1 files changed, 4 insertions, 1 deletions

diff --git a/mm/rmap.c b/mm/rmap.c
index c9ccc1a72dc3..836c6c63e1f2 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -703,8 +703,10 @@ void page_add_new_anon_rmap(struct page *page,
  */
 void page_add_file_rmap(struct page *page)
 {
-        if (atomic_inc_and_test(&page->_mapcount))
+        if (atomic_inc_and_test(&page->_mapcount)) {
                 __inc_zone_page_state(page, NR_FILE_MAPPED);
+                mem_cgroup_update_mapped_file_stat(page, 1);
+        }
 }
 
 #ifdef CONFIG_DEBUG_VM
@@ -753,6 +755,7 @@ void page_remove_rmap(struct page *page)
                         mem_cgroup_uncharge_page(page);
                 __dec_zone_page_state(page,
                         PageAnon(page) ? NR_ANON_PAGES : NR_FILE_MAPPED);
+                mem_cgroup_update_mapped_file_stat(page, -1);
                 /*
                  * It would be tidy to reset the PageAnon mapping here,
                  * but that might overwrite a racing page_add_anon_rmap