3862 		mutex_lock(&parent_event->child_mutex);  in orphans_remove_work()
3864 		mutex_unlock(&parent_event->child_mutex);  in orphans_remove_work()
3886 	mutex_lock(&event->child_mutex);  in perf_event_read_value()
3902 	mutex_unlock(&event->child_mutex);  in perf_event_read_value()
3970 	mutex_lock(&leader->child_mutex);  in perf_read_group()
3982 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
3990 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
4024 	mutex_lock(&event->child_mutex);  in is_event_hup()
4026 	mutex_unlock(&event->child_mutex);  in is_event_hup()
4116 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
4120 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
7874 	mutex_init(&event->child_mutex);  in perf_event_alloc()
8770 	mutex_lock(&parent_event->child_mutex);  in sync_child_event()
8772 	mutex_unlock(&parent_event->child_mutex);  in sync_child_event()
8932 	mutex_lock(&parent->child_mutex);  in perf_free_event()
8934 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
9098 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
9100 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()