linux-kernel - Re: [PATCH 1/1] scripts/coccinelle/free: add conditional kfree test

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Date:	Tue, 17 Jun 2014 23:33:00 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Joe Perches <joe@...ches.com>
cc:	Fabian Frederick <fabf@...net.be>, linux-kernel@...r.kernel.org,
	Gilles Muller <Gilles.Muller@...6.fr>
Subject: Re: [PATCH 1/1] scripts/coccinelle/free: add conditional kfree
 test



On Tue, 17 Jun 2014, Joe Perches wrote:

> On Tue, 2014-06-17 at 21:43 +0200, Fabian Frederick wrote:
> > This patch adds a trivial script warning on
> > 
> > if(foo)
> > 	kfree(foo)
> > 
> > (based on checkpatch)
> []
> > diff --git a/scripts/coccinelle/free/cond_kfree.cocci b/scripts/coccinelle/free/cond_kfree.cocci
> []
> > +* if (E)
> > +*	kfree@p(E);
> 
> You should probably add all of the unnecessary
> conditional tests that checkpatch uses:
> 
> kfree
> usb_free_urb
> debugfs_remove
> debugfs_remove_recursive

Personally, I would prefer that the message encourage the user to consider 
whether it is necessary to call these functions with NULL as an argument 
in any case.

julia
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