[PATCH v2 17/51] bvec_iter: introduce BVEC_ITER_ALL_INIT

Ming Lei
2017-06-26T12:15:49Z

Introduce BVEC_ITER_ALL_INIT for iterating one bio
from start to end.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
include/linux/bvec.h | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index 89b65b82d98f..162ca7caf510 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -94,4 +94,13 @@ static inline void bvec_iter_advance(const struct bio_vec *bv,
((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \
bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len))

+/* for iterating one bio from start to end */
+#define BVEC_ITER_ALL_INIT (struct bvec_iter) \
+{ \
+ .bi_sector = 0, \
+ .bi_size = UINT_MAX, \
+ .bi_idx = 0, \
+ .bi_bvec_done = 0, \
+}
+
#endif /* __LINUX_BVEC_ITER_H */
--
2.9.4