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Date: Thu, 20 Sep 2012 15:28:32 +0900
From: Minchan Kim <minchan@kernel.org>
To: Wen Congyang <wency@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Ingo Molnar <mingo@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>, khlebnikov@openvz.org,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] trace: don't call page_to_pfn() if page is NULL
Message-ID: <20120920062832.GG13234@bbox>
References: <505AB1FF.8020104@cn.fujitsu.com>
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On Thu, Sep 20, 2012 at 02:04:47PM +0800, Wen Congyang wrote:
> When allocating memory fails, page is NULL. page_to_pfn() will
> cause the kernel panicked if we don't use sparsemem vmemmap.
> 
> Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>

Nice catch.
I think it's a candidate of stable.

Reviewed-by: Minchan Kim <minchan@kernel.org>

-- 
Kind regards,
Minchan Kim