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net: Add and use skb_copy_datagram_msg() helper.

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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 <[email protected]>
This commit is contained in:
David S. Miller 2014-11-05 16:46:40 -05:00
commit 51f3d02b98
43 changed files with 58 additions and 57 deletions
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2
drivers/isdn/mISDN/socket.c
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@ -163,7 +163,7 @@ mISDN_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
memcpy(skb_push(skb, MISDN_HEADER_LEN), mISDN_HEAD_P(skb),
MISDN_HEADER_LEN);
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
err = skb_copy_datagram_msg(skb, 0, msg, copied);
mISDN_sock_cmsg(sk, msg, skb);