linux-kernel - Re: [bug] crash when reading /proc/mounts (was: Re: Linux 2.6.23-rc9 and a heads-up for the 2.6.24 series..)

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Date:	Thu, 4 Oct 2007 19:08:43 +0400
From:	"Alexey Dobriyan" <adobriyan@...il.com>
To:	"Adrian Bunk" <bunk@...nel.org>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Ingo Molnar" <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	"Greg KH" <gregkh@...e.de>,
	"Alexander Viro" <viro@....linux.org.uk>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>
Subject: Re: [bug] crash when reading /proc/mounts (was: Re: Linux 2.6.23-rc9 and a heads-up for the 2.6.24 series..)

On 10/4/07, Adrian Bunk <bunk@...nel.org> wrote:
> On Wed, Oct 03, 2007 at 08:11:05AM -0700, Linus Torvalds wrote:
> >...
> > and btw, there is no question what-so-ever about whether your compiler
> > might be doing a legal optimization - the compiler really is wrong, and is
> > total shit. You need to make a gcc bug-report.
> >...
>
> Ingo can't send a gcc bug-report since gcc 4.0 is no longer supported
> upstream and a 4.1.2 compiler was confirmed to work.

Ingo can upgrade to 4.0.4. :-)

> Our only options are to either stop supporting the broken gcc versions
> as compiler for the kernel or to work around this compiler bug in the
> kernel.

Distro can backport a fix for miscompilation while leaving, say,
__GNUC_MINOR__ intact, so banning version numbers aren't terribly
useful.

Perhaps, someone should write a script/test program to check for known
miscompilations. to cure himself from deprecation disease.

    Alexey "make cc_check" Dobriyan
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