Function sleepq_lock

freebsd/kern/subr_sleepqueue.c:261–268

* Lock the sleep queue chain associated with the specified wait channel. */

 * Lock the sleep queue chain associated with the specified wait channel.
 */
void
sleepq_lock(const void *wchan)
{
	struct sleepqueue_chain *sc;

	sc = SC_LOOKUP(wchan);
	mtx_lock_spin(&sc->sc_lock);
}

/*
 * Look up the sleep queue associated with a given wait channel in the hash