cv_wait(&zrl->zr_cv, &zrl->zr_mtx);
}
ASSERT3S(zrl->zr_refcount, >=, 0);
zrl->zr_refcount++;
atomic_inc_32(&zrl->zr_refcount);
#ifdef ZFS_DEBUG
zrl->zr_owner = curthread;
zrl->zr_caller = zc;