From: =?gb2312?B?c2FtdWVsbGlhbyjBzsn6w+cp?= <samuelliao@tencent.com>
To: Yinghai Lu <yinghai@kernel.org>, Shan Wei <shanwei88@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>,
        Lin Feng <linfeng@cn.fujitsu.com>,
        "H. Peter Anvin" <hpa@linux.intel.com>,
        Kernel-Maillist <linux-kernel@vger.kernel.org>,
        =?gb2312?B?ZGF2aWRzaGFuKLWlzsAp?= <davidshan@tencent.com>
Subject: Re: [PATCH buf-fix] kernel, range: fix broken mtrr_cleanup(Internet
 mail)
Thread-Topic: [PATCH buf-fix] kernel, range: fix broken
 mtrr_cleanup(Internet mail)
Thread-Index: AQHOZPWo5v+oeJKacUaifSBEAKM5NJktYiOAgAWK2GA=
Date: Thu, 13 Jun 2013 02:18:29 +0000
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I forget change final_start/final_end to start/end.  The old code add empty range in following case:

Before mtrr cleanup:
1. got initial MTRR range: 0-3G.
2. MTRR code try to merge 0-1M
3. result is 0-0, 0-3G,  total 2 range count

After cleanup:
1. got final MTRR range: 0-3G, total 1 range count

the cleanup code failed, because range count mismatch.
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