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Works in a similar way to get_file(), and is needed in cases such as when the exporter needs to also keep a reference to the dmabuf (that is later released with a dma_buf_put()), and possibly other similar cases. Signed-off-by: Rob Clark <rob@ti.com> Reviewed-by: Dave Airlie <airlied@redhat.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>