linux-kernel - [PATCH 1/2] tracing/events: put TP_fast

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Date:	Mon, 01 Jun 2009 15:35:13 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, Christoph Hellwig <hch@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] tracing/events: put TP_fast_assign into braces

Currently TP_fast_assin has a limitation that we can't define local
variables in it.

Here's one use case when we introduce __dynamic_array():

TP_fast_assign(
	type *p = __get_dynamic_array(item);

	foo(p);
	bar(p);
),

[ Impact: allow defining local variables in TP_fast_assign ]

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 include/trace/ftrace.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 9276ec4..ee92682 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -471,7 +471,7 @@ static void ftrace_raw_event_##call(proto)				\
 		return;							\
 	entry	= ring_buffer_event_data(event);			\
 									\
-	assign;								\
+	{ assign; }							\
 									\
 	if (!filter_current_check_discard(event_call, entry, event))	\
 		trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
-- 
1.5.4.rc3


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