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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Fri, 6 Jan 2023 16:17:47 +0100
Message-ID: <CAMuHMdXNJveXHeS=g-aHbnxtyACxq1wCeaTg8LbpYqJTCqk86g@mail.gmail.com>
Subject: Re: Build regressions/improvements in v6.2-rc1
To:     John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc:     linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org,
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Hi John,

On Fri, Jan 6, 2023 at 4:10 PM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
> On 12/27/22 09:35, Geert Uytterhoeven wrote:
> >    + /kisskb/src/include/linux/compiler_types.h: error: call to '__compiletime_assert_262' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().:  => 358:45
> >    + /kisskb/src/include/linux/compiler_types.h: error: call to '__compiletime_assert_263' declared with attribute error: Unsupported access size for {READ,WRITE}_ONCE().:  => 358:45
> >
> > In function 'follow_pmd_mask',
> >      inlined from 'follow_pud_mask' at /kisskb/src/mm/gup.c:735:9,
> >      inlined from 'follow_p4d_mask' at /kisskb/src/mm/gup.c:752:9,
> >      inlined from 'follow_page_mask' at /kisskb/src/mm/gup.c:809:9:
> >
> > sh4-gcc11/sh-defconfig (Günter wondered if pmd_t should use union)
>
> I'm seeing this, too. Also for sh7785lcr_defconfig.
>
> > sh4-gcc11/sh-allmodconfig (ICE = internal compiler error)
>
> I'm not seeing this one, but I am getting this one instead:
>
> In file included from ./arch/sh/include/asm/hw_irq.h:6,
>                   from ./include/linux/irq.h:596,
>                   from ./include/asm-generic/hardirq.h:17,
>                   from ./arch/sh/include/asm/hardirq.h:9,
>                   from ./include/linux/hardirq.h:11,
>                   from ./include/linux/interrupt.h:11,
>                   from ./include/linux/serial_core.h:13,
>                   from ./include/linux/serial_sci.h:6,
>                   from arch/sh/kernel/cpu/sh2/setup-sh7619.c:11:
> ./include/linux/sh_intc.h:100:63: error: division 'sizeof (void *) / sizeof (void)' does not compute the number of array elements [-Werror=sizeof-pointer-div]
>    100 | #define _INTC_ARRAY(a) a, __same_type(a, NULL) ? 0 : sizeof(a)/sizeof(*a)
>        |                                                               ^
> ./include/linux/sh_intc.h:105:31: note: in expansion of macro '_INTC_ARRAY'
>    105 |         _INTC_ARRAY(vectors), _INTC_ARRAY(groups),      \
>        |                               ^~~~~~~~~~~

The easiest fix for the latter is to disable CONFIG_WERROR.
Unfortunately I don't know a simple solution to get rid of the warning.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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