linux-kernel - Re: [PATCH] cpufreq: cpufreq_stats: constify attribute

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Date:   Mon, 3 Jul 2017 14:30:17 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     rjw@...ysocki.net, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpufreq: cpufreq_stats: constify attribute_group
 structures.

On 03-07-17, 13:29, Arvind Yadav wrote:
> attribute_groups are not supposed to change at runtime. All functions
> working with attribute_groups provided by <linux/sysfs.h> work with const
> attribute_group. So mark the non-const structs as const.
> 
> File size before:
>    text	   data	    bss	    dec	    hex	filename
>    1655	    256	      4	   1915	    77b	drivers/cpufreq/cpufreq_stats.o
> 
> File size After adding 'const':
>    text	   data	    bss	    dec	    hex	filename
>    1695	    192	      4	   1891	    763	drivers/cpufreq/cpufreq_stats.o
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
> ---
>  drivers/cpufreq/cpufreq_stats.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
> index f570ead..d362739 100644
> --- a/drivers/cpufreq/cpufreq_stats.c
> +++ b/drivers/cpufreq/cpufreq_stats.c
> @@ -135,7 +135,7 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
>  	&trans_table.attr,
>  	NULL
>  };
> -static struct attribute_group stats_attr_group = {
> +static const struct attribute_group stats_attr_group = {
>  	.attrs = default_attrs,
>  	.name = "stats"
>  };

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh