ldi_vp_from_devid
(void) ldi_vp_from_devid(devid, minor, &vd->vdev_devid_vp);
if ((ret = ldi_vp_from_devid(devid, minor_name, &vp)) != 0)
extern int ldi_vp_from_devid(ddi_devid_t, const char *, vnode_t **);