On Fri, 2014-12-05 at 15:14 +0800, Gu Zheng wrote:
> Introduce helper macra
macro
> CMSG_FOREACH_HDR as a wrapper of the enumerating
> cmsghdr from msghdr, just cleanup.
maybe better to use lower case "for_each_cmsg_hdr"
or some such.
checkpatch would recognize that too as long as it
uses "for_each".
> diff --git a/include/linux/socket.h b/include/linux/socket.h
[]
> @@ -94,6 +94,10 @@ struct cmsghdr {
> (cmsg)->cmsg_len <= (unsigned long) \
> ((mhdr)->msg_controllen - \
> ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
> +#define CMSG_FOREACH_HDR(cmsg, msg) \
> + for (cmsg = CMSG_FIRSTHDR(msg); \
> + cmsg; \
> + cmsg = CMSG_NXTHDR(msg, cmsg))
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