2 files changed, 10 insertions, 1 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 322e8048463e..57700038e669 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -33,8 +33,16 @@
  */
 #define PAGE_ALLOC_COSTLY_ORDER 3
 
+#define MIGRATE_UNMOVABLE     0
+#define MIGRATE_MOVABLE       1
+#define MIGRATE_TYPES         2
+
+#define for_each_migratetype_order(order, type) \
+        for (order = 0; order < MAX_ORDER; order++) \
+                for (type = 0; type < MIGRATE_TYPES; type++)
+
 struct free_area {
-        struct list_head        free_list;
+        struct list_head        free_list[MIGRATE_TYPES];
         unsigned long           nr_free;
 };
 
diff --git a/include/linux/pageblock-flags.h b/include/linux/pageblock-flags.h
index 96b623f9b4db..3619d52a425c 100644
--- a/include/linux/pageblock-flags.h
+++ b/include/linux/pageblock-flags.h
@@ -31,6 +31,7 @@
 
 /* Bit indices that affect a whole block of pages */
 enum pageblock_bits {
+        PB_range(PB_migrate, 1), /* 1 bit required for migrate types */
         NR_PAGEBLOCK_BITS
 };