3 files changed, 17 insertions, 9 deletions

diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h
index 3b6723d..895bc4e 100644
--- a/include/linux/mm_inline.h
+++ b/include/linux/mm_inline.h
@@ -1,30 +1,29 @@
-
 static inline void
 add_page_to_active_list(struct zone *zone, struct page *page)
 {
 	list_add(&page->lru, &zone->active_list);
-	zone->nr_active++;
+	__inc_zone_state(zone, NR_ACTIVE);
 }
 
 static inline void
 add_page_to_inactive_list(struct zone *zone, struct page *page)
 {
 	list_add(&page->lru, &zone->inactive_list);
-	zone->nr_inactive++;
+	__inc_zone_state(zone, NR_INACTIVE);
 }
 
 static inline void
 del_page_from_active_list(struct zone *zone, struct page *page)
 {
 	list_del(&page->lru);
-	zone->nr_active--;
+	__dec_zone_state(zone, NR_ACTIVE);
 }
 
 static inline void
 del_page_from_inactive_list(struct zone *zone, struct page *page)
 {
 	list_del(&page->lru);
-	zone->nr_inactive--;
+	__dec_zone_state(zone, NR_INACTIVE);
 }
 
 static inline void
@@ -33,9 +32,9 @@ del_page_from_lru(struct zone *zone, struct page *page)
 	list_del(&page->lru);
 	if (PageActive(page)) {
 		__ClearPageActive(page);
-		zone->nr_active--;
+		__dec_zone_state(zone, NR_ACTIVE);
 	} else {
-		zone->nr_inactive--;
+		__dec_zone_state(zone, NR_INACTIVE);
 	}
 }
 
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index b262f47..9137d1b 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -47,6 +47,8 @@ struct zone_padding {
 #endif
 
 enum zone_stat_item {
+	NR_INACTIVE,
+	NR_ACTIVE,
 	NR_ANON_PAGES,	/* Mapped anonymous pages */
 	NR_FILE_MAPPED,	/* pagecache pages mapped into pagetables.
 			   only modified from process context */
@@ -197,8 +199,6 @@ struct zone {
 	struct list_head	inactive_list;
 	unsigned long		nr_scan_active;
 	unsigned long		nr_scan_inactive;
-	unsigned long		nr_active;
-	unsigned long		nr_inactive;
 	unsigned long		pages_scanned;	   /* since last reclaim */
 	int			all_unreclaimable; /* All pages pinned */
 
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 5e9803e..c8d55bc 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -186,6 +186,9 @@ void inc_zone_page_state(struct page *, enum zone_stat_item);
 void dec_zone_page_state(struct page *, enum zone_stat_item);
 
 extern void inc_zone_state(struct zone *, enum zone_stat_item);
+extern void __inc_zone_state(struct zone *, enum zone_stat_item);
+extern void dec_zone_state(struct zone *, enum zone_stat_item);
+extern void __dec_zone_state(struct zone *, enum zone_stat_item);
 
 void refresh_cpu_vm_stats(int);
 void refresh_vm_stats(void);
@@ -214,6 +217,12 @@ static inline void __inc_zone_page_state(struct page *page,
 	__inc_zone_state(page_zone(page), item);
 }
 
+static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
+{
+	atomic_long_dec(&zone->vm_stat[item]);
+	atomic_long_dec(&vm_stat[item]);
+}
+
 static inline void __dec_zone_page_state(struct page *page,
 			enum zone_stat_item item)
 {