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.
Thierry
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