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authorFrederic Weisbecker <fweisbec@gmail.com>2010-05-20 07:47:21 +0200
committerFrederic Weisbecker <fweisbec@gmail.com>2010-06-08 23:31:27 +0200
commitb0f82b81fe6bbcf78d478071f33e44554726bc81 (patch)
tree6305c095b927f956a791b9dce687cb94a21718e6 /arch/x86/include/asm/stacktrace.h
parentc9cf4dbb4d9ca715d8fedf13301a53296429abc6 (diff)
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perf: Drop the skip argument from perf_arch_fetch_regs_caller
Drop this argument now that we always want to rewind only to the state of the first caller. It means frame pointers are not necessary anymore to reliably get the source of an event. But this also means we need this helper to be a macro now, as an inline function is not an option since we need to know when to provide a default implentation. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: David Miller <davem@davemloft.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/stacktrace.h')
-rw-r--r--arch/x86/include/asm/stacktrace.h7
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index a957463d3c7..2b16a2ad23d 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -78,17 +78,14 @@ struct stack_frame_ia32 {
u32 return_address;
};
-static inline unsigned long rewind_frame_pointer(int n)
+static inline unsigned long caller_frame_pointer(void)
{
struct stack_frame *frame;
get_bp(frame);
#ifdef CONFIG_FRAME_POINTER
- while (n--) {
- if (probe_kernel_address(&frame->next_frame, frame))
- break;
- }
+ frame = frame->next_frame;
#endif
return (unsigned long)frame;