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0a2481cd Tue Mar 28 16:10:31 CDT 2023 Jens Axboe <axboe@kernel.dk> block: ensure bio_alloc_map_data() deals with ITER_UBUF correctlyThis helper blindly copies the iovec, even if we don't have one.Make this case a bit smarter by only doing so if we have an iovecarray to copy.Signed-off-by: Jens Axboe <axboe@kernel.dk>