raid5: remove raid5_build_block

Now raid5_build_block is just called to set the
sector of r5dev, raid5_compute_blocknr can be
used directly for the purpose.
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>

drivers/md/raid5.c

@@ -494,7 +494,6 @@ static int grow_buffers(struct stripe_head *sh, gfp_t gfp)
 	return 0;
 }
 
-static void raid5_build_block(struct stripe_head *sh, int i, int previous);
 static void stripe_set_idx(sector_t stripe, struct r5conf *conf, int previous,
 			    struct stripe_head *sh);
 
@@ -530,7 +529,7 @@ static void init_stripe(struct stripe_head *sh, sector_t sector, int previous)
 			WARN_ON(1);
 		}
 		dev->flags = 0;
-		raid5_build_block(sh, i, previous);
+		dev->sector = raid5_compute_blocknr(sh, i, previous);
 	}
 	if (read_seqcount_retry(&conf->gen_lock, seq))
 		goto retry;
@@ -2662,14 +2661,6 @@ static void raid5_end_write_request(struct bio *bi)
 		raid5_release_stripe(sh->batch_head);
 }
 
-static void raid5_build_block(struct stripe_head *sh, int i, int previous)
-{
-	struct r5dev *dev = &sh->dev[i];
-
-	dev->flags = 0;
-	dev->sector = raid5_compute_blocknr(sh, i, previous);
-}
-
 static void raid5_error(struct mddev *mddev, struct md_rdev *rdev)
 {
 	char b[BDEVNAME_SIZE];