1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 543f9e411563..eb42c1277023 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -47,6 +47,9 @@ struct zone_padding {
 #endif
 
 enum zone_stat_item {
+        NR_FILE_MAPPED, /* mapped into pagetables.
+                           only modified from process context */
+
         NR_VM_ZONE_STAT_ITEMS };
 
 struct per_cpu_pages {