From: Christoph Lameter <clameter@sgi.com>

Need #ifdef CONFIG_NUMA since node field is only defined for NUMA

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

 include/linux/mm.h |    4 ++++
 1 files changed, 4 insertions(+)

diff -puN include/linux/mm.h~add-node-to-zone-for-the-numa-case-fix include/linux/mm.h
--- a/include/linux/mm.h~add-node-to-zone-for-the-numa-case-fix
+++ a/include/linux/mm.h
@@ -446,7 +446,11 @@ static inline struct zone *page_zone(str
 
 static inline unsigned long zone_to_nid(struct zone *zone)
 {
+#ifdef CONFIG_NUMA
 	return zone->node;
+#else
+	return 0;
+#endif
 }
 
 static inline unsigned long page_to_nid(struct page *page)
_