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Date: Thu, 9 Aug 2007 04:39:20 +0200
From: =?utf-8?B?SsO2cm4=?= Engel <joern@logfs.org>
To: Christoph Hellwig <hch@infradead.org>, J??rn Engel <joern@logfs.org>,
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Subject: Re: [Patch 18/18] include/linux/Kbuild
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On Thu, 9 August 2007 03:39:06 +0100, Christoph Hellwig wrote:
> On Thu, Aug 09, 2007 at 04:32:17AM +0200, J??rn Engel wrote:
> > On Thu, 9 August 2007 01:19:13 +0100, Christoph Hellwig wrote:
> > > On Wed, Aug 08, 2007 at 06:24:47PM +0200, J??rn Engel wrote:
> > > > --- linux-2.6.21logfs/include/linux/Kbuild~logfs	2007-08-08 02:57:37.000000000 +0200
> > > > +++ linux-2.6.21logfs/include/linux/Kbuild	2007-08-08 02:57:37.000000000 +0200
> > > > @@ -101,6 +101,7 @@ header-y += jffs2.h
> > > >  header-y += keyctl.h
> > > >  header-y += limits.h
> > > >  header-y += lock_dlm_plock.h
> > > > +header-y += logfs.h
> > > 
> > > That file doesn't define any kind of user<->kernel interface and thus should
> > > not be exported.
> > 
> > mklogfs needs the header.  Does that not qualify?
> 
> No.  We been through this example (filesystem layouts) a few times.
> It's of course not a kernel interface, and sharing it actually is harmfull,
> because it means you can't change the structure layout for your filesystem
> definition anymore, which unlike an actual ondisk change happens very
> frequently, e.g. when introducing new unions keyed off a feature flag,
> or similar things.  So please ship a copy with your userspace tools
> package.

Fair enough.  Does the file still make sense in include/linux/ then?

Jörn

-- 
All art is but imitation of nature.
-- Lucius Annaeus Seneca