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Date:   Mon, 10 Oct 2022 18:57:42 +0100
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Christoph Hellwig <hch@lst.de>, Sumit Garg <sumit.garg@linaro.org>,
        Phil Chang =?utf-8?B?KOW8teS4luWLsyk=?= 
        <Phil.Chang@mediatek.com>,
        "ira.weiny@intel.com" <ira.weiny@intel.com>,
        Jens Wiklander <jens.wiklander@linaro.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        "Fabio M. De Francesco" <fmdefrancesco@gmail.com>,
        "op-tee@lists.trustedfirmware.org" <op-tee@lists.trustedfirmware.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH 2/4] tee: Remove vmalloc page support
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On Mon, Oct 10, 2022 at 10:20:15AM -0700, Linus Torvalds wrote:
> On Mon, Oct 10, 2022 at 12:42 AM Christoph Hellwig <hch@lst.de> wrote:
> >
> > I suspect the best long term option would be to just pass an iov_iter..
> 
> Hmm. Yeah, that sounds like a workable model, and solves the problem
> JensW pointed out with my simplistic "just pass a page array" approach
> where you also need to keep track of how to release things.

Except that then you need to get iov_iter_get_pages analogue that would
work for ITER_KVEC, which is exact same problem right back.