dmaengine_get_unmap_data
unmap = dmaengine_get_unmap_data(device->dev, 2, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(device->dev, disks, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(dma->dev, 3, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(device->dev, src_cnt+1, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(device->dev, src_cnt, GFP_NOWAIT);
EXPORT_SYMBOL(dmaengine_get_unmap_data);
um = dmaengine_get_unmap_data(dma_dev, src->cnt + dst->cnt,
unmap = dmaengine_get_unmap_data(dma_chan->device->dev, 2, GFP_KERNEL);
unmap = dmaengine_get_unmap_data(dma_chan->device->dev, src_count + 1,
unmap = dmaengine_get_unmap_data(device->dev, 2, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(device->dev, 1, GFP_NOWAIT);
unmap = dmaengine_get_unmap_data(dma_dev, 1, GFP_NOWAIT);
dmaengine_get_unmap_data(struct device *dev, int nr, gfp_t flags);