void unregister_one_node(int nid)
{
	if (!node_devices[nid])
		return;

	unregister_node(node_devices[nid]);
	node_devices[nid] = NULL;
}
void unregister_one_node(int nid)
{
	if (!node_devices[nid])
		return;

	unregister_node(node_devices[nid]);
	node_devices[nid] = NULL;
}