From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Liu <wei.liu2@citrix.com>
Subject: [PATCH v4 17/31] x86/mm: move compat descriptor
	handling code
Date: Thu, 17 Aug 2017 15:44:42 +0100
Message-ID: <20170817144456.18989-18-wei.liu2@citrix.com>
References: <20170817144456.18989-1-wei.liu2@citrix.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
Received: from mail6.bemta3.messagelabs.com ([195.245.230.39])
 by lists.xenproject.org with esmtp (Exim 4.84_2)
 (envelope-from <prvs=395e6b081=wei.liu2@citrix.com>)
 id 1diM48-0001iz-Qp
 for xen-devel@lists.xenproject.org; Thu, 17 Aug 2017 14:46:32 +0000
In-Reply-To: <20170817144456.18989-1-wei.liu2@citrix.com>
List-Unsubscribe: <https://lists.xen.org/cgi-bin/mailman/options/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xen.org>
List-Help: <mailto:xen-devel-request@lists.xen.org?subject=help>
List-Subscribe: <https://lists.xen.org/cgi-bin/mailman/listinfo/xen-devel>,
 <mailto:xen-devel-request@lists.xen.org?subject=subscribe>
Errors-To: xen-devel-bounces@lists.xen.org
Sender: "Xen-devel" <xen-devel-bounces@lists.xen.org>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: George Dunlap <george.dunlap@eu.citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Wei Liu <wei.liu2@citrix.com>, Jan Beulich <JBeulich@suse.com>
List-Id: xen-devel@lists.xenproject.org
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