register_netdevice -- register a network device
(struct net_device * dev);
Take a completed network device structure and add it to the kernel
interfaces. A NETDEV_REGISTER message is sent to the netdev notifier
chain. 0 is returned on success. A negative errno code is returned
on a failure to set up the device, or if the name is a duplicate.
The locking appears insufficient to guarantee two parallel registers
will not get the same name.