From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: Re: [PATCH 4/4] drm/i915: Move ioremap_wc tracking onto VMA
Date: Wed, 20 Apr 2016 10:38:05 +0100
Message-ID: <20160420093805.GE14602@nuc-i3427.alporthouse.com>
References: <20160419123028.GI1990@wotan.suse.de>
 <1461069238-31539-1-git-send-email-chris@chris-wilson.co.uk>
 <1461069238-31539-4-git-send-email-chris@chris-wilson.co.uk>
 <20160420091054.GL1990@wotan.suse.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>, netdev@vger.kernel.org,
 intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org,
 Ingo Molnar <mingo@kernel.org>,
 "Peter Zijlstra \(Intel\)" <peterz@infradead.org>,
 dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org,
 Daniel Vetter <daniel.vetter@intel.com>,
 Dan Williams <dan.j.williams@intel.com>, Yishai Hadas <yishaih@mellanox.com>,
 David Hildenbrand <dahi@linux.vnet.ibm.com>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Content-Disposition: inline
In-Reply-To: <20160420091054.GL1990@wotan.suse.de>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/dri-devel>,
 <mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
Errors-To: dri-devel-bounces@lists.freedesktop.org
Sender: "dri-devel" <dri-devel-bounces@lists.freedesktop.org>
List-Id: netdev.vger.kernel.org
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==