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| author | Li Zefan <lizf@cn.fujitsu.com> | 2010-09-01 12:58:43 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-09-09 20:38:51 +0200 |
| commit | 9cb627d5f38830ca19aa0dca52d1d3a633018bf7 (patch) | |
| tree | 38138b59d5b54c09314a01172586aa653cc3b528 /kernel | |
| parent | da34634fd39958725310d2c30c9b4543945f968b (diff) | |
| download | lwn-9cb627d5f38830ca19aa0dca52d1d3a633018bf7.tar.gz lwn-9cb627d5f38830ca19aa0dca52d1d3a633018bf7.zip | |
perf, trace: Fix module leak
Commit 1c024eca (perf, trace: Optimize tracepoints by using
per-tracepoint-per-cpu hlist to track events) caused a module
refcount leak.
Reported-And-Tested-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <4C7E1F12.8030304@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_event_perf.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index 000e6e85b445..31cc4cb0dbf2 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -91,6 +91,8 @@ int perf_trace_init(struct perf_event *p_event) tp_event->class && tp_event->class->reg && try_module_get(tp_event->mod)) { ret = perf_trace_event_init(tp_event, p_event); + if (ret) + module_put(tp_event->mod); break; } } @@ -146,6 +148,7 @@ void perf_trace_destroy(struct perf_event *p_event) } } out: + module_put(tp_event->mod); mutex_unlock(&event_mutex); } |