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    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@cn.fujitsu.com>
    AuthorDate: Thu, 10 Dec 2009 14:00:51 +0800
    Committer: Ingo Molnar <mingo@elte.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@cn.fujitsu.com>
    Acked-by: Peter Zijlstra <peterz@infradead.org>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Paul Mackerras <paulus@samba.org>
    LKML-Reference: <4B208E93.1010801@cn.fujitsu.com>
    Signed-off-by: Ingo Molnar <mingo@elte.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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