The patch titled
Kconfig powernow-k8 driver should depend on ACPI P-States driver
has been added to the -mm tree. Its filename is
kconfig-powernow-k8-driver-should-depend-on-acpi-p-states-driver.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Kconfig powernow-k8 driver should depend on ACPI P-States driver
From: Joshua Hoblitt <jhoblitt@xxxxxxxxxxxxxx>
Below is a one line patch to possibly fix this bug:
http://bugs.gentoo.org/show_bug.cgi?id=178585
http://bugzilla.kernel.org/show_bug.cgi?id=8075
If the kernel is configured with:
CONFIG_X86_POWERNOW_K8=y
CONFIG_X86_ACPI_CPUFREQ=m
Which is currently an allowed configuration, the powernow-k8 driver on
an SMP system will fail with a warning like:
powernow-k8: Found 4 Dual Core AMD Opteron(tm) Processor 285 processors (version 2.00.00)
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
powernow-k8: MP systems not supported by PSB BIOS structure
Which mimics that failure you get when powernow/cool'n'quiet is disabled
in the BIOS. I don't know if this config combination is valid on a
uniprocessor system so this dependency may need to be enforced only if
SMP in enabled. The other powernow-* drivers likely have the same
requirements as -k8 but I am unable to test them.
Signed-off-by: Joshua Hoblitt <jhoblitt@xxxxxxxxxxxxxx>
Cc: Dave Jones <davej@xxxxxxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/i386/kernel/cpu/cpufreq/Kconfig | 1 +
1 files changed, 1 insertion(+)
diff -puN arch/i386/kernel/cpu/cpufreq/Kconfig~kconfig-powernow-k8-driver-should-depend-on-acpi-p-states-driver arch/i386/kernel/cpu/cpufreq/Kconfig
--- a/arch/i386/kernel/cpu/cpufreq/Kconfig~kconfig-powernow-k8-driver-should-depend-on-acpi-p-states-driver
+++ a/arch/i386/kernel/cpu/cpufreq/Kconfig
@@ -82,6 +82,7 @@ config X86_POWERNOW_K8
tristate "AMD Opteron/Athlon64 PowerNow!"
select CPU_FREQ_TABLE
depends on EXPERIMENTAL
+ depends on X86_ACPI_CPUFREQ
help
This adds the CPUFreq driver for mobile AMD Opteron/Athlon64 processors.
_
Patches currently in -mm which might be from jhoblitt@xxxxxxxxxxxxxx are
kconfig-powernow-k8-driver-should-depend-on-acpi-p-states-driver.patch
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