diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 86980c6..1f7b2c0 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -32,6 +32,7 @@
 };
 
 extern int register_cpu(struct cpu *, int, struct node *);
+extern struct sys_device *get_cpu_sysdev(int cpu);
 #ifdef CONFIG_HOTPLUG_CPU
 extern void unregister_cpu(struct cpu *, struct node *);
 #endif