[PATCH] pgdat allocation for new node add (specify node id)

Change the name of old add_memory() to arch_add_memory.  And use node id to
get pgdat for the node at NODE_DATA().

Note: Powerpc's old add_memory() is defined as __devinit. However,
      add_memory() is usually called only after bootup.
      I suppose it may be redundant. But, I'm not well known about powerpc.
      So, I keep it. (But, __meminit is better at least.)

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: "Brown, Len" <len.brown@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 5652569..0424326e 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -215,6 +215,7 @@
 {
 	int result, num_enabled = 0;
 	struct acpi_memory_info *info;
+	int node = 0;
 
 	ACPI_FUNCTION_TRACE("acpi_memory_enable_device");
 
@@ -245,7 +246,7 @@
 			continue;
 		}
 
-		result = add_memory(info->start_addr, info->length);
+		result = add_memory(node, info->start_addr, info->length);
 		if (result)
 			continue;
 		info->enabled = 1;