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

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Date:	Tue, 15 Sep 2015 15:51:14 +0200
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	Julia Lawall <julia.lawall@...6.fr>,
	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Gilles Muller <Gilles.Muller@...6.fr>,
	Joe Perches <joe@...ches.com>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	Michal Marek <mmarek@...e.com>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org, cocci@...teme.lip6.fr
Subject: Re: [PATCH] coccinelle: tests: unsigned value cannot be lesser than
 zero

On 09/15/2015 03:31 PM, Julia Lawall wrote:
> On Tue, 15 Sep 2015, SF Markus Elfring wrote:
>
>>>>  v@p
>>>> (
>>>> *< 0
>>>> |
>>>> *<= 0
>>>> )
>>> It does not, and is not intended to, work.  The branches of a disjunction
>>> should be complete expressions.
>> Will the following SmPL approach be more appropriate then?
>>
>> (
>> *v@p < 0
>> |
>> *v@p <= 0
>> )
> Actually, all of
>
> v < 0 (never true)
> v <= 0 (same as v == 0)
> v >= 0 (always true)
>
> would seem to merit attention.  Andrzej, what do you think?

You are right, the 2nd case should be also addressed,
such code is misleading.
I will prepare then 2nd version of the patch.

Regards
Andrzej

>
> julia
>
>
>> Regards,
>> Markus
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