From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5AC95C433E0 for ; Wed, 17 Mar 2021 07:23:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9C91B64F07 for ; Wed, 17 Mar 2021 07:23:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9C91B64F07 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 198BC6B006E; Wed, 17 Mar 2021 03:23:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 14A156B0070; Wed, 17 Mar 2021 03:23:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id F2CAB6B0071; Wed, 17 Mar 2021 03:23:03 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0159.hostedemail.com [216.40.44.159]) by kanga.kvack.org (Postfix) with ESMTP id D9CED6B006E for ; Wed, 17 Mar 2021 03:23:03 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 8FDD5181AF5F7 for ; Wed, 17 Mar 2021 07:23:03 +0000 (UTC) X-FDA: 77928524646.28.4E6A273 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf05.hostedemail.com (Postfix) with ESMTP id B4621E0011D9 for ; Wed, 17 Mar 2021 07:23:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=VgWremH0I10zTIm6kNKr7I2+jlh/Pgq8sbo0UnUFG0E=; b=EfM8/Q3qa7owXrxD2xbByTMBCc UUhCwPxAvE3Qk7tC5abxDLcA9s5y2ZKUPGF5hWctwYKb4Nn2nX04O4+uaY+ZLbGh4YfR/oJTx/q4B /7i++JYLd03hMb5X7tbEoXnY/CeLk88Q1DAzIiCQ4wyiMEx0gFta3wGDp9wO/I01tnKk0eCkP5ds2 1TRRkJ5dwk6DTrqIfCQlcBYjRdqkEZn+U1ADNC7qlhKZZUDT+ee5BIW6rr89U0o8640JvoEHVxuh1 /P7Sg724uFmxdbapDmMOr71b0Nh9XTVcei7a4V/hvQsdGJGzYw8OCfw2U3qWhTJ6y+8d31Yo41GV5 SmA58zaA==; Received: from hch by casper.infradead.org with local (Exim 4.94 #2 (Red Hat Linux)) id 1lMQW0-001Ckh-8P; Wed, 17 Mar 2021 07:22:49 +0000 Date: Wed, 17 Mar 2021 07:22:48 +0000 From: Christoph Hellwig To: Daniel Vetter Cc: Christoph Hellwig , DRI Development , LKML , KVM list , Linux MM , Linux ARM , linux-samsung-soc , "open list:DMA BUFFER SHARING FRAMEWORK" , Tomasz Figa , Hans Verkuil , Daniel Vetter , Jason Gunthorpe , Kees Cook , Dan Williams , Andrew Morton , John Hubbard , J??r??me Glisse , Jan Kara , Pawel Osciak , Marek Szyprowski , Kyungmin Park , Laurent Dufour , Vlastimil Babka , Daniel Jordan , Michel Lespinasse Subject: Re: [PATCH 2/3] media/videobuf1|2: Mark follow_pfn usage as unsafe Message-ID: <20210317072248.GA284559@infradead.org> References: <20210316153303.3216674-1-daniel.vetter@ffwll.ch> <20210316153303.3216674-3-daniel.vetter@ffwll.ch> <20210316154549.GA60450@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-Stat-Signature: pzkjkm8xjg47ye6d1omx4huhnny8pbkf X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B4621E0011D9 Received-SPF: none (casper.srs.infradead.org>: No applicable sender policy available) receiver=imf05; identity=mailfrom; envelope-from=""; helo=casper.infradead.org; client-ip=90.155.50.34 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615965782-919855 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Mar 16, 2021 at 04:52:44PM +0100, Daniel Vetter wrote: > My understanding is mostly, but with some objections. And I kinda > don't want to let this die in a bikeshed and then not getting rid of > follow_pfn as a result. There's enough people who acked this, and the > full removal got some nack from Mauro iirc. Hmm, ok I must have missed that. I defintively prefer your series over doing nothing, but killing the dead horse ASAP would be even better.