linux-kernel - Re: LOCALVERSION_AUTO considered harmful

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Message-ID: <20100411201426.GC25294@elf.ucw.cz>
Date:	Sun, 11 Apr 2010 22:14:26 +0200
From:	Pavel Machek <pavel@....cz>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: LOCALVERSION_AUTO considered harmful

On Sun 2010-04-11 20:58:58, Geert Uytterhoeven wrote:
> On Mon, Apr 12, 2010 at 20:51, Alexey Dobriyan <adobriyan@...il.com> wrote:
> > On Sun, Apr 11, 2010 at 06:47:01PM +0200, Pavel Machek wrote:
> >> @@ -99,6 +98,11 @@ config LOCALVERSION_AUTO
> >>         appended after any matching localversion* files, and after the value
> >>         set in CONFIG_LOCALVERSION.
> >>
> >> +       Unfortunately, such finegrained versioning will mean that you will
> >> +       not be able to use modules for development; even "make modules"
> >> +       will change module versions, making recompiled modules impossible
> >> +       to insert into old kernel.
> >
> > That's conditional BS.
> > Turn off CONFIG_MODVERSIONS already.
> 
> Yeah, I disabled it ages ago. Even then (before git, probably even
> before bitkeeper)
> I had hard times inserting modules...

I _had_ it off

 # CONFIG_MODVERSIONS is not set

It seems some checking survives CONFIG_MODVERSIONS unset and that
checking is strict enough to refuse module load after one "make
modules" with LOCALVERSION_AUTO on...
									Pavel

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