From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chris Wilson <chris@chris-wilson.co.uk>
Subject: [PATCH] dma-buf: Use fence_get_rcu_safe() for
	retrieving the exclusive fence
Date: Mon, 14 Nov 2016 11:55:40 +0000
Message-ID: <20161114115540.31155-1-chris@chris-wilson.co.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/intel-gfx>,
 <mailto:intel-gfx-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <https://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: <https://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: dri-devel@lists.freedesktop.org
Cc: intel-gfx@lists.freedesktop.org, Sumit Semwal <sumit.semwal@linaro.org>
List-Id: intel-gfx@lists.freedesktop.org
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