/* Returns true if the platfrom needs sk_buff unmapping. The compiler optimizes away unecessary code if this returns true.  */
static int need_skb_unmap(void)
/* Returns true if the platfrom needs sk_buff unmapping. The compiler optimizes away unecessary code if this returns true.  */
static int need_skb_unmap(void)
{
	struct dummy {
		DECLARE_PCI_UNMAP_ADDR(addr);
	};
	return sizeof(struct dummy) != 0;
}