linux-kernel - Re: use generic DMA mapping code in powerpc V4

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Date:   Wed, 12 Dec 2018 15:15:56 +0100
From:   Christoph Hellwig <hch@....de>
To:     Christian Zigotzky <chzigotzky@...osoft.de>
Cc:     Christoph Hellwig <hch@....de>, linux-arch@...r.kernel.org,
        Darren Stevens <darren@...vens-zone.net>,
        linux-kernel@...r.kernel.org, Julian Margetson <runaway@...dw.ms>,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        Paul Mackerras <paulus@...ba.org>,
        Olof Johansson <olof@...om.net>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: use generic DMA mapping code in powerpc V4

Thanks for bisecting.  I've spent some time going over the conversion
but can't really pinpoint it.  I have three little patches that switch
parts of the code to the generic version.  This is on top of the
last good commmit (977706f9755d2d697aa6f45b4f9f0e07516efeda).

Can you check with whіch one things stop working?



View attachment "0001-get_required_mask.patch" of type "text/x-patch" (776 bytes)

View attachment "0002-swiotlb-dma_supported.patch" of type "text/x-patch" (873 bytes)

View attachment "0003-nommu-dma_supported.patch" of type "text/x-patch" (833 bytes)

View attachment "0004-alloc-free.patch" of type "text/x-patch" (868 bytes)