2199 	lockdep_assert_held(&parent_event->child_mutex);  in perf_child_detach()
3181 	mutex_lock(&event->child_mutex);  in perf_event_modify_attr()
3198 	mutex_unlock(&event->child_mutex);  in perf_event_modify_attr()
5319 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5342 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5344 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
5363 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5368 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
5407 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
5423 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
5536 	mutex_lock(&leader->child_mutex);  in perf_read_group()
5548 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5556 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
5592 	mutex_lock(&event->child_mutex);  in is_event_hup()
5594 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5706 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5710 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
11854 	mutex_init(&event->child_mutex);  in perf_event_alloc()
12991 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
13005 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
13125 	mutex_lock(&parent->child_mutex);  in perf_free_event()
13127 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
13277 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
13280 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
13331 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()