[06/19] tracing: add notrace to linkage.h

[Ingo Molnar]

From: Ingo Molnar <mingo@xxxxxxx>

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@xxxxxxx>
---
 include/linux/linkage.h |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/include/linux/linkage.h
===================================================================
--- linux.orig/include/linux/linkage.h
+++ linux/include/linux/linkage.h
@@ -3,6 +3,8 @@
 
 #include <asm/linkage.h>
 
+#define notrace __attribute__((no_instrument_function))
+
 #ifdef __cplusplus
 #define CPP_ASMLINKAGE extern "C"
 #else
--
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