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| author | Ingo Molnar <mingo@kernel.org> | 2012-06-18 11:47:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-18 11:47:58 +0200 |
| commit | d1ece0998eeb7b6543044f32b7d9bcbaf6dc294a (patch) | |
| tree | bcbb3dddee8b5db83f07585370b1bd57f92296ac /kernel/events | |
| parent | 76958a61e42fb6277a8431eb17e4bdb24176f1b7 (diff) | |
| parent | 9c5da09d266ca9b32eb16cf940f8161d949c2fe5 (diff) | |
| download | lwn-d1ece0998eeb7b6543044f32b7d9bcbaf6dc294a.tar.gz lwn-d1ece0998eeb7b6543044f32b7d9bcbaf6dc294a.zip | |
Merge branch 'perf/urgent' into perf/core
Merge in all fixes before applying more changes.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
| -rw-r--r-- | kernel/events/core.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index f85c0154b333..d7d71d6ec972 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -253,9 +253,9 @@ perf_cgroup_match(struct perf_event *event) return !event->cgrp || event->cgrp == cpuctx->cgrp; } -static inline void perf_get_cgroup(struct perf_event *event) +static inline bool perf_tryget_cgroup(struct perf_event *event) { - css_get(&event->cgrp->css); + return css_tryget(&event->cgrp->css); } static inline void perf_put_cgroup(struct perf_event *event) @@ -484,7 +484,11 @@ static inline int perf_cgroup_connect(int fd, struct perf_event *event, event->cgrp = cgrp; /* must be done before we fput() the file */ - perf_get_cgroup(event); + if (!perf_tryget_cgroup(event)) { + event->cgrp = NULL; + ret = -ENOENT; + goto out; + } /* * all events in a group must monitor |