linux-kernel - Re: [PATCH 2/3] media/videobuf1|2: Mark follow

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Message-ID: <20210317072248.GA284559@infradead.org>
Date:   Wed, 17 Mar 2021 07:22:48 +0000
From:   Christoph Hellwig <hch@...radead.org>
To:     Daniel Vetter <daniel.vetter@...ll.ch>
Cc:     Christoph Hellwig <hch@...radead.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        LKML <linux-kernel@...r.kernel.org>,
        KVM list <kvm@...r.kernel.org>, Linux MM <linux-mm@...ck.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        "open list:DMA BUFFER SHARING FRAMEWORK" 
        <linux-media@...r.kernel.org>, Tomasz Figa <tfiga@...omium.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Kees Cook <keescook@...omium.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        John Hubbard <jhubbard@...dia.com>,
        J??r??me Glisse <jglisse@...hat.com>, Jan Kara <jack@...e.cz>,
        Pawel Osciak <pawel@...iak.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Michel Lespinasse <walken@...gle.com>
Subject: Re: [PATCH 2/3] media/videobuf1|2: Mark follow_pfn usage as unsafe

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.