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| author | Kent Overstreet <kmo@daterainc.com> | 2013-08-07 14:26:21 -0700 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2013-11-23 22:33:49 -0800 |
| commit | 4550dd6c6b062fc5e5b647296d55da22616123c3 (patch) | |
| tree | 9ca83cc0283151980b7c2f18c0e928aa34a2a0d9 /include/linux/blkdev.h | |
| parent | 7988613b0e5b2638caf6cd493cc78e9595eba19c (diff) | |
| download | op-kernel-dev-4550dd6c6b062fc5e5b647296d55da22616123c3.zip op-kernel-dev-4550dd6c6b062fc5e5b647296d55da22616123c3.tar.gz | |
block: Immutable bio vecs
This adds a mechanism by which we can advance a bio by an arbitrary
number of bytes without modifying the biovec: bio->bi_iter.bi_bvec_done
indicates the number of bytes completed in the current bvec.
Various driver code still needs to be updated to not refer to the bvec
directly before we can use this for interesting things, like efficient
bio splitting.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Lars Ellenberg <drbd-dev@lists.linbit.com>
Cc: Paul Clements <Paul.Clements@steeleye.com>
Cc: drbd-user@lists.linbit.com
Cc: nbd-general@lists.sourceforge.net
Diffstat (limited to 'include/linux/blkdev.h')
| -rw-r--r-- | include/linux/blkdev.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 337b92a..02cb6f0 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -750,9 +750,9 @@ struct req_iterator { __rq_for_each_bio(_iter.bio, _rq) \ bio_for_each_segment(bvl, _iter.bio, _iter.iter) -#define rq_iter_last(rq, _iter) \ +#define rq_iter_last(bvec, _iter) \ (_iter.bio->bi_next == NULL && \ - bio_iter_last(_iter.bio, _iter.iter)) + bio_iter_last(bvec, _iter.iter)) #ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE # error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform" |
