[RFC PATCH 00/21] KCFI support

[Peter Zijlstra]

On Mon, May 02, 2022 at 08:22:57AM -0700, Sami Tolvanen wrote:

> > Anyway, I think I hate that __builtin, I'd *much* rather see a variable
> > attribute or qualifier for this, such that one can mark a function
> > pointer as not doing CFI.
> >
> > I simply doesn't make sense to have a builtin that operates on an
> > expression. The whole thing is about indirect calls, IOW function
> > pointers.
> 
> I also thought an attribute would be more convenient, but the compiler
> folks prefer a built-in:
> 
> https://reviews.llvm.org/D122673

That seems to mostly worry about C++ things (overload sets, template
specialization, name mangling) we kernel folks don't seem to much care
about.

I'll stick with saying type system makes more sense to me though.