linux-kernel - Re: [PATCH] iio: adc: ad799x: constify attribute

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Message-ID: <CALrZqyPEoNOQvaXmLHfk7bmNAdDyosZsjCnGnXuttsAvQsAm3w@mail.gmail.com>
Date:   Thu, 30 Mar 2017 02:58:50 +0530
From:   SIMRAN SINGHAL <singhalsimran0@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Hartmut Knaack <knaack.h@....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: [PATCH] iio: adc: ad799x: constify attribute_group structures

On Thu, Mar 30, 2017 at 2:43 AM, Jonathan Cameron <jic23@...nel.org> wrote:
> On 28/03/17 21:07, 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
>>   26051     464       0   26515    6793 drivers/iio/adc/ad799x.o
>>
>> File size after:
>>    text          data     bss     dec     hex filename
>>   26115           400       0   26515    6793 drivers/iio/adc/ad799x.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.

> Thanks,
>
> Jonathan
>> ---
>>  drivers/iio/adc/ad799x.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
>> index 9704090..22426ae 100644
>> --- a/drivers/iio/adc/ad799x.c
>> +++ b/drivers/iio/adc/ad799x.c
>> @@ -520,7 +520,7 @@ static struct attribute *ad799x_event_attributes[] = {
>>       NULL,
>>  };
>>
>> -static struct attribute_group ad799x_event_attrs_group = {
>> +static const struct attribute_group ad799x_event_attrs_group = {
>>       .attrs = ad799x_event_attributes,
>>  };
>>
>>
>