Re: [PATCH] posix_types.h: Cleanup stale __NFDBITS and related definitions

[Josh Boyer <jwboyer@redhat.com>]

On Wed, Jul 25, 2012 at 08:33:22PM -0500, Jonathan Nieder wrote:
> Hi,
> 
> Josh Boyer wrote:
> 
> > Indeed.  However, I believe Linus pointed out that even before
> > 8b3d1cda4f5f the macros that were removed weren't actually used.
> > It's likely safe to go back further than just 3.4.
> >
> > I'll verify again in the morning and include the furthest back we could
> > remove these.  For now, let's go with what you suggest to be safe.
> 
> I may be in the minority in having this view or missing a subtlety,
> but shouldn't the question be the furthest back we need to remove
> these rather than the furthest back we could?

That should be the question, yes.  The answer is:

However far back people wish to use older stable kernel-headers to build
applications against newer glibc.

It isn't a clear answer.  Some people stick with older kernels while
they update their userspace.  I was thinking along the lines of the 3.0
kernel being the oldest I'd check for but if people think we shouldn't
bother than that's fine by me.

josh