On Mon, Jan 22, 2018 at 10:59 AM, Benjamin Beckmeyer <beckmeyer.b@xxxxxxxxx> wrote: >> OK that doesn't work. Scratch that patch. What about this instead? > > That is working. OK so it was just my random abuse of the DMA API. Sorry for my shitty code that of course works fine on the DMA-coherent x86... > I did some quick testing with time and dd again. OK :) I'll fold this patch into the original, tag with your Tested-by and send out as non-RFC. Yours, Linus Walleij