tape_class_device
struct tape_class_device * nt;
struct tape_class_device * rt;
void unregister_tape_dev(struct device *device, struct tape_class_device *tcd)
struct tape_class_device *register_tape_dev(
struct tape_class_device * tcd;
tcd = kzalloc_obj(struct tape_class_device);
struct tape_class_device *register_tape_dev(
void unregister_tape_dev(struct device *device, struct tape_class_device *tcd);