1 files changed, 16 insertions, 3 deletions

diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 848025cd7087..829b94b156f2 100644
--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -408,6 +408,19 @@ static inline int num_node_state(enum node_states state)
 #define next_online_node(nid)   next_node((nid), node_states[N_ONLINE])
 
 extern int nr_node_ids;
+extern int nr_online_nodes;
+
+static inline void node_set_online(int nid)
+{
+        node_set_state(nid, N_ONLINE);
+        nr_online_nodes = num_node_state(N_ONLINE);
+}
+
+static inline void node_set_offline(int nid)
+{
+        node_clear_state(nid, N_ONLINE);
+        nr_online_nodes = num_node_state(N_ONLINE);
+}
 #else
 
 static inline int node_state(int node, enum node_states state)
@@ -434,7 +447,10 @@ static inline int num_node_state(enum node_states state)
 #define first_online_node       0
 #define next_online_node(nid)   (MAX_NUMNODES)
 #define nr_node_ids             1
+#define nr_online_nodes         1
 
+#define node_set_online(node)      node_set_state((node), N_ONLINE)
+#define node_set_offline(node)     node_clear_state((node), N_ONLINE)
 #endif
 
 #define node_online_map         node_states[N_ONLINE]
@@ -454,9 +470,6 @@ static inline int num_node_state(enum node_states state)
 #define node_online(node)       node_state((node), N_ONLINE)
 #define node_possible(node)     node_state((node), N_POSSIBLE)
 
-#define node_set_online(node)      node_set_state((node), N_ONLINE)
-#define node_set_offline(node)     node_clear_state((node), N_ONLINE)
-
 #define for_each_node(node)        for_each_node_state(node, N_POSSIBLE)
 #define for_each_online_node(node) for_each_node_state(node, N_ONLINE)