1 files changed, 1 insertions, 0 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 7736fe8c1b76..777c6c3a0cde 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -825,6 +825,7 @@ static int filter_pred_##size(struct filter_pred *pred, void *event,	\
         return match;                                                   \
 }
 
+extern struct mutex event_mutex;
 extern struct list_head ftrace_events;
 
 extern const char *__start___trace_bprintk_fmt[];