2328 	lockdep_assert_held(&parent_event->child_mutex);  in perf_child_detach()
3336 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3353 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
5726 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5750 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5752 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5768 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5783 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5827 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5843 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5956 	mutex_lock(&leader->child_mutex);  in perf_read_group()
5968 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5976 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
6012 	mutex_lock(&event->child_mutex);  in is_event_hup()
6014 	mutex_unlock(&event->child_mutex);  in is_event_hup()
6130 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
6134 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
12572 	mutex_init(&event->child_mutex);  in perf_event_alloc()
13711 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
13720 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
13845 	mutex_lock(&parent->child_mutex);  in perf_free_event()
13847 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
14007 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
14010 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
14057 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()