unregister_netdev - remove device from the kernel
void unregister_netdev (struct net_device * dev);
This function shuts down a device interface and removes it from the kernel tables. On success 0 is returned, on a failure a negative errno code is returned. This is just a wrapper for unregister_netdevice that takes the rtnl semaphore. In general you want to use this and not unregister_netdevice.