rt_mtu
atomic_cas_uint(&rt->rt_mtu, 0, LOMTU);
mtu = atomic_load_int(&rt->rt_mtu);
nhmtu = atomic_load_int(&nhrt->rt_mtu);
atomic_cas_uint(&rt->rt_mtu, mtu, nhmtu);
atomic_store_int(&rt->rt_mtu, 0);
rtmtu = atomic_load_int(&rt->rt_mtu);
atomic_cas_uint(&rt->rt_mtu, rtmtu, mtu);
atomic_store_int(&rt->rt_mtu, 0);
rtmtu = atomic_load_int(&rt->rt_mtu);
mtu = atomic_load_int(&ro->ro_rt->rt_mtu);
rtmtu = atomic_load_int(&ro->ro_rt->rt_mtu);
atomic_cas_uint(&ro->ro_rt->rt_mtu, rtmtu,
atomic_store_int(&rt->rt_mtu, tdb->tdb_mtu);
rtmtu = atomic_load_int(&rt->rt_mtu);
atomic_cas_uint(&rt->rt_mtu, rtmtu, mtu);
atomic_store_int(&rt->rt_mtu, 0);
rtmtu = atomic_load_int(&rt->rt_mtu);
rtmtu = atomic_load_int(&rt->rt_mtu);
mtu = rtmtu = atomic_load_int(&rt->rt_mtu);
atomic_cas_uint(&rt->rt_mtu, rtmtu, mtu);
atomic_store_int(&rt->rt_mtu, tdb->tdb_mtu);