linux-kernel - Re: coccinelle: also catch kzfree() issues

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Date:	Tue, 16 Feb 2016 21:02:17 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Julia Lawall <julia.lawall@...6.fr>
Cc:	Yann Droneaud <ydroneaud@...eya.com>,
	Gilles Muller <Gilles.Muller@...6.fr>,
	Nicolas Palix <nicolas.palix@...g.fr>,
	Michal Marek <mmarek@...e.com>, Tejun Heo <tj@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	cocci@...teme.lip6.fr, linux-kernel@...r.kernel.org,
	Johannes Weiner <hannes@...xchg.org>
Subject: Re: coccinelle: also catch kzfree() issues

>>  @free@
>> +identifier kfree =~ "kz?free";
> 
> Thanks for the suggestions.  However, the regular expression is not such a
> good idea.

How much is such a SmPL constraint still usable then?


> Coccinelle doesn't make any optimizations based on regulat expressions.

Where can your software optimise the source code search?


> It would be better to put a disjunction with kfree and kzfree explicitly,
> as in the other cases.

What are the circumstances for corresponding benefits?

Regards,
Markus