From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Subject: [PATCH] drm/i915: Don't call synchronize_rcu_expedited
	under struct_mutex
Date: Fri,  7 Apr 2017 12:00:39 +0300
Message-ID: <1491555639-10634-1-git-send-email-joonas.lahtinen@linux.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <intel-gfx-bounces@lists.freedesktop.org>
Received: from mga06.intel.com (mga06.intel.com [134.134.136.31])
 by gabe.freedesktop.org (Postfix) with ESMTPS id D88606EA99
 for <intel-gfx@lists.freedesktop.org>; Fri,  7 Apr 2017 09:00:45 +0000 (UTC)
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: Intel graphics driver community testing & development <intel-gfx@lists.freedesktop.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>, Daniel Vetter <daniel.vetter@ffwll.ch>, Jani Nikula <jani.nikula@intel.com>
List-Id: intel-gfx@lists.freedesktop.org
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