> 2023年2月21日 17:54，Christoph Hellwig <hch@xxxxxx> 写道： > > Can you explain the motivation here? Also why riscv patches are at > the end of a mips fіxes series? Ah sorry for any confusion. So the main purpose of this patch is to fix MIPS’s broken per-device coherency. To be more precise, we want to be able to control the default coherency for all devices probed from devicetree in early boot code. To achieve that I decided to reuse dma_default_coherent to set default coherency for devicetree. And all later patches are severing for this purpose. Thanks - Jiaxun
