From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tiago Vignatti <tiago.vignatti@intel.com>
Subject: Re: [PATCH 1/2] drm/i915: Use CPU mapping for userspace
 dma-buf mmap()
Date: Wed, 05 Aug 2015 17:10:17 -0300
Message-ID: <55C26DA9.9020907@intel.com>
References: <1438375344-4954-1-git-send-email-tiago.vignatti@intel.com>
 <1438375344-4954-2-git-send-email-tiago.vignatti@intel.com>
 <20150731210234.GA16824@nuc-i3427.alporthouse.com>
 <55C12EF1.7080701@intel.com> <20150805070810.GL24689@phenom.ffwll.local>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
In-Reply-To: <20150805070810.GL24689@phenom.ffwll.local>
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: Daniel Vetter <daniel@ffwll.ch>
Cc: daniel.vetter@ffwll.ch, intel-gfx@lists.freedesktop.org, daniel.thompson@linaro.org, dri-devel@lists.freedesktop.org
List-Id: intel-gfx@lists.freedesktop.org
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=