linux-kernel - Re: [PATCH] ACPI: processor: idle: expose max_cstate/nocst/bm_check

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Message-ID: <CAJZ5v0h5Vc17rg5V_kHHV6A6=MdET9SpbQB6cvzekwFzH4Mxjg@mail.gmail.com>
Date:   Fri, 6 May 2022 20:47:39 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Yajun Deng <yajun.deng@...ux.dev>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Len Brown <lenb@...nel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ACPI: processor: idle: expose max_cstate/nocst/bm_check_disable
 read-only in sysfs

On Thu, Apr 28, 2022 at 11:54 AM Yajun Deng <yajun.deng@...ux.dev> wrote:
>
> This patch exposes max_cstate/nocst/bm_check_disable in read-only sysfs.
> This will allow super users to verify them when changed in grub.
>
> The parameters "nocst/bm_check_disable" is only used to be enable/disable.
> So change them from integer to bool.
>
> Signed-off-by: Yajun Deng <yajun.deng@...ux.dev>
> ---
>  drivers/acpi/processor_idle.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
> index e9c84d0ac55b..6a5572a1a80c 100644
> --- a/drivers/acpi/processor_idle.c
> +++ b/drivers/acpi/processor_idle.c
> @@ -38,11 +38,11 @@
>  #define ACPI_IDLE_STATE_START  (IS_ENABLED(CONFIG_ARCH_HAS_CPU_RELAX) ? 1 : 0)
>
>  static unsigned int max_cstate __read_mostly = ACPI_PROCESSOR_MAX_POWER;
> -module_param(max_cstate, uint, 0000);
> -static unsigned int nocst __read_mostly;
> -module_param(nocst, uint, 0000);
> -static int bm_check_disable __read_mostly;
> -module_param(bm_check_disable, uint, 0000);
> +module_param(max_cstate, uint, 0400);
> +static bool nocst __read_mostly;
> +module_param(nocst, bool, 0400);
> +static bool bm_check_disable __read_mostly;
> +module_param(bm_check_disable, bool, 0400);
>
>  static unsigned int latency_factor __read_mostly = 2;
>  module_param(latency_factor, uint, 0644);
> --

Applied as 5.19 material with some edits in the changelog, thanks!