BTRFS need to get the last singlepage bvec, so introduce
this helper to make it happy.
Signed-off-by: Ming Lei <tom.leiming@xxxxxxxxx>
---
include/linux/bvec.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index baf379d56106..e9a623067c52 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -206,4 +206,14 @@ static inline void 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 singlepage bvec from the multipage bvec */
+static inline void bvec_get_last_sp(struct bio_vec *mp_bv,
+ struct bio_vec *sp_bv)
+{
+ struct bvec_iter iter;
+
+ bvec_for_each_sp_bvec(*sp_bv, mp_bv, iter)
+ ;
+}
+
#endif /* __LINUX_BVEC_ITER_H */
--
2.7.4
--
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