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

[KyongHo Cho]

> 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?