_vendor_info *)context;
-	struct acpi_resource_vendor *vendor;
-	struct acpi_vendor_descriptor *descriptor;
-	u32 byte_length;
-
-	if (resource->type != ACPI_RESOURCE_TYPE_VENDOR)
-		return AE_OK;
-
-	vendor = (struct acpi_resource_vendor *)&resource->data;
-	descriptor = (struct acpi_vendor_descriptor *)vendor->byte_data;
-	if (vendor->byte_length <= sizeof(*info->descriptor) ||
-	    descriptor->guid_id != info->descriptor->guid_id ||
-	    efi_guidcmp(descriptor->guid, info->descriptor->guid))
-		return AE_OK;
-
-	byte_length = vendor->byte_length - sizeof(struct acpi_vendor_descriptor);
-	info->data = acpi_os_allocate(byte_length);
-	if (!info->data)
-		return AE_NO_MEMORY;
-
-	memcpy(info->data,
-	       vendor->byte_data + sizeof(struct acpi_vendor_descriptor),
-	       byte_length);
-	info->length = byte_length;
-	return AE_CTRL_TERMINATE;
-}
-
-acpi_status
-acpi_find_vendor_resource(acpi_handle obj, struct acpi_vendor_descriptor * id,
-			  u8 ** data, u32 * byte_length)
-{
-	struct acpi_vendor_info info;
-
-	info.descriptor = id;
-	info.data = NULL;
-
-	acpi_walk_resources(obj, METHOD_NAME__CRS, acpi_vendor_resource_match,
-			    &info);
-	if (!info.data)
-		return AE_NOT_FOUND;
-
-	*data = info.data;
-	*byte_length = info.length;
-	return AE_OK;
-}
-
-struct acpi_vendor_descriptor hp_ccsr_descriptor = {
-	.guid_id = 2,
-	.guid =
-	    EFI_GUID(0x69e9adf9, 0x924f, 0xab5f, 0xf6, 0x4a, 0x24, 0xd2, 0x01,
-		     0x37, 0x0e, 0xad)
-};
-
-acpi_status hp_acpi_csr_space(acpi_handle obj, u64 * csr_base, u64 * csr_length)
 {
 	acpi_status status;
-	u8 *data;
+	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-	u32 length;
+	struct acpi_resource *resource;
+	struct acpi_resource_vendor_typed *vendor;
 
-	status =
+	status = acpi_get_vendor_resource(obj, METHOD_NAME__CRS, &hp_ccsr_uuid,
-	    acpi_find_vendor_resource(obj, &hp_ccsr_descriptor, &data, &length);
+		&buffer);
 
-	if (ACPI_FAILURE(status) || length != 16)
+	resource = buffer.pointer;
+	vendor = &resource->data.vendor_typed;
+
+	if (ACPI_FAILURE(status) || vendor->byte_length < 16) {
+		status = AE_NOT_FOUND;
+		goto exit;
+	}
+
+	memcpy(base, vendor->byte_data, sizeof(*base));
+	memcpy(length, vendor->byte_data + 8, sizeof(*length));
+
+  exit:
+	acpi_os_free(buffer.pointer);
+	return status;
+}
+
+struct csr_space {
+	u64	base;
+	u64	length;
+};
+
+static acpi_status find_csr_space(struct acpi_resource *resource, void *data)
+{
+	struct csr_space *space = data;
+	struct acpi_resource_address64 addr;
+	acpi_status status;
+
+	status = acpi_resource_to_address64(resource, &addr);
+	if (ACPI_SUCCESS(status) &&
+	    addr.resource_type == ACPI_MEMORY_RANGE &&
+	    addr.address_length &&
+	    addr.producer_consumer == ACPI_CONSUMER) {
+		space->base = addr.minimum;
+		space->length = addr.address_length;
+		return AE_CTRL_TERMINATE;
+	}
+	return AE_OK;		/* keep looking */
+}
+
+static acpi_status hp_crs_locate(acpi_handle obj, u64 *base, u64 *length)
+{
+	struct csr_space space = { 0, 0 };
+
+	acpi_walk_resources(obj, METHOD_NAME__CRS, find_csr_space, &space);
+	if (!space.length)
 		return AE_NOT_FOUND;
 
-	memcpy(csr_base, data, sizeof(*csr_base));
+	*base = space.base;
-	memcpy(csr_length, data + 8, sizeof(*csr_length));
+	*length = space.length;
-	acpi_os_free(data);
-
 	return AE_OK;
 }
 
+acpi_status hp_acpi_csr_space(acpi_handle obj, u64 *csr_base, u64 *csr_length)
+{
+	acpi_status status;
+
+	status = hp_ccsr_locate(obj, csr_base, csr_length);
+	if (ACPI_SUCCESS(status))
+		return status;
+
+	return hp_crs_locate(obj, csr_base, csr_length);
+}
 EXPORT_SYMBOL(hp_acpi_csr_space);

arch/ia64/kernel/entry.S

@@ -1606,5 +1606,8 @@ sys_call_table:
 	data8 sys_ni_syscall			// 1295 reserved for ppoll
 	data8 sys_unshare
 	data8 sys_splice
+	data8 sys_set_robust_list
+	data8 sys_get_robust_list
+	data8 sys_sync_file_range		// 1300
 
 	.org sys_call_table + 8*NR_syscalls	// guard against failures to increase NR_syscalls

arch/ia64/kernel/mca.c

@@ -581,10 +581,12 @@ ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *regs)
 {
 	unsigned long flags;
 	int cpu = smp_processor_id();
+	struct ia64_mca_notify_die nd =
+		{ .sos = NULL, .monarch_cpu = &monarch_cpu };
 
 	/* Mask all interrupts */
 	local_irq_save(flags);
-	if (notify_die(DIE_MCA_RENDZVOUS_ENTER, "MCA", regs, 0, 0, 0)
+	if (notify_die(DIE_MCA_RENDZVOUS_ENTER, "MCA", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
@@ -594,7 +596,7 @@ ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *regs)
 	 */
 	ia64_sal_mc_rendez();
 
-	if (notify_die(DIE_MCA_RENDZVOUS_PROCESS, "MCA", regs, 0, 0, 0)
+	if (notify_die(DIE_MCA_RENDZVOUS_PROCESS, "MCA", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
@@ -602,7 +604,7 @@ ia64_mca_rendez_int_handler(int rendez_irq, void *arg, struct pt_regs *regs)
 	while (monarch_cpu != -1)
 	       cpu_relax();	/* spin until monarch leaves */
 
-	if (notify_die(DIE_MCA_RENDZVOUS_LEAVE, "MCA", regs, 0, 0, 0)
+	if (notify_die(DIE_MCA_RENDZVOUS_LEAVE, "MCA", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
@@ -1023,6 +1025,8 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 		&sos->proc_state_param;
 	int recover, cpu = smp_processor_id();
 	task_t *previous_current;
+	struct ia64_mca_notify_die nd =
+		{ .sos = sos, .monarch_cpu = &monarch_cpu };
 
 	oops_in_progress = 1;	/* FIXME: make printk NMI/MCA/INIT safe */
 	console_loglevel = 15;	/* make sure printks make it to console */
@@ -1031,7 +1035,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 
 	previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");
 	monarch_cpu = cpu;
-	if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, 0, 0, 0)
+	if (notify_die(DIE_MCA_MONARCH_ENTER, "MCA", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 	ia64_wait_for_slaves(cpu);
@@ -1043,7 +1047,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 	 * spinning in SAL does not work.
 	 */
 	ia64_mca_wakeup_all();
-	if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, 0, 0, 0)
+	if (notify_die(DIE_MCA_MONARCH_PROCESS, "MCA", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
@@ -1064,7 +1068,7 @@ ia64_mca_handler(struct pt_regs *regs, struct switch_stack *sw,
 		ia64_sal_clear_state_info(SAL_INFO_TYPE_MCA);
 		sos->os_status = IA64_MCA_CORRECTED;
 	}
-	if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, 0, 0, recover)
+	if (notify_die(DIE_MCA_MONARCH_LEAVE, "MCA", regs, (long)&nd, 0, recover)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
@@ -1351,10 +1355,14 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
 	static atomic_t monarchs;
 	task_t *previous_current;
 	int cpu = smp_processor_id();
+	struct ia64_mca_notify_die nd =
+		{ .sos = sos, .monarch_cpu = &monarch_cpu };
 
 	oops_in_progress = 1;	/* FIXME: make printk NMI/MCA/INIT safe */
 	console_loglevel = 15;	/* make sure printks make it to console */
 
+	(void) notify_die(DIE_INIT_ENTER, "INIT", regs, (long)&nd, 0, 0);
+
 	printk(KERN_INFO "Entered OS INIT handler. PSP=%lx cpu=%d monarch=%ld\n",
 		sos->proc_state_param, cpu, sos->monarch);
 	salinfo_log_wakeup(SAL_INFO_TYPE_INIT, NULL, 0, 0);
@@ -1390,15 +1398,15 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
 		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, 0, 0, 0)
+		if (notify_die(DIE_INIT_SLAVE_ENTER, "INIT", regs, (long)&nd, 0, 0)
 				== NOTIFY_STOP)
 			ia64_mca_spin(__FUNCTION__);
-		if (notify_die(DIE_INIT_SLAVE_PROCESS, "INIT", regs, 0, 0, 0)
+		if (notify_die(DIE_INIT_SLAVE_PROCESS, "INIT", regs, (long)&nd, 0, 0)
 				== NOTIFY_STOP)
 			ia64_mca_spin(__FUNCTION__);
 		while (monarch_cpu != -1)
 		       cpu_relax();	/* spin until monarch leaves */
-		if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, 0, 0, 0)
+		if (notify_die(DIE_INIT_SLAVE_LEAVE, "INIT", regs, (long)&nd, 0, 0)
 				== NOTIFY_STOP)
 			ia64_mca_spin(__FUNCTION__);
 		printk("Slave on cpu %d returning to normal service.\n", cpu);
@@ -1409,7 +1417,7 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
 	}
 
 	monarch_cpu = cpu;
-	if (notify_die(DIE_INIT_MONARCH_ENTER, "INIT", regs, 0, 0, 0)
+	if (notify_die(DIE_INIT_MONARCH_ENTER, "INIT", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 
@@ -1426,10 +1434,10 @@ ia64_init_handler(struct pt_regs *regs, struct switch_stack *sw,
 	 * to default_monarch_init_process() above and just print all the
 	 * tasks.
 	 */
-	if (notify_die(DIE_INIT_MONARCH_PROCESS, "INIT", regs, 0, 0, 0)
+	if (notify_die(DIE_INIT_MONARCH_PROCESS, "INIT", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
-	if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, 0, 0, 0)
+	if (notify_die(DIE_INIT_MONARCH_LEAVE, "INIT", regs, (long)&nd, 0, 0)
 			== NOTIFY_STOP)
 		ia64_mca_spin(__FUNCTION__);
 	printk("\nINIT dump complete.  Monarch on cpu %d returning to normal service.\n", cpu);
@@ -1631,6 +1639,7 @@ ia64_mca_init(void)
 			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);
 			continue;
 		}
 		printk(KERN_ERR "Failed to register rendezvous interrupt "

arch/ia64/kernel/mca_asm.S

@@ -827,7 +827,7 @@ ia64_state_restore:
 	ld8 r9=[temp2],16	// sal_gp
 	;;
 	ld8 r22=[temp1],16	// pal_min_state, virtual
-	ld8 r21=[temp2],16	// prev_IA64_KR_CURRENT
+	ld8 r13=[temp2],16	// prev_IA64_KR_CURRENT
 	;;
 	ld8 r16=[temp1],16	// prev_IA64_KR_CURRENT_STACK
 	ld8 r20=[temp2],16	// prev_task
@@ -848,7 +848,7 @@ ia64_state_restore:
 	mov cr.iim=temp3
 	mov cr.iha=temp4
 	dep r22=0,r22,62,1	// pal_min_state, physical, uncached
-	mov IA64_KR(CURRENT)=r21
+	mov IA64_KR(CURRENT)=r13
 	ld8 r8=[temp1]		// os_status
 	ld8 r10=[temp2]		// context
 
@@ -856,7 +856,7 @@ ia64_state_restore:
 	 * avoid any dependencies on the algorithm in ia64_switch_to(), just
 	 * purge any existing CURRENT_STACK mapping and insert the new one.
 	 *
-	 * r16 contains prev_IA64_KR_CURRENT_STACK, r21 contains
+	 * r16 contains prev_IA64_KR_CURRENT_STACK, r13 contains
 	 * prev_IA64_KR_CURRENT, these values may have been changed by the C
 	 * code.  Do not use r8, r9, r10, r22, they contain values ready for
 	 * the return to SAL.
@@ -873,7 +873,7 @@ ia64_state_restore:
 	;;
 	srlz.d
 
-	extr.u r19=r21,61,3			// r21 = prev_IA64_KR_CURRENT
+	extr.u r19=r13,61,3			// r13 = prev_IA64_KR_CURRENT
 	shl r20=r16,IA64_GRANULE_SHIFT		// r16 = prev_IA64_KR_CURRENT_STACK
 	movl r21=PAGE_KERNEL			// page properties
 	;;
@@ -883,7 +883,7 @@ ia64_state_restore:
 (p6)	br.spnt 1f				// the dreaded cpu 0 idle task in region 5:(
 	;;
 	mov cr.itir=r18
-	mov cr.ifa=r21
+	mov cr.ifa=r13
 	mov r20=IA64_TR_CURRENT_STACK
 	;;
 	itr.d dtr[r20]=r21

arch/ia64/kernel/module.c

@@ -947,7 +947,7 @@ void
 percpu_modcopy (void *pcpudst, const void *src, unsigned long size)
 {
 	unsigned int i;
-	for_each_cpu(i) {
+	for_each_possible_cpu(i) {
 		memcpy(pcpudst + __per_cpu_offset[i], src, size);
 	}
 }

arch/ia64/mm/fault.c

@@ -60,6 +60,9 @@ ia64_do_page_fault (unsigned long address, unsigned long isr, struct pt_regs *re
 	struct siginfo si;
 	unsigned long mask;
 
+	/* mmap_sem is performance critical.... */
+	prefetchw(&mm->mmap_sem);
+
 	/*
 	 * If we're in an interrupt or have no user context, we must not take the fault..
 	 */

arch/ia64/sn/kernel/xpc_channel.c

@@ -1831,7 +1831,7 @@ xpc_initiate_allocate(partid_t partid, int ch_number, u32 flags, void **payload)
 {
 	struct xpc_partition *part = &xpc_partitions[partid];
 	enum xpc_retval ret = xpcUnknownReason;
-	struct xpc_msg *msg;
+	struct xpc_msg *msg = NULL;
 
 
 	DBUG_ON(partid <= 0 || partid >= XP_MAX_PARTITIONS);

include/asm-ia64/acpi-ext.h

@@ -1,12 +1,15 @@
 /*
- * ia64/platform/hp/common/hp_acpi.h
+ * (c) Copyright 2003, 2006 Hewlett-Packard Development Company, L.P.
+ *	Alex Williamson <alex.williamson@hp.com>
+ *	Bjorn Helgaas <bjorn.helgaas@hp.com>
  *
- * Copyright (C) 2003 Hewlett-Packard
+ * This program is free software; you can redistribute it and/or modify
- * Copyright (C) Alex Williamson
+ * it under the terms of the GNU General Public License version 2 as
- * Copyright (C) Bjorn Helgaas
+ * published by the Free Software Foundation.
  *
  * Vendor specific extensions to ACPI.
  */
+
 #ifndef _ASM_IA64_ACPI_EXT_H
 #define _ASM_IA64_ACPI_EXT_H
 

include/asm-ia64/kdebug.h

@@ -58,6 +58,8 @@ enum die_val {
 	DIE_MCA_RENDZVOUS_ENTER,
 	DIE_MCA_RENDZVOUS_PROCESS,
 	DIE_MCA_RENDZVOUS_LEAVE,
+	DIE_MCA_NEW_TIMEOUT,
+	DIE_INIT_ENTER,
 	DIE_INIT_MONARCH_ENTER,
 	DIE_INIT_MONARCH_PROCESS,
 	DIE_INIT_MONARCH_LEAVE,

include/asm-ia64/mca.h

@@ -148,6 +148,11 @@ extern int  ia64_reg_MCA_extension(int (*fn)(void *, struct ia64_sal_os_state *)
 extern void ia64_unreg_MCA_extension(void);
 extern u64 ia64_get_rnat(u64 *);
 
+struct ia64_mca_notify_die {
+	struct ia64_sal_os_state *sos;
+	int *monarch_cpu;
+};
+
 #else	/* __ASSEMBLY__ */
 
 #define IA64_MCA_CORRECTED	0x0	/* Error has been corrected by OS_MCA */

include/asm-ia64/mutex.h

@@ -84,7 +84,7 @@ __mutex_fastpath_unlock(atomic_t *count, void (*fail_fn)(atomic_t *))
 static inline int
 __mutex_fastpath_trylock(atomic_t *count, int (*fail_fn)(atomic_t *))
 {
-	if (likely(cmpxchg_acq(count, 1, 0)) == 1)
+	if (cmpxchg_acq(count, 1, 0) == 1)
 		return 1;
 	return 0;
 }

include/asm-ia64/unistd.h

@@ -286,12 +286,15 @@
 /* 1294, 1295 reserved for pselect/ppoll */
 #define __NR_unshare			1296
 #define __NR_splice			1297
+#define __NR_set_robust_list		1298
+#define __NR_get_robust_list		1299
+#define __NR_sync_file_range		1300
 
 #ifdef __KERNEL__
 
 #include <linux/config.h>
 
-#define NR_syscalls			274 /* length of syscall table */
+#define NR_syscalls			277 /* length of syscall table */
 
 #define __ARCH_WANT_SYS_RT_SIGACTION
 

include/asm-ia64/vga.h

@@ -17,7 +17,7 @@
 extern unsigned long vga_console_iobase;
 extern unsigned long vga_console_membase;
 
-#define VGA_MAP_MEM(x)	((unsigned long) ioremap(vga_console_membase + (x), 0))
+#define VGA_MAP_MEM(x)	((unsigned long) ioremap_nocache(vga_console_membase + (x), 0))
 
 #define vga_readb(x)	(*(x))
 #define vga_writeb(x,y)	(*(y) = (x))