[PATCH 5/5] kcfi: Rename CONFIG_CFI_CLANG to CONFIG_CFI

[Miguel Ojeda]

On Mon, Aug 25, 2025 at 5:35 PM Kees Cook <kees at kernel.org> wrote:
>
> Yeah, that's a good idea. What the right way to do that?
>
> config CFI_CLANG
>         bool "Use Clang's Control Flow Integrity (CFI)"
>         depends on ARCH_SUPPORTS_CFI
>         select CFI
>
> ?

I don't recall what is the idiomatic solution for renames, but I
remember Linus talking about this topic and about avoiding losing old
values if possible (perhaps getting a new question in `oldconfig` is
OK as long as the `olddefconfig` respects the old value).

I think your suggestion above will still make it appear twice in
`menuconfig` -- there may be a way to play with visibility to make it
better.

A simple possibility I can think of (assuming it works) is having the
CFI symbol for the time being introduced just as a `def_bool
CFI_CLANG` for a few releases so that people get the new one in their
configs.

Cheers,
Miguel