Index: linux-2.6.17-mm3/include/linux/mmzone.h
===================================================================
--- linux-2.6.17-mm3.orig/include/linux/mmzone.h	2006-06-28 12:59:04.162961405 -0700
+++ linux-2.6.17-mm3/include/linux/mmzone.h	2006-06-28 13:09:32.598655012 -0700
@@ -143,7 +143,10 @@ struct per_cpu_pageset {
 struct zone {
 	/* Fields commonly accessed by the page allocator */
 	unsigned long		free_pages;
-	unsigned long		pages_min, pages_low, pages_high;
+	unsigned long		pages_min, pages_low
+#ifdef CONFIG_HIGHMEM
+	unsigned long		pages_high;
+#endif
 	/*
 	 * We don't know if the memory that we're going to allocate will be freeable
 	 * or/and it will be released eventually, so to avoid totally wasting several