linux-kernel - [PATCH 4/5] cpufreq: Add compatibility hack to powernow-k8

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Message-Id: <1305651819-25660-4-git-send-email-mjg@redhat.com>
Date:	Tue, 17 May 2011 13:03:38 -0400
From:	Matthew Garrett <mjg@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	borislav.petkov@....com, davej@...hat.com, mark.langsdorf@....com,
	cpufreq@...r.kernel.org, Matthew Garrett <mjg@...hat.com>
Subject: [PATCH 4/5] cpufreq: Add compatibility hack to powernow-k8

cpufreq modules are often loaded from init scripts that assume that all
recent AMD systems will use powernow-k8, so we should ensure that loading
it triggers a load of acpi-cpufreq if the latter is built as a module.
This avoids the problem of users ending up without any cpufreq support
after the transition.

Signed-off-by: Matthew Garrett <mjg@...hat.com>
---
 arch/x86/kernel/cpu/cpufreq/powernow-k8.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 2368e38..619733e 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1538,6 +1538,8 @@ static int __cpuinit powernowk8_init(void)
 	unsigned int i, supported_cpus = 0, cpu;
 	int rv;
 
+	request_module("acpi_cpufreq");
+
 	for_each_online_cpu(i) {
 		int rc;
 		smp_call_function_single(i, check_supported_cpu, &rc, 1);
-- 
1.7.5

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