linux-kernel - Re: [PATCH 07/11] powercap/intel_rapl: simplify rapl_find

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Message-ID: <CAJZ5v0i1LigqFyg3tFrcOyJRehJyKJOyn7CSePOok=q+3zewpg@mail.gmail.com>
Date:   Tue, 19 Feb 2019 10:11:37 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Len Brown <lenb@...nel.org>
Cc:     "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Len Brown <len.brown@...el.com>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 07/11] powercap/intel_rapl: simplify rapl_find_package()

On Tue, Feb 19, 2019 at 4:41 AM Len Brown <lenb@...nel.org> wrote:
>
> From: Zhang Rui <rui.zhang@...el.com>
>
> Simplify how the code to discover a package is called.
> Rename find_package_by_id() to rapl_find_package()
>
> No functional change.
>
> Signed-off-by: Zhang Rui <rui.zhang@...el.com>
> Signed-off-by: Len Brown <len.brown@...el.com>
> Cc: linux-pm@...r.kernel.org
> Signed-off-by: Len Brown <len.brown@...el.com>

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

> ---
>  drivers/powercap/intel_rapl.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/powercap/intel_rapl.c b/drivers/powercap/intel_rapl.c
> index 6cdb2c14eee4..6057d9695fed 100644
> --- a/drivers/powercap/intel_rapl.c
> +++ b/drivers/powercap/intel_rapl.c
> @@ -264,8 +264,9 @@ static struct powercap_control_type *control_type; /* PowerCap Controller */
>  static struct rapl_domain *platform_rapl_domain; /* Platform (PSys) domain */
>
>  /* caller to ensure CPU hotplug lock is held */
> -static struct rapl_package *find_package_by_id(int id)
> +static struct rapl_package *rapl_find_package(int cpu)
>  {
> +       int id = topology_physical_package_id(cpu);
>         struct rapl_package *rp;
>
>         list_for_each_entry(rp, &rapl_packages, plist) {
> @@ -1298,7 +1299,7 @@ static int __init rapl_register_psys(void)
>         rd->rpl[0].name = pl1_name;
>         rd->rpl[1].prim_id = PL2_ENABLE;
>         rd->rpl[1].name = pl2_name;
> -       rd->rp = find_package_by_id(0);
> +       rd->rp = rapl_find_package(0);
>
>         power_zone = powercap_register_zone(&rd->power_zone, control_type,
>                                             "psys", NULL,
> @@ -1454,8 +1455,9 @@ static void rapl_remove_package(struct rapl_package *rp)
>  }
>
>  /* called from CPU hotplug notifier, hotplug lock held */
> -static struct rapl_package *rapl_add_package(int cpu, int pkgid)
> +static struct rapl_package *rapl_add_package(int cpu)
>  {
> +       int id = topology_physical_package_id(cpu);
>         struct rapl_package *rp;
>         int ret;
>
> @@ -1464,7 +1466,7 @@ static struct rapl_package *rapl_add_package(int cpu, int pkgid)
>                 return ERR_PTR(-ENOMEM);
>
>         /* add the new package to the list */
> -       rp->id = pkgid;
> +       rp->id = id;
>         rp->lead_cpu = cpu;
>
>         /* check if the package contains valid domains */
> @@ -1495,12 +1497,11 @@ static struct rapl_package *rapl_add_package(int cpu, int pkgid)
>   */
>  static int rapl_cpu_online(unsigned int cpu)
>  {
> -       int pkgid = topology_physical_package_id(cpu);
>         struct rapl_package *rp;
>
> -       rp = find_package_by_id(pkgid);
> +       rp = rapl_find_package(cpu);
>         if (!rp) {
> -               rp = rapl_add_package(cpu, pkgid);
> +               rp = rapl_add_package(cpu);
>                 if (IS_ERR(rp))
>                         return PTR_ERR(rp);
>         }
> @@ -1510,11 +1511,10 @@ static int rapl_cpu_online(unsigned int cpu)
>
>  static int rapl_cpu_down_prep(unsigned int cpu)
>  {
> -       int pkgid = topology_physical_package_id(cpu);
>         struct rapl_package *rp;
>         int lead_cpu;
>
> -       rp = find_package_by_id(pkgid);
> +       rp = rapl_find_package(cpu);
>         if (!rp)
>                 return 0;
>
> --
> 2.18.0-rc0
>