diff --git a/include/linux/cpu_pm.h b/include/linux/cpu_pm.h
index a165fd7..d399bf8 100644
--- a/include/linux/cpu_pm.h
+++ b/include/linux/cpu_pm.h
@@ -67,7 +67,13 @@
 	CPU_CLUSTER_PM_EXIT,
 };
 
+#ifdef CONFIG_CPU_PM
 int cpu_pm_register_notifier(struct notifier_block *nb);
+#else
+static inline int cpu_pm_register_notifier(struct notifier_block *nb)
+{ return 0; }
+#endif
+
 int cpu_pm_unregister_notifier(struct notifier_block *nb);
 
 /*