[PATCH 01/17] block: introduce bio_segments_all()

[Ming Lei]

So that we can replace the direct access to .bi_vcnt.

Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
 include/linux/bio.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/bio.h b/include/linux/bio.h
index 8e521194f6fc..3364b3ed90e7 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -293,6 +293,13 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv)
 		bv->bv_len = iter.bi_bvec_done;
 }
 
+static inline unsigned bio_segments_all(struct bio *bio)
+{
+	WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED));
+
+	return bio->bi_vcnt;
+}
+
 enum bip_flags {
 	BIP_BLOCK_INTEGRITY	= 1 << 0, /* block layer owns integrity data */
 	BIP_MAPPED_INTEGRITY	= 1 << 1, /* ref tag has been remapped */
-- 
2.7.4