linux-kernel - Re: [PATCH] mpparse.c:231: warning: comparison is always false

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Message-ID: <20060915081123.GA2572@ff.dom.local>
Date:	Fri, 15 Sep 2006 10:11:23 +0200
From:	Jarek Poplawski <jarkao2@...pl>
To:	Andrew Morton <akpm@...l.org>
Cc:	Andi Kleen <ak@....de>, Dave Jones <davej@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mpparse.c:231: warning: comparison is always false

On Thu, Sep 14, 2006 at 06:17:54PM -0700, Andrew Morton wrote:
> On Wed, 13 Sep 2006 08:50:10 +0200
> Jarek Poplawski <jarkao2@...pl> wrote:
> 
> > Hello,
> > 
> > Probably after 2.6.18-rc6-git1 there is this cc warning: 
> > "arch/i386/kernel/mpparse.c:231: warning: comparison is
> > always false due to limited range of data type".
> > Maybe this patch will be helpful.
> > 
> 
> Thanks.   Andi has already queued a similar patch.
> 
> Andi, you might as well scoot that upstream, otherwise we'll get lots of
> emails about it.
...
> > +#if 0xFF >= MAX_MP_BUSSES
> >  	if (m->mpc_busid >= MAX_MP_BUSSES) {

As a matter of fact today I think my patch is wrong.

I don't know how Andi has fixed it, but after rethinking
the question of Dave Jones I see it's fixing the result
instead of the source of a problem (char or not char).

So it's more serious problem just for really serious guys
like you.

Thanks for response,

Jarek P. 
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