linux-kernel - Re: [PATCH 4/6] cpufreq: Add a get_current

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Date:	Mon, 28 Jan 2013 10:07:10 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	André Przywara <andre@...rep.de>,
	Leonid Isaev <lisaev@...il.iu.edu>,
	Tom Gundersen <teg@...m.no>, cpufreq@...r.kernel.org,
	linux-acpi@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>
Subject: Re: [PATCH 4/6] cpufreq: Add a get_current_driver helper

On Sun, Jan 20, 2013 at 3:54 PM, Borislav Petkov <bp@...en8.de> wrote:
> From: Borislav Petkov <bp@...e.de>
>
> Add a helper function to return cpufreq_driver->name.
>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> ---
>  drivers/cpufreq/cpufreq.c | 14 ++++++++++++++
>  include/linux/cpufreq.h   |  1 +
>  2 files changed, 15 insertions(+)
>
> diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
> index 1f93dbd72355..6ed3c1377caf 100644
> --- a/drivers/cpufreq/cpufreq.c
> +++ b/drivers/cpufreq/cpufreq.c
> @@ -1386,6 +1386,20 @@ static struct syscore_ops cpufreq_syscore_ops = {
>         .resume         = cpufreq_bp_resume,
>  };
>
> +/**
> + *     cpufreq_get_current_driver - return current driver's name
> + *
> + *     Return the name string of the currently loaded cpufreq driver
> + *     or NULL, if none.
> + */
> +const char *cpufreq_get_current_driver(void)
> +{
> +       if (cpufreq_driver)
> +               return cpufreq_driver->name;
> +
> +       return NULL;
> +}
> +EXPORT_SYMBOL_GPL(cpufreq_get_current_driver);
>
>  /*********************************************************************
>   *                     NOTIFIER LISTS INTERFACE                      *
> diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
> index a55b88eaf96a..a018da2d2a7c 100644
> --- a/include/linux/cpufreq.h
> +++ b/include/linux/cpufreq.h
> @@ -407,4 +407,5 @@ void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
>                                       unsigned int cpu);
>
>  void cpufreq_frequency_table_put_attr(unsigned int cpu);
> +extern const char *cpufreq_get_current_driver(void);

Two minor things here:
- You placed the routine at bad place. This place is meant for
freq_table helpers.
- And you really don't need extern for function prototypes.

And after fixing these, feel free to add

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