linux-kernel - Re: [PATCH v2 1/3] mm/memcg: Clean up obsolete enum charge

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Date:   Mon, 14 Sep 2020 13:37:22 +0200
From:   Michal Hocko <mhocko@...e.com>
To:     Waiman Long <longman@...hat.com>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, linux-mm@...ck.org,
        Shakeel Butt <shakeelb@...gle.com>,
        Chris Down <chris@...isdown.name>,
        Roman Gushchin <guro@...com>,
        Yafang Shao <laoar.shao@...il.com>
Subject: Re: [PATCH v2 1/3] mm/memcg: Clean up obsolete enum charge_type

On Sun 13-09-20 22:44:50, Waiman Long wrote:
> Since commit 0a31bc97c80c ("mm: memcontrol: rewrite uncharge API") and
> commit 00501b531c47 ("mm: memcontrol: rewrite charge API") in v3.17, the
> enum charge_type was no longer used anywhere. However, the enum itself
> was not removed at that time. Remove the obsolete enum charge_type now.
> 
> Signed-off-by: Waiman Long <longman@...hat.com>
> Acked-by: Johannes Weiner <hannes@...xchg.org>
> Reviewed-by: Shakeel Butt <shakeelb@...gle.com>

Acked-by: Michal Hocko <mhocko@...e.com>

> ---
>  mm/memcontrol.c | 8 --------
>  1 file changed, 8 deletions(-)
> 
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index cfa6cbad21d5..8c74f1200261 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -197,14 +197,6 @@ static struct move_charge_struct {
>  #define	MEM_CGROUP_MAX_RECLAIM_LOOPS		100
>  #define	MEM_CGROUP_MAX_SOFT_LIMIT_RECLAIM_LOOPS	2
>  
> -enum charge_type {
> -	MEM_CGROUP_CHARGE_TYPE_CACHE = 0,
> -	MEM_CGROUP_CHARGE_TYPE_ANON,
> -	MEM_CGROUP_CHARGE_TYPE_SWAPOUT,	/* for accounting swapcache */
> -	MEM_CGROUP_CHARGE_TYPE_DROP,	/* a page was unused swap cache */
> -	NR_CHARGE_TYPE,
> -};
> -
>  /* for encoding cft->private value on file */
>  enum res_type {
>  	_MEM,
> -- 
> 2.18.1
> 

-- 
Michal Hocko
SUSE Labs