static void sw_perf_event_destroy(struct perf_event *event)
{
	u64 event_id = event->attr.config;

	WARN_ON(event->parent);

	static_key_slow_dec(&perf_swevent_enabled[event_id]);
	swevent_hlist_put();
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.