linux-kernel - Re: [PATCH 16/67] powerpc: rename dma_direct_ to dma_nommu

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Date:   Thu, 4 Jan 2018 09:48:28 +0100
From:   Christoph Hellwig <hch@....de>
To:     Julian Calaby <julian.calaby@...il.com>
Cc:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Christoph Hellwig <hch@....de>,
        iommu@...ts.linux-foundation.org,
        Linux MIPS Mailing List <linux-mips@...ux-mips.org>,
        linux-ia64@...r.kernel.org,
        Linux-sh list <linux-sh@...r.kernel.org>,
        sparclinux <sparclinux@...r.kernel.org>,
        Guan Xuetao <gxt@...c.pku.edu.cn>,
        Linux-Arch <linux-arch@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        linux-c6x-dev@...ux-c6x.org,
        "open list:QUALCOMM HEXAGON..." <linux-hexagon@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        arcml <linux-snps-arc@...ts.infradead.org>,
        adi-buildroot-devel@...ts.sourceforge.net,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        patches@...ups.riscv.org,
        "open list:METAG ARCHITECTURE" <linux-metag@...r.kernel.org>,
        "Mailing List, Arm" <linux-arm-kernel@...ts.infradead.org>,
        Michal Simek <monstr@...str.eu>,
        Parisc List <linux-parisc@...r.kernel.org>,
        Cris <linux-cris-kernel@...s.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        alpha <linux-alpha@...r.kernel.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH 16/67] powerpc: rename dma_direct_ to dma_nommu_

On Wed, Jan 03, 2018 at 07:19:46PM +1100, Julian Calaby wrote:
> If this is indeed a linear mapping, can we just remove this and
> replace it with the new "generic" mapping being introduced by this
> patchset?

That is the long-term plan.  But as the powerpc one includes support
for non-coherent DMA it will have to wait for the next batch.