linux-kernel - Re: [Part3 PATCH v2 2/4] mem-hotplug: Skip LOCAL_NODE

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Date:	Thu, 13 Jun 2013 10:17:02 -0700
From:	Dave Hansen <dave.hansen@...el.com>
To:	Tang Chen <tangchen@...fujitsu.com>
CC:	tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	mgorman@...e.de, minchan@...nel.org, mina86@...a86.com,
	gong.chen@...ux.intel.com, vasilis.liaskovitis@...fitbricks.com,
	lwoodman@...hat.com, riel@...hat.com, jweiner@...hat.com,
	prarit@...hat.com, x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [Part3 PATCH v2 2/4] mem-hotplug: Skip LOCAL_NODE_DATA pages
 in memory offline procedure.

On 06/13/2013 06:03 AM, Tang Chen wrote:
> +static inline bool is_local_node_data(struct page *page)
> +{
> +	return (unsigned long)page->lru.next == LOCAL_NODE_DATA;
> +}

page->lru is already in a union.  Could you please just add a new entry
to the union with a nice associated comment instead of reusing it this way?
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