From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cong Wang <xiyou.wangcong@gmail.com>
Subject: Re: [PATCH v5] remove no longer use of pdflush interface
Date: Wed, 13 Jun 2012 06:18:00 +0000 (UTC)
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On Mon, 11 Jun 2012 at 00:31 GMT, Wanpeng Li <liwp.linux@gmail.com> wrote:
> +	printk_once(KERN_WARNING "%s exported in /proc is scheduled for removal\n",
> +			table->procname);
> +

This equals to WARN_ONCE(1, ....);