BDINST
inst = BDINST(dev);
inst = BDINST(dev);
inst = BDINST(dev);
inst = BDINST(bp->b_edev);
if ((bd = ddi_get_soft_state(bd_state, BDINST(dev))) == NULL) {
inst = BDINST(bp->b_edev);
inst = BDINST(dev);
inst = BDINST((dev_t)arg);