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alloc_coherent dma_ops callback was added to GART, however, it doesn't return a size aligned address wrt dma_alloc_coherent, as DMA-mapping.txt defines. This patch fixes it. This patch also removes unused gart_map_simple (dma_mapping_ops->map_simple has gone). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>