Re: [Linaro-mm-sig] [RFC 0/2] ARM: DMA-mapping & IOMMU integration

FWIW, on ARMv6 and later hardware, the dma_alloc_coherent() provides writecombine memory (i.e. Normal Noncacheable), so no need for dma_alloc_writecombine(). On earlier architectures it is creating Strongly Ordered mappings (no writecombine).

Thanks.

Do you mean that dma_alloc_coherent() and dma_alloc_writecombine() are not different except some additional features of dma_alloc_coherent() in ARM?