This looks good to me - if you and Tom are fine with it I'd like to fold it into his commit so that what I'll send to Linus is bisection clean. > Note: we still need sev_active() defined because of the reference > in fs/core/vmcore, but this one is likely to go away soon along > with the need for an s390 sev_active(). Any chance we could not change the return value from the function at least in this patch/fold as that change seems unrelated to the dma functionality. If that is what you really wanted and only the dma code was in the way we can happily merge it as a separate patch, of couse.