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tracing: add notrace to linkage.h

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notrace signals that a function should not be traced. Most of the
time this is used by tracers to annotate code that cannot be
traced - it's in a volatile state (such as in user vdso context
or NMI context) or it's in the tracer internals.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-05-12 21:20:41 +02:00
committed by Thomas Gleixner
parent 502825282e
commit ffdc1a09ae
1 changed files with 2 additions and 0 deletions
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include/linux/linkage.h
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@@ -3,6 +3,8 @@
#include <asm/linkage.h> #include <asm/linkage.h>
#define notrace __attribute__((no_instrument_function))
#ifdef __cplusplus #ifdef __cplusplus
#define CPP_ASMLINKAGE extern "C" #define CPP_ASMLINKAGE extern "C"
#else #else