linux-kernel - Re: [PATCH 5/6] memcg: make mem_cgroup_reparent

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Date:	Thu, 18 Oct 2012 16:30:19 +0800
From:	Li Zefan <lizefan@...wei.com>
To:	Michal Hocko <mhocko@...e.cz>
CC:	<linux-mm@...ck.org>, <cgroups@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Tejun Heo <tj@...nel.org>,
	Johannes Weiner <hannes@...xchg.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Balbir Singh <bsingharora@...il.com>
Subject: Re: [PATCH 5/6] memcg: make mem_cgroup_reparent_charges non failing

>  static int mem_cgroup_force_empty_write(struct cgroup *cont, unsigned int event)
> @@ -5013,13 +5011,9 @@ free_out:
>  static int mem_cgroup_pre_destroy(struct cgroup *cont)
>  {
>  	struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
> -	int ret;
>  
> -	css_get(&memcg->css);
> -	ret = mem_cgroup_reparent_charges(memcg);
> -	css_put(&memcg->css);
> -
> -	return ret;
> +	mem_cgroup_reparent_charges(memcg);
> +	return 0;
>  }
>  

Why don't you make pre_destroy() return void?

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