From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 7 Apr 2009 14:59:41 +0000 (-0700)
Subject: branch tracer, intel-iommu: fix build with CONFIG_BRANCH_TRACER=y
X-Git-Tag: v2.6.30-rc1~2^2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ab3c9c686e22ab264269337ce7b75d9760211198;p=karo-tx-linux.git

branch tracer, intel-iommu: fix build with CONFIG_BRANCH_TRACER=y

Fix the branch tracer barfing on comma statements within if ()
statements.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 8872ad6dd89b..37bcb50a4d7c 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -115,7 +115,9 @@ void ftrace_likely_update(struct ftrace_branch_data *f, int val, int expect);
  * "Define 'is'", Bill Clinton
  * "Define 'if'", Steven Rostedt
  */
-#define if(cond) if (__builtin_constant_p((cond)) ? !!(cond) :		\
+#define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) )
+#define __trace_if(cond) \
+	if (__builtin_constant_p((cond)) ? !!(cond) :			\
 	({								\
 		int ______r;						\
 		static struct ftrace_branch_data			\