diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_event_perf.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index 49c7abf2ba5..e6f65887842 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -132,8 +132,9 @@ void perf_trace_destroy(struct perf_event *p_event) struct ftrace_event_call *tp_event = p_event->tp_event; int i; + mutex_lock(&event_mutex); if (--tp_event->perf_refcount > 0) - return; + goto out; if (tp_event->class->reg) tp_event->class->reg(tp_event, TRACE_REG_PERF_UNREGISTER); @@ -157,6 +158,8 @@ void perf_trace_destroy(struct perf_event *p_event) perf_trace_buf[i] = NULL; } } +out: + mutex_unlock(&event_mutex); } __kprobes void *perf_trace_buf_prepare(int size, unsigned short type, |