2189 	struct perf_event *parent_event = event->parent;  in perf_child_detach()  local
2196 	if (WARN_ON_ONCE(!parent_event))  in perf_child_detach()
2199 	lockdep_assert_held(&parent_event->child_mutex);  in perf_child_detach()
11822 		 struct perf_event *parent_event,  in perf_event_alloc()  argument
11881 	event->parent		= parent_event;  in perf_event_alloc()
11888 	if (parent_event)  in perf_event_alloc()
11889 		event->event_caps = parent_event->event_caps;  in perf_event_alloc()
11902 	if (parent_event)  in perf_event_alloc()
11903 		event->clock = parent_event->clock;  in perf_event_alloc()
11905 	if (!overflow_handler && parent_event) {  in perf_event_alloc()
11906 		overflow_handler = parent_event->overflow_handler;  in perf_event_alloc()
11907 		context = parent_event->overflow_handler_context;  in perf_event_alloc()
11910 			struct bpf_prog *prog = parent_event->prog;  in perf_event_alloc()
11915 				parent_event->orig_overflow_handler;  in perf_event_alloc()
12949 	struct perf_event *parent_event = child_event->parent;  in sync_child_event()  local
12964 	atomic64_add(child_val, &parent_event->child_count);  in sync_child_event()
12966 		     &parent_event->child_total_time_enabled);  in sync_child_event()
12968 		     &parent_event->child_total_time_running);  in sync_child_event()
12974 	struct perf_event *parent_event = event->parent;  in perf_event_exit_event()  local
12977 	if (parent_event) {  in perf_event_exit_event()
12991 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
13004 	if (parent_event) {  in perf_event_exit_event()
13005 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
13009 		perf_event_wakeup(parent_event);  in perf_event_exit_event()
13011 		put_event(parent_event);  in perf_event_exit_event()
13235 inherit_event(struct perf_event *parent_event,  in inherit_event()  argument
13242 	enum perf_event_state parent_state = parent_event->state;  in inherit_event()
13253 	if (parent_event->parent)  in inherit_event()
13254 		parent_event = parent_event->parent;  in inherit_event()
13256 	child_event = perf_event_alloc(&parent_event->attr,  in inherit_event()
13257 					   parent_event->cpu,  in inherit_event()
13259 					   group_leader, parent_event,  in inherit_event()
13277 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
13278 	if (is_orphaned_event(parent_event) ||  in inherit_event()
13279 	    !atomic_long_inc_not_zero(&parent_event->refcount)) {  in inherit_event()
13280 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
13298 	if (parent_event->attr.freq) {  in inherit_event()
13299 		u64 sample_period = parent_event->hw.sample_period;  in inherit_event()
13309 	child_event->overflow_handler = parent_event->overflow_handler;  in inherit_event()
13311 		= parent_event->overflow_handler_context;  in inherit_event()
13330 	list_add_tail(&child_event->child_list, &parent_event->child_list);  in inherit_event()
13331 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()
13346 static int inherit_group(struct perf_event *parent_event,  in inherit_group()  argument
13356 	leader = inherit_event(parent_event, parent, parent_ctx,  in inherit_group()
13365 	for_each_sibling_event(sub, parent_event) {  in inherit_group()
13371 		if (sub->aux_event == parent_event && child_ctr &&  in inherit_group()
13376 		leader->group_generation = parent_event->group_generation;  in inherit_group()