On Mon, Sep 18, 2017 at 12:21:40PM +0800, Huacai Chen wrote: > We will use device_is_coherent() as a helper function, in order to set > an appropriate dma alignment in dmapool and block queue (other patches > in this series). > > There is a MIPS-specific plat_device_is_coherent(), but we need a more > generic solution, so add and use a new function pointer in dma_map_ops. This is still missing any explanation on what this API could do with the information, and both of the callers in the series don't actually need it.