From: Simon Horman <horms@verge.net.au>
To: Marin Mitov <mitov@issp.bas.bg>
Cc: David Airlie <airlied@linux.ie>,
Jesse Barnes <jesse.barnes@intel.com>,
dri-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: [PATCH]Silancing a false positive: "may be used uninitialized"
Date: Mon, 21 Dec 2009 08:14:36 +1100 [thread overview]
Message-ID: <20091220211433.GA6025@verge.net.au> (raw)
In-Reply-To: <200912201243.20111.mitov@issp.bas.bg>
On Sun, Dec 20, 2009 at 12:43:19PM +0200, Marin Mitov wrote:
> On Sunday 20 December 2009 11:56:44 am Simon Horman wrote:
> > On Sun, Dec 20, 2009 at 09:03:27AM +0200, Marin Mitov wrote:
> > > Hello all,
> > >
> > > Silancing a false positive:
> > > warning: 'width' may be used uninitialized in this function
> > > drivers/gpu/drm/drm_edid.c
> >
> > Is it guaranteed that the switch will always see a value covered by the
> > four cases it has?
>
> Yes it is. The value is masked (& 0xc0) so all the possible values are
> (0x00, 0x40, 0x80, 0xc0) covered by the switch. That's why it is false positive.
Of course, silly me.
prev parent reply other threads:[~2009-12-20 21:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-20 7:03 [PATCH]Silancing a false positive: "may be used uninitialized" Marin Mitov
2009-12-20 9:56 ` Simon Horman
2009-12-20 10:43 ` Marin Mitov
2009-12-20 21:14 ` Simon Horman [this message]
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