X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;ds=sidebyside;f=mm%2Fpage-writeback.c;h=9f45f87a585959c3cd6b56a4a6d70065302f3b39;hb=5721949c486705f6a5ba4fc6d2b73f3bb8456149;hp=d013dba21429f2e1fcba4d8321a119baa617fb1c;hpb=dc2acd78c1488bc228ee335dee311ec6caab26e8;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index d013dba..9f45f87 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1324,9 +1324,9 @@ static inline void bdi_dirty_limits(struct backing_dev_info *bdi,
 	*bdi_thresh = bdi_dirty_limit(bdi, dirty_thresh);
 
 	if (bdi_bg_thresh)
-		*bdi_bg_thresh = div_u64((u64)*bdi_thresh *
-					 background_thresh,
-					 dirty_thresh);
+		*bdi_bg_thresh = dirty_thresh ? div_u64((u64)*bdi_thresh *
+							background_thresh,
+							dirty_thresh) : 0;
 
 	/*
 	 * In order to avoid the stacked BDI deadlock we need