From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Price <steven.price@arm.com>
Subject: Re: [PATCH v2 5/8] drm/shmem: Use mutex_trylock in drm_gem_shmem_purge
Date: Fri, 23 Aug 2019 15:53:32 +0100
Message-ID: <1bffdb59-cb23-caa7-ce6c-111a1859f4f8@arm.com>
References: <20190823021216.5862-1-robh@kernel.org>
 <20190823021216.5862-6-robh@kernel.org>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"; Format="flowed"
Content-Transfer-Encoding: base64
Return-path: <dri-devel-bounces@lists.freedesktop.org>
Received: from foss.arm.com (foss.arm.com [217.140.110.172])
 by gabe.freedesktop.org (Postfix) with ESMTP id C4DA06ECB4
 for <dri-devel@lists.freedesktop.org>; Fri, 23 Aug 2019 14:53:35 +0000 (UTC)
In-Reply-To: <20190823021216.5862-6-robh@kernel.org>
Content-Language: en-GB
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>
To: Rob Herring <robh@kernel.org>, dri-devel@lists.freedesktop.org
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>, Maxime Ripard <maxime.ripard@bootlin.com>, Robin Murphy <robin.murphy@arm.com>, David Airlie <airlied@linux.ie>, Boris Brezillon <boris.brezillon@collabora.com>, Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>, Sean Paul <sean@poorly.run>
List-Id: dri-devel@lists.freedesktop.org
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