extintr_establish
void *extintr_establish(int, int, int, int (*)(void *), void *);
smsc->sc_ih = extintr_establish(EXTINTR_INTR_SMC91C111, IST_LEVEL,
sc->sc_ih = extintr_establish(EXTINTR_INTR_CFIREQ, IST_LEVEL, ipl,
sc->sc_ih = extintr_establish(LANDISK_INTR_BTN, IPL_TTY, btn_intr, sc);
return extintr_establish(irq, level, ih_fun, ih_arg);
sc->sc_ih = extintr_establish(LANDISK_INTR_PWRSW, IPL_TTY,
void *extintr_establish(int irq, int level, int (*func)(void *), void *arg);
return extintr_establish(ih, level, ih_fun, ih_arg);