[PATCH] bio_endio() increments bio->bi_sector

increment bi_sector in bio_endio() so make_request_fn drivers don't
have to do this accounting themselves.

fs/bio.c

@@ -728,6 +728,7 @@ void bio_endio(struct bio *bio, unsigned int bytes_done, int error)
 	}
 
 	bio->bi_size -= bytes_done;
+	bio->bi_sector += (bytes_done >> 9);
 
 	if (bio->bi_end_io)
 		bio->bi_end_io(bio, bytes_done, error);