From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Subject: Re: [PATCH] dma-fence: Serialise signal enabling
 (dma_fence_enable_sw_signaling)
Date: Fri, 4 Oct 2019 11:18:39 +0100
Message-ID: <63083a9e-7b6e-f620-fbdc-2e7c8eac1df3@linux.intel.com>
References: <20191003210100.22250-2-chris@chris-wilson.co.uk>
 <20191004101140.32713-1-chris@chris-wilson.co.uk>
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: <20191004101140.32713-1-chris@chris-wilson.co.uk>
Content-Language: en-US
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: Chris Wilson <chris@chris-wilson.co.uk>, intel-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
List-Id: dri-devel@lists.freedesktop.org
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