int register_netdevice (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.
Callers must hold the rtnl semaphore. You may want register_netdev instead of this.
The locking appears insufficient to guarantee two parallel registers will not get the same name.