__set_bit(BTN_BACK, psmouse->dev->keybit);
__set_bit(BTN_FORWARD, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);
__set_bit(BTN_BACK, psmouse->dev->keybit);
__set_bit(BTN_FORWARD, psmouse->dev->keybit);
__set_bit(REL_WHEEL, psmouse->dev->relbit);