From: Ingo Molnar <mingo@elte.hu>
Date: Thu, 17 Apr 2008 15:40:51 +0000 (+0200)
Subject: x86, tracing: add notrace to asm-x86/linkage.h
X-Git-Tag: firefly_0821_release~21631^2~507
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=78a9909aab54123c7c471022389b36972e13b48e;p=firefly-linux-kernel-4.4.55.git

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 c048353f4b85..64e444f8e85b 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"