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

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To: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Subject: Re: [PATCH v2] kbuild: treat char as always unsigned
From: Segher Boessenkool <segher@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 20 Oct 2022 15:24:54 -0500
Cc: "Jason A. Donenfeld" <Jason@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-kbuild@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-toolchains@xxxxxxxxxxxxxxx, Masahiro Yamada <masahiroy@xxxxxxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
In-reply-to: <CAHk-=wit-67VU=kt-8Ojtx04m6wxfqypKLzW7CuSeEH_9MYZvw@mail.gmail.com>
References: <Y1BcpXAjR4tmV6RQ@zx2c4.com> <20221019203034.3795710-1-Jason@zx2c4.com> <CAHk-=wit-67VU=kt-8Ojtx04m6wxfqypKLzW7CuSeEH_9MYZvw@mail.gmail.com>
User-agent: Mutt/1.4.2.3i

On Wed, Oct 19, 2022 at 04:56:03PM -0700, Linus Torvalds wrote:
> I think the architectures with an unsigned 'char' are arm, powerpc and
> s390, in all their variations (ie both 32- and 64-bit).

xtensa and most MIPS configurations as well, fwiw.


Segher

References:
- Re: [PATCH] kbuild: treat char as always signed
  - From: Jason A. Donenfeld
- [PATCH v2] kbuild: treat char as always unsigned
  - From: Jason A. Donenfeld
- Re: [PATCH v2] kbuild: treat char as always unsigned
  - From: Linus Torvalds

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