From: Keith Mannthey <kmannth@us.ibm.com>

The api for hot-add memory already has a construct for finding nodes based on
an address, memory_add_physaddr_to_nid.  This patch allows the fucntion to do
something besides return 0.  It uses the nodes_add infomation to lookup to
node info for a hot add event.

Signed-off-by: Keith Mannthey<kmannth@us.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---


diff -puN arch/x86_64/mm/init.c~hot-add-mem-x86_64-use-config_memory_hotplug_reserve arch/x86_64/mm/init.c
--- a/arch/x86_64/mm/init.c~hot-add-mem-x86_64-use-config_memory_hotplug_reserve
+++ a/arch/x86_64/mm/init.c
@@ -555,6 +555,13 @@ int memory_add_physaddr_to_nid(u64 start
 }
 #endif
 
+#ifndef CONFIG_ACPI_NUMA
+int memory_add_physaddr_to_nid(u64 start)
+{
+	return 0;
+}
+#endif
+
 #else /* CONFIG_MEMORY_HOTPLUG */
 /*
  * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance,
_