linux-kernel - Re: [PATCH] include/linux/compiler*.h: make compiler-*.h mutually exclusive

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Date:   Wed, 22 Aug 2018 17:21:48 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Kees Cook <keescook@...omium.org>, Joe Perches <joe@...ches.com>,
        Jonathan Corbet <corbet@....net>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Arnd Bergmann <arnd@...db.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will.deacon@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dominique Martinet <asmadeus@...ewreck.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Peter Anvin <hpa@...or.com>
Subject: Re: [PATCH] include/linux/compiler*.h: make compiler-*.h mutually exclusive

On Wed, Aug 22, 2018 at 4:39 PM Nick Desaulniers
<ndesaulniers@...gle.com> wrote:
>
> Rather than always including compiler-gcc.h then undefining or
> redefining macros in compiler-intel.h or compiler-clang.h, let's
> separate out the compiler specific macro definitions into mutually
> exclusive headers, do more proper compiler detection, and keep shared
> definitions in compiler_types.h.

Ack, especially with the other cleanups leading to

>  9 files changed, 133 insertions(+), 253 deletions(-)

and I just took it directly, since I had taken the original
cafa0010cd51 directly too.

I'm sure this can still be tweaked, but let's get the baseline in and working.

               Linus