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[PATCH v2 17/51] bvec_iter: introduce BVEC_ITER_ALL_INIT

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  [PATCH v2 17/51] bvec_iter: introduce BVEC_ITER_ALL_INIT Ming Lei <ming.lei@redhat.com> - 2017-06-26 14:20 +0200

#1674665 — [PATCH v2 17/51] bvec_iter: introduce BVEC_ITER_ALL_INIT

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

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