diff --git a/[refs] b/[refs]
index 56dcf0280f9b..4b5767b5cb0f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2b934c6236983392d01bef22e43af3051cac16f5
+refs/heads/master: ccb6108f5b0b541d3eb332c3a73e645c0f84278e
diff --git a/trunk/mm/backing-dev.c b/trunk/mm/backing-dev.c
index f032e6e1e09a..e56fe35cef05 100644
--- a/trunk/mm/backing-dev.c
+++ b/trunk/mm/backing-dev.c
@@ -606,6 +606,7 @@ static void bdi_prune_sb(struct backing_dev_info *bdi)
 void bdi_unregister(struct backing_dev_info *bdi)
 {
 	if (bdi->dev) {
+		bdi_set_min_ratio(bdi, 0);
 		trace_writeback_bdi_unregister(bdi);
 		bdi_prune_sb(bdi);
 		del_timer_sync(&bdi->wb.wakeup_timer);