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Subject[PATCH 2/2] tracing: wrap arguments with PARAMS
From: Steven Rostedt <srostedt@redhat.com>

Peter Zijlstra warned that TPPROTO and TPARGS might become something
other than a simple copy of itself. To prevent this from having
side effects in the TRACE_FORMAT macro in tracepoint.h, we add a
PARAMS() macro to be defined as just a wrapper.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
---
include/linux/tracepoint.h | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 3de09fa..62d1339 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -153,7 +153,8 @@ static inline void tracepoint_synchronize_unregister(void)
synchronize_sched();
}

+#define PARAMS(args...) args
#define TRACE_FORMAT(name, proto, args, fmt) \
- DECLARE_TRACE(name, TPPROTO(proto), TPARGS(args))
+ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))

#endif
--
1.5.6.5
--


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