Fix a build error when BLOCK=n
mm/filemap.c: In function '__filemap_fdatawrite_range':
mm/filemap.c:200: error: implicit declaration of function
'mapping_cap_writeback_dirty'
This happens when we don't use/have any block devices and a NFS root
filesystem is used.
mapping_cap_writeback_dirty() is defined in linux/backing-dev.h which
used to be provided in mm/filemap.c by linux/blkdev.h until commit
f5ff8422bbdd59f8c1f699df248e1b7a11073027 (Fix warnings with
!CONFIG_BLOCK).
Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/mm/filemap.c b/mm/filemap.c
index 5209e47..7c86436 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -28,6 +28,7 @@
#include <linux/backing-dev.h>
#include <linux/pagevec.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/security.h>
#include <linux/syscalls.h>
#include <linux/cpuset.h>