linux-kernel - Re: Calculating array sizes in C - was: Re: Build regressions/improvements in v6.2-rc1

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Date:   Fri, 20 Jan 2023 20:29:40 +0100
From:   Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>
To:     John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-kernel@...r.kernel.org, amd-gfx@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org,
        linux-mips@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-sh@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
        linuxppc-dev@...ts.ozlabs.org, kasan-dev@...glegroups.com,
        linux-xtensa@...ux-xtensa.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: Calculating array sizes in C - was: Re: Build
 regressions/improvements in v6.2-rc1

Hello Adrian,
> Could you post a kernel patch for that? I would be happy to test it on my
> SH-7785CLR board. Also, I'm going to file a bug report against GCC.

I filed the bug already. It's 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108483.

The diff is attached. It's published as CC0 in case anyone considers 
this trivial change copyrightable. This patch prevents this one specific 
warning from being upgraded to "error" even if you configure the kernel 
to use "-Werror". It still keeps it active as warning, though.

Kind regards,
   Michael Karcher

View attachment "werror.diff" of type "text/plain" (469 bytes)