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| author | Michael Ellerman <michael@ellerman.id.au> | 2012-04-11 11:54:13 +1000 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-26 13:51:31 +0200 |
| commit | 724b6daa13e100067c30cfc4d1ad06629609dc4e (patch) | |
| tree | 290b86e3c259922c350ea6469f43ddb953a83aa3 /kernel/events | |
| parent | c716ef56f1319e8a515cb1947a3ec59b06e94a5e (diff) | |
| download | talos-obmc-linux-724b6daa13e100067c30cfc4d1ad06629609dc4e.tar.gz talos-obmc-linux-724b6daa13e100067c30cfc4d1ad06629609dc4e.zip | |
perf: Fix perf_event_for_each() to use sibling
In perf_event_for_each() we call a function on an event, and then
iterate over the siblings of the event.
However we don't call the function on the siblings, we call it
repeatedly on the original event - it seems "obvious" that we should
be calling it with sibling as the argument.
It looks like this broke in commit 75f937f24bd9 ("Fix ctx->mutex
vs counter->mutex inversion").
The only effect of the bug is that the PERF_IOC_FLAG_GROUP parameter
to the ioctls doesn't work.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1334109253-31329-1-git-send-email-michael@ellerman.id.au
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index a6a9ec4cd8f5..fd126f82b57c 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -3183,7 +3183,7 @@ static void perf_event_for_each(struct perf_event *event, perf_event_for_each_child(event, func); func(event); list_for_each_entry(sibling, &event->sibling_list, group_entry) - perf_event_for_each_child(event, func); + perf_event_for_each_child(sibling, func); mutex_unlock(&ctx->mutex); } |
