Re: [PATCH v2] net: introduce helper macro for_each_cmsghdr

From: David Miller
Date: Wed Dec 10 2014 - 20:47:12 EST

From: Gu Zheng <guz.fnst@xxxxxxxxxxxxxx>
Date: Thu, 11 Dec 2014 09:05:59 +0800

> IMO, the user-land programs need to be build with the matched
> headers separately.

You absolutely cannot provide this new interface to userland and
expect programs to be able to just use it, it's non-standard and does
not exist in older headers.

I do not want this new interface available to userland programs.
They can just open-code the list traversal just like every program
in history has had to do since BSD UNIX.
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