diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 32b5d043203afe91fe977d8fd50d5d0064792057..5e9cd400ecb4ff71a4ddcc87d9b53168f5a9f380 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -2351,7 +2351,10 @@ __register_event(struct trace_event_call *call, struct module *mod)
 	if (ret < 0)
 		return ret;
 
+	down_write(&trace_event_sem);
 	list_add(&call->list, &ftrace_events);
+	up_write(&trace_event_sem);
+
 	call->mod = mod;
 
 	return 0;
@@ -2737,6 +2740,8 @@ __trace_add_event_dirs(struct trace_array *tr)
 	struct trace_event_call *call;
 	int ret;
 
+	lockdep_assert_held(&trace_event_sem);
+
 	list_for_each_entry(call, &ftrace_events, list) {
 		ret = __trace_add_new_event(call, tr);
 		if (ret < 0)