2415 	struct perf_event *parent_event = event->parent;  in perf_child_detach()  local
2422 	if (WARN_ON_ONCE(!parent_event))  in perf_child_detach()
13270 		 struct perf_event *parent_event,  in perf_event_alloc()  argument
13330 	event->parent		= parent_event;  in perf_event_alloc()
13337 	if (parent_event)  in perf_event_alloc()
13338 		event->event_caps = parent_event->event_caps;  in perf_event_alloc()
13351 	if (parent_event)  in perf_event_alloc()
13352 		event->clock = parent_event->clock;  in perf_event_alloc()
13354 	if (!overflow_handler && parent_event) {  in perf_event_alloc()
13355 		overflow_handler = parent_event->overflow_handler;  in perf_event_alloc()
13356 		context = parent_event->overflow_handler_context;  in perf_event_alloc()
13358 		if (parent_event->prog) {  in perf_event_alloc()
13359 			struct bpf_prog *prog = parent_event->prog;  in perf_event_alloc()
14428 	struct perf_event *parent_event = child_event->parent;  in sync_child_event()  local
14441 	atomic64_add(child_val, &parent_event->child_count);  in sync_child_event()
14443 		     &parent_event->child_total_time_enabled);  in sync_child_event()
14445 		     &parent_event->child_total_time_running);  in sync_child_event()
14454 	struct perf_event *parent_event = event->parent;  in perf_event_exit_event()  local
14458 	if (parent_event) {  in perf_event_exit_event()
14472 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
14487 	if (parent_event) {  in perf_event_exit_event()
14488 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
14498 			perf_event_wakeup(parent_event);  in perf_event_exit_event()
14704 inherit_event(struct perf_event *parent_event,  in inherit_event()  argument
14711 	enum perf_event_state parent_state = parent_event->state;  in inherit_event()
14722 	if (parent_event->parent)  in inherit_event()
14723 		parent_event = parent_event->parent;  in inherit_event()
14725 	if (parent_event->state <= PERF_EVENT_STATE_REVOKED)  in inherit_event()
14733 	child_event = perf_event_alloc(&parent_event->attr,  in inherit_event()
14734 					   parent_event->cpu,  in inherit_event()
14736 					   group_leader, parent_event,  in inherit_event()
14744 	pmu_ctx = find_get_pmu_context(parent_event->pmu_ctx->pmu, child_ctx, child_event);  in inherit_event()
14757 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
14758 	if (is_orphaned_event(parent_event) ||  in inherit_event()
14759 	    !atomic_long_inc_not_zero(&parent_event->refcount)) {  in inherit_event()
14760 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
14775 	if (parent_event->attr.freq) {  in inherit_event()
14776 		u64 sample_period = parent_event->hw.sample_period;  in inherit_event()
14785 	child_event->overflow_handler = parent_event->overflow_handler;  in inherit_event()
14787 		= parent_event->overflow_handler_context;  in inherit_event()
14806 	list_add_tail(&child_event->child_list, &parent_event->child_list);  in inherit_event()
14807 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()
14822 static int inherit_group(struct perf_event *parent_event,  in inherit_group()  argument
14832 	leader = inherit_event(parent_event, parent, parent_ctx,  in inherit_group()
14841 	for_each_sibling_event(sub, parent_event) {  in inherit_group()
14847 		if (sub->aux_event == parent_event && child_ctr &&  in inherit_group()
14852 		leader->group_generation = parent_event->group_generation;  in inherit_group()