G_MIRROR_DEVICE_FLAG_TASTING
if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_TASTING) != 0)
sc->sc_flags |= G_MIRROR_DEVICE_FLAG_TASTING;
sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_TASTING;
sc->sc_flags |= G_MIRROR_DEVICE_FLAG_TASTING;
sc->sc_flags &= ~G_MIRROR_DEVICE_FLAG_TASTING;