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From:   Linus Torvalds <torvalds@linux-foundation.org>
Date:   Wed, 4 Apr 2018 14:59:09 -0700
Message-ID: <CA+55aFwp8vRmf5p09nbunp6DfO+YvvWLj=FsU8KSW0ZwF6u80w@mail.gmail.com>
Subject: Re: [GIT PULL] x86/build changes for v4.17
To:     Matthias Kaehlcke <mka@chromium.org>
Cc:     Arnd Bergmann <arnd@arndb.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        James Y Knight <jyknight@google.com>,
        Chandler Carruth <chandlerc@google.com>,
        Stephen Hines <srhines@google.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Kees Cook <keescook@google.com>,
        Guenter Roeck <groeck@chromium.org>,
        Greg Hackmann <ghackmann@google.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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On Wed, Apr 4, 2018 at 2:46 PM, Matthias Kaehlcke <mka@chromium.org> wrote:
>
> I understand this is annoying, but it seems I'm missing something:

I think you're looking at !AEABI case.

The AEABI case is worse. It ends up getting the code from
include/asm-generic/div64.h after defining a few helper inline asm
functions.

It's probably best if you start taking some recreational drugs
_before_ looking at that code.  It might make you go "Ooh, kewl!"
instead of trying to dig out your eyeballs with a rusty spoon.

               Linus