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Subject[PATCH] cpufreq/intel_pstate: Change to disallow module build
From: Dirk Brandewie <>

Load order is important in order for intel_pstate to take over as the
default scaling driver from acpi-cpufreq.

If both are built-in acpi-cpufreq uses late_initcall() and
intel_pstate uses device_initcall() so it will be able to register as
the scaling before acpi-cpufreq for the processors supported by

If acpi-cpufreq is built as a module then intel_pstate still gets
first option to become the scaling driver.

Signed-off-by: Dirk Brandewie <>
drivers/cpufreq/Kconfig.x86 | 7 +------
1 files changed, 1 insertions(+), 6 deletions(-)

diff --git a/drivers/cpufreq/Kconfig.x86 b/drivers/cpufreq/Kconfig.x86
index 6aa7053..98e5abb 100644
--- a/drivers/cpufreq/Kconfig.x86
+++ b/drivers/cpufreq/Kconfig.x86
@@ -3,7 +3,7 @@

- tristate "Intel P state control"
+ bool "Intel P state control"
depends on X86
This driver provides a P state for Intel core processors.
@@ -13,11 +13,6 @@ config X86_INTEL_PSTATE
When this driver is enabled it will become the perferred
scaling driver for Sandy bridge processors.

- Note: This driver should be built with the same settings as
- the other scaling drivers configured into the system
- (module/built-in) in order for the driver to register itself
- as the scaling driver on the system.
If in doubt, say N.

config X86_PCC_CPUFREQ

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