linux-kernel - Re: [PATCH 12/16] drivers/cpufreq/pxa3xx-cpufreq.c: Avoid using ARRAY_AND

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Date:	Mon, 12 Aug 2013 07:45:26 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Viresh Kumar <viresh.kumar@...aro.org>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>, kernel-janitors@...r.kernel.org,
	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/16] drivers/cpufreq/pxa3xx-cpufreq.c: Avoid using
 ARRAY_AND_SIZE(e) as a function argument



On Mon, 12 Aug 2013, Viresh Kumar wrote:

> On 11 August 2013 22:21, Julia Lawall <Julia.Lawall@...6.fr> wrote:
> > From: Julia Lawall <Julia.Lawall@...6.fr>
> >
> > Replace ARRAY_AND_SIZE(e) in function argument position to avoid hiding the
> > arity of the called function.
> 
> Makes sense.
> 
> > The semantic match that makes this change is as follows:
> > (http://coccinelle.lip6.fr/)
> 
> What is this doing here?

I'm not sure to understand the sense of the question.  The semantic patch 
explains exactly what considerations were used when making the 
transformation.  That is, any function call, having a call to 
ARRAY_AND_SIZE as an argument is rewritten to replace the call to 
ARRAY_AND_SIZE with the correspondingtwo arguments.  The transformation 
was performed entirely automatically, although in a lot of cases it was 
necessary to add newlines afterwards.

julia

> > // <smpl>
> > @@
> > expression e,f;
> > @@
> >
> > f(...,
> > - ARRAY_AND_SIZE(e)
> > + e,ARRAY_SIZE(e)
> >   ,...)
> > // </smpl>
> >
> > Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
> >
> > ---
> > Not compiled.
> >
> >  drivers/cpufreq/pxa3xx-cpufreq.c |    6 ++++--
> >  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
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