[v3,1/3] x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc

init_freq_invariance_cppc() was called in acpi_cppc_processor_probe(),
after CPU performance information and controls were populated from the
per-cpu _CPC objects.

But these _CPC objects provide information that helps with both CPU
(u-arch) and frequency invariance. Therefore, change the function name
to a more generic one, while adding the arch_ prefix, as this function
is expected to be defined differently by different architectures.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Tested-by: Valentin Schneider <valentin.schneider@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Giovanni Gherdovich <ggherdovich@suse.cz>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
---
 arch/x86/include/asm/topology.h | 2 +-
 drivers/acpi/cppc_acpi.c        | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

On Wed, Mar 2, 2022 at 7:10 PM Ionela Voinescu <ionela.voinescu@arm.com> wrote:
>
> init_freq_invariance_cppc() was called in acpi_cppc_processor_probe(),
> after CPU performance information and controls were populated from the
> per-cpu _CPC objects.
>
> But these _CPC objects provide information that helps with both CPU
> (u-arch) and frequency invariance. Therefore, change the function name
> to a more generic one, while adding the arch_ prefix, as this function
> is expected to be defined differently by different architectures.
>
> Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
> Tested-by: Valentin Schneider <valentin.schneider@arm.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@redhat.com>
> Cc: Giovanni Gherdovich <ggherdovich@suse.cz>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

and who's expected to pick this up?

> ---
>  arch/x86/include/asm/topology.h | 2 +-
>  drivers/acpi/cppc_acpi.c        | 6 +++---
>  2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
> index 2f0b6be8eaab..5ec70f186775 100644
> --- a/arch/x86/include/asm/topology.h
> +++ b/arch/x86/include/asm/topology.h
> @@ -223,7 +223,7 @@ static inline void arch_set_max_freq_ratio(bool turbo_disabled)
>
>  #if defined(CONFIG_ACPI_CPPC_LIB) && defined(CONFIG_SMP)
>  void init_freq_invariance_cppc(void);
> -#define init_freq_invariance_cppc init_freq_invariance_cppc
> +#define arch_init_invariance_cppc init_freq_invariance_cppc
>  #endif
>
>  #endif /* _ASM_X86_TOPOLOGY_H */
> diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
> index 866560cbb082..bfd142ab4e07 100644
> --- a/drivers/acpi/cppc_acpi.c
> +++ b/drivers/acpi/cppc_acpi.c
> @@ -633,8 +633,8 @@ static bool is_cppc_supported(int revision, int num_ent)
>   *  )
>   */
>
> -#ifndef init_freq_invariance_cppc
> -static inline void init_freq_invariance_cppc(void) { }
> +#ifndef arch_init_invariance_cppc
> +static inline void arch_init_invariance_cppc(void) { }
>  #endif
>
>  /**
> @@ -816,7 +816,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
>                 goto out_free;
>         }
>
> -       init_freq_invariance_cppc();
> +       arch_init_invariance_cppc();
>
>         kfree(output.pointer);
>         return 0;
> --
> 2.25.1
>

On Tue, Mar 8, 2022 at 7:05 PM Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> On Wed, Mar 2, 2022 at 7:10 PM Ionela Voinescu <ionela.voinescu@arm.com> wrote:
> >
> > init_freq_invariance_cppc() was called in acpi_cppc_processor_probe(),
> > after CPU performance information and controls were populated from the
> > per-cpu _CPC objects.
> >
> > But these _CPC objects provide information that helps with both CPU
> > (u-arch) and frequency invariance. Therefore, change the function name
> > to a more generic one, while adding the arch_ prefix, as this function
> > is expected to be defined differently by different architectures.
> >
> > Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
> > Tested-by: Valentin Schneider <valentin.schneider@arm.com>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Cc: Ingo Molnar <mingo@redhat.com>
> > Cc: Giovanni Gherdovich <ggherdovich@suse.cz>
> > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
>
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

That said it will conflict with this series from Rui:

https://lore.kernel.org/linux-acpi/20220214101450.356047-1-ray.huang@amd.com/

applied by me a while ago.

Maybe consider rebasing when this gets to linux-next ->

> and who's expected to pick this up?

-> and then I guess I can pick it up if everybody agrees.

> > ---
> >  arch/x86/include/asm/topology.h | 2 +-
> >  drivers/acpi/cppc_acpi.c        | 6 +++---
> >  2 files changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
> > index 2f0b6be8eaab..5ec70f186775 100644
> > --- a/arch/x86/include/asm/topology.h
> > +++ b/arch/x86/include/asm/topology.h
> > @@ -223,7 +223,7 @@ static inline void arch_set_max_freq_ratio(bool turbo_disabled)
> >
> >  #if defined(CONFIG_ACPI_CPPC_LIB) && defined(CONFIG_SMP)
> >  void init_freq_invariance_cppc(void);
> > -#define init_freq_invariance_cppc init_freq_invariance_cppc
> > +#define arch_init_invariance_cppc init_freq_invariance_cppc
> >  #endif
> >
> >  #endif /* _ASM_X86_TOPOLOGY_H */
> > diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
> > index 866560cbb082..bfd142ab4e07 100644
> > --- a/drivers/acpi/cppc_acpi.c
> > +++ b/drivers/acpi/cppc_acpi.c
> > @@ -633,8 +633,8 @@ static bool is_cppc_supported(int revision, int num_ent)
> >   *  )
> >   */
> >
> > -#ifndef init_freq_invariance_cppc
> > -static inline void init_freq_invariance_cppc(void) { }
> > +#ifndef arch_init_invariance_cppc
> > +static inline void arch_init_invariance_cppc(void) { }
> >  #endif
> >
> >  /**
> > @@ -816,7 +816,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
> >                 goto out_free;
> >         }
> >
> > -       init_freq_invariance_cppc();
> > +       arch_init_invariance_cppc();
> >
> >         kfree(output.pointer);
> >         return 0;
> > --
> > 2.25.1
> >

On Tuesday 08 Mar 2022 at 19:22:10 (+0100), Rafael J. Wysocki wrote:
> On Tue, Mar 8, 2022 at 7:05 PM Rafael J. Wysocki <rafael@kernel.org> wrote:
> >
> > On Wed, Mar 2, 2022 at 7:10 PM Ionela Voinescu <ionela.voinescu@arm.com> wrote:
> > >
> > > init_freq_invariance_cppc() was called in acpi_cppc_processor_probe(),
> > > after CPU performance information and controls were populated from the
> > > per-cpu _CPC objects.
> > >
> > > But these _CPC objects provide information that helps with both CPU
> > > (u-arch) and frequency invariance. Therefore, change the function name
> > > to a more generic one, while adding the arch_ prefix, as this function
> > > is expected to be defined differently by different architectures.
> > >
> > > Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
> > > Tested-by: Valentin Schneider <valentin.schneider@arm.com>
> > > Cc: Thomas Gleixner <tglx@linutronix.de>
> > > Cc: Ingo Molnar <mingo@redhat.com>
> > > Cc: Giovanni Gherdovich <ggherdovich@suse.cz>
> > > Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> >
> > Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> That said it will conflict with this series from Rui:
> 
> https://lore.kernel.org/linux-acpi/20220214101450.356047-1-ray.huang@amd.com/
> 
> applied by me a while ago.
> 
> Maybe consider rebasing when this gets to linux-next ->

Will do that!

> 
> > and who's expected to pick this up?
> 
> -> and then I guess I can pick it up if everybody agrees.

Many thanks, Rafael!

> 
> > > ---
> > >  arch/x86/include/asm/topology.h | 2 +-
> > >  drivers/acpi/cppc_acpi.c        | 6 +++---
> > >  2 files changed, 4 insertions(+), 4 deletions(-)
> > >
> > > diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
> > > index 2f0b6be8eaab..5ec70f186775 100644
> > > --- a/arch/x86/include/asm/topology.h
> > > +++ b/arch/x86/include/asm/topology.h
> > > @@ -223,7 +223,7 @@ static inline void arch_set_max_freq_ratio(bool turbo_disabled)
> > >
> > >  #if defined(CONFIG_ACPI_CPPC_LIB) && defined(CONFIG_SMP)
> > >  void init_freq_invariance_cppc(void);
> > > -#define init_freq_invariance_cppc init_freq_invariance_cppc
> > > +#define arch_init_invariance_cppc init_freq_invariance_cppc
> > >  #endif
> > >
> > >  #endif /* _ASM_X86_TOPOLOGY_H */
> > > diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
> > > index 866560cbb082..bfd142ab4e07 100644
> > > --- a/drivers/acpi/cppc_acpi.c
> > > +++ b/drivers/acpi/cppc_acpi.c
> > > @@ -633,8 +633,8 @@ static bool is_cppc_supported(int revision, int num_ent)
> > >   *  )
> > >   */
> > >
> > > -#ifndef init_freq_invariance_cppc
> > > -static inline void init_freq_invariance_cppc(void) { }
> > > +#ifndef arch_init_invariance_cppc
> > > +static inline void arch_init_invariance_cppc(void) { }
> > >  #endif
> > >
> > >  /**
> > > @@ -816,7 +816,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
> > >                 goto out_free;
> > >         }
> > >
> > > -       init_freq_invariance_cppc();
> > > +       arch_init_invariance_cppc();
> > >
> > >         kfree(output.pointer);
> > >         return 0;
> > > --
> > > 2.25.1
> > >