1 files changed, 1 insertions, 0 deletions

diff --git a/mm/filemap.c b/mm/filemap.c
index 79f24a969cb4..920366399eed 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -25,6 +25,7 @@
 #include <linux/uio.h>
 #include <linux/hash.h>
 #include <linux/writeback.h>
+#include <linux/backing-dev.h>
 #include <linux/pagevec.h>
 #include <linux/blkdev.h>
 #include <linux/security.h>