linux-kernel - Re: [PATCH 1/2] soc: renesas: mark OF related data as maybe unused

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Date:   Mon, 13 Mar 2023 15:04:35 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Magnus Damm <magnus.damm@...il.com>,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] soc: renesas: mark OF related data as maybe unused

On Mon, Mar 13, 2023 at 1:33 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> On Sun, Mar 12, 2023 at 2:26 PM Krzysztof Kozlowski
> <krzysztof.kozlowski@...aro.org> wrote:
> > The driver can be compile tested with !CONFIG_OF making certain data
> > unused:
> >
> >   drivers/soc/renesas/renesas-soc.c:272:34: error: ‘renesas_socs’ defined but not used [-Werror=unused-const-variable=]
>
> Where do you see this issue?

With W=1, as of_match_node() is a dummy macro, not an inline
function.

> This variable is used unconditionally, and the driver builds fine for
> me for m68k/allmodconfig+CONFIG_OF=n?
>
> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
i.e. will queue in renesas-devel for v6.4.

> > --- a/drivers/soc/renesas/renesas-soc.c
> > +++ b/drivers/soc/renesas/renesas-soc.c
> > @@ -269,7 +269,7 @@ static const struct renesas_soc soc_shmobile_ag5 __initconst __maybe_unused = {
> >  };
> >
> >
> > -static const struct of_device_id renesas_socs[] __initconst = {
> > +static const struct of_device_id renesas_socs[] __initconst __maybe_unused = {
> >  #ifdef CONFIG_ARCH_R7S72100
> >         { .compatible = "renesas,r7s72100",     .data = &soc_rz_a1h },
> >  #endif

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