linux-kernel - Re: [PATCH 13/15] irqchip/gic: Prepare for adding platform driver

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Date:	Tue, 29 Mar 2016 15:04:01 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Jon Hunter <jonathanh@...dia.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Marc Zyngier <marc.zyngier@....com>,
	Benoît Cousson <bcousson@...libre.com>,
	Tony Lindgren <tony@...mide.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Kevin Hilman <khilman@...nel.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-tegra@...r.kernel.org,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 13/15] irqchip/gic: Prepare for adding platform driver

Hi Jon,

On Thu, Mar 17, 2016 at 3:19 PM, Jon Hunter <jonathanh@...dia.com> wrote:
> --- a/drivers/irqchip/irq-gic.c
> +++ b/drivers/irqchip/irq-gic.c

> -#ifdef CONFIG_SMP
> -               set_smp_cross_call(gic_raise_softirq);
> -               register_cpu_notifier(&gic_cpu_notifier);
> -#endif


> +       if (gic_nr == 0) {
> +               if (IS_ENABLED(CONFIG_SMP)) {
> +                       set_smp_cross_call(gic_raise_softirq);

If CONFIG_SMP=n:

drivers/irqchip/irq-gic.c: In function '__gic_init_bases':
drivers/irqchip/irq-gic.c:1165:4: error: implicit declaration of
function 'set_smp_cross_call' [-Werror=implicit-function-declaration]
    set_smp_cross_call(gic_raise_softirq);
    ^

There's no dummy for the CONFIG_SMP=n case, so you either have to
keep the #ifdef, or add a dummy.

> +                       register_cpu_notifier(&gic_cpu_notifier);
> +               }




-- 
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