diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index c6fd2c0..569b1f6 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -91,6 +91,9 @@
 static inline void arch_free_nodedata(pg_data_t *pgdat)
 {
 }
+static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+}
 
 #else /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
 
@@ -114,6 +117,12 @@
  */
 #define generic_free_nodedata(pgdat)	kfree(pgdat)
 
+extern pg_data_t *node_data[];
+static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+	node_data[nid] = pgdat;
+}
+
 #else /* !CONFIG_NUMA */
 
 /* never called */
@@ -125,6 +134,9 @@
 static inline void generic_free_nodedata(pg_data_t *pgdat)
 {
 }
+static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
+{
+}
 #endif /* CONFIG_NUMA */
 #endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */