backlight_props
struct backlight_props props;
struct backlight_props props;
bcopy(ap->a_data, &props, sizeof(struct backlight_props));
bcopy(&props, ap->a_data, sizeof(struct backlight_props));
bcopy(ap->a_data, &props, sizeof(struct backlight_props));
bcopy(&props, ap->a_data, sizeof(struct backlight_props));
#define BACKLIGHTGETSTATUS _IOWR('G', 0, struct backlight_props)
#define BACKLIGHTUPDATESTATUS _IOWR('G', 1, struct backlight_props)
struct backlight_props props;