From: Greg Banks <gnb@melbourne.sgi.com>

cpumask: add highest_possible_node_id(), analogous to
highest_possible_processor_id().

Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---


diff -puN include/linux/nodemask.h~cpumask-add-highest_possible_node_id include/linux/nodemask.h
--- a/include/linux/nodemask.h~cpumask-add-highest_possible_node_id
+++ a/include/linux/nodemask.h
@@ -352,6 +352,7 @@ extern nodemask_t node_possible_map;
 #define node_possible(node)	node_isset((node), node_possible_map)
 #define first_online_node	first_node(node_online_map)
 #define next_online_node(nid)	next_node((nid), node_online_map)
+int highest_possible_node_id(void);
 #else
 #define num_online_nodes()	1
 #define num_possible_nodes()	1
@@ -359,6 +360,7 @@ extern nodemask_t node_possible_map;
 #define node_possible(node)	((node) == 0)
 #define first_online_node	0
 #define next_online_node(nid)	(MAX_NUMNODES)
+#define highest_possible_node_id()	0
 #endif
 
 #define any_online_node(mask)			\
diff -puN lib/cpumask.c~cpumask-add-highest_possible_node_id lib/cpumask.c
--- a/lib/cpumask.c~cpumask-add-highest_possible_node_id
+++ a/lib/cpumask.c
@@ -43,3 +43,19 @@ int __any_online_cpu(const cpumask_t *ma
 	return cpu;
 }
 EXPORT_SYMBOL(__any_online_cpu);
+
+#if MAX_NUMNODES > 1
+/*
+ * Find the highest possible node id.
+ */
+int highest_possible_node_id(void)
+{
+	unsigned int node;
+	unsigned int highest = 0;
+
+	for_each_cpu_mask(node, node_possible_map)
+		highest = node;
+	return highest;
+}
+EXPORT_SYMBOL(highest_possible_node_id);
+#endif
_