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Date:   Mon, 28 Jun 2021 18:33:12 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Rob Landley <rob@landley.net>
Cc:     Christoph Hellwig <hch@lst.de>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Rich Felker <dalias@libc.org>, linux-sh@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: dma_declare_coherent_memory and SuperH
Message-ID: <20210628163312.GA29659@lst.de>
References: <20210623133205.GA28589@lst.de> <1a55cf69-8fe1-dca0-68c7-f978567f9ca0@landley.net> <20210628133858.GA21602@lst.de> <4d6b7c35-f2fa-b476-b814-598a812770e6@landley.net> <20210628134955.GA22559@lst.de> <1141b20f-7cdf-1477-ef51-876226db7a37@landley.net>
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On Mon, Jun 28, 2021 at 09:29:59AM -0500, Rob Landley wrote:
> > No.  My hope is to kill dma_declarare_coherent, an API for board
> > support files to declare device-specific regions to be used for
> > coherent DMA.
> 
> Q) If I haven't got regression test hardware to make sure I properly converted
> each of these entire boards to device tree, Is there anything else I can do to
> help you remove this function from common code, such as inlining some portion of
> this function?
> 
> A) You can convert the board to device tree.
> 
> Which part of this exchange have I misunderstood?

The part that there is no easy way out without the device tree
conversion.