TULIPF_DOING_SETUP
if ((sc->sc_flags & TULIPF_DOING_SETUP) == 0)
sc->sc_flags &= ~TULIPF_DOING_SETUP;
if (txs == NULL && (sc->sc_flags & TULIPF_DOING_SETUP) == 0)
sc->sc_flags &= ~(TULIPF_WANT_SETUP | TULIPF_DOING_SETUP);
(sc->sc_flags & TULIPF_DOING_SETUP) != 0) {
sc->sc_flags |= TULIPF_DOING_SETUP;
doing_setup = (sc->sc_flags & TULIPF_DOING_SETUP);