[PATCH V6 13/30] block: introduce rq_for_each_chunk()

[Ming Lei]

There are still cases in which rq_for_each_chunk() is required, for
example, loop.

Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
 include/linux/blkdev.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index bca3a92eb55f..4eaba73c784a 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -941,6 +941,10 @@ struct req_iterator {
 	__rq_for_each_bio(_iter.bio, _rq)			\
 		bio_for_each_segment(bvl, _iter.bio, _iter.iter)
 
+#define rq_for_each_chunk(bvl, _rq, _iter)			\
+	__rq_for_each_bio(_iter.bio, _rq)			\
+		bio_for_each_chunk(bvl, _iter.bio, _iter.iter)
+
 #define rq_iter_last(bvec, _iter)				\
 		(_iter.bio->bi_next == NULL &&			\
 		 bio_iter_last(bvec, _iter.iter))
-- 
2.9.5