1 files changed, 7 insertions, 1 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 15ab3e039535..3d95c480f58d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -680,8 +680,14 @@ struct sched_group {
         /*
          * CPU power of this group, SCHED_LOAD_SCALE being max power for a
          * single CPU. This is read only (except for setup, hotplug CPU).
+         * Note : Never change cpu_power without recompute its reciprocal
          */
-        unsigned long cpu_power;
+        unsigned int __cpu_power;
+        /*
+         * reciprocal value of cpu_power to avoid expensive divides
+         * (see include/linux/reciprocal_div.h)
+         */
+        u32 reciprocal_cpu_power;
 };
 
 struct sched_domain {