linux-kernel - Re: [PATCH 1/5] cpuidle: Remove pointless stub

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Date:   Fri, 16 Oct 2020 17:24:07 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Lina Iyer <ilina@...eaurora.org>
Subject: Re: [PATCH 1/5] cpuidle: Remove pointless stub

On Thu, Oct 15, 2020 at 4:44 PM Daniel Lezcano
<daniel.lezcano@...aro.org> wrote:
>
> The cpuidle.h header is declaring functions with an empty stub when
> cpuidle is not enabled. However these functions are only called from
> the governors which depends on cpuidle. In other words, when the
> function is called it is when cpuidle is enabled, there is no
> situation when it is called with cpuidle disabled.
>
> Remove the pointless stub.
>
> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> ---
>  include/linux/cpuidle.h | 5 -----
>  1 file changed, 5 deletions(-)
>
> diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
> index 6175c77bf25e..74fdcc6106b1 100644
> --- a/include/linux/cpuidle.h
> +++ b/include/linux/cpuidle.h
> @@ -270,13 +270,8 @@ struct cpuidle_governor {
>         void (*reflect)         (struct cpuidle_device *dev, int index);
>  };
>
> -#ifdef CONFIG_CPU_IDLE
>  extern int cpuidle_register_governor(struct cpuidle_governor *gov);
>  extern s64 cpuidle_governor_latency_req(unsigned int cpu);
> -#else
> -static inline int cpuidle_register_governor(struct cpuidle_governor *gov)
> -{return 0;}
> -#endif
>
>  #define __CPU_PM_CPU_IDLE_ENTER(low_level_idle_enter,                  \
>                                 idx,                                    \
> --

Applied (this patch alone) as 5.10-rc material with some minor edits
in the changelog, thanks!