misc.c

static struct miscdevice my_miscdev = {
	.minor      = 11,
	.name       = "misc_dev",
	.fops       = &mydev_fops,
};

static int __init init_modules(void)
{
	int ret;
	ret = misc_register(&my_miscdev);
	if (ret != 0) {
	printk("cannot register miscdev on minor=11 (err=%d)\n",ret);
	}

	return 0;
}

static void __exit exit_modules(void)
{
	misc_deregister(&my_miscdev);
}