x86, tracing: add notrace to asm-x86/linkage.h
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>
diff --git a/include/asm-x86/linkage.h b/include/asm-x86/linkage.h
index c048353..64e444f 100644
--- a/include/asm-x86/linkage.h
+++ b/include/asm-x86/linkage.h
@@ -1,6 +1,9 @@
#ifndef __ASM_LINKAGE_H
#define __ASM_LINKAGE_H
+#undef notrace
+#define notrace __attribute__((no_instrument_function))
+
#ifdef CONFIG_X86_64
#define __ALIGN .p2align 4,,15
#define __ALIGN_STR ".p2align 4,,15"