On Mon, 21 Feb 2022, Jiaxun Yang wrote: > So we can share understanding of those barriers with other archs > and hopefully one day we will be able to switch asm-generic. You're mixing the ordering of DMA WRT MMIO here with the ordering of MMIO WRT itself, and this single line of justification does not explain why it is a change worth making. You're free to define additional DMA barriers if we're missing some. Maciej
