From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 15 Jan 2012 19:26:35 +0000 (-0800)
Subject: Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git... 
X-Git-Tag: v3.3-rc1~51
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=83c2f912b43c3a7babbb6cb7ae2a5276c1ed2a3e;p=profile%2Fivi%2Fkernel-x86-ivi.git

Merge branch 'perf-core-for-linus' of git://git./linux/kernel/git/tip/tip

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
  perf tools: Fix compile error on x86_64 Ubuntu
  perf report: Fix --stdio output alignment when --showcpuutilization used
  perf annotate: Get rid of field_sep check
  perf annotate: Fix usage string
  perf kmem: Fix a memory leak
  perf kmem: Add missing closedir() calls
  perf top: Add error message for EMFILE
  perf test: Change type of '-v' option to INCR
  perf script: Add missing closedir() calls
  tracing: Fix compile error when static ftrace is enabled
  recordmcount: Fix handling of elf64 big-endian objects.
  perf tools: Add const.h to MANIFEST to make perf-tar-src-pkg work again
  perf tools: Add support for guest/host-only profiling
  perf kvm: Do guest-only counting by default
  perf top: Don't update total_period on process_sample
  perf hists: Stop using 'self' for struct hist_entry
  perf hists: Rename total_session to total_period
  x86: Add counter when debug stack is used with interrupts enabled
  x86: Allow NMIs to hit breakpoints in i386
  x86: Keep current stack in NMI breakpoints
  ...
---

83c2f912b43c3a7babbb6cb7ae2a5276c1ed2a3e
diff --cc arch/x86/kernel/traps.c
index fa1191f,0072b38..482ec3a
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@@ -310,7 -310,17 +310,12 @@@ dotraplinkage void __kprobes do_int3(st
  	if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
  			== NOTIFY_STOP)
  		return;
 -#else
 -	if (notify_die(DIE_TRAP, "int3", regs, error_code, 3, SIGTRAP)
 -			== NOTIFY_STOP)
 -		return;
 -#endif
  
+ 	/*
+ 	 * Let others (NMI) know that the debug stack is in use
+ 	 * as we may switch to the interrupt stack.
+ 	 */
+ 	debug_stack_usage_inc();
  	preempt_conditional_sti(regs);
  	do_trap(3, SIGTRAP, "int3", regs, error_code, NULL);
  	preempt_conditional_cli(regs);