1 files changed, 17 insertions, 19 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index a47c879e1304..889598537370 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -50,9 +50,6 @@ extern int page_group_by_mobility_disabled;
 
 static inline int get_pageblock_migratetype(struct page *page)
 {
-        if (unlikely(page_group_by_mobility_disabled))
-                return MIGRATE_UNMOVABLE;
-
         return get_pageblock_flags_group(page, PB_migrate, PB_migrate_end);
 }
 
@@ -86,13 +83,8 @@ enum zone_stat_item {
         NR_ACTIVE_ANON,         /*  "     "     "   "       "         */
         NR_INACTIVE_FILE,       /*  "     "     "   "       "         */
         NR_ACTIVE_FILE,         /*  "     "     "   "       "         */
-#ifdef CONFIG_UNEVICTABLE_LRU
         NR_UNEVICTABLE,         /*  "     "     "   "       "         */
         NR_MLOCK,               /* mlock()ed pages found and moved off LRU */
-#else
-        NR_UNEVICTABLE = NR_ACTIVE_FILE, /* avoid compiler errors in dead code */
-        NR_MLOCK = NR_ACTIVE_FILE,
-#endif
         NR_ANON_PAGES,  /* Mapped anonymous pages */
         NR_FILE_MAPPED, /* pagecache pages mapped into pagetables.
                            only modified from process context */
@@ -135,11 +127,7 @@ enum lru_list {
         LRU_ACTIVE_ANON = LRU_BASE + LRU_ACTIVE,
         LRU_INACTIVE_FILE = LRU_BASE + LRU_FILE,
         LRU_ACTIVE_FILE = LRU_BASE + LRU_FILE + LRU_ACTIVE,
-#ifdef CONFIG_UNEVICTABLE_LRU
         LRU_UNEVICTABLE,
-#else
-        LRU_UNEVICTABLE = LRU_ACTIVE_FILE, /* avoid compiler errors in dead code */
-#endif
         NR_LRU_LISTS
 };
 
@@ -159,13 +147,20 @@ static inline int is_active_lru(enum lru_list l)
 
 static inline int is_unevictable_lru(enum lru_list l)
 {
-#ifdef CONFIG_UNEVICTABLE_LRU
         return (l == LRU_UNEVICTABLE);
-#else
-        return 0;
-#endif
 }
 
+enum zone_watermarks {
+        WMARK_MIN,
+        WMARK_LOW,
+        WMARK_HIGH,
+        NR_WMARK
+};
+
+#define min_wmark_pages(z) (z->watermark[WMARK_MIN])
+#define low_wmark_pages(z) (z->watermark[WMARK_LOW])
+#define high_wmark_pages(z) (z->watermark[WMARK_HIGH])
+
 struct per_cpu_pages {
         int count;              /* number of pages in the list */
         int high;               /* high watermark, emptying needed */
@@ -278,7 +273,10 @@ struct zone_reclaim_stat {
 
 struct zone {
         /* Fields commonly accessed by the page allocator */
-        unsigned long           pages_min, pages_low, pages_high;
+
+        /* zone watermarks, access with *_wmark_pages(zone) macros */
+        unsigned long watermark[NR_WMARK];
+
         /*
          * 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
@@ -323,9 +321,9 @@ struct zone {
 
         /* Fields commonly accessed by the page reclaim scanner */
         spinlock_t              lru_lock;       
-        struct {
+        struct zone_lru {
                 struct list_head list;
-                unsigned long nr_scan;
+                unsigned long nr_saved_scan;    /* accumulated for batching */
         } lru[NR_LRU_LISTS];
 
         struct zone_reclaim_stat reclaim_stat;