Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751663AbdDAKjY (ORCPT ); Sat, 1 Apr 2017 06:39:24 -0400 Received: from saturn.retrosnub.co.uk ([178.18.118.26]:40919 "EHLO saturn.retrosnub.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751501AbdDAKjW (ORCPT ); Sat, 1 Apr 2017 06:39:22 -0400 Subject: Re: [PATCH] iio: adc: hx711: constify attribute_group structures To: simran singhal References: <20170401081751.GA30133@singhal-Inspiron-5558> Cc: Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org From: Jonathan Cameron Message-ID: <0c6e66fe-b4fe-de86-2af9-edff8a9e65b1@kernel.org> Date: Sat, 1 Apr 2017 11:39:20 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20170401081751.GA30133@singhal-Inspiron-5558> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1667 Lines: 67 On 01/04/17 09:17, simran singhal wrote: > Check for attribute_group structures that are only stored in the > attrs filed of iio_info structure. As the 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.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 > 3042 480 0 3522 dc2 drivers/iio/adc/hx711.o > > File size after: > text data bss dec hex filename > 3098 416 0 3514 dba drivers/iio/adc/hx711.o > > Signed-off-by: simran singhal Applied. > --- > drivers/iio/adc/hx711.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c > index 139639f..27005d8 100644 > --- a/drivers/iio/adc/hx711.c > +++ b/drivers/iio/adc/hx711.c > @@ -369,7 +369,7 @@ static struct attribute *hx711_attributes[] = { > NULL, > }; > > -static struct attribute_group hx711_attribute_group = { > +static const struct attribute_group hx711_attribute_group = { > .attrs = hx711_attributes, > }; > >