4710 	mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
4733 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
4735 		mutex_lock(&event->child_mutex);  in perf_event_release_kernel()
4754 		mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
4759 	mutex_unlock(&event->child_mutex);  in perf_event_release_kernel()
4798 	mutex_lock(&event->child_mutex);  in __perf_event_read_value()
4814 	mutex_unlock(&event->child_mutex);  in __perf_event_read_value()
4899 	mutex_lock(&leader->child_mutex);  in perf_read_group()
4911 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
4919 	mutex_unlock(&leader->child_mutex);  in perf_read_group()
4953 	mutex_lock(&event->child_mutex);  in is_event_hup()
4955 	mutex_unlock(&event->child_mutex);  in is_event_hup()
5045 	mutex_lock(&event->child_mutex);  in perf_event_for_each_child()
5049 	mutex_unlock(&event->child_mutex);  in perf_event_for_each_child()
10427 	mutex_init(&event->child_mutex);  in perf_event_alloc()
11535 	mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
11537 	mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
11653 	mutex_lock(&parent->child_mutex);  in perf_free_event()
11655 	mutex_unlock(&parent->child_mutex);  in perf_free_event()
11815 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
11818 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
11868 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()