linux-kernel - Re: linux-next: build failure after merge of the akpm-current tree

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Date:   Wed, 10 Jul 2019 09:05:09 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Yang Shi <shy828301@...il.com>
Subject: Re: linux-next: build failure after merge of the akpm-current tree

On Tue 09-07-19 13:42:33, Andrew Morton wrote:
> On Tue, 9 Jul 2019 21:15:59 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> 
> > Hi all,
> > 
> > After merging the akpm-current tree, today's linux-next build (arm
> > multi_v7_defconfig) failed like this:
> > 
> > arm-linux-gnueabi-ld: mm/list_lru.o: in function `list_lru_add':
> > list_lru.c:(.text+0x1a0): undefined reference to `memcg_set_shrinker_bit'
> > 
> > Caused by commit
> > 
> >   ca37e9e5f18d ("mm-shrinker-make-shrinker-not-depend-on-memcg-kmem-fix-2")
> > 
> > CONFIG_MEMCG is not set for this build.
> > 
> > I have reverted that commit for today.
> 
> Thanks.  This, I suppose:
> 
> --- a/include/linux/memcontrol.h~mm-shrinker-make-shrinker-not-depend-on-memcg-kmem-fix-2-fix
> +++ a/include/linux/memcontrol.h
> @@ -1259,6 +1259,8 @@ static inline bool mem_cgroup_under_sock
>  	} while ((memcg = parent_mem_cgroup(memcg)));
>  	return false;
>  }
> +extern void memcg_set_shrinker_bit(struct mem_cgroup *memcg,
> +                                  int nid, int shrinker_id);
>  #else
>  #define mem_cgroup_sockets_enabled 0
>  static inline void mem_cgroup_sk_alloc(struct sock *sk) { };
> @@ -1267,6 +1269,10 @@ static inline bool mem_cgroup_under_sock
>  {
>  	return false;
>  }
> +static inline void memcg_set_shrinker_bit(struct mem_cgroup *memcg,
> +					  int nid, int shrinker_id)
> +{
> +}
>  #endif

Can we get the full series resent please. I have completely lost track
of all the follow up fixes.

Thanks!
-- 
Michal Hocko
SUSE Labs