linux-kernel - Re: [PATCH v1 4/6] clk: tegra: Add stubs needed for compile testing

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Date:   Mon, 4 Oct 2021 21:33:57 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jonathan Hunter <jonathanh@...dia.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 4/6] clk: tegra: Add stubs needed for compile testing

On Sun, Sep 12, 2021 at 11:29:05PM +0300, Dmitry Osipenko wrote:
> Add stubs needed for compile-testing of tegra-cpuidle driver.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  include/linux/clk/tegra.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/linux/clk/tegra.h b/include/linux/clk/tegra.h
> index d128ad1570aa..9bd06d8a5436 100644
> --- a/include/linux/clk/tegra.h
> +++ b/include/linux/clk/tegra.h
> @@ -42,7 +42,11 @@ struct tegra_cpu_car_ops {
>  #endif
>  };
>  
> +#ifdef CONFIG_ARCH_TEGRA
>  extern struct tegra_cpu_car_ops *tegra_cpu_car_ops;
> +#else
> +static struct tegra_cpu_car_ops *tegra_cpu_car_ops __maybe_unused;
> +#endif

Ugh... this one seems a bit over the top, to be honest. The only place
where this seems to be used is in arch/arm/mach-tegra/pm.c, but that
already uses one of the stubs from include/linux/clk/tegra.h, so I'm
wondering if we can't define that latter stub in a way to make it
unnecessary to declare this bogus pointer.

I'll play around with this a little bit.

Thierry

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