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

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Message-ID: <9031f42f-6ff3-3e60-049b-fc1917915da9@huawei.com>
Date:   Tue, 11 Jul 2023 10:06:52 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     Tejun Heo <tj@...nel.org>, Stephen Rothwell <sfr@...b.auug.org.au>
CC:     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 2023/7/11 9:22, Tejun Heo wrote:
> 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?

Will do. Sorry for my mistake.

Thanks.