ip: stash a pointer to msghdr in struct ping_fakehdr

... instead of storing its ->mgs_iter.iov there
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

include/net/ping.h

@@ -59,7 +59,7 @@ extern struct pingv6_ops pingv6_ops;
 
 struct pingfakehdr {
 	struct icmphdr icmph;
-	struct iovec *iov;
+	struct msghdr *msg;
 	sa_family_t family;
 	__wsum wcheck;
 };

net/ipv4/ping.c

@@ -602,14 +602,14 @@ int ping_getfrag(void *from, char *to,
 		if (fraglen < sizeof(struct icmphdr))
 			BUG();
 		if (csum_partial_copy_fromiovecend(to + sizeof(struct icmphdr),
-			    pfh->iov, 0, fraglen - sizeof(struct icmphdr),
+			    pfh->msg->msg_iter.iov, 0, fraglen - sizeof(struct icmphdr),
 			    &pfh->wcheck))
 			return -EFAULT;
 	} else if (offset < sizeof(struct icmphdr)) {
 			BUG();
 	} else {
 		if (csum_partial_copy_fromiovecend
-				(to, pfh->iov, offset - sizeof(struct icmphdr),
+				(to, pfh->msg->msg_iter.iov, offset - sizeof(struct icmphdr),
 				 fraglen, &pfh->wcheck))
 			return -EFAULT;
 	}
@@ -811,8 +811,7 @@ static int ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *m
 	pfh.icmph.checksum = 0;
 	pfh.icmph.un.echo.id = inet->inet_sport;
 	pfh.icmph.un.echo.sequence = user_icmph.un.echo.sequence;
-	/* XXX: stripping const */
-	pfh.iov = (struct iovec *)msg->msg_iter.iov;
+	pfh.msg = msg;
 	pfh.wcheck = 0;
 	pfh.family = AF_INET;
 

net/ipv6/ping.c

@@ -163,8 +163,7 @@ int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
 	pfh.icmph.checksum = 0;
 	pfh.icmph.un.echo.id = inet->inet_sport;
 	pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence;
-	/* XXX: stripping const */
-	pfh.iov = (struct iovec *)msg->msg_iter.iov;
+	pfh.msg = msg;
 	pfh.wcheck = 0;
 	pfh.family = AF_INET6;