powerpc/cpuidle: Handle power_save=off
This patch makes pseries_idle_driver not to be registered when
power_save=off kernel boot option is specified. The
cpuidle_disable variable used here is similar to
its usage on x86. If cpuidle_disable is set then
sysfs entries for cpuidle framework are not created
and the required drivers are not loaded.
Signed-off-by: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Signed-off-by: Trinabh Gupta <g.trinabh@gmail.com>
Signed-off-by: Arun R Bharadwaj <arun.r.bharadwaj@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/pseries/processor_idle.c b/arch/powerpc/platforms/pseries/processor_idle.c
index f7e3e87..085fd3f 100644
--- a/arch/powerpc/platforms/pseries/processor_idle.c
+++ b/arch/powerpc/platforms/pseries/processor_idle.c
@@ -269,6 +269,9 @@
if (!firmware_has_feature(FW_FEATURE_SPLPAR))
return -ENODEV;
+ if (cpuidle_disable != IDLE_NO_OVERRIDE)
+ return -ENODEV;
+
if (max_idle_state == 0) {
printk(KERN_DEBUG "pseries processor idle disabled.\n");
return -EPERM;