On 2023-02-21 18:15, Jiaxun Yang wrote:
2023年2月21日 17:54，Christoph Hellwig <h...@lst.de> 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.
Including the patch which actually does that would be helpful. As it is,
patches 4-7 here just appear to be moving an option around for no
practical effect.
Robin.
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
