linux-kernel - Re: Phyr Starter

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Message-ID: <Yd2MeMT6LXWxJIDd@casper.infradead.org>
Date:   Tue, 11 Jan 2022 13:56:08 +0000
From:   Matthew Wilcox <willy@...radead.org>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     linux-kernel@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-rdma@...r.kernel.org, John Hubbard <jhubbard@...dia.com>,
        dri-devel@...ts.freedesktop.org, Ming Lei <ming.lei@...hat.com>,
        linux-block@...r.kernel.org, linux-mm@...ck.org,
        Jason Gunthorpe <jgg@...dia.com>, netdev@...r.kernel.org,
        Joao Martins <joao.m.martins@...cle.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Christoph Hellwig <hch@....de>
Subject: Re: Phyr Starter

On Tue, Jan 11, 2022 at 12:40:10PM +0100, Thomas Zimmermann wrote:
> Hi
> 
> Am 10.01.22 um 20:34 schrieb Matthew Wilcox:
> > TLDR: I want to introduce a new data type:
> > 
> > struct phyr {
> >          phys_addr_t addr;
> >          size_t len;
> > };
> 
> Did you look at struct dma_buf_map? [1]

Thanks.  I wasn't aware of that.  It doesn't seem to actually solve the
problem, in that it doesn't carry any length information.  Did you mean
to point me at a different structure?