diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index fd93566..3d3accb 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -668,7 +668,19 @@
 {
 	int i;
 
-	WARN_ON(bdi_has_dirty_io(bdi));
+	/*
+	 * Splice our entries to the default_backing_dev_info, if this
+	 * bdi disappears
+	 */
+	if (bdi_has_dirty_io(bdi)) {
+		struct bdi_writeback *dst = &default_backing_dev_info.wb;
+
+		spin_lock(&inode_lock);
+		list_splice(&bdi->wb.b_dirty, &dst->b_dirty);
+		list_splice(&bdi->wb.b_io, &dst->b_io);
+		list_splice(&bdi->wb.b_more_io, &dst->b_more_io);
+		spin_unlock(&inode_lock);
+	}
 
 	bdi_unregister(bdi);