[PATCH V4 27/45] block: introduce rq_for_each_segment()

Ming Lei
2017-12-18T12:29:57Z

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

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

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index ecc1a24bb5a2..99c65889fd4f 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -911,6 +911,10 @@ struct req_iterator {
__rq_for_each_bio(_iter.bio, _rq) \
bio_for_each_page(bvl, _iter.bio, _iter.iter)

+#define rq_for_each_segment(bvl, _rq, _iter) \
+ __rq_for_each_bio(_iter.bio, _rq) \
+ bio_for_each_segment(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