linux-kernel - Re: [PATCH v2 1/3] x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance

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Message-ID: <CAJZ5v0jaRaP-+Zxx9NS8OcREEbmcJo1Zs-p3gT9BLNKBtNtqyg@mail.gmail.com>
Date:   Wed, 25 Aug 2021 19:48:28 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Ionela Voinescu <ionela.voinescu@....com>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Giovanni Gherdovich <ggherdovich@...e.cz>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Valentin Schneider <valentin.schneider@....com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Sean Kelley <skelley@...dia.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/3] x86, ACPI: rename init_freq_invariance_cppc to arch_init_invariance_cppc

On Tue, Aug 24, 2021 at 12:57 PM Ionela Voinescu
<ionela.voinescu@....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@....com>
> Tested-by: Valentin Schneider <valentin.schneider@....com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Giovanni Gherdovich <ggherdovich@...e.cz>
> Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>

Acked-by: Rafael J. Wysocki <rafael@...nel.org>

> ---
>  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 9239399e5491..61d73013cab8 100644
> --- a/arch/x86/include/asm/topology.h
> +++ b/arch/x86/include/asm/topology.h
> @@ -220,7 +220,7 @@ static inline void arch_set_max_freq_ratio(bool turbo_disabled)
>
>  #ifdef CONFIG_ACPI_CPPC_LIB
>  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 a4d4eebba1da..c211d77310e8 100644
> --- a/drivers/acpi/cppc_acpi.c
> +++ b/drivers/acpi/cppc_acpi.c
> @@ -660,8 +660,8 @@ 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
>
>  /**
> @@ -826,7 +826,7 @@ 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;
> --
> 2.29.2.dirty
>