bufq_peek
if (bufq_peek(&sc->sc_bufq))
if (bufq_peek(&sc->sc_bufq))
if (bufq_peek(&st->sc_bufq))
int bufq_peek(struct bufq *);
if (bufq_peek(&mfsp->mfs_bufq))
if (mfsp->mfs_shutdown && bufq_peek(&mfsp->mfs_bufq))