From mboxrd@z Thu Jan  1 00:00:00 1970
From: ankitprasad.r.sharma@intel.com
Subject: [PATCH 5/6] drm/i915: Support for pread/pwrite from/to
	non shmem backed objects
Date: Thu,  8 Oct 2015 11:54:28 +0530
Message-ID: <1444285469-8187-6-git-send-email-ankitprasad.r.sharma@intel.com>
References: <1444285469-8187-1-git-send-email-ankitprasad.r.sharma@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga02.intel.com (mga02.intel.com [134.134.136.20])
 by gabe.freedesktop.org (Postfix) with ESMTP id 1DEB56E6D7
 for <intel-gfx@lists.freedesktop.org>; Wed,  7 Oct 2015 23:44:14 -0700 (PDT)
In-Reply-To: <1444285469-8187-1-git-send-email-ankitprasad.r.sharma@intel.com>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/intel-gfx>
List-Post: <mailto:intel-gfx@lists.freedesktop.org>
List-Help: <mailto:intel-gfx-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=subscribe>
Errors-To: intel-gfx-bounces@lists.freedesktop.org
Sender: "Intel-gfx" <intel-gfx-bounces@lists.freedesktop.org>
To: intel-gfx@lists.freedesktop.org
Cc: Ankitprasad Sharma <ankitprasad.r.sharma@intel.com>, akash.goel@intel.com, shashidhar.hiremath@intel.com
List-Id: intel-gfx@lists.freedesktop.org
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