linux-kernel - Re: [bug] ata subsystem related crash with latest -git

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Message-ID: <20071017192546.GZ15552@kernel.dk>
Date:	Wed, 17 Oct 2007 21:25:47 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jgarzik@...ox.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [bug] ata subsystem related crash with latest -git

On Wed, Oct 17 2007, Ingo Molnar wrote:
> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > > > drivers/scsi/scsi_lib.c:708: warning: 'index' may be used uninitialized in this function
> > > > drivers/scsi/scsi_lib.c:708: note: 'index' was declared here
> > > > 
> > > > not sure it matters.
> > > 
> > > Hmm, I don't see them here (gcc 4.2.1). Must be the BUG(), does it go 
> > > away if you add a index = -1 in the default: case? Just to be 
> > > absolutely sure...
> > 
> > well if i initialize the variable then of course the warning goes away
> > :)
> > 
> > NOTE: i get the same warning even without the BUG_ON() patch, and 
> > without your other fix patch as well. I'm using gcc 4.2.2. (Do you get 
> > the warning if you pick up the config i sent you earlier today?)
> 
> btw., i changed the initialization to -1 and the crash still occurs 
> (as expected).

Would think so, thanks for checking though.

-- 
Jens Axboe

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