Re: RFC: PERCPU_LIST to fix PR kern/52515

[Taylor R Campbell <campbell+netbsd-tech-kern%mumble.net@localhost>]

> Date: Fri, 6 Oct 2017 13:14:14 +0900
> From: Ryota Ozaki <ozaki-r%netbsd.org@localhost>
> 
> On Fri, Oct 6, 2017 at 11:58 AM, Taylor R Campbell
> <campbell+netbsd-tech-kern%mumble.net@localhost> wrote:
> > Note that your patch changes the ABI of struct psref!
> 
> Let's bump the kernel version!

If we want to pull the fix up to netbsd-8 (which we almost certainly
do), then we should really avoid changing the ABI.  I forget what the
rules are for pullups to pre-release branches, but changing the ABI is
a big no-no post-release.