#include <linux/cdev.h>

struct cdev
cdev_init(cdev, fops)
cdev * cdev_alloc()
cdev->fops = fops
cdev_add(cdev, dev_t, unsigned n) (n is 1 most of the time)
cdev_del(cdev)


older way!?!
register_chrdev/unregister_chrdev
propose new way!?!