From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
Subject: [PATCH 1/6] mm: always return EBUSY for invalid ranges in
 hmm_range_{fault, snapshot}
Date: Mon, 22 Jul 2019 11:44:21 +0200
Message-ID: <20190722094426.18563-2-hch@lst.de>
References: <20190722094426.18563-1-hch@lst.de>
Mime-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Return-path: <nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
In-Reply-To: <20190722094426.18563-1-hch-jcswGhMUV9g@public.gmane.org>
List-Unsubscribe: <https://lists.freedesktop.org/mailman/options/nouveau>,
 <mailto:nouveau-request-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org?subject=unsubscribe>
List-Archive: <https://lists.freedesktop.org/archives/nouveau>
List-Post: <mailto:nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
List-Help: <mailto:nouveau-request-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org?subject=help>
List-Subscribe: <https://lists.freedesktop.org/mailman/listinfo/nouveau>,
 <mailto:nouveau-request-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org?subject=subscribe>
Errors-To: nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Sender: "Nouveau" <nouveau-bounces-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>
To: =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= <jglisse-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Jason Gunthorpe <jgg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, Ben Skeggs <bskeggs-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Ralph Campbell <rcampbell-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>, nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, Felix Kuehling <Felix.Kuehling-5C7GfCeVMHo@public.gmane.org>, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dri-devel-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org
List-Id: dri-devel@lists.freedesktop.org
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