Convert the mtd-physmap binding to DT schema format. The arm-versatile,
cypress,hyperflash and intel,ixp4xx-flash are all just an additional
compatible string, so they are all merged into the main schema.

There doesn't appear to be any users nor support for 'vendor-id' and
'device-id', so these have been dropped.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210607193500.3085920-1-robh@kernel.org

Convert the virtio-mmio binding to DT schema format.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: virtualization@lists.linux-foundation.org
Acked-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210607193928.3092186-1-robh@kernel.org/

The PL031 RTC binding has been in use for a long time, but never got
documented. Fortunately, it's simple and existing users are consistent.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: linux-rtc@vger.kernel.org
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210607193718.3090202-1-robh@kernel.org/

No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20210601062223.9724-1-thunder.leizhen@huawei.comSigned-off-by: Rob Herring <robh@kernel.org>

Correct the order of the descriptions for the "interrupts" property to
match the order of the "interrupt-names" property.

Fixes: 68989fe1 ("dt-bindings: usb: Convert cdns-usb3.txt to YAML schema")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Acked-by: Peter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20210527193952.1705127-1-geert@linux-m68k.orgSigned-off-by: Rob Herring <robh@kernel.org>

s/Hisilicon/HiSilicon/.
It should use capital S, according to the official website
https://www.hisilicon.com/en.
Signed-off-by: Hao Fang <fanghao11@huawei.com>
Link: https://lore.kernel.org/r/1621678997-15240-1-git-send-email-fanghao11@huawei.comSigned-off-by: Rob Herring <robh@kernel.org>

Currently the example provided in arm,mhuv2 schema complains as below:

    Documentation/devicetree/bindings/mailbox/arm,mhuv2.example.dt.yaml :0:0:
    /example-0/soc/scb@2e000000: failed to match any schema with compatible:
    ['fujitsu,mb86s70-scb-1.0']

Fix it by using an example with a matching schema that makes use of 4
mailboxes that is well suited to demonstrate Rx and Tx channels with both
doorbell and data transfer protocols.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210604205710.1944363-7-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Currently the example provided in arm,mhu schema complains as below:

    Documentation/devicetree/bindings/mailbox/arm,mhu.example.dt.yaml :0:0:
    /example-0/soc/scb@2e000000: failed to match any schema with compatible:
    ['fujitsu,mb86s70-scb-1.0']

Fix the same using examples based on Juno platform. The old SCPI firmware
used MHU with standard 32-bit data transfer protocol while the new SCMI
firmware uses MHU and expects to be used in doorbell mode. Update example
with SCPI and SCMI firmware nodes to demonstrate both 32-bit data transfer
and doorbell mode of MHU operations

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210604205710.1944363-6-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Convert the old text format binding for System Control and Management Interface
(SCMI) Message Protocol into the new and shiny YAML format.

Cc: Cristian Marussi <cristian.marussi@arm.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jim Quinlan <jim2101024@gmail.com>
Cc: Etienne Carriere <etienne.carriere@linaro.org>
Cc: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210604205710.1944363-5-sudeep.holla@arm.com
[robh: Rework interrupts schema and if/then]
Signed-off-by: Rob Herring <robh@kernel.org>

Convert/merge the existing text format SCPI binding additions for
amlogic,scpi into the common arm,scpi json scheme.

Couple of things to note:
"amlogic,meson-gxbb-scpi" is always used with "arm,scpi-pre-1.0" and
"amlogic,meson-gxbb-scpi-sensors" is used always with "arm,scpi-sensors"

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210604205710.1944363-4-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Convert the old text format binding for System Control and Power Interface
(SCPI) Message Protocol into the new and shiny YAML format.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210604205710.1944363-3-sudeep.holla@arm.com
[robh: Move fixed strings to 'properties', drop some literal block notations]
Signed-off-by: Rob Herring <robh@kernel.org>

Once the arm,scpi binding is converted to YAML format, the following
errors will be seen when doing `make DT_CHECKER_FLAGS=-m dt_binding_check`

From schema: Documentation/devicetree/bindings/firmware/arm,scpi.yaml
Documentation/devicetree/bindings/mailbox/arm,mhu.example.dt.yaml:
	scpi@2f000000: $nodename:0: 'scpi' was expected
Documentation/devicetree/bindings/mailbox/arm,mhu.example.dt.yaml:
	scpi@2f000000: reg: [[0, 788529152, 0, 512]] is not of type 'object'
Documentation/devicetree/bindings/mailbox/arm,mhu.example.dt.yaml:
	scpi@2f000000: 'shmem' is a required property

Fix those error following the SCPI bindings.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210604205710.1944363-2-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

of_address_to_resource() and of_pci_address_to_resource() are almost the
same except the former takes an index and the latter takes a BAR number.
Now that __of_get_address() can take either one, refactor the functions
to use a common implementation.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210527194547.1287934-5-robh@kernel.org

Convert address.c to use IS_ENABLED() instead of ifdefs for the
public PCI functions. This simplifies the ifdefs in of_address.h.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210527194547.1287934-4-robh@kernel.org

of_get_address() and of_get_pci_address() are the same implementation
except of_get_pci_address() takes the PCI BAR number rather than an
index. Modify the of_get_address() implementation to work on either
index or BAR and provide wrapper functions for the existing functions.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210527194547.1287934-3-robh@kernel.org

Add an empty stub for pci_register_io_range() when !CONFIG_PCI. It's needed
to convert of_pci_range_to_resource() to use IS_ENABLED(CONFIG_PCI).

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20210527194547.1287934-2-robh@kernel.org

fdt_init_reserved_mem() and fdt_reserved_mem_save_node() are private to
the DT code, so move there declarations to of_private.h. There's no need
for the dummy functions as CONFIG_OF_RESERVED_MEM is always enabled for
CONFIG_OF_EARLY_FLATTREE.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210527193841.1284169-1-robh@kernel.org

Reserved memory regions can be used for more than just DMA regions, so
only enabling on DMA_DECLARE_COHERENT (via HAS_DMA) or DMA_CMA is wrong.
This effectively doesn't matter except for the few cases arches select
NO_DMA.

At least, these users of RESERVEDMEM_OF_DECLARE depend on reserved memory
support:

arch/riscv/mm/init.c:RESERVEDMEM_OF_DECLARE(elfcorehdr, "linux,elfcorehdr", elfcore_hdr_setup);
drivers/memory/tegra/tegra210-emc-table.c:RESERVEDMEM_OF_DECLARE(tegra210_emc_table, "nvidia,tegra210-emc-table",
drivers/soc/fsl/qbman/bman_ccsr.c:RESERVEDMEM_OF_DECLARE(bman_fbpr, "fsl,bman-fbpr", bman_fbpr);
drivers/soc/fsl/qbman/qman_ccsr.c:RESERVEDMEM_OF_DECLARE(qman_fqd, "fsl,qman-fqd", qman_fqd);
drivers/soc/fsl/qbman/qman_ccsr.c:RESERVEDMEM_OF_DECLARE(qman_pfdr, "fsl,qman-pfdr", qman_pfdr);

Let's simplify things and enable OF_RESERVED_MEM when OF_EARLY_FLATTREE is
enabled.

Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210527223217.1572631-1-robh@kernel.org

Changeset 9a81b8cb ("dt-bindings: reset: Convert ti,sci-reset to json schema")
renamed: Documentation/devicetree/bindings/reset/ti,sci-reset.txt
to: Documentation/devicetree/bindings/reset/ti,sci-reset.yaml.

Update the cross-references accordingly.

Fixes: 9a81b8cb ("dt-bindings: reset: Convert ti,sci-reset to json schema")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/e9b505d900d898c0d030deb168ab291206c203ee.1622648507.git.mchehab+huawei@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Changeset a7dbfa6f ("dt-bindings: clock: Convert ti,sci-clk to json schema")
renamed: Documentation/devicetree/bindings/clock/ti,sci-clk.txt
to: Documentation/devicetree/bindings/clock/ti,sci-clk.yaml.

Update the cross-references accordingly.

Fixes: a7dbfa6f ("dt-bindings: clock: Convert ti,sci-clk to json schema")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/0fae687366c09dfb510425b3c88316a727b27d6d.1622648507.git.mchehab+huawei@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Changeset fda55c72 ("dt-bindings: soc: ti: Convert ti,sci-pm-domain to json schema")
renamed: Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
to: Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml.

Update the cross-references accordingly.

Fixes: fda55c72 ("dt-bindings: soc: ti: Convert ti,sci-pm-domain to json schema")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/c03020ff281054c3bd2527c510659e05fec6f181.1622648507.git.mchehab+huawei@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Changeset ce49e428 ("dt-bindings: power: supply: cpcap-charger: Convert to DT schema format")
renamed: Documentation/devicetree/bindings/power/supply/cpcap-charger.txt
to: Documentation/devicetree/bindings/power/supply/cpcap-charger.yaml.

Update its cross-reference accordingly.

Fixes: ce49e428 ("dt-bindings: power: supply: cpcap-charger: Convert to DT schema format")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/e9ce216362b7b9dcf84d707a3854247123440bf7.1622648507.git.mchehab+huawei@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Changeset 3c5be045 ("dt-bindings: power: supply: cpcap-battery: Convert to DT schema format")
renamed: Documentation/devicetree/bindings/power/supply/cpcap-battery.txt
to: Documentation/devicetree/bindings/power/supply/cpcap-battery.yaml.

Update its cross-reference accordingly.

Fixes: 3c5be045 ("dt-bindings: power: supply: cpcap-battery: Convert to DT schema format")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/1d0c8d50db22d9e5540a42be874fcd39fb7fc2a7.1622648507.git.mchehab+huawei@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

"amlogic,meson-gxbb-scp-shmem" is already in the Generic on-chip SRAM
binding though "amlogic,meson-gxbb-scpi" is missing which is now added.
Also remove the whole old text format binding for the same.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210601224904.917990-5-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Commit a90b15e0 ("Documentation: bindings: decouple juno specific
details from generic binding") moved the juno specific bindings into
separate file. Though there was no need for juno specific binding, it
has been used unfortunately for whatever stupid reason I added it for.

Let us move the same to the generic sram.yaml schema and remove the
old text format binding.

Cc: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210601224904.917990-4-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Move the SRAM and shared memory binding for SCMI into the existing
Generic on-chip SRAM. We just need to update the compatible list and
there-by remove the whole old text format binding for the same.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Cristian Marussi <cristian.marussi@arm.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210601224904.917990-3-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Move the SRAM and shared memory binding for SCPI into the existing
Generic on-chip SRAM. We just need to update the compatible list and
there-by remove the whole old text format binding for the same.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20210601224904.917990-2-sudeep.holla@arm.comSigned-off-by: Rob Herring <robh@kernel.org>

Convert the current OMAP Mailbox binding from text format to YAML
format/DT schema, and delete the legacy text binding file.

The new YAML binding conversion is an updated version compared to
the original. The descriptions for certain properties have been
improved to provide more clarity. Constraints are added to the
properties 'ti,mbox-num-users', 'ti,mbox-num-fifos' and 'interrupts'.
The 'ti,hwmods' is a legacy property and is retained only to reflect
the existing usage on some older OMAP2 and OMAP3 platforms.

All the existing examples have also been updated to reflect the
latest dts nodes (ti,hwmods removed from OMAP4 and AM33xx examples,
and interrupts value updated for AM65x SoCs).
Signed-off-by: Suman Anna <s-anna@ti.com>
[robh: Update ref in ti,omap-remoteproc.yaml]
Link: https://lore.kernel.org/r/20210520234348.4479-1-s-anna@ti.comSigned-off-by: Rob Herring <robh@kernel.org>

Add vendor prefix for StarFive Technology Co. Ltd [1]. StarFive was
formed in 2018 and has now produced their first SoC, the JH7100, which
contains 64-bit RISC-V cores [2]. It used in the BeagleV Starlight [3].

[1] https://starfivetech.com/site/company
[2] https://github.com/starfive-tech/beaglev_doc
[3] https://github.com/beagleboard/beaglev-starlightSigned-off-by: Drew Fustini <drew@beagleboard.org>
Link: https://lore.kernel.org/r/20210531070415.269667-1-drew@beagleboard.orgSigned-off-by: Rob Herring <robh@kernel.org>

The check for the board compatible should be limited only to the root
node.  Any other nodes with such compatible are not part of this schema
and should not match.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Daniele Alessandrelli <daniele.alessandrelli@intel.com>
Link: https://lore.kernel.org/r/20210526162750.135139-1-krzysztof.kozlowski@canonical.comSigned-off-by: Rob Herring <robh@kernel.org>

Convert the common MDIO mux bindings to DT schema.

Drop the example from mdio-mux.yaml as mdio-mux-gpio.yaml has the same one.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Ray Jui <rjui@broadcom.com>
Cc: Scott Branden <sbranden@broadcom.com>
Cc: bcm-kernel-feedback-list@broadcom.com
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20210526181411.2888516-1-robh@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Straight conversion of the txt file using the mux-consumer.yaml
binding now that is available.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Peter Rosin <peda@axentia.se>
[robh: Drop quotes and $ref for mux-controls]
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210522112908.1611389-3-jic23@kernel.org

Use the i2c-mux.yaml schema in the maxim,max9286 binding schema. With this,
several properties can be dropped as they are defined in i2c-mux.yaml
already.

Cc: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210526184839.2937899-7-robh@kernel.org

Convert the i2c-mux-pca954x binding to DT schema format.

Add the missing compatible for 'nxp,pca9645' which is already in use.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210526184839.2937899-6-robh@kernel.org

As some of the example I2C devices don't have schemas yet, change them to
ones that do.

Cc: Peter Rosin <peda@axentia.se>
Acked-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210526184839.2937899-5-robh@kernel.org

Convert the mux controller bindings to DT schema.

Cc: Peter Rosin <peda@axentia.se>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Wolfram Sang <wsa@kernel.org>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210526184839.2937899-4-robh@kernel.org

Convert the Philips PCF8563/Epson RTC8564 binding to DT schema format.

Add 'interrupts' and 'wakeup-source' as this device has an interrupt
which was not documented, but in use. Add 'start-year' as well.

Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210526184839.2937899-3-robh@kernel.org

The ti,j721e-system-controller binding does not follow the standard mux
controller node name 'mux-controller' and the example is incomplete. Fix
these to avoid schema errors before the mux controller binding is
converted to schema.

Cc: Lee Jones <lee.jones@linaro.org>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210526184839.2937899-2-robh@kernel.org

Add RNG binding for MT8365 SoC.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Link: https://lore.kernel.org/r/20210520111656.66017-2-fparent@baylibre.comSigned-off-by: Rob Herring <robh@kernel.org>

Convert the RNG binding for MediaTek to use YAML schema.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Link: https://lore.kernel.org/r/20210520111656.66017-1-fparent@baylibre.comSigned-off-by: Rob Herring <robh@kernel.org>