void __exit cdu31a_exit(void)
static void __exit cdu31a_exit(void)
void __exit cdu31a_exit(void){	del_gendisk(scd_gendisk);	put_disk(scd_gendisk);	if (unregister_cdrom(&scd_info)) {		printk(KERN_WARNING PFX "Can't unregister from Uniform "				"cdrom driver\n");		return;	}	if ((unregister_blkdev(MAJOR_NR, "cdu31a") == -EINVAL)) {		printk(KERN_WARNING PFX "Can't unregister\n");		return;	}	blk_cleanup_queue(cdu31a_queue);	if (cdu31a_irq > 0)		free_irq(cdu31a_irq, NULL);	release_region(cdu31a_port, 4);	printk(KERN_INFO PFX "module released.\n");}