linux-kernel - [PATCH 1/3] perf: Remove duplicate invocation on perf_event_for

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Date:	Thu, 31 May 2012 14:51:44 +0900
From:	Namhyung Kim <namhyung.kim@....com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3] perf: Remove duplicate invocation on perf_event_for_each

The @func callback was invoked twice for group leader
when perf_event_for_each() called. It seems the commit
75f937f24bd9 ("perf_counter: Fix ctx->mutex vs counter
->mutex inversion") made the mistake during the change.

Signed-off-by: Namhyung Kim <namhyung.kim@....com>
---
 kernel/events/core.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5b06cbbf6931..f85c0154b333 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3181,7 +3181,6 @@ static void perf_event_for_each(struct perf_event *event,
 	event = event->group_leader;
 
 	perf_event_for_each_child(event, func);
-	func(event);
 	list_for_each_entry(sibling, &event->sibling_list, group_entry)
 		perf_event_for_each_child(sibling, func);
 	mutex_unlock(&ctx->mutex);
-- 
1.7.10.2

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