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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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3
net/sctp/socket.c
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@ -6592,8 +6592,7 @@ static int sctp_msghdr_parse(const struct msghdr *msg, sctp_cmsgs_t *cmsgs)
struct cmsghdr *cmsg;
struct msghdr *my_msg = (struct msghdr *)msg;
for (cmsg = CMSG_FIRSTHDR(msg); cmsg != NULL;
cmsg = CMSG_NXTHDR(my_msg, cmsg)) {
for_each_cmsghdr(cmsg, my_msg) {
if (!CMSG_OK(my_msg, cmsg))
return -EINVAL;