1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 6cbeca45c451..6d66382dae65 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -112,6 +112,27 @@ static const struct attribute_group *node_access_node_groups[] = {
 	NULL,
 };
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+static BLOCKING_NOTIFIER_HEAD(node_chain);
+
+int register_node_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&node_chain, nb);
+}
+EXPORT_SYMBOL(register_node_notifier);
+
+void unregister_node_notifier(struct notifier_block *nb)
+{
+	blocking_notifier_chain_unregister(&node_chain, nb);
+}
+EXPORT_SYMBOL(unregister_node_notifier);
+
+int node_notify(unsigned long val, void *v)
+{
+	return blocking_notifier_call_chain(&node_chain, val, v);
+}
+#endif
+
 static void node_remove_accesses(struct node *node)
 {
 	struct node_access_nodes *c, *cnext;