linux-kernel - Re: fully convert arm to use dma-direct

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Message-ID: <CAK8P3a0mrbawriAE28pkFvdmMQKy3BUR72RtKiVwbEUNLxhx=Q@mail.gmail.com>
Date:   Thu, 21 Apr 2022 10:14:16 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Russell King <linux@...linux.org.uk>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andre Przywara <andre.przywara@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Gregory Clement <gregory.clement@...tlin.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        "open list:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        USB list <linux-usb@...r.kernel.org>
Subject: Re: fully convert arm to use dma-direct

On Thu, Apr 21, 2022 at 9:41 AM Christoph Hellwig <hch@....de> wrote:
>
> Hi all,
>
> arm is the last platform not using the dma-direct code for directly
> mapped DMA.  With the dmaboune removal from Arnd we can easily switch
> arm to always use dma-direct now (it already does for LPAE configs
> and nommu).  I'd love to merge this series through the dma-mapping tree
> as it gives us the opportunity for additional core dma-mapping
> improvements.

Thanks a lot for completing this, it looks all good to me, and I hope that
Russell can test my assabet patch to make sure this doesn't break
anything.

I saw one opportunity for an additional cleanup patch that I commented
on, but that does not stop the rest from getting merged.

I also made sure that this passes the basic kernelci tests across all
arm machines.

     Arnd