block: introduce bio_for_each_bvec() and rq_for_each_bvec()
bio_for_each_bvec() is used for iterating over multi-page bvec for bio split & merge code. rq_for_each_bvec() can be used for drivers which may handle the multi-page bvec directly, so far loop is one perfect use case. Reviewed-by:Christoph Hellwig <hch@lst.de> Reviewed-by:
Omar Sandoval <osandov@fb.com> Signed-off-by:
Ming Lei <ming.lei@redhat.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
3d75ca0a
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