[PATCH] update vm_total_pages at memory hotadd

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 1b1ac3d..841a077 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -160,6 +160,6 @@
 
 	if (need_zonelists_rebuild)
 		build_all_zonelists();
-
+	vm_total_pages = nr_free_pagecache_pages();
 	return 0;
 }