1 files changed, 15 insertions, 1 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 0aa4445b0b8a..dd8487f0442f 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -163,6 +163,17 @@ static inline int is_unevictable_lru(enum lru_list l)
 #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 */
@@ -275,7 +286,10 @@ 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