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