G_MIRROR_DEVICE_FLAG_CLOSEWAIT
KASSERT((sc->sc_flags & G_MIRROR_DEVICE_FLAG_CLOSEWAIT) != 0,
(sc->sc_flags & G_MIRROR_DEVICE_FLAG_CLOSEWAIT) != 0 ||
if ((sc->sc_flags & G_MIRROR_DEVICE_FLAG_CLOSEWAIT) != 0 &&
sc->sc_flags |= G_MIRROR_DEVICE_FLAG_CLOSEWAIT;