2218 	lockdep_assert_held(&parent_event->child_mutex);  in perf_child_detach()
3217 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3227 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
5125 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5148 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5150 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5169 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5174 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5213 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5229 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5314 	mutex_lock(&leader->child_mutex);  in perf_read_group()
5326 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5334 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5368 	mutex_lock(&event->child_mutex);  in is_event_hup()
5370 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5482 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5486 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
11475 	mutex_init(&event->child_mutex);  in perf_event_alloc()
12632 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
12646 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
12768 	mutex_lock(&parent->child_mutex);  in perf_free_event()
12770 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
12929 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
12932 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
12983 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()