From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefano Stabellini <sstabellini@kernel.org>
Subject: [PATCH v7 05/18] xen/pvcalls: connect to a frontend
Date: Wed,  5 Jul 2017 14:50:45 -0700
Message-ID: <1499291458-30231-5-git-send-email-sstabellini@kernel.org>
References: <alpine.DEB.2.10.1707051447010.2919@sstabellini-ThinkPad-X260>
 <1499291458-30231-1-git-send-email-sstabellini@kernel.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <xen-devel-bounces@lists.xen.org>
In-Reply-To: <1499291458-30231-1-git-send-email-sstabellini@kernel.org>
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@lists.xen.org
Cc: jgross@suse.com, Stefano Stabellini <stefano@aporeto.com>, boris.ostrovsky@oracle.com, sstabellini@kernel.org, linux-kernel@vger.kernel.org
List-Id: xen-devel@lists.xenproject.org
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