4581 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
4604 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
4606 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
4625 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
4630 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
4660 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
4676 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
4761 	mutex_lock(&leader->child_mutex);  in perf_read_group()
4773 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
4781 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
4815 	mutex_lock(&event->child_mutex);  in is_event_hup()
4817 	mutex_unlock(&event->child_mutex);  in is_event_hup()
4907 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
4911 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
9940 	mutex_init(&event->child_mutex);  in perf_event_alloc()
11029 	mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
11031 	mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
11147 	mutex_lock(&parent->child_mutex);  in perf_free_event()
11149 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
11295 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
11298 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
11348 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()