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authorHarald Welte <HaraldWelte@viatech.com>2009-06-08 14:29:36 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-11 02:22:44 +0400
commit0fea615e526b4b7eff0363ee02d5753e5f924089 (patch)
tree306e87e03c0529eec05b6a481241057edf18b0ff
parent0de51088e6a82bc8413d3ca9e28bbca2788b5b53 (diff)
downloadlinux-0fea615e526b4b7eff0363ee02d5753e5f924089.tar.xz
CPUFREQ: Mark e_powersaver driver as EXPERIMENTAL and DANGEROUS
The e_powersaver driver for VIA's C7 CPU's needs to be marked as DANGEROUS as it configures the CPU to power states that are out of specification. According to Centaur, all systems with C7 and Nano CPU's support the ACPI p-state method. Thus, the acpi-cpufreq driver should be used instead. Signed-off-by: Harald Welte <HaraldWelte@viatech.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/x86/kernel/cpu/cpufreq/Kconfig9
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/Kconfig b/arch/x86/kernel/cpu/cpufreq/Kconfig
index 52c839875478..f138c6c389b9 100644
--- a/arch/x86/kernel/cpu/cpufreq/Kconfig
+++ b/arch/x86/kernel/cpu/cpufreq/Kconfig
@@ -220,11 +220,14 @@ config X86_LONGHAUL
If in doubt, say N.
config X86_E_POWERSAVER
- tristate "VIA C7 Enhanced PowerSaver"
+ tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
select CPU_FREQ_TABLE
- depends on X86_32
+ depends on X86_32 && EXPERIMENTAL
help
- This adds the CPUFreq driver for VIA C7 processors.
+ This adds the CPUFreq driver for VIA C7 processors. However, this driver
+ does not have any safeguards to prevent operating the CPU out of spec
+ and is thus considered dangerous. Please use the regular ACPI cpufreq
+ driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
If in doubt, say N.