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net: introduce helper macro for_each_cmsghdr

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Introduce helper macro for_each_cmsghdr as a wrapper of the enumerating
cmsghdr from msghdr, just cleanup.

Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gu Zheng 2014-12-11 11:22:04 +08:00 • committed by David S. Miller
parent dd0bcc0bc8
commit f95b414edb
10 changed files with 15 additions and 16 deletions
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4
net/iucv/af_iucv.c
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@ -1070,9 +1070,7 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
txmsg.class = 0;
/* iterate over control messages */
for (cmsg = CMSG_FIRSTHDR(msg); cmsg;
cmsg = CMSG_NXTHDR(msg, cmsg)) {
for_each_cmsghdr(cmsg, msg) {
if (!CMSG_OK(msg, cmsg)) {
err = -EINVAL;
goto out;