DVB_MAJOR
dev_t dev = MKDEV(DVB_MAJOR, 0);
pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR);
unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
DVB_MAJOR, minor);
MKDEV(DVB_MAJOR, minor),
device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor));