[patch] fix unused setup_nr_node_ids

This is now the only (!) compiler warning I get in my UML build :)

----
From: Miklos Szeredi <[email protected]>

mm/page_alloc.c:931: warning: 'setup_nr_node_ids' defined but not used

Signed-off-by: Miklos Szeredi <[email protected]>
---

Index: linux/mm/page_alloc.c
===================================================================
--- linux.orig/mm/page_alloc.c	2007-04-26 13:07:11.000000000 +0200
+++ linux/mm/page_alloc.c	2007-04-26 13:07:12.000000000 +0200
@@ -914,7 +914,10 @@ static int rmqueue_bulk(struct zone *zon
 #if MAX_NUMNODES > 1
 int nr_node_ids __read_mostly = MAX_NUMNODES;
 EXPORT_SYMBOL(nr_node_ids);
+#endif
 
+#ifdef CONFIG_ARCH_POPULATES_NODE_MAP
+#if MAX_NUMNODES > 1
 /*
  * Figure out the number of possible node ids.
  */
@@ -930,6 +933,7 @@ static void __init setup_nr_node_ids(voi
 #else
 static void __init setup_nr_node_ids(void) {}
 #endif
+#endif
 
 #ifdef CONFIG_NUMA
 /*
Index: linux/drivers/base/core.c
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