ZBOOTDEV_MAJOR
rc = register_chrdev(ZBOOTDEV_MAJOR, ZBOOTDEV_NAME, &fops);
ZBOOTMOD_NAME, ZBOOTDEV_MAJOR, -rc);
&proc_root, MKDEV(ZBOOTDEV_MAJOR, 0));
(void)unregister_chrdev(ZBOOTDEV_MAJOR, ZBOOTDEV_NAME);
ZBOOTMOD_NAME, ZBOOTDEV_MAJOR);
(void)unregister_chrdev(ZBOOTDEV_MAJOR, ZBOOTDEV_NAME);