nouveau: simplify nouveau_dmem_migrate_vma
Factor the main copy page to vram routine out into a helper that acts on a single page and which doesn't require the nouveau_dmem_migrate structure for argument passing. As an added benefit the new version only allocates the dma address array once and reuses it for each subsequent chunk of work. Link: https://lore.kernel.org/r/20190814075928.23766-8-hch@lst.de Signed-off-by:Christoph Hellwig <hch@lst.de> Reviewed-by:
Ralph Campbell <rcampbell@nvidia.com> Tested-by:
Ralph Campbell <rcampbell@nvidia.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
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