linux-kernel - Re: [PATCH] libata: Shut up annoying native

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Message-ID: <20121220130159.7125e700@pyramind.ukuu.org.uk>
Date:	Thu, 20 Dec 2012 13:01:59 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Borislav Petkov <bp@...en8.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org
Subject: Re: [PATCH] libata: Shut up annoying native_sectors warning

On Thu, 20 Dec 2012 13:25:55 +0100
Borislav Petkov <bp@...en8.de> wrote:

> I'm getting this
> 
> drivers/ata/libata-core.c: In function ‘ata_hpa_resize’:
> drivers/ata/libata-core.c:1397:3: warning: ‘native_sectors’ may be used uninitialized in this function [-Wmaybe-uninitialized]
> 
> for a couple of kernel releases now with gcc (Debian 4.7.2-4) 4.7.2.
> 
> And the warning is bogus because ata_read_native_max_address either
> returns a sensible max_sectors aka native_sectors through its second
> arg pointer or an error value which is properly handled in its caller
> ata_hpa_resize().
> 
> So shut up gcc already.

And ensure it won't be noticed if a real problem is found. So we go from
warning for a few people who ignore it, to silence for everyone if a real
bug appears

Net lose IMHO - better to file a gcc bug report

Alan

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