linux-kernel - Re: [PATCH] ALSA: declare snd_kcontrol

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Date:   Tue, 30 May 2017 10:56:39 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     Takashi Iwai <tiwai@...e.de>
cc:     Bhumika Goyal <bhumirks@...il.com>, alsa-devel@...a-project.org,
        lgirdwood@...il.com, broonie@...nel.org, clemens@...isch.de,
        julia.lawall@...6.fr, linuxppc-dev@...ts.ozlabs.org,
        perex@...ex.cz, johannes@...solutions.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: declare snd_kcontrol_new structures as const



On Tue, 30 May 2017, Takashi Iwai wrote:

> On Sat, 27 May 2017 16:46:15 +0200,
> Bhumika Goyal wrote:
> >
> > Declare snd_kcontrol_new structures as const as they are only passed an
> > argument to the function snd_ctl_new1. This argument is of type const,
> > so snd_kcontrol_new structures having this property can be made const.
> > Done using Coccinelle:
> >
> > @r disable optional_qualifier@
> > identifier x;
> > position p;
> > @@
> > static struct snd_kcontrol_new x@......};
> >
> > @ok@
> > identifier r.x;
> > position p;
> > @@
> > snd_ctl_new1(&x@p,...)
> >
> > @bad@
> > position p != {r.p,ok.p};
> > identifier r.x;
> > @@
> > x@p
> >
> > @depends on !bad disable optional_qualifier@
> > identifier r.x;
> > @@
> > +const
> > struct snd_kcontrol_new x;
> >
> > Cross compiled these files:
> > sound/aoa/codecs/tas.c - powerpc
> > sound/mips/{hal2.c/sgio2audio.c} - mips
> > sound/ppc/{awacs.c/beep.c/tumbler.c} - powerpc
> > sound/soc/sh/siu_dai.c - sh
> > Could not find an architecture to compile sound/sh/aica.c.
> >
> > Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
>
> Applied now, as it looks safe enough.  But I prefer splitting to
> individual patches, so please try to do that at the next time.

Individual patches in a series?

julia