BTBC_XMIT
sc->sc_flags &= ~BTBC_XMIT;
KASSERT((sc->sc_flags & BTBC_XMIT) == 0);
sc->sc_flags |= BTBC_XMIT;
sc->sc_flags &= ~BTBC_XMIT;
if ((sc->sc_flags & BTBC_XMIT) == 0)
if ((sc->sc_flags & BTBC_XMIT) == 0)
if ((sc->sc_flags & BTBC_XMIT) == 0)