linux-kernel - Re: [PATCH v2] kbuild: treat char as always unsigned

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Message-ID: <CAMuHMdWP2GoBU8nwwDP2m_SUxV2sD67nTPyKjQ0Skjc7q7bcNw@mail.gmail.com>
Date:   Mon, 2 Jan 2023 09:29:02 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     David Laight <David.Laight@...lab.com>
Cc:     Holger Lubitz <holger.lubitz@...nline.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rasmus Villemoes <rasmus.villemoes@...vas.dk>,
        "Jason A. Donenfeld" <Jason@...c4.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        "linux-toolchains@...r.kernel.org" <linux-toolchains@...r.kernel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-m68k@...ts.linux-m68k.org" <linux-m68k@...ts.linux-m68k.org>
Subject: Re: [PATCH v2] kbuild: treat char as always unsigned

Hi David,

On Fri, Dec 30, 2022 at 12:39 PM David Laight <David.Laight@...lab.com> wrote:
> Thinking further the fastest strcmp() probably uses big-endian word compares
> with a check for a zero byte.
> Especially on 64 bit systems that support misaligned loads.
> But I'd need to think hard about the actual details.

arch/arc/lib/strcmp-archs.S
arch/csky/abiv2/strcmp.S

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds