linux-kernel - Re: [PATCH] vmscan: fix memcg

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Message-ID: <CAK8P3a2pn4s1aLWAd+riKHO9RGgu20u=62Ds1fWg1OCQEGiiOw@mail.gmail.com>
Date:   Mon, 8 Jul 2019 15:27:45 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Yang Shi <yang.shi@...ux.alibaba.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Kirill Tkhai <ktkhai@...tuozzo.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...e.com>,
        Hugh Dickins <hughd@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        David Rientjes <rientjes@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Roman Gushchin <guro@...com>,
        Chris Down <chris@...isdown.name>,
        Yafang Shao <laoar.shao@...il.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>
Subject: Re: [PATCH] vmscan: fix memcg_kmem build failure

On Mon, Jul 8, 2019 at 2:42 PM Arnd Bergmann <arnd@...db.de> wrote:
>
> When CONFIG_MEMCG_KMEM is disabled, we get a build failure
> for calling a nonexisting memcg_expand_shrinker_maps():
>
> mm/vmscan.c:220:7: error: implicit declaration of function 'memcg_expand_shrinker_maps' [-Werror,-Wimplicit-function-declaration]
>                 if (memcg_expand_shrinker_maps(id)) {
>                     ^

I see now that a fix for this is already in today's linux-next, please ignore
my patch.

      Arnd