sys/kern/uipc_usrreq.c

289 	KASSERT(unp->unp_streamlock != NULL);
290 	KASSERT(sotounpcb(so2)->unp_streamlock == NULL);
291 	lock = unp->unp_streamlock;
292 	unp->unp_streamlock = NULL;
325 	KASSERT(unp->unp_streamlock == NULL);
326 	unp->unp_streamlock = olock;
338 	if (unp->unp_streamlock != NULL)
339 		mutex_obj_free(unp->unp_streamlock);
847 	 * There is a race here: sotounpcb(so2)->unp_streamlock
854 	 * the socket locked. Grabbing sotounpcb(so2)->unp_streamlock
857 	mutex_enter(sotounpcb(so2)->unp_streamlock);
868 	/* so_lock now points to unp_streamlock */