Re: [PATCH v2 00/19] `zerocopy` support

On Tue, Jun 9, 2026 at 2:43 PM Alice Ryhl <[email protected]> wrote:
>
> > It's not clear to me if changing the uapi headers like this is even
> > allowed to begin with. It's a somewhat non-trivial change.

After our call I recalled the tool I was thinking about:

  scripts/check-uapi.sh
  Documentation/dev-tools/checkuapi.rst

It turns out it uses `abidiff` (abigail).

From a quick look, it seems to complain if I add explicit padding
where implicit padding was there before, i.e. as a "data member
insertion", even if the types etc. are the same.

However, for this change, i.e. when inside the `union`, it doesn't
seem to complain.

Cheers,
Miguel