9p: add bdi backing to mount session

This ensures that dirty data gets flushed properly.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index a0a8d3dd1361..bec4d0bcb458 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -20,6 +20,7 @@
  *  Boston, MA  02111-1301  USA
  *
  */
+#include <linux/backing-dev.h>
 
 /**
  * enum p9_session_flags - option flags for each 9P session
@@ -102,6 +103,7 @@ struct v9fs_session_info {
         u32 uid;                /* if ACCESS_SINGLE, the uid that has access */
         struct p9_client *clnt; /* 9p client */
         struct list_head slist; /* list of sessions registered with v9fs */
+        struct backing_dev_info bdi;
 };
 
 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,