xfrm: Use frag list abstraction interfaces.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/xfrm/xfrm_algo.c

@@ -696,8 +696,9 @@ int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *desc,
 {
 	int start = skb_headlen(skb);
 	int i, copy = start - offset;
-	int err;
+	struct sk_buff *frag_iter;
 	struct scatterlist sg;
+	int err;
 
 	/* Checksum header. */
 	if (copy > 0) {
@@ -742,19 +743,16 @@ int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *desc,
 		start = end;
 	}
 
-	if (skb_shinfo(skb)->frag_list) {
-		struct sk_buff *list = skb_shinfo(skb)->frag_list;
-
-		for (; list; list = list->next) {
+	skb_walk_frags(skb, frag_iter) {
 		int end;
 
 		WARN_ON(start > offset + len);
 
-			end = start + list->len;
+		end = start + frag_iter->len;
 		if ((copy = end - offset) > 0) {
 			if (copy > len)
 				copy = len;
-				err = skb_icv_walk(list, desc, offset-start,
+			err = skb_icv_walk(frag_iter, desc, offset-start,
 					   copy, icv_update);
 			if (unlikely(err))
 				return err;
@@ -764,7 +762,6 @@ int skb_icv_walk(const struct sk_buff *skb, struct hash_desc *desc,
 		}
 		start = end;
 	}
-	}
 	BUG_ON(len);
 	return 0;
 }