2198 	lockdep_assert_held(&parent_event->child_mutex);  in perf_child_detach()
3178 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3195 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
5105 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5128 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5130 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5149 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5154 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5193 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5209 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5294 	mutex_lock(&leader->child_mutex);  in perf_read_group()
5306 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5314 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5348 	mutex_lock(&event->child_mutex);  in is_event_hup()
5350 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5462 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5466 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
11498 	mutex_init(&event->child_mutex);  in perf_event_alloc()
12689 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
12703 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
12825 	mutex_lock(&parent->child_mutex);  in perf_free_event()
12827 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
12986 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
12989 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
13040 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()