linux-kernel - Re: [PATCH 3/3] loop: Charge i/o to mem and blk cg

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Date:   Tue, 16 Mar 2021 09:25:18 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Dan Schatzberg <schatzberg.dan@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Tejun Heo <tj@...nel.org>,
        Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Hugh Dickins <hughd@...gle.com>, Roman Gushchin <guro@...com>,
        Muchun Song <songmuchun@...edance.com>,
        Alex Shi <alex.shi@...ux.alibaba.com>,
        Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        Chris Down <chris@...isdown.name>,
        Yafang Shao <laoar.shao@...il.com>,
        Wei Yang <richard.weiyang@...il.com>,
        "open list:BLOCK LAYER" <linux-block@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:CONTROL GROUP (CGROUP)" <cgroups@...r.kernel.org>,
        "open list:MEMORY MANAGEMENT" <linux-mm@...ck.org>
Subject: Re: [PATCH 3/3] loop: Charge i/o to mem and blk cg

On Tue, Mar 16, 2021 at 8:37 AM Dan Schatzberg <schatzberg.dan@...il.com> wrote:
>
[...]
>
>  /* Support for loadable transfer modules */
> diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
> index 0c04d39a7967..fd5dd961d01f 100644
> --- a/include/linux/memcontrol.h
> +++ b/include/linux/memcontrol.h
> @@ -1187,6 +1187,17 @@ static inline struct mem_cgroup *get_mem_cgroup_from_mm(struct mm_struct *mm)
>         return NULL;
>  }
>
> +static inline struct mem_cgroup *get_mem_cgroup_from_page(struct page *page)
> +{
> +       return NULL;
> +}

The above function has been removed.