linux-kernel - Re: [PATCH v7] coccinelle: tests: unsigned value cannot be lesser than zero

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Message-ID: <20160107143713.GA7411@sepie.suse.cz>
Date:	Thu, 7 Jan 2016 15:37:13 +0100
From:	Michal Marek <mmarek@...e.com>
To:	Julia Lawall <julia.lawall@...6.fr>
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Gilles Muller <Gilles.Muller@...6.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	open list <linux-kernel@...r.kernel.org>,
	"moderated list:COCCINELLE/Semantic Patches (SmPL)" 
	<cocci@...teme.lip6.fr>
Subject: Re: [PATCH v7] coccinelle: tests: unsigned value cannot be lesser
 than zero

On Thu, Jan 07, 2016 at 12:35:34PM +0100, Julia Lawall wrote:
> 
> On Thu, 7 Jan 2016, Andrzej Hajda wrote:
> 
> > Unsigned expressions cannot be lesser than zero. Presence of comparisons
> > 'unsigned (<|<=|>|>=) 0' often indicates a bug, usually wrong type of variable.
> > The patch beside finding such comparisons tries to eliminate false positives,
> > mainly by bypassing range checks.
> >
> > gcc can detect such comparisons also using -Wtype-limits switch, but it warns
> > also in correct cases, making too much noise.
> >
> > Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
> 
> Acked-by: Julia Lawall <julia.lawall@...6.fr>

Thanks to both of you, applied to kbuild.git#misc now.

Michal
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