ZRL_LOCKED
(uint32_t *)&zrl->zr_refcount, 0, ZRL_LOCKED);
ASSERT3S(zrl->zr_refcount, ==, ZRL_LOCKED);
return (zrl->zr_refcount == ZRL_LOCKED);
while (n != ZRL_LOCKED) {
while (zrl->zr_refcount == ZRL_LOCKED) {