linux-kernel - [ 38/46] powernow-k8: Add a kconfig dependency on acpi-cpufreq

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Message-Id: <20130124211149.894759583@linuxfoundation.org>
Date:	Thu, 24 Jan 2013 13:13:16 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	alan@...rguk.ukuu.org.uk, Andreas <linuxuser330250@....net>,
	Borislav Petkov <bp@...e.de>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: [ 38/46] powernow-k8: Add a kconfig dependency on acpi-cpufreq

3.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Borislav Petkov <bp@...e.de>

commit 631e8ac18fd59722e7ceb15fceeef3f368c250f9 upstream.

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.

References: https://bugzilla.kernel.org/show_bug.cgi?id=51741
Reported-by: Andreas <linuxuser330250@....net>
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/cpufreq/Kconfig.x86 |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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.

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