devfs_remove("usb"); 
void usb_major_cleanup(void){	class_destroy(usb_class);	devfs_remove("usb");	unregister_chrdev(USB_MAJOR, "usb");}
4520	/local/tlutelli/issta_data/temp/c/2005_temp/2005/4520/d6e5bcf4a7ebbe258124a931f1449338340a99b5/file.c/clean/drivers/usb/core/file.c