Re: [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset

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To: Jim Quinlan <james.quinlan@xxxxxxxxxxxx>
Subject: Re: [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset
From: Christoph Hellwig <hch@xxxxxx>
Date: Thu, 3 Sep 2020 18:06:04 +0200
Cc: Rich Felker <dalias@xxxxxxxx>, "open list:SUPERH" <linux-sh@xxxxxxxxxxxxxxx>, David Airlie <airlied@xxxxxxxx>, "open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS" <linux-pci@xxxxxxxxxxxxxxx>, Hanjun Guo <guohanjun@xxxxxxxxxx>, "open list:REMOTE PROCESSOR \(REMOTEPROC\) SUBSYSTEM" <linux-remoteproc@xxxxxxxxxxxxxxx>, Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>, Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, "open list:STAGING SUBSYSTEM" <devel@xxxxxxxxxxxxxxxxxxxx>, Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>, Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>, Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>, "open list:ACPI FOR ARM64 \(ACPI/arm64\)" <linux-acpi@xxxxxxxxxxxxxxx>, Frank Rowand <frowand.list@xxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, "maintainer:X86 ARCHITECTURE \(32-BIT AND 64-BIT\)" <x86@xxxxxxxxxx>, Russell King <linux@xxxxxxxxxxxxxxx>, Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>, Chen-Yu Tsai <wens@xxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" <bcm-kernel-feedback-list@xxxxxxxxxxxx>, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>, Len Brown <lenb@xxxxxxxxxx>, Ohad Ben-Cohen <ohad@xxxxxxxxxx>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" <devicetree@xxxxxxxxxxxxxxx>, Dan Williams <dan.j.williams@xxxxxxxxx>, Maxime Ripard <mripard@xxxxxxxxxx>, Rob Herring <robh+dt@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, "open list:DRM DRIVERS FOR ALLWINNER A10" <dri-devel@xxxxxxxxxxxxxxxxxxxxx>, Yong Deng <yong.deng@xxxxxxxxxxxx>, Santosh Shilimkar <ssantosh@xxxxxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>, "moderated list:ARM PORT" <linux-arm-kernel@xxxxxxxxxxxxxxxxxxx>, Felipe Balbi <balbi@xxxxxxxxxx>, Saravana Kannan <saravanak@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "open list:USB SUBSYSTEM" <linux-usb@xxxxxxxxxxxxxxx>, "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>, open list <linux-kernel@xxxxxxxxxxxxxxx>, Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx>, "open list:IOMMU DRIVERS" <iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Daniel Vetter <daniel@xxxxxxxx>, Sudeep Holla <sudeep.holla@xxxxxxx>, "open list:ALLWINNER A10 CSI DRIVER" <linux-media@xxxxxxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
In-reply-to: <CA+-6iNw1rSJOjQDDEYdB3Y1S5KOjOULANbmsDVBM4Mr4Uifomw@mail.gmail.com>
References: <20200824193036.6033-1-james.quinlan@broadcom.com> <20200824193036.6033-8-james.quinlan@broadcom.com> <20200901082429.GA1440@lst.de> <CA+-6iNw1rSJOjQDDEYdB3Y1S5KOjOULANbmsDVBM4Mr4Uifomw@mail.gmail.com>
User-agent: Mutt/1.5.17 (2007-11-01)

FYI, I've moved it off for-next and into its own dma-ranges branch
for now until we sort out the regressions.  I still hope to bring it
back soon.
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References:
- [PATCH v11 00/11] PCI: brcmstb: enable PCIe for STB chips
  - From: Jim Quinlan
- [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset
  - From: Jim Quinlan
- Re: [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset
  - From: Christoph Hellwig
- Re: [PATCH v11 07/11] device-mapping: Introduce DMA range map, supplanting dma_pfn_offset
  - From: Jim Quinlan

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