From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Authentication-Results: smtp.codeaurora.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="gyxa0lEX" DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A43C7606DD Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752226AbeFFMrE (ORCPT + 25 others); Wed, 6 Jun 2018 08:47:04 -0400 Received: from mail-lf0-f68.google.com ([209.85.215.68]:44785 "EHLO mail-lf0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751870AbeFFMrC (ORCPT ); Wed, 6 Jun 2018 08:47:02 -0400 X-Google-Smtp-Source: ADUXVKJe7CMoMbKboRpCtrabl/rlbqwUBkBIPUMxE5I4vbk0wflosb248hpx4oytsRNRbWF5OHG+SA== Subject: Re: [PATCH v2 9/9] xen/gntdev: Expose gntdev's dma-buf API for in-kernel use To: Boris Ostrovsky , dongwon.kim@intel.com, matthew.d.roper@intel.com Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, jgross@suse.com, konrad.wilk@oracle.com, daniel.vetter@intel.com, Oleksandr Andrushchenko References: <20180601114132.22596-1-andr2000@gmail.com> <20180601114132.22596-10-andr2000@gmail.com> <86f5b340-856c-204f-4ba7-dd51f1e92639@oracle.com> From: Oleksandr Andrushchenko Message-ID: <984bcf75-9bea-aceb-3d3a-62e3c65709c7@gmail.com> Date: Wed, 6 Jun 2018 15:46:58 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <86f5b340-856c-204f-4ba7-dd51f1e92639@oracle.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 06/05/2018 01:36 AM, Boris Ostrovsky wrote: > On 06/01/2018 07:41 AM, Oleksandr Andrushchenko wrote: >> From: Oleksandr Andrushchenko >> >> Allow creating grant device context for use by kernel modules which >> require functionality, provided by gntdev. Export symbols for dma-buf >> API provided by the module. > Can you give an example of who'd be using these interfaces? There is no use-case at the moment I can think of, but hyper dma-buf [1], [2] I let Intel folks (CCed) to defend this patch as it was done primarily for them and I don't use it in any of my use-cases. So, from this POV it can be dropped, at least from this series. > > -boris > [1] https://patchwork.freedesktop.org/series/38207/ [2] https://patchwork.freedesktop.org/patch/204447/