linux-kernel - Re: [PATCH] mm: memcg: remove obsolete memcg_has

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Message-ID: <20201117025551.GA1103291@ubuntu-m3-large-x86>
Date:   Mon, 16 Nov 2020 19:55:51 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Lukas Bulwahn <lukas.bulwahn@...il.com>
Cc:     Roman Gushchin <guro@...com>, Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Tom Rix <trix@...hat.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: memcg: remove obsolete memcg_has_children()

On Mon, Nov 16, 2020 at 06:50:43AM +0100, Lukas Bulwahn wrote:
> Commit 2ef1bf118c40 ("mm: memcg: deprecate the non-hierarchical mode")
> removed the only use of memcg_has_children() in
> mem_cgroup_hierarchy_write() as part of the feature deprecation.
> 
> Hence, since then, make CC=clang W=1 warns:
> 
>   mm/memcontrol.c:3421:20:
>     warning: unused function 'memcg_has_children' [-Wunused-function]
> 
> Simply remove this obsolete unused function.
> 
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@...il.com>

Reviewed-by: Nathan Chancellor <natechancellor@...il.com>