[NET]: annotate csum_ipv6_magic() callers in net/*

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index 646a474..8d1b542 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -100,12 +100,13 @@
 		}
 		/* fall through */
 	case CHECKSUM_NONE:
-		skb->csum = ~csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
+		skb->csum = ~csum_unfold(
+				csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
 					     skb->len - dataoff,
 					     protocol,
 					     csum_sub(0,
 						      skb_checksum(skb, 0,
-							           dataoff, 0)));
+							           dataoff, 0))));
 		csum = __skb_checksum_complete(skb);
 	}
 	return csum;