linux-kernel - Re: linux-next: Tree for Nov 15 (thermal: THERMAL_GOV_POWER

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Date:   Thu, 5 Dec 2019 04:36:09 +0000
From:   Quentin Perret <qperret@...gle.com>
To:     Zhang Rui <rui.zhang@...el.com>
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Eduardo Valentin <edubezval@...il.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Amit Kucheria <amit.kucheria@...durent.com>
Subject: Re: linux-next: Tree for Nov 15 (thermal:
 THERMAL_GOV_POWER_ALLOCATOR)

Hi all,

On Thursday 05 Dec 2019 at 12:27:47 (+0800), Zhang Rui wrote:
> I overlooked the original report probably because I was not CCed.
> 
> This is introduced by commit a4e893e802e6("thermal: cpu_cooling:
> Migrate to using the EM framework") which adds the dependency of
> ENERGY_MODEL for THERMAL_GOV_POWER_ALLOCATOR.
> 
> To fix this, it's better to make THERMAL_DEFAULT_GOV_POWER_ALLOCATOR
> depends on THERMAL_GOV_POWER_ALLOCATOR instead.
> 
> Please confirm the problem is fixed by below patch.
> 
> thanks,
> rui
> 
> From c9429f6e28ea2219686a4294d39f015ba373774b Mon Sep 17 00:00:00 2001
> From: Zhang Rui <rui.zhang@...el.com>
> Date: Thu, 5 Dec 2019 12:17:07 +0800
> Subject: [PATCH] thermal: fix a Kconfig warning
> 
> Currently, THERMAL_GOV_POWER_ALLOCATOR is selected by
> THERMAL_DEFAULT_GOV_POWER_ALLOCATOR even if it has some unmet
> dependencies.
> 
> This causes the Kconfig warning
>    WARNING: unmet direct dependencies detected for
>       THERMAL_GOV_POWER_ALLOCATOR
>       Depends on [n]: THERMAL [=y] && ENERGY_MODEL [=n]
>       Selected by [y]:
>       - THERMAL_DEFAULT_GOV_POWER_ALLOCATOR [=y] && <choice>
> 
> Fix the problem by making THERMAL_DEFAULT_GOV_POWER_ALLOCATOR depends on
> THERMAL_GOV_POWER_ALLOCATOR instead.
> 
> Fixes: a4e893e802e6("thermal: cpu_cooling: Migrate to using the EM framework")
> Signed-off-by: Zhang Rui <rui.zhang@...el.com>
> ---
>  drivers/thermal/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> index 59b79fc48266..79b27865c6f4 100644
> --- a/drivers/thermal/Kconfig
> +++ b/drivers/thermal/Kconfig
> @@ -108,7 +108,7 @@ config THERMAL_DEFAULT_GOV_USER_SPACE
>  
>  config THERMAL_DEFAULT_GOV_POWER_ALLOCATOR
>  	bool "power_allocator"
> -	select THERMAL_GOV_POWER_ALLOCATOR
> +	depends on THERMAL_GOV_POWER_ALLOCATOR
>  	help
>  	  Select this if you want to control temperature based on
>  	  system and device power allocation. This governor can only
> -- 
> 2.17.1

FWIW, a similar fix has been suggested a couple weeks back:

  https://lore.kernel.org/lkml/20191113105313.41616-1-yuehaibing@huawei.com/

Thanks,
Quentin