04.10.2021 23:02, Thierry Reding пишет:
> On Mon, Oct 04, 2021 at 09:33:57PM +0200, Thierry Reding wrote:
>> 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@xxxxxxxxx>
>>> ---
>>> 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.
>
> The below does the trick for me as well:
>
> --- >8 ---
> diff --git a/include/linux/clk/tegra.h b/include/linux/clk/tegra.h
> index d128ad1570aa..d261db7e6060 100644
> --- a/include/linux/clk/tegra.h
> +++ b/include/linux/clk/tegra.h
> @@ -42,6 +42,7 @@ struct tegra_cpu_car_ops {
> #endif
> };
>
> +#ifdef CONFIG_ARCH_TEGRA
> extern struct tegra_cpu_car_ops *tegra_cpu_car_ops;
>
> static inline void tegra_wait_cpu_in_reset(u32 cpu)
> @@ -83,6 +84,27 @@ static inline void tegra_disable_cpu_clock(u32 cpu)
>
> tegra_cpu_car_ops->disable_clock(cpu);
> }
> +#else
> +static inline void tegra_wait_cpu_in_reset(u32 cpu)
> +{
> +}
> +
> +static inline void tegra_put_cpu_in_reset(u32 cpu)
> +{
> +}
> +
> +static inline void tegra_cpu_out_of_reset(u32 cpu)
> +{
> +}
> +
> +static inline void tegra_enable_cpu_clock(u32 cpu)
> +{
> +}
> +
> +static inline void tegra_disable_cpu_clock(u32 cpu)
> +{
> +}
> +#endif
>
> #ifdef CONFIG_PM_SLEEP
> static inline bool tegra_cpu_rail_off_ready(void)
> --- >8 ---
>
> Do you mind if I replace your version with that? I think that's a little
> bit cleaner because it should be easier for the compiler to completely
> compile it out.
I don't mind, please choose what you prefer more. This was one of the
first variants of this patch, it adds more lines and it won't be
compiled with ARCH_TEGRA=n and COMPILE_TEST=n anyways.
