[PATCH] fix allocate_pgdat comments

From: "Martin J. Bligh" <mbligh@aracnet.com>

From: Andy Whitcroft <apw@shadowen.org>

The comments for i386 allocate_pgdat indicate that the routine should be
modified to place the pgdat into node local memory.  However, this has
already been done as the pgdat is placed at node_remap_start_vaddr.  This
patch updates the comments to reflect this reality.
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Martin J. Bligh <mbligh@aracnet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/mm/discontig.c

@@ -129,8 +129,11 @@ static void __init find_max_pfn_node(int nid)
 }
 
 /* 
- * Allocate memory for the pg_data_t via a crude pre-bootmem method
- * We ought to relocate these onto their own node later on during boot.
+ * Allocate memory for the pg_data_t for this node via a crude pre-bootmem
+ * method.  For node zero take this from the bottom of memory, for
+ * subsequent nodes place them at node_remap_start_vaddr which contains
+ * node local data in physically node local memory.  See setup_memory()
+ * for details.
  */
 static void __init allocate_pgdat(int nid)
 {