linux-kernel - provide generic support for uncached segements in dma-direct

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Date:   Tue, 30 Apr 2019 07:00:25 -0400
From:   Christoph Hellwig <hch@....de>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Ley Foon Tan <lftan@...era.com>,
        Michal Simek <monstr@...str.eu>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:     linux-mips@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: provide generic support for uncached segements in dma-direct

Hi all,

can you take a look at this series?  It lifts the support for mips-style
uncached segements to the dma-direct layer, thus removing the need
to have arch_dma_alloc/free routines for these architectures.