ppc/idle: Add documentation for powersave=off

Update kernel-parameters.txt to add Documentation
for powersave=off.

Signed-off-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index e48c5632bd6c99eaf3111a59f65b641ba6bfd14b..456248b2722056a4a1f144c0cf8b090106cb478a 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3036,6 +3036,12 @@
                        may be specified.
                        Format: <port>,<port>....
 
+       powersave=off   [PPC] This option disables power saving features.
+                       It specifically disables cpuidle and sets the
+                       platform machine description specific power_save
+                       function to NULL. On Idle the CPU just reduces
+                       execution priority.
+
        ppc_strict_facility_enable
                        [PPC] This option catches any kernel floating point,
                        Altivec, VSX and SPE outside of regions specifically