linux-kernel - Re: linux-next: build warning after merge of the cgroup tree

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Message-ID: <ZKyuwkDWB85Zs9R0@slm.duckdns.org>
Date:   Mon, 10 Jul 2023 15:22:10 -1000
From:   Tejun Heo <tj@...nel.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Miaohe Lin <linmiaohe@...wei.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the cgroup tree

On Tue, Jul 11, 2023 at 11:15:09AM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the cgroup tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
> 
> kernel/cgroup/cgroup.c:503:36: warning: 'cgroup_tryget_css' defined but not used [-Wunused-function]
>   503 | static struct cgroup_subsys_state *cgroup_tryget_css(struct cgroup *cgrp,
>       |                                    ^~~~~~~~~~~~~~~~~
> 
> Introduced by commit
> 
>   1299eb2b0ad5 ("cgroup: minor cleanup for cgroup_extra_stat_show()")

Miaohe, can you send a patch to either add __maybe_unused to
cgroup_tryget_css() or also put it inside CONFIG_CGROUP_SCHED?

Thanks.

-- 
tejun