linux-kernel - Re: [Outreachy kernel] Re: [PATCH] iio: adc: max1363: constify attribute

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Message-ID: <alpine.DEB.2.20.1703292331160.2146@hadrien>
Date:   Wed, 29 Mar 2017 23:31:51 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...6.fr>
To:     SIMRAN SINGHAL <singhalsimran0@...il.com>
cc:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        linux-iio@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        outreachy-kernel <outreachy-kernel@...glegroups.com>
Subject: Re: [Outreachy kernel] Re: [PATCH] iio: adc: max1363: constify
 attribute_group structures



On Thu, 30 Mar 2017, SIMRAN SINGHAL wrote:

> On Thu, Mar 30, 2017 at 2:41 AM, Jonathan Cameron <jic23@...nel.org> wrote:
> > On 28/03/17 21:15, simran singhal wrote:
> >> Check for attribute_group structures that are only stored in the
> >> event_attrs filed of iio_info structure. As the event_attrs field of
> >> iio_info structures is constant, so these attribute_group structures can
> >> also be declared constant. Done using coccinelle:
> >>
> >> @r1 disable optional_qualifier @
> >> identifier i;
> >> position p;
> >> @@
> >> static struct attribute_group i@p = {...};
> >>
> >> @ok1@
> >> identifier r1.i;
> >> position p;
> >> struct iio_info x;
> >> @@
> >> x.event_attrs=&i@p;
> >>
> >> @bad@
> >> position p!={r1.p,ok1.p};
> >> identifier r1.i;
> >> @@
> >> i@p
> >>
> >> @depends on !bad disable optional_qualifier@
> >> identifier r1.i;
> >> @@
> >> static
> >> +const
> >> struct attribute_group i={...};
> >>
> >> @depends on !bad disable optional_qualifier@
> >> identifier r1.i;
> >> @@
> >> +const
> >> struct attribute_group i;
> >>
> >> File size before:
> >>    text    data     bss     dec     hex filename
> >>   36951     448       0   37399    9217 drivers/iio/adc/max1363.o
> >>
> >> File size after:
> >>    text          data     bss     dec     hex filename
> >>   37015           384       0   37399    9217 drivers/iio/adc/max1363.o
> >>
> >> Signed-off-by: simran singhal <singhalsimran0@...il.com>
> > Applied to the togreg branch of iio.git and pushed out as testing for
> > the autobuilders to play with it.
> >
>
> But my tree is up-to-date and I also test it before sending.

One never knows...

julia


>
> > Thanks,
> >
> > Jonathan
> >> ---
> >>  drivers/iio/adc/max1363.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
> >> index c6c12fe..80eada4 100644
> >> --- a/drivers/iio/adc/max1363.c
> >> +++ b/drivers/iio/adc/max1363.c
> >> @@ -1007,7 +1007,7 @@ static struct attribute *max1363_event_attributes[] = {
> >>       NULL,
> >>  };
> >>
> >> -static struct attribute_group max1363_event_attribute_group = {
> >> +static const struct attribute_group max1363_event_attribute_group = {
> >>       .attrs = max1363_event_attributes,
> >>  };
> >>
> >>
> >
>
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