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>

1 files changed, 3 insertions, 1 deletions

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                        \