diff --git a/include/linux/sched.h b/include/linux/sched.h
index b99fcd1..8a878b96 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1067,6 +1067,10 @@
 
 struct sched_group;
 
+struct sched_domain_shared {
+	atomic_t	ref;
+};
+
 struct sched_domain {
 	/* These fields must be setup */
 	struct sched_domain *parent;	/* top domain must be null terminated */
@@ -1135,6 +1139,7 @@
 		void *private;		/* used during construction */
 		struct rcu_head rcu;	/* used during destruction */
 	};
+	struct sched_domain_shared *shared;
 
 	unsigned int span_weight;
 	/*
@@ -1168,6 +1173,7 @@
 
 struct sd_data {
 	struct sched_domain **__percpu sd;
+	struct sched_domain_shared **__percpu sds;
 	struct sched_group **__percpu sg;
 	struct sched_group_capacity **__percpu sgc;
 };