put iov_iter into msghdr

Note that the code _using_ ->msg_iter at that point will be very
unhappy with anything other than unshifted iovec-backed iov_iter.
We still need to convert users to proper primitives.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index 5b7a1ed..2d31483 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -163,7 +163,8 @@
 	pfh.icmph.checksum = 0;
 	pfh.icmph.un.echo.id = inet->inet_sport;
 	pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
-	pfh.iov = msg->msg_iov;
+	/* XXX: stripping const */
+	pfh.iov = (struct iovec *)msg->msg_iter.iov;
 	pfh.wcheck = 0;
 	pfh.family = AF_INET6;
 
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 11a9283..ee25631 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -886,7 +886,8 @@
 
 back_from_confirm:
 	if (inet->hdrincl)
-		err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags);
+		/* XXX: stripping const */
+		err = rawv6_send_hdrinc(sk, (struct iovec *)msg->msg_iter.iov, len, &fl6, &dst, msg->msg_flags);
 	else {
 		lock_sock(sk);
 		err = ip6_append_data(sk, raw6_getfrag, &rfv,