linux-kernel - Re: [PATCH] powernow-k8: Add a kconfig dependency on acpi-cpufreq

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Date:	Thu, 17 Jan 2013 13:53:55 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Borislav Petkov <bp@...en8.de>
Cc:	"Gopalakrishnan, Aravind" <Aravind.Gopalakrishnan@....com>,
	Andre Przywara <andre@...rep.de>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andreas <linuxuser330250@....net>
Subject: Re: [PATCH] powernow-k8: Add a kconfig dependency on acpi-cpufreq

On Thursday, January 17, 2013 12:58:44 PM Borislav Petkov wrote:
> From: Borislav Petkov <bp@...e.de>
> Date: Thu, 17 Jan 2013 12:44:20 +0100
> Subject: [PATCH] powernow-k8: Add a kconfig dependency on acpi-cpufreq
> 
> Andreas reports in https://bugzilla.kernel.org/show_bug.cgi?id=51741
> that with his Gentoo config, acpi-cpufreq wasn't enabled and powernow-k8
> couldn't handoff properly to acpi-cpufreq leading to running without
> P-state support (i.e., cores are constantly in P0).
> 
> To alleaviate that, we need to make powernow-k8 depend on acpi-cpufreq
> so that acpi-cpufreq is always present.

OK

Do we need that in -stable?

Rafael


> Cc: Andre Przywara <andre@...rep.de>
> Reported-by: Andreas <linuxuser330250@....net>
> Signed-off-by: Borislav Petkov <bp@...e.de>
> ---
>  drivers/cpufreq/Kconfig.x86 | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
> index 934854ae5eb4..7227cd734042 100644
> --- a/drivers/cpufreq/Kconfig.x86
> +++ b/drivers/cpufreq/Kconfig.x86
> @@ -106,7 +106,7 @@ config X86_POWERNOW_K7_ACPI
>  config X86_POWERNOW_K8
>  	tristate "AMD Opteron/Athlon64 PowerNow!"
>  	select CPU_FREQ_TABLE
> -	depends on ACPI && ACPI_PROCESSOR
> +	depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
>  	help
>  	  This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
>  	  Support for K10 and newer processors is now in acpi-cpufreq.
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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