X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=mm%2Fmmzone.c;h=f5b7d1760213e53db3c46e84dde56daf219ea0cd;hb=1668bfd5be9d8a52536c4865000fbbe065a3613b;hp=0959ee1a4795e65b3dba523770b0d2ea4033baca;hpb=6ab3d5624e172c553004ecc862bfeac16d9d68b7;p=safe%2Fjmp%2Flinux-2.6

diff --git a/mm/mmzone.c b/mm/mmzone.c
index 0959ee1..f5b7d17 100644
--- a/mm/mmzone.c
+++ b/mm/mmzone.c
@@ -6,6 +6,7 @@
 
 
 #include <linux/stddef.h>
+#include <linux/mm.h>
 #include <linux/mmzone.h>
 #include <linux/module.h>
 
@@ -14,8 +15,6 @@ struct pglist_data *first_online_pgdat(void)
 	return NODE_DATA(first_online_node);
 }
 
-EXPORT_SYMBOL(first_online_pgdat);
-
 struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
 {
 	int nid = next_online_node(pgdat->node_id);
@@ -24,8 +23,6 @@ struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
 		return NULL;
 	return NODE_DATA(nid);
 }
-EXPORT_SYMBOL(next_online_pgdat);
-
 
 /*
  * next_zone - helper magic for for_each_zone()
@@ -45,5 +42,48 @@ struct zone *next_zone(struct zone *zone)
 	}
 	return zone;
 }
-EXPORT_SYMBOL(next_zone);
 
+static inline int zref_in_nodemask(struct zoneref *zref, nodemask_t *nodes)
+{
+#ifdef CONFIG_NUMA
+	return node_isset(zonelist_node_idx(zref), *nodes);
+#else
+	return 1;
+#endif /* CONFIG_NUMA */
+}
+
+/* Returns the next zone at or below highest_zoneidx in a zonelist */
+struct zoneref *next_zones_zonelist(struct zoneref *z,
+					enum zone_type highest_zoneidx,
+					nodemask_t *nodes,
+					struct zone **zone)
+{
+	/*
+	 * Find the next suitable zone to use for the allocation.
+	 * Only filter based on nodemask if it's set
+	 */
+	if (likely(nodes == NULL))
+		while (zonelist_zone_idx(z) > highest_zoneidx)
+			z++;
+	else
+		while (zonelist_zone_idx(z) > highest_zoneidx ||
+				(z->zone && !zref_in_nodemask(z, nodes)))
+			z++;
+
+	*zone = zonelist_zone(z);
+	return z;
+}
+
+#ifdef CONFIG_ARCH_HAS_HOLES_MEMORYMODEL
+int memmap_valid_within(unsigned long pfn,
+					struct page *page, struct zone *zone)
+{
+	if (page_to_pfn(page) != pfn)
+		return 0;
+
+	if (page_zone(page) != zone)
+		return 0;
+
+	return 1;
+}
+#endif /* CONFIG_ARCH_HAS_HOLES_MEMORYMODEL */