linux-kernel - Re: [PATCH 0/5] Add P state driver for Intel Core Processors

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Message-ID: <1540905.Sh9giL2bZe@vostro.rjw.lan>
Date:	Thu, 14 Feb 2013 13:21:31 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Dirk Brandewie <dirk.brandewie@...il.com>,
	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org,
	cpufreq@...r.kernel.org
Subject: Re: [PATCH 0/5] Add P state driver for Intel Core Processors

On Thursday, February 14, 2013 09:38:21 AM Viresh Kumar wrote:
> On Wed, Feb 13, 2013 at 10:08 PM, Dirk Brandewie
> <dirk.brandewie@...il.com> wrote:
> > For the case where both are built-in the load order works my driver uses
> > device_initcall() and acpi_cpufreq uses late_initcall().
> >
> > For the case where both are a module (which I was sure I tested) you are
> > right
> > I will have to do something.
> >
> > For now I propose to make my driver built-in only while I sort out the right
> > solution for the module build.  Does this seem reasonable to everyone?
> 
> Of-course i am missing something here. Why would anybody want to insert
> acpi-cpufreq module when the system supports the pstate driver.
> 
> In case they are mutually exclusive, then we can have something like
> depends on !ACPI-DRIVER in the kconfig option of pstate driver.

Yes.  Or the other way around (i.e. make acpi_cpufreq depend on
!X86_INTEL_PSTATE).

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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