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Date: Mon, 01 Dec 2008 09:52:34 -0500
From: Rik van Riel <riel@redhat.com>
Organization: Red Hat, Inc
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To: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
CC: LKML <linux-kernel@vger.kernel.org>, linux-mm <linux-mm@kvack.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Balbir Singh <balbir@linux.vnet.ibm.com>,
       KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH 05/11] memcg: add null check to page_cgroup_zoneinfo()
References: <20081201205810.1CCA.KOSAKI.MOTOHIRO@jp.fujitsu.com> <20081201211424.1CD9.KOSAKI.MOTOHIRO@jp.fujitsu.com>
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KOSAKI Motohiro wrote:
> if CONFIG_CGROUP_MEM_RES_CTLR_SWAP=y, page_cgroup::mem_cgroup can be NULL.
> Therefore null checking is better.
> 
> latter patch use this function.
> 
> 
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>

Acked-by: Rik van Riel <riel@redhat.com>

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