in_drvwalk
dp = in_drvwalk(np, bname);
dp = in_drvwalk(np, bname);
if ((dp = in_drvwalk(np, bname)) == NULL) {
static in_drv_t *in_drvwalk(in_node_t *np, char *binding_name);
dp = in_drvwalk(np, name);
dp = in_drvwalk(np, (char *)ddi_driver_name(dip));