2.6.16-rc5-mm1 memory-hotplug compile fix

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

Because zone_mem_map is removed, this warning appers at compile time.

include/linux/memory_hotplug.h:53: warning: 'struct page' declared inside parameter list

If CONFIG_FLAT_NODE_MEM_MAP==n (means CONFIG_FLATMEM || CONFIG_DISCONTIGMEM),
node_mem_map doesn't exist either. So this happens.

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Index: testtree/include/linux/memory_hotplug.h
===================================================================
--- testtree.orig/include/linux/memory_hotplug.h
+++ testtree/include/linux/memory_hotplug.h
@@ -7,6 +7,7 @@
 #include <linux/notifier.h>
 
 #ifdef CONFIG_MEMORY_HOTPLUG
+struct page;
 /*
  * pgdat resizing functions
  */
-
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