[PATCH V5 11/33] block: implement bio_pages_all() via bio_for_each_page_all()
From: Ming Lei <hidden>
Date: 2018-05-24 09:01:16
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
As multipage bvec will be enabled soon, bio->bi_vcnt isn't same with page count in the bio any more, so use bio_for_each_page_all() to compute the number. Signed-off-by: Ming Lei <redacted> --- include/linux/bio.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 3d3795b9a353..08af9272687f 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h@@ -334,8 +334,14 @@ static inline void bio_get_last_bvec(struct bio *bio, struct bio_vec *bv) static inline unsigned bio_pages_all(struct bio *bio) { + unsigned i; + struct bio_vec *bv; + WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)); - return bio->bi_vcnt; + + bio_for_each_page_all(bv, bio, i) + ; + return i; } static inline struct bio_vec *bio_first_bvec_all(struct bio *bio)
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2.9.5