diff --git a/block/bio.c b/block/bio.c
index c89e402356a592c7a0652889bb6c8ceb42d91ecd..d5120451c36a3a14cfec010c2b8d77cd4d2fba31 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -546,7 +546,7 @@ EXPORT_SYMBOL(zero_fill_bio);
  *   REQ_OP_READ, zero the truncated part. This function should only
  *   be used for handling corner cases, such as bio eod.
  */
-void bio_truncate(struct bio *bio, unsigned new_size)
+static void bio_truncate(struct bio *bio, unsigned new_size)
 {
 	struct bio_vec bv;
 	struct bvec_iter iter;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 4c5106f2ed57ef9aa6a7cf0caa457b369ab840f3..d8d27742a75f99f41d5ffdd3ed902d00cf41a17c 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -405,7 +405,6 @@ extern void bio_copy_data_iter(struct bio *dst, struct bvec_iter *dst_iter,
 			       struct bio *src, struct bvec_iter *src_iter);
 extern void bio_copy_data(struct bio *dst, struct bio *src);
 extern void bio_free_pages(struct bio *bio);
-void bio_truncate(struct bio *bio, unsigned new_size);
 void guard_bio_eod(struct bio *bio);
 void zero_fill_bio(struct bio *bio);