Hi Barlomiej,
Thanks for feedback. Anyone else?Yes. :) Please take a look at the following patchset (which I'm reviving currently): https://lkml.org/lkml/2018/10/17/926 It overlaps partially with your work so we need to coordinate our efforts.
I've just sent a v3. After addressing your and Daniel's comments my series now looks pretty compact. Let's see if there's more feedback. Is your work on reviving the above mentioned 2018 series ready? Andrzej