1 files changed, 16 insertions, 0 deletions

diff --git a/lib/cpumask.c b/lib/cpumask.c
index 3a67dc5ada7d..7a2a73f88d59 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -43,3 +43,19 @@ int __any_online_cpu(const cpumask_t *mask)
         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_node_mask(node, node_possible_map)
+                highest = node;
+        return highest;
+}
+EXPORT_SYMBOL(highest_possible_node_id);
+#endif