Re: [GIT PULL] hardening fixes for v6.6-rc3

[Linus Torvalds]

On Fri, 22 Sept 2023 at 20:49, Kees Cook <keescook@xxxxxxxxxxxx> wrote:
>
> 2) __cplusplus is relatively common in UAPI headers already:
>    $ git grep __cplusplus -- include/uapi | wc -l
>    58

Look a bit closer.

Most of those - by far - is for the usual

  #if defined(__cplusplus)
  extern "C" {
  #endif

pattern. IOW, it's explicitly not different code, but telling the C++
compiler that "this is C code".

So this new #ifdef is an ugly new pattern of "do totally different
things for C++".

Apparently required, but very ugly nonetheless.

               Linus