linux-kernel - Re: [PATCH] rtc: add const to rtc_class

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Message-ID: <20170111001450.6kmxtinx2n2iyh5o@piout.net>
Date:   Wed, 11 Jan 2017 01:14:50 +0100
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     Bhumika Goyal <bhumirks@...il.com>
Cc:     julia.lawall@...6.fr, a.zummo@...ertech.it,
        rtc-linux@...glegroups.com,
        adi-buildroot-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtc: add const to rtc_class_ops structures

On 05/01/2017 at 22:48:37 +0530, Bhumika Goyal wrote :
> Declare rtc_class_ops structures as const as they are only passed
> as an argument to the function devm_rtc_device_register. This argument
> is of type const struct rtc_class_ops *, so rtc_class_ops structures
> having this property can be declared const.
> Done using Coccinelle:
> 
> @r1 disable optional_qualifier @
> identifier i;
> position p;
> @@
> static struct rtc_class_ops i@p = {...};
> 
> @ok1@
> identifier r1.i;
> position p;
> @@
> devm_rtc_device_register(...,&i@p,...)
> 
> @bad@
> position p!={r1.p,ok1.p};
> identifier r1.i;
> @@
> i@p
> 
> @depends on !bad disable optional_qualifier@
> identifier r1.i;
> @@
> +const
> struct rtc_class_ops i;
> 
> Signed-off-by: Bhumika Goyal <bhumirks@...il.com>
> ---
> Compilation was terminated while compiling the .o files for all the 
> changed .c files. Therefore file size details of the .o files 
> could not be obtained.
> 
>  drivers/rtc/rtc-au1xxx.c | 2 +-
>  drivers/rtc/rtc-bfin.c   | 2 +-
>  drivers/rtc/rtc-ls1x.c   | 2 +-
>  drivers/rtc/rtc-sh.c     | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
> 
Applied and squashed in the previous one.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com