wsdisplay_burner
struct wsdisplay_burner burners;
struct wsdisplay_burner burners;
#define WSDISPLAYIO_SBURNER _IOW('W', 81, struct wsdisplay_burner)
#define WSDISPLAYIO_GBURNER _IOR('W', 82, struct wsdisplay_burner)
#define d ((struct wsdisplay_burner *)data)
void wsdisplay_burner(void *v);
wsdisplay_burner(sc);
timeout_set(&sc->sc_burner, wsdisplay_burner, sc);