SYN_TIME
((SYN_TIME(sc, sc->gesture_start_packet)
SYN_TIME(sc, sc->gesture_start_packet)
gesture_len = SYN_TIME(sc, sc->gesture_start_packet);
if (SYN_TIME(sc, sc->gesture_tap_packet) <
SYN_TIME(sc, sc->gesture_tap_packet), synaptics_gesture_length);