ip_generic_getfrag, udplite_getfrag: switch to passing msghdr

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 4a929ad..cdedcf1 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -752,14 +752,14 @@
 int
 ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb)
 {
-	struct iovec *iov = from;
+	struct msghdr *msg = from;
 
 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
-		if (memcpy_fromiovecend(to, iov, offset, len) < 0)
+		if (memcpy_fromiovecend(to, msg->msg_iov, offset, len) < 0)
 			return -EFAULT;
 	} else {
 		__wsum csum = 0;
-		if (csum_partial_copy_fromiovecend(to, iov, offset, len, &csum) < 0)
+		if (csum_partial_copy_fromiovecend(to, msg->msg_iov, offset, len, &csum) < 0)
 			return -EFAULT;
 		skb->csum = csum_block_add(skb->csum, csum, odd);
 	}