__unregister_chrdev - unregister and destroy a cdev
void __unregister_chrdev(unsigned int major, unsigned int baseminor, unsigned int count, const char * name);
Unregister and destroy the cdev occupying the region described by major, baseminor and count. This function undoes what __register_chrdev did.
|January 2017||Kernel Hackers Manual 4.8.|