Subject: display last accessed sysfs file on kernel panic message
From: Andrew Morton <akpm@osdl.org>
Patch-mainline: never

Display the most-recently-opened sysfs file's name when oopsing.

From: Adrian Bunk <bunk@stusta.de>

  Build fix

From: Greg Kroah-Hartman <gregkh@suse.de>

  Modified to make the api call cleaner, and available to all arches if
  need be.  Also added it to x86-64's crash dump message.


Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Automatically created from "patches.drivers/sysfs-crash-debugging.patch" by xen-port-patches.py

Index: head-2008-02-26/arch/x86/kernel/traps_32-xen.c
===================================================================
--- head-2008-02-26.orig/arch/x86/kernel/traps_32-xen.c	2008-02-27 17:27:13.000000000 +0100
+++ head-2008-02-26/arch/x86/kernel/traps_32-xen.c	2008-03-03 14:41:20.000000000 +0100
@@ -402,6 +402,7 @@ int __kprobes __die(const char * str, st
 #endif
 	printk("\n");
 
+	sysfs_printk_last_file();
 	if (notify_die(DIE_OOPS, str, regs, err,
 				current->thread.trap_no, SIGSEGV) !=
 			NOTIFY_STOP) {
Index: head-2008-02-26/arch/x86/kernel/traps_64-xen.c
===================================================================
--- head-2008-02-26.orig/arch/x86/kernel/traps_64-xen.c	2008-02-27 10:01:23.000000000 +0100
+++ head-2008-02-26/arch/x86/kernel/traps_64-xen.c	2008-03-03 14:41:47.000000000 +0100
@@ -575,6 +575,7 @@ int __kprobes __die(const char * str, st
 	printk("DEBUG_PAGEALLOC");
 #endif
 	printk("\n");
+	sysfs_printk_last_file();
 	if (notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV) == NOTIFY_STOP)
 		return 1;
 	show_registers(regs);