block: remove __blk_rq_unmap_user
Open code __blk_rq_unmap_user in the two callers. Both never pass a NULL bio, and one of them can use an existing local variable instead of the bio flag. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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