diff --git a/include/linux/bio.h b/include/linux/bio.h
index ec255f282994..cffd5eba401e 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -69,14 +69,6 @@ static inline bool bio_no_advance_iter(const struct bio *bio)
 	       bio_op(bio) == REQ_OP_WRITE_ZEROES;
 }
 
-static inline unsigned int bio_cur_bytes(struct bio *bio)
-{
-	if (bio_has_data(bio))
-		return bio_iovec(bio).bv_len;
-	else /* dataless requests such as discard */
-		return bio->bi_iter.bi_size;
-}
-
 static inline void *bio_data(struct bio *bio)
 {
 	if (bio_has_data(bio))
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 0e941f217578..2219e9277118 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -927,7 +927,11 @@ static inline unsigned int blk_rq_bytes(const struct request *rq)
 
 static inline int blk_rq_cur_bytes(const struct request *rq)
 {
-	return rq->bio ? bio_cur_bytes(rq->bio) : 0;
+	if (!rq->bio)
+		return 0;
+	if (!bio_has_data(rq->bio))	/* dataless requests such as discard */
+		return rq->bio->bi_iter.bi_size;
+	return bio_iovec(rq->bio).bv_len;
 }
 
 unsigned int blk_rq_err_bytes(const struct request *rq);