linux-kernel - Re: [PATCH v2] cgroup/cpuset: Improve cpuset_css

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Message-ID: <CAL1p7m4MeYbccde1rPKuxcbtj6Tm+sa4Ro_REAMBmWszyWJ3_w@mail.gmail.com>
Date:   Thu, 17 Nov 2022 11:03:56 -0400
From:   Joel Savitz <jsavitz@...hat.com>
To:     Kamalesh Babulal <kamalesh.babulal@...cle.com>
Cc:     Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        Waiman Long <longman@...hat.com>,
        Johannes Weiner <hannes@...xchg.org>, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Tom Hromatka <tom.hromatka@...cle.com>
Subject: Re: [PATCH v2] cgroup/cpuset: Improve cpuset_css_alloc() description

On Thu, Nov 17, 2022 at 3:18 AM Kamalesh Babulal
<kamalesh.babulal@...cle.com> wrote:
>
> Change the function argument in the description of cpuset_css_alloc()
> from 'struct cgroup' -> 'struct cgroup_subsys_state'.  The change to the
> argument type was introduced by commit eb95419b023a ("cgroup: pass
> around cgroup_subsys_state instead of cgroup in subsystem methods").
> Also, add more information to its description.
>
> Signed-off-by: Kamalesh Babulal <kamalesh.babulal@...cle.com>
> ---
> v2: Reworded the description to be more accurate, as suggested
>     by Waiman Long
>
>  kernel/cgroup/cpuset.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
> index b474289c15b8..ce789e1b2a2f 100644
> --- a/kernel/cgroup/cpuset.c
> +++ b/kernel/cgroup/cpuset.c
> @@ -3046,11 +3046,15 @@ static struct cftype dfl_files[] = {
>  };
>
>
> -/*
> - *     cpuset_css_alloc - allocate a cpuset css
> - *     cgrp:   control group that the new cpuset will be part of
> +/**
> + * cpuset_css_alloc - Allocate a cpuset css
> + * @parent_css: Parent css of the control group that the new cpuset will be
> + *              part of
> + * Return: cpuset css on success, -ENOMEM on failure.
> + *
> + * Allocate and initialize a new cpuset css, for non-NULL @parent_css, return
> + * top cpuset css otherwise.
>   */
> -
>  static struct cgroup_subsys_state *
>  cpuset_css_alloc(struct cgroup_subsys_state *parent_css)
>  {
> --
> 2.34.3
>

Acked-by: Joel Savitz <jsavitz@...hat.com>