2208 	struct perf_event *parent_event = event->parent;  in perf_child_detach()  local
2215 	if (WARN_ON_ONCE(!parent_event))  in perf_child_detach()
2218 	lockdep_assert_held(&parent_event->child_mutex);  in perf_child_detach()
11443 		 struct perf_event *parent_event,  in perf_event_alloc()  argument
11502 	event->parent		= parent_event;  in perf_event_alloc()
11523 	if (parent_event)  in perf_event_alloc()
11524 		event->clock = parent_event->clock;  in perf_event_alloc()
11526 	if (!overflow_handler && parent_event) {  in perf_event_alloc()
11527 		overflow_handler = parent_event->overflow_handler;  in perf_event_alloc()
11528 		context = parent_event->overflow_handler_context;  in perf_event_alloc()
11531 			struct bpf_prog *prog = parent_event->prog;  in perf_event_alloc()
11536 				parent_event->orig_overflow_handler;  in perf_event_alloc()
12590 	struct perf_event *parent_event = child_event->parent;  in sync_child_event()  local
12605 	atomic64_add(child_val, &parent_event->child_count);  in sync_child_event()
12607 		     &parent_event->child_total_time_enabled);  in sync_child_event()
12609 		     &parent_event->child_total_time_running);  in sync_child_event()
12615 	struct perf_event *parent_event = event->parent;  in perf_event_exit_event()  local
12618 	if (parent_event) {  in perf_event_exit_event()
12632 		mutex_lock(&parent_event->child_mutex);  in perf_event_exit_event()
12645 	if (parent_event) {  in perf_event_exit_event()
12646 		mutex_unlock(&parent_event->child_mutex);  in perf_event_exit_event()
12650 		perf_event_wakeup(parent_event);  in perf_event_exit_event()
12652 		put_event(parent_event);  in perf_event_exit_event()
12883 inherit_event(struct perf_event *parent_event,  in inherit_event()  argument
12890 	enum perf_event_state parent_state = parent_event->state;  in inherit_event()
12900 	if (parent_event->parent)  in inherit_event()
12901 		parent_event = parent_event->parent;  in inherit_event()
12903 	child_event = perf_event_alloc(&parent_event->attr,  in inherit_event()
12904 					   parent_event->cpu,  in inherit_event()
12906 					   group_leader, parent_event,  in inherit_event()
12929 	mutex_lock(&parent_event->child_mutex);  in inherit_event()
12930 	if (is_orphaned_event(parent_event) ||  in inherit_event()
12931 	    !atomic_long_inc_not_zero(&parent_event->refcount)) {  in inherit_event()
12932 		mutex_unlock(&parent_event->child_mutex);  in inherit_event()
12950 	if (parent_event->attr.freq) {  in inherit_event()
12951 		u64 sample_period = parent_event->hw.sample_period;  in inherit_event()
12961 	child_event->overflow_handler = parent_event->overflow_handler;  in inherit_event()
12963 		= parent_event->overflow_handler_context;  in inherit_event()
12982 	list_add_tail(&child_event->child_list, &parent_event->child_list);  in inherit_event()
12983 	mutex_unlock(&parent_event->child_mutex);  in inherit_event()
12998 static int inherit_group(struct perf_event *parent_event,  in inherit_group()  argument
13008 	leader = inherit_event(parent_event, parent, parent_ctx,  in inherit_group()
13017 	for_each_sibling_event(sub, parent_event) {  in inherit_group()
13023 		if (sub->aux_event == parent_event && child_ctr &&  in inherit_group()