From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH] x86/memshr: properly check grant references
Date: Mon, 14 Nov 2016 11:56:48 +0000
Message-ID: <06064a69-7cf4-366c-889c-22f0226eb51a@citrix.com>
References: <5829A143020000780011E59D@prv-mh.provo.novell.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.bemta6.messagelabs.com ([193.109.254.103])
 by lists.xenproject.org with esmtp (Exim 4.84_2)
 (envelope-from <prvs=11933e973=Andrew.Cooper3@citrix.com>)
 id 1c6Ft7-0005e9-7F
 for xen-devel@lists.xenproject.org; Mon, 14 Nov 2016 11:57:25 +0000
In-Reply-To: <5829A143020000780011E59D@prv-mh.provo.novell.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: Jan Beulich <JBeulich@suse.com>, xen-devel <xen-devel@lists.xenproject.org>
Cc: Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wei.liu2@citrix.com>, George Dunlap <George.Dunlap@eu.citrix.com>, Tim Deegan <tim@xen.org>, Ian Jackson <Ian.Jackson@eu.citrix.com>, tamas@tklengyel.com
List-Id: xen-devel@lists.xenproject.org
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