43 lines
1.8 KiB
Diff
43 lines
1.8 KiB
Diff
From 4358b17e5f47fc4b999796c3593a865a8e41507a Mon Sep 17 00:00:00 2001
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Message-Id: <4358b17e5f47fc4b999796c3593a865a8e41507a.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Thu, 9 Apr 2015 15:23:01 +0200
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Subject: [PATCH 054/333] cpufreq: drop K8's driver from beeing selected
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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Ralf posted a picture of a backtrace from
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| powernowk8_target_fn() -> transition_frequency_fidvid() and then at the
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| end:
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| 932 policy = cpufreq_cpu_get(smp_processor_id());
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| 933 cpufreq_cpu_put(policy);
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crashing the system on -RT. I assumed that policy was a NULL pointer but
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was rulled out. Since Ralf can't do any more investigations on this and
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I have no machine with this, I simply switch it off.
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Reported-by: Ralf Mardorf <ralf.mardorf@alice-dsl.net>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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drivers/cpufreq/Kconfig.x86 | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
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index 35f71825b7f3..bb4a6160d0f7 100644
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--- a/drivers/cpufreq/Kconfig.x86
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+++ b/drivers/cpufreq/Kconfig.x86
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@@ -125,7 +125,7 @@ config X86_POWERNOW_K7_ACPI
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config X86_POWERNOW_K8
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tristate "AMD Opteron/Athlon64 PowerNow!"
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- depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ
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+ depends on ACPI && ACPI_PROCESSOR && X86_ACPI_CPUFREQ && !PREEMPT_RT_BASE
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help
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This adds the CPUFreq driver for K8/early Opteron/Athlon64 processors.
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Support for K10 and newer processors is now in acpi-cpufreq.
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--
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2.17.1
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