linux-kernel - Re: [RFC PATCH bpf-next 7/9] cgroup: Add cgroup_put() in !CONFIG

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Message-ID: <CA+khW7hbHEEv9JsSCRj5ko=rA2ZorimkpyCCKD=7usv+fTfMNg@mail.gmail.com>
Date:   Tue, 10 May 2022 11:25:42 -0700
From:   Hao Luo <haoluo@...gle.com>
To:     Yosry Ahmed <yosryahmed@...gle.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>, Tejun Heo <tj@...nel.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Shuah Khan <shuah@...nel.org>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        Michal Hocko <mhocko@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        David Rientjes <rientjes@...gle.com>,
        Greg Thelen <gthelen@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, cgroups@...r.kernel.org
Subject: Re: [RFC PATCH bpf-next 7/9] cgroup: Add cgroup_put() in
 !CONFIG_CGROUPS case

On Mon, May 9, 2022 at 5:18 PM Yosry Ahmed <yosryahmed@...gle.com> wrote:
>
> From: Hao Luo <haoluo@...gle.com>
>
> There is already a cgroup_get_from_id() in the !CONFIG_CGROUPS case,
> let's have a matching cgroup_put() in !CONFIG_CGROUPS too.
>
> Signed-off-by: Hao Luo <haoluo@...gle.com>
> Signed-off-by: Yosry Ahmed <yosryahmed@...gle.com>
> ---
>  include/linux/cgroup.h | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h
> index 5408c74d5c44..4f1d8febb9fd 100644
> --- a/include/linux/cgroup.h
> +++ b/include/linux/cgroup.h
[...]
> +
> +static inline struct cgroup *cgroup_put(void)
> +{}

Sorry Yosry, the return type and parameter type are mixed up. I will
fix it and send you an updated version.