From: Michal Marek <mmarek@suse.com>
To: Julia Lawall <julia.lawall@lip6.fr>
Cc: Andrzej Hajda <a.hajda@samsung.com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Gilles Muller <Gilles.Muller@lip6.fr>,
Nicolas Palix <nicolas.palix@imag.fr>,
open list <linux-kernel@vger.kernel.org>,
"moderated list:COCCINELLE/Semantic Patches (SmPL)"
<cocci@systeme.lip6.fr>
Subject: Re: [PATCH v7] coccinelle: tests: unsigned value cannot be lesser than zero
Date: Thu, 7 Jan 2016 15:37:13 +0100 [thread overview]
Message-ID: <20160107143713.GA7411@sepie.suse.cz> (raw)
In-Reply-To: <alpine.DEB.2.10.1601071235020.2515@hadrien>
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@samsung.com>
>
> Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Thanks to both of you, applied to kbuild.git#misc now.
Michal
prev parent reply other threads:[~2016-01-07 14:37 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-30 11:06 [PATCH v4] coccinelle: tests: unsigned value cannot be lesser than zero Andrzej Hajda
2015-12-30 11:29 ` Julia Lawall
2015-12-30 12:33 ` Andrzej Hajda
2015-12-30 13:25 ` [PATCH v5] " Andrzej Hajda
2015-12-30 14:06 ` Julia Lawall
2016-01-04 7:45 ` [PATCH v6] " Andrzej Hajda
2016-01-05 12:59 ` Geyslan G. Bem
2016-01-05 13:02 ` Julia Lawall
2016-01-05 14:10 ` Geyslan G. Bem
2016-01-05 16:48 ` Geyslan G. Bem
2016-01-05 13:49 ` Andrzej Hajda
2016-01-05 14:18 ` Geyslan G. Bem
2016-01-05 14:17 ` Julia Lawall
2016-01-05 14:29 ` Andrzej Hajda
2016-01-07 9:36 ` [PATCH v7] " Andrzej Hajda
2016-01-07 11:35 ` Julia Lawall
2016-01-07 14:37 ` Michal Marek [this message]
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