static void can_dellink(struct net_device *dev, struct list_head *head);

and

static void can_dellink(struct net_device *dev, struct list_head *head)
{
	return;
}

Wouldn't the canonical form be this:

static void can_dellink(struct net_device *dev, struct list_head *head)
{
}


- the curly braces make sure this isn't a forward definition
- but no useless return either


But then again, this "return" is only cosmetical. No compiler will
generate any code from it.