Messages in this thread | | | Date | Wed, 01 Apr 2009 21:03:23 +0900 | From | Tejun Heo <> | Subject | Re: [PATCH 7/8] blk-map: let blk_rq_map_user_iov() support null mapping |
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FUJITA Tomonori wrote: > On Wed, 1 Apr 2009 20:04:43 +0900 > Tejun Heo <tj@kernel.org> wrote: > >> Impact: API expansion >> >> Till now, only blk_rq_map() supported null mapping. Add null mapping >> support to blk_rq_map_user_iov() by moving BIO_NULL_MAPPED setting to >> bio_copy_user_iov(). > > Why does blk_rq_map_user_iov() need to support the null mapping?
Because the next patch makes blk_rq_map_user() use it.
-- tejun
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