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

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Date:   Thu, 17 Nov 2022 08:15:28 -0500
From:   Waiman Long <longman@...hat.com>
To:     Kamalesh Babulal <kamalesh.babulal@...cle.com>,
        Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>
Cc:     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 11/17/22 02:15, Kamalesh Babulal 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)
>   {
Acked-by: Waiman Long <longman@...hat.com>