diff --git a/include/linux/writeback.h b/include/linux/writeback.h
index 50c96ee8108f90ed527ec9f7c28abe32420b225a..c78f9f0920b51b61bc8d954438e02eca5b4a6513 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -107,6 +107,8 @@ static inline int wbc_to_write_flags(struct writeback_control *wbc)
 {
 	if (wbc->sync_mode == WB_SYNC_ALL)
 		return REQ_SYNC;
+	else if (wbc->for_kupdate || wbc->for_background)
+		return REQ_BACKGROUND;
 
 	return 0;
 }