ath_rxbuf_init
ret = ath_rxbuf_init(sc,
(void) ath_rxbuf_init(sc, bf);
(void) ath_rxbuf_init(sc, bf);
int error = ath_rxbuf_init(sc, bf);
extern int ath_rxbuf_init(struct ath_softc *sc, struct ath_buf *bf);