[PATCH v3 28/49] block: introduce bvec_get_last_page()
From: Ming Lei <hidden>
Date: 2017-08-08 08:45:27
Also in:
linux-fsdevel, linux-mm, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
BTRFS and guard_bio_eod() need to get the last page, so introduce this helper to make them happy. Signed-off-by: Ming Lei <redacted> --- include/linux/bvec.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 23d3abdf057c..ceb6292750d6 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h@@ -238,4 +238,18 @@ static inline bool bvec_iter_advance_mp(const struct bio_vec *bv, #define bvec_for_each_sp_bvec(sp_bvl, mp_bvec, iter) \ __bvec_for_each_sp_bvec(sp_bvl, mp_bvec, iter, BVEC_ITER_ALL_INIT) +/* + * get the last page from the multipage bvec and store it + * in @sp_bv + */ +static inline void bvec_get_last_page(struct bio_vec *mp_bv, + struct bio_vec *sp_bv) +{ + struct bvec_iter iter; + + *sp_bv = *mp_bv; + bvec_for_each_sp_bvec(*sp_bv, mp_bv, iter) + ; +} + #endif /* __LINUX_BVEC_ITER_H */
--
2.9.4