REL_HWHEEL
evdev_support_rel(sc->sc_evdev, REL_HWHEEL);
evdev_push_rel(sc->sc_evdev, REL_HWHEEL, dt);
evdev_support_rel(evdev_r, REL_HWHEEL);
evdev_push_rel(sc->evdev_r, REL_HWHEEL, z / 2);
evdev_support_rel(sysmouse_evdev, REL_HWHEEL);
evdev_push_rel(sysmouse_evdev, REL_HWHEEL, z / 2);
evdev_push_rel(sysmouse_evdev, REL_HWHEEL, 1);
evdev_push_rel(sysmouse_evdev, REL_HWHEEL, -1);