WSMUXDEV
n = WSMUXDEV(n); /* limit range */
unit = WSMUXDEV(minr);
struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)];
struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)];
int u = WSMUXDEV(minor(dev));
struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)];
struct wsmux_softc *sc = wsmuxdevs[WSMUXDEV(minr)];