linux-kernel - Re: [PATCH 1/3] CLK: uninline clk_prepare() and clk

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Date:	Tue, 20 Nov 2012 15:43:55 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Mike Turquette <mturquette@...com>
Subject: Re: [PATCH 1/3] CLK: uninline clk_prepare() and clk_unprepare()

On 20 November 2012 14:52, Dmitry Torokhov <dmitry.torokhov@...il.com> wrote:
> We'll need to invoke clk_unprepare() via a pointer in our devm_*
> conversion so let's uninline the pair.

Sorry, but you aren't doing this :(
This routine is already uninlined as it is in clk.c

Instead you are just moving clk_prepare(), etc calls within
#ifdef CONFIG_HAVE_CLK
#else
#endif

I doubt why they have been added under #ifdef CONFIG_HAVE_CLK_PREPARE
earlier. Can they exist without CONFIG_HAVE_CLK

@Mike: ?

> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> ---
>  drivers/clk/clk.c   |  4 ++++
>  include/linux/clk.h | 68 +++++++++++++++++++++++++----------------------------
>  2 files changed, 36 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> index 56e4495e..1b642f2 100644
> --- a/drivers/clk/clk.c
> +++ b/drivers/clk/clk.c
> @@ -374,6 +374,7 @@ struct clk *__clk_lookup(const char *name)
>
>  void __clk_unprepare(struct clk *clk)
>  {
> +#ifdef CONFIG_HAVE_CLK_PREPARE

clk.c is compiled if COMMON_CLK is selected. And COMMON_CLK has following:
	select HAVE_CLK_PREPARE

So, these checks you added don't have a meaning.

>         if (!clk)
>                 return;
>
> @@ -389,6 +390,7 @@ void __clk_unprepare(struct clk *clk)
>                 clk->ops->unprepare(clk->hw);
>
>         __clk_unprepare(clk->parent);
> +#endif
>  }
>
>  /**
> @@ -412,6 +414,7 @@ EXPORT_SYMBOL_GPL(clk_unprepare);
>
>  int __clk_prepare(struct clk *clk)
>  {
> +#ifdef CONFIG_HAVE_CLK_PREPARE

ditto.

>         int ret = 0;
>
>         if (!clk)
> @@ -432,6 +435,7 @@ int __clk_prepare(struct clk *clk)
>         }
>
>         clk->prepare_count++;
> +#endif
>
>         return 0;
>  }
> diff --git a/include/linux/clk.h b/include/linux/clk.h
> index b3ac22d..f8204c3 100644
> --- a/include/linux/clk.h
> +++ b/include/linux/clk.h
> @@ -84,42 +84,6 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb);
>
>  #endif
>
> -/**
> - * clk_prepare - prepare a clock source
> - * @clk: clock source
> - *
> - * This prepares the clock source for use.
> - *
> - * Must not be called from within atomic context.
> - */
> -#ifdef CONFIG_HAVE_CLK_PREPARE
> -int clk_prepare(struct clk *clk);
> -#else
> -static inline int clk_prepare(struct clk *clk)
> -{
> -       might_sleep();
> -       return 0;
> -}
> -#endif
> -
> -/**
> - * clk_unprepare - undo preparation of a clock source
> - * @clk: clock source
> - *
> - * This undoes a previously prepared clock.  The caller must balance
> - * the number of prepare and unprepare calls.
> - *
> - * Must not be called from within atomic context.
> - */
> -#ifdef CONFIG_HAVE_CLK_PREPARE
> -void clk_unprepare(struct clk *clk);
> -#else
> -static inline void clk_unprepare(struct clk *clk)
> -{
> -       might_sleep();
> -}
> -#endif
> -
>  #ifdef CONFIG_HAVE_CLK
>  /**
>   * clk_get - lookup and obtain a reference to a clock producer.
> @@ -159,6 +123,27 @@ struct clk *clk_get(struct device *dev, const char *id);
>  struct clk *devm_clk_get(struct device *dev, const char *id);
>
>  /**
> + * clk_prepare - prepare a clock source
> + * @clk: clock source
> + *
> + * This prepares the clock source for use.
> + *
> + * Must not be called from within atomic context.
> + */
> +int clk_prepare(struct clk *clk);
> +
> +/**
> + * clk_unprepare - undo preparation of a clock source
> + * @clk: clock source
> + *
> + * This undoes a previously prepared clock.  The caller must balance
> + * the number of prepare and unprepare calls.
> + *
> + * Must not be called from within atomic context.
> + */
> +void clk_unprepare(struct clk *clk);
> +
> +/**
>   * clk_enable - inform the system when the clock source should be running.
>   * @clk: clock source
>   *
> @@ -292,6 +277,17 @@ static inline void clk_put(struct clk *clk) {}
>
>  static inline void devm_clk_put(struct device *dev, struct clk *clk) {}
>
> +static inline int clk_prepare(struct clk *clk)
> +{
> +       might_sleep();
> +       return 0;
> +}
> +
> +static inline void clk_unprepare(struct clk *clk)
> +{
> +       might_sleep();
> +}
> +
>  static inline int clk_enable(struct clk *clk)
>  {
>         return 0;
> --
> 1.7.11.7
>
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