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

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Message-ID: <CAHmME9pqXvoYZL4u3dzfQDNyDB3TbaMAkynn=MLqagC_Dmk6TQ@mail.gmail.com>
Date:   Thu, 20 Oct 2022 10:33:53 -0600
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     kernel test robot <lkp@...el.com>
Cc:     linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-toolchains@...r.kernel.org,
        kbuild-all@...ts.01.org, Masahiro Yamada <masahiroy@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] kbuild: treat char as always signed

On Thu, Oct 20, 2022 at 2:40 AM kernel test robot <lkp@...el.com> wrote:
> >> drivers/s390/block/dasd.c:1912:9: warning: case label value exceeds maximum value for type [-Wswitch-outside-range]
>     1912 |         case DASD_CQR_ERROR:

Just to save other readers the momentary "huh?" that I experienced,
this warning/error is from the -fsigned-char patch. We ultimately went
with (or are trying to go with) the -funsigned-char approach instead.
So safely ignore this kernel test bot error, as it applies to v1
rather than the v2 here:
https://lore.kernel.org/lkml/20221019203034.3795710-1-Jason@zx2c4.com/

Jason