class_simple_device_remove(IB_UCM_DEV); class_simple_destroy(ib_ucm_class);
class_device_destroy(ib_ucm_class, IB_UCM_DEV); class_destroy(ib_ucm_class);
static void __exit ib_ucm_cleanup(void){	class_simple_device_remove(IB_UCM_DEV);	class_simple_destroy(ib_ucm_class);	cdev_del(&ib_ucm_cdev);	unregister_chrdev_region(IB_UCM_DEV, 1);}