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authorHarald Welte <HaraldWelte@viatech.com>2009-06-08 06:29:36 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-10 18:22:44 -0400
commit0fea615e526b4b7eff0363ee02d5753e5f924089 (patch)
tree306e87e03c0529eec05b6a481241057edf18b0ff /arch/x86/kernel/cpu/cpufreq/Kconfig
parent0de51088e6a82bc8413d3ca9e28bbca2788b5b53 (diff)
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>
Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/Kconfig')
-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
220 If in doubt, say N. 220 If in doubt, say N.
221 221
222config X86_E_POWERSAVER 222config X86_E_POWERSAVER
223 tristate "VIA C7 Enhanced PowerSaver" 223 tristate "VIA C7 Enhanced PowerSaver (DANGEROUS)"
224 select CPU_FREQ_TABLE 224 select CPU_FREQ_TABLE
225 depends on X86_32 225 depends on X86_32 && EXPERIMENTAL
226 help 226 help
227 This adds the CPUFreq driver for VIA C7 processors. 227 This adds the CPUFreq driver for VIA C7 processors. However, this driver
228 does not have any safeguards to prevent operating the CPU out of spec
229 and is thus considered dangerous. Please use the regular ACPI cpufreq
230 driver, enabled by CONFIG_X86_ACPI_CPUFREQ.
228 231
229 If in doubt, say N. 232 If in doubt, say N.
230 233