CTF_STATWAIT
if ((sc->sc_flags & CTF_STATWAIT) == 0) {
sc->sc_flags |= CTF_STATWAIT;
sc->sc_flags &= ~CTF_STATWAIT;
if ((sc->sc_flags & CTF_STATWAIT) == 0) {
sc->sc_flags |= CTF_STATWAIT;
sc->sc_flags &= ~CTF_STATWAIT;