From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Yang, Philip" <Philip.Yang-5C7GfCeVMHo@public.gmane.org>
Subject: [PATCH 2/3] drm/amdkfd: avoid HMM change cause circular lock
 dependency v2
Date: Wed, 6 Feb 2019 16:26:14 +0000
Message-ID: <20190206162556.11512-3-Philip.Yang@amd.com>
References: <20190206162556.11512-1-Philip.Yang@amd.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
In-Reply-To: <20190206162556.11512-1-Philip.Yang-5C7GfCeVMHo@public.gmane.org>
Content-Language: en-US
Content-ID: <EC91CFDCDCDDA34FAAB177571DE77C27-asWib9pRmPqcE4WynfumptQqCkab/8FMAL8bYrjMMd8@public.gmane.org>
List-Id: Discussion list for AMD gfx <amd-gfx.lists.freedesktop.org>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/amd-gfx>,
 <mailto:amd-gfx-request-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/amd-gfx>
List-Post: <mailto:amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
List-Help: <mailto:amd-gfx-request-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/amd-gfx>,
 <mailto:amd-gfx-request-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org?subject=subscribe>
Errors-To: amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Sender: "amd-gfx" <amd-gfx-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
To: "amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org" <amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
Cc: "Yang, Philip" <Philip.Yang-5C7GfCeVMHo@public.gmane.org>
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