On Tue, Jan 10, 2017 at 04:56:41PM -0800, Bart Van Assche wrote: > Several RDMA drivers, e.g. drivers/infiniband/hw/qib, use the CPU to > transfer data between memory and PCIe adapter. Because of performance > reasons it is important that the CPU cache is not flushed when such > drivers transfer data. Make this possible by allowing these drivers to > override the dma_map_ops pointer. Additionally, introduce the function > set_dma_ops() that will be used by a later patch in this series. When you say things like "additionally", that's a huge flag that this needs to be split up into multiple patches. No need to add set_dma_ops() here in this patch. And I'd argue that it should be dma_ops_set(), and dma_ops_get(), just to keep the namespace sane, but that's probably a different set of patches... thanks, greg k-h
