static int __init blk_mq_init(void)
{
	blk_mq_cpu_init();

	hotcpu_notifier(blk_mq_queue_reinit_notify, 0);

	return 0;
}

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.