I don't think we have any formal processes (if I understand your acronyms right). To me common sense and trust I have in other people's judgement typically works best. This applies to both when asking for help on solutions I'm not so confident in and when I think there's simply not that much to discuss because the patch/commit is trivial or self-explanatory.
This particular issue was filed by me a good while ago, it doesn't change anything in terms of existing functionality and it patched a functional hole with means that are neither controversial, nor that difficult to understand. I honestly didn't think it was worth bothering people with requests for reviews of something that is, in essence, a trivial extension of existing code.
Obviously you do have the right to speak up if there's something wrong with a commit. And I'm more then willing to revert and reiterate if this is the case.