linux-kernel - [tip:perf/urgent] perf_event: Fix perf_swevent

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Message-ID: <tip-21140f4d3387aa2213f1deea0128df1dbf924379@git.kernel.org>
Date:	Thu, 10 Dec 2009 06:18:33 GMT
From:	tip-bot for Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, hpa@...or.com,
	mingo@...hat.com, peterz@...radead.org,
	xiaoguangrong@...fujitsu.com, fweisbec@...il.com,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/urgent] perf_event: Fix perf_swevent_hrtimer() variable initialization

Commit-ID:  21140f4d3387aa2213f1deea0128df1dbf924379
Gitweb:     http://git.kernel.org/tip/21140f4d3387aa2213f1deea0128df1dbf924379
Author:     Xiao Guangrong <xiaoguangrong@...fujitsu.com>
AuthorDate: Thu, 10 Dec 2009 14:00:51 +0800
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 10 Dec 2009 07:11:05 +0100

perf_event: Fix perf_swevent_hrtimer() variable initialization

fix:

 [<c0477471>] ? printk+0x1d/0x24
 [<c01c98f9>] ? perf_prepare_sample+0x269/0x280
 [<c0149231>] warn_slowpath_common+0x71/0xd0
 [<c01c98f9>] ? perf_prepare_sample+0x269/0x280
 [<c01492aa>] warn_slowpath_null+0x1a/0x20
 [<c01c98f9>] perf_prepare_sample+0x269/0x280
 [<c016e9f3>] ? cpu_clock+0x53/0x90
 [<c01cc368>] __perf_event_overflow+0x2a8/0x300
 [<c01ccc3b>] perf_event_overflow+0x1b/0x30
 [<c01ccccf>] perf_swevent_hrtimer+0x7f/0x120

This is because 'data.raw' variable not initialize.

Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Acked-by: Peter Zijlstra <peterz@...radead.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Paul Mackerras <paulus@...ba.org>
LKML-Reference: <4B208E93.1010801@...fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/perf_event.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 94e1b28..3a5d6c4 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4010,6 +4010,7 @@ static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer)
 	event->pmu->read(event);
 
 	data.addr = 0;
+	data.raw = NULL;
 	data.period = event->hw.last_period;
 	regs = get_irq_regs();
 	/*
--
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