Function tdq_lock_pair

freebsd/kern/sched_ule.c:896–906

* Lock two thread queues using their address to maintain lock order. */

 * Lock two thread queues using their address to maintain lock order.
 */
static void
tdq_lock_pair(struct tdq *one, struct tdq *two)
{
	if (one < two) {
		TDQ_LOCK(one);
		TDQ_LOCK_FLAGS(two, MTX_DUPOK);
	} else {
		TDQ_LOCK(two);
		TDQ_LOCK_FLAGS(one, MTX_DUPOK);
	}
}

/*
 * Unlock two thread queues.  Order is not important here.