commit 89fa30242facca249aead2aac03c4c69764f911c
author Christoph Lameter <clameter@sgi.com> Mon Sep 25 23:31:55 2006 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> Tue Sep 26 08:48:52 2006 -0700
tree 1ac46b4777b819f2a4793d8e37330576ae5089ec
parent 4415cc8df630b05d3a54267d5f3e5c0b63a4ec05

[PATCH] NUMA: Add zone_to_nid function

There are many places where we need to determine the node of a zone.
Currently we use a difficult to read sequence of pointer dereferencing.
Put that into an inline function and use throughout VM.  Maybe we can find
a way to optimize the lookup in the future.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

mm/hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 3aceadc..7c7d03d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -72,7 +72,7 @@
 	struct zone **z;
 
 	for (z = zonelist->zones; *z; z++) {
-		nid = (*z)->zone_pgdat->node_id;
+		nid = zone_to_nid(*z);
 		if (cpuset_zone_allowed(*z, GFP_HIGHUSER) &&
 		    !list_empty(&hugepage_freelists[nid]))
 			break;