net: Add and use skb_copy_datagram_msg() helper.

This encapsulates all of the skb_copy_datagram_iovec() callers
with call argument signature "skb, offset, msghdr->msg_iov, length".

When we move to iov_iters in the networking, the iov_iter object will
sit in the msghdr.

Having a helper like this means there will be less places to touch
during that transformation.

Based upon descriptions and patch from Al Viro.

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

2 files changed, 2 insertions, 2 deletions

diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
index 290352c0e6b4..0918bc21eae6 100644
--- a/net/phonet/datagram.c
+++ b/net/phonet/datagram.c
@@ -150,7 +150,7 @@ static int pn_recvmsg(struct kiocb *iocb, struct sock *sk,
                 copylen = len;
         }
 
-        rval = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copylen);
+        rval = skb_copy_datagram_msg(skb, 0, msg, copylen);
         if (rval) {
                 rval = -EFAULT;
                 goto out;
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index 70a547ea5177..44b2123e22b8 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -1296,7 +1296,7 @@ copy:
         else
                 len = skb->len;
 
-        err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, len);
+        err = skb_copy_datagram_msg(skb, 0, msg, len);
         if (!err)
                 err = (flags & MSG_TRUNC) ? skb->len : len;