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Pull sound updates from Takashi Iwai:
"As the diffstat shows, we've had lots of developments in a wide range
at this time; the majority of changes are about ASoC, including
subsystem-wide cleanups, continued SOF / Intel updates and a bunch of
new drivers (as usual), while there have been some significant (but
almost invisible) improvements in ALSA core side, too.
Below are some highlights:
Core:
- Faster lookups of control elements with Xarray; normal user won't
notice, but on the devices with tons of control elements, it can be
visibly faster
- Support for input validation for controls; this will harden for
badly written drivers in general with a slight overhead
- Deferred async signal handling for working around the potential
deadlocks
- Cleanup / refactoring raw MIDI locking code
ASoC:
- Restructing of the set_fmt() callbacks for making things clearer in
situations like CODEC to CODEC links
- Clean up and modernizing the DAI naming scheme setups
- Merge of more of the Intel AVS driver stack, including some board
integrations
- New version 4 mechanism for communication with SOF DSPs
- Suppoort for dynamically selecting the PLL to use at runtime on
i.MX platforms
- Improvements for CODEC to CODEC support in the generic cards
- Support for AMD Jadeite and various machines, AMD RPL, Intel
MetorLake DSPs, Mediatek MT8186 DSPs and MT6366, nVidia Tegra
MDDRC, OPE and PEQ, NXP TFA9890, Qualcomm SDM845, WCD9335 and
WAS883x, and Texas Instruments TAS2780
HD- and USB-audio:
- Continued improvement for CS35L41 (sub)codec support
- More quirks for various devices (HP, Lenovo, Dell, Clevo)"
* tag 'sound-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (778 commits)
ALSA: hda/realtek: Add quirk for HP Spectre x360 15-eb0xxx
ALSA: line6: Replace sprintf() with sysfs_emit()
ALSA: hda: Replace sprintf() with sysfs_emit()
ALSA: pcm: Replace sprintf() with sysfs_emit()
ALSA: core: Replace scnprintf() with sysfs_emit()
ALSA: control-led: Replace sprintf() with sysfs_emit()
ALSA: aoa: Replace sprintf() with sysfs_emit()
ALSA: ac97: Replace sprintf() with sysfs_emit()
ALSA: hda/realtek: Add quirk for Clevo NV45PZ
ALSA: hda/realtek: Add quirk for Lenovo Yoga9 14IAP7
ALSA: control: Use deferred fasync helper
ALSA: pcm: Use deferred fasync helper
ALSA: timer: Use deferred fasync helper
ALSA: core: Add async signal helpers
ASoC: q6asm: use kcalloc() instead of kzalloc()
ACPI: scan: Add CLSA0101 Laptop Support
ALSA: hda: cs35l41: Support CLSA0101
ALSA: hda: cs35l41: Use the CS35L41 HDA internal define
ASoC: dt-bindings: use spi-peripheral-props.yaml
ASoC: codecs: va-macro: use fsgen as clock
...
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Pull driver core / kernfs updates from Greg KH:
"Here is the set of driver core and kernfs changes for 6.0-rc1.
The "biggest" thing in here is some scalability improvements for
kernfs for large systems. Other than that, included in here are:
- arch topology and cache info changes that have been reviewed and
discussed a lot.
- potential error path cleanup fixes
- deferred driver probe cleanups
- firmware loader cleanups and tweaks
- documentation updates
- other small things
All of these have been in the linux-next tree for a while with no
reported problems"
* tag 'driver-core-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (63 commits)
docs: embargoed-hardware-issues: fix invalid AMD contact email
firmware_loader: Replace kmap() with kmap_local_page()
sysfs docs: ABI: Fix typo in comment
kobject: fix Kconfig.debug "its" grammar
kernfs: Fix typo 'the the' in comment
docs: driver-api: firmware: add driver firmware guidelines. (v3)
arch_topology: Fix cache attributes detection in the CPU hotplug path
ACPI: PPTT: Leave the table mapped for the runtime usage
cacheinfo: Use atomic allocation for percpu cache attributes
drivers/base: fix userspace break from using bin_attributes for cpumap and cpulist
MAINTAINERS: Change mentions of mpm to olivia
docs: ABI: sysfs-devices-soc: Update Lee Jones' email address
docs: ABI: sysfs-class-pwm: Update Lee Jones' email address
Documentation/process: Add embargoed HW contact for LLVM
Revert "kernfs: Change kernfs_notify_list to llist."
ACPI: Remove the unused find_acpi_cpu_cache_topology()
arch_topology: Warn that topology for nested clusters is not supported
arch_topology: Add support for parsing sockets in /cpu-map
arch_topology: Set cluster identifier in each core/thread from /cpu-map
arch_topology: Limit span of cpu_clustergroup_mask()
...
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Pull documentation updates from Jonathan Corbet:
"This was a moderately busy cycle for documentation, but nothing
all that earth-shaking:
- More Chinese translations, and an update to the Italian
translations.
The Japanese, Korean, and traditional Chinese translations
are more-or-less unmaintained at this point, instead.
- Some build-system performance improvements.
- The removal of the archaic submitting-drivers.rst document,
with the movement of what useful material that remained into
other docs.
- Improvements to sphinx-pre-install to, hopefully, give more
useful suggestions.
- A number of build-warning fixes
Plus the usual collection of typo fixes, updates, and more"
* tag 'docs-6.0' of git://git.lwn.net/linux: (92 commits)
docs: efi-stub: Fix paths for x86 / arm stubs
Docs/zh_CN: Update the translation of sched-stats to 5.19-rc8
Docs/zh_CN: Update the translation of pci to 5.19-rc8
Docs/zh_CN: Update the translation of pci-iov-howto to 5.19-rc8
Docs/zh_CN: Update the translation of usage to 5.19-rc8
Docs/zh_CN: Update the translation of testing-overview to 5.19-rc8
Docs/zh_CN: Update the translation of sparse to 5.19-rc8
Docs/zh_CN: Update the translation of kasan to 5.19-rc8
Docs/zh_CN: Update the translation of iio_configfs to 5.19-rc8
doc:it_IT: align Italian documentation
docs: Remove spurious tag from admin-guide/mm/overcommit-accounting.rst
Documentation: process: Update email client instructions for Thunderbird
docs: ABI: correct QEMU fw_cfg spec path
doc/zh_CN: remove submitting-driver reference from docs
docs: zh_TW: align to submitting-drivers removal
docs: zh_CN: align to submitting-drivers removal
docs: ko_KR: howto: remove reference to removed submitting-drivers
docs: ja_JP: howto: remove reference to removed submitting-drivers
docs: it_IT: align to submitting-drivers removal
docs: process: remove outdated submitting-drivers.rst
...
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The current AMD contact info email address is incorrect, so fix it up to
use the correct one.
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Alex Shi <alexs@kernel.org>
Cc: Yanteng Si <siyanteng@loongson.cn>
Cc: Hu Haowen <src.res@email.cn>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20220729134517.2284700-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The instructions don't match with the current Thunderbird interface.
Clarification on using external extensions.
New information on how to avoid writing HTML emails.
Tell user to restart Thunderbird after modifications.
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sotir Danailov <sndanailov@gmail.com>
Link: https://lore.kernel.org/r/20220715211307.9358-1-sndanailov@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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ASoC: Updates for v5.20
This is a big release thus far and there will probably be more changes
to come, it's a combination of a larger than usual crop of new drivers
and some subsysetm wide cleanups from Charles rather than anything
structural. The SOF and Intel DSP code both also continue to be very
actively developed.
- Restructing of the set_fmt() callbacks to be specified in terms of
the device rather than with semantics depending on if the device is
supposed to be a CODEC or SoC, making things clearer in situations
like CODEC to CODEC links.
- Clean up of the way we flag which DAI naming scheme we use to reflect
the progress that's been made modernising things.
- Merge of more of the Intel AVS driver stack, including some board
integrations.
- New version 4 mechanism for communication with SOF DSPs.
- Suppoort for dynamically selecting the PLL to use at runtime on i.MX
platforms.
- Improvements for CODEC to CODEC support in the generic cards.
- Support for AMD Jadeite and various machines, Intel MetorLake DSPs,
Mediatek MT8186 DSPs and MT6366, nVidia Tegra MDDRC, OPE and PEQ, NXP
TFA9890, Qualcomm SDM845, WCD9335 and WAS883x, and Texas Instruments
TAS2780.
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Commit 31b24bee3357 ("docs: add a warning to submitting-drivers.rst")
in October 2016 already warns "This (...) should maybe just be deleted,
but I'm not quite ready to do that yet".
Maybe, six years ago, we were not ready but let us remove old content
for the better now and structure and maintain less content in the kernel
documentation with a better result.
Drop this already outdated document and adjust all textual references.
Here is an argument why deleting the content will not remove any useful
information to the existing kernel documentation, individually broken down
for each section.
Section "Allocating Device Numbers" refers to https://www.lanana.org/, and
then refers to Documentation/admin-guide/devices.rst.
However, the devices.rst clearly states:
"The version of this document at lanana.org is no longer maintained."
Everything needed for submitting drivers is already stated in devices.rst
and the reference to https://www.lanana.org/ is outdated, and should be
just deleted.
Section "Who To Submit Drivers To" is all about Linux 2.0 - 2.6, before
the new release version scheme; the mentioned developers are still around,
but actually not the first developers to contact anymore.
Section "What Criteria Determine Acceptance" has a few bullet points:
Licensing and Copyright is well-covered in process/kernel-license.rst.
Interfaces, Code, Portability, Clarity state some obvious things about
ensuring kernel code quality.
Control suggests to add a MAINTAINERS entry, which is already mentioned in
6.Followthrough.rst: "... added yourself to the MAINTAINERS file..."
PM support states a bit about implementing and testing power management of
a driver, it remains an open question where to place that in the process
documents. Driver developers interested in power management will find the
corresponding part on power management in the kernel documentation anyway.
In section "What Criteria Do Not Determine Acceptance", the points Vendor
and Author states something basic consequence of the kernel being an
open-source community software development. Probably no need to mention it
nowadays.
Section "Resources" lists resources that are also mentioned elsewhere more
central.
- Linux kernel tree and mailing list is mentioned in many places.
- https://lwn.net/Kernel/LDD3/ is mentioned in
Documentation/process/kernel-docs.rst.
- https://lwn.net/ is mentioned in:
- Documentation/process/8.Conclusion.rst
- Documentation/process/kernel-docs.rst
- https://kernelnewbies.org/ is mentioned in:
- Documentation/process/8.Conclusion.rst
- Documentation/process/kernel-docs.rst
- http://www.linux-usb.org/ is mentioned in
Documentation/driver-api/usb/usb.rst
- https://landley.net/kdocs/ols/2002/ols2002-pages-545-555.pdf
is mentioned in Documentation/process/kernel-docs.rst
- https://kernelnewbies.org/KernelJanitors is mentioned in
Documentation/process/howto.rst
- https://git-scm.com/ is mentioned in
- Documentation/process/2.Process.rst
- Documentation/process/7.AdvancedTopics.rst
- Documentation/process/howto.rst
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220704122537.3407-7-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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One section in submitting-drivers.rst was just a collection of references
to other external documentation. All except the one added in this commit
is already mentioned in kernel-docs or other places in the kernel
documentation.
Add Arjan van de Ven's article on How to NOT write kernel driver to this
index of further kernel documentation.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220704122537.3407-5-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Remove and rephrase statements that only make sense if a single author
exclusively would maintain this document, but we would really want to
consider this being a page maintained by the kernel community, as it is
placed in the kernel repository, and let us hope that more contributors
suggest some more documents.
Further, do some minor word-smithing.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220704122537.3407-4-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The original title comes from copying the content from a web page that
covered various mixed computer-science material. Within the kernel
documentation and its current structure, the title can be shortened.
Other titles considered, but not selected were:
- Index of More Kernel Documentation
- Further Kernel Documentation
- References to Further Kernel Documentation
Shorten the title.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220704122537.3407-3-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The documents on each section of this document are ordered by its
published date, from the newest to the oldest.
In the kernel-docs.rst, the references on each section of this document
are intended to be ordered by its published date, from the newest to the
oldest. The Linux Kernel Module Programming Guide was published in 2021;
so, it is placed at the top as the most recent publication after the
rolling-version "Linux Kernel Mailing List Glossary" reference.
Fixes: 630c8fa02f9a ("Documentation: Update details of The Linux Kernel Module Programming Guide")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20220704122537.3407-2-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Should the need for toolchain mitigations ever be necessary, add a group
for toolchain ambassadors.
Add Nick Desaulniers as LLVM's ambassador for the embargoed hardware
issues process.
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20220711181101.1559558-1-ndesaulniers@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Summarize the rules we see broken most often and which may
be less familiar to kernel devs who are used to working outside
of netdev.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Similarly to the 15 patch rule the reverse xmas tree is not
documented.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We had been asking people to avoid massive patch series but it does
not appear in the FAQ.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The alsa-project documentation is now part of the kernel docs,
the original links are long dead, update links.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Mark Brown <broonie@kernel.org>
Cc: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20220628165807.152191-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
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Bash 4.4, released in 2016, supports 'wait $!' to check the exit status
of a process substitution, but it seems too new.
Some people using older bash versions (on CentOS 7, Ubuntu 16.04, etc.)
reported an error like this:
./scripts/check-local-export: line 54: wait: pid 17328 is not a child of this shell
I used the process substitution to avoid a pipeline, which executes each
command in a subshell. If the while-loop is executed in the subshell
context, variable changes within are lost after the subshell terminates.
Fortunately, Bash 4.2, released in 2011, supports the 'lastpipe' option,
which makes the last element of a pipeline run in the current shell process.
Switch to the pipeline with 'lastpipe' solution, and also set 'pipefail'
to catch errors from ${NM}.
Add the bash requirement to Documentation/process/changes.rst.
Fixes: 31cb50b5590f ("kbuild: check static EXPORT_SYMBOL* by script instead of modpost")
Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Reported-by: Wang Yugui <wangyugui@e16-tech.com>
Tested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com> # LLVM-14 (x86-64)
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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Pull documentation updates from Jonathan Corbet:
"It was a moderately busy cycle for documentation; highlights include:
- After a long period of inactivity, the Japanese translations are
seeing some much-needed maintenance and updating.
- Reworked IOMMU documentation
- Some new documentation for static-analysis tools
- A new overall structure for the memory-management documentation.
This is an LSFMM outcome that, it is hoped, will help encourage
developers to fill in the many gaps. Optimism is eternal...but
hopefully it will work.
- More Chinese translations.
Plus the usual typo fixes, updates, etc"
* tag 'docs-5.19' of git://git.lwn.net/linux: (70 commits)
docs: pdfdocs: Add space for chapter counts >= 100 in TOC
docs/zh_CN: Add dev-tools/gdb-kernel-debugging.rst Chinese translation
input: Docs: correct ntrig.rst typo
input: Docs: correct atarikbd.rst typos
MAINTAINERS: Become the docs/zh_CN maintainer
docs/zh_CN: fix devicetree usage-model translation
mm,doc: Add new documentation structure
Documentation: drop more IDE boot options and ide-cd.rst
Documentation/process: use scripts/get_maintainer.pl on patches
MAINTAINERS: Add entry for DOCUMENTATION/JAPANESE
docs/trans/ja_JP/howto: Don't mention specific kernel versions
docs/ja_JP/SubmittingPatches: Request summaries for commit references
docs/ja_JP/SubmittingPatches: Add Suggested-by as a standard signature
docs/ja_JP/SubmittingPatches: Randy has moved
docs/ja_JP/SubmittingPatches: Suggest the use of scripts/get_maintainer.pl
docs/ja_JP/SubmittingPatches: Update GregKH links
Documentation/sysctl: document max_rcu_stall_to_panic
Documentation: add missing angle bracket in cgroup-v2 doc
Documentation: dev-tools: use literal block instead of code-block
docs/zh_CN: add vm numa translation
...
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Pull x86 build updates from Borislav Petkov:
- Add a "make x86_debug.config" target which enables a bunch of useful
config debug options when trying to debug an issue
- A gcc-12 build warnings fix
* tag 'x86_build_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Wrap literal addresses in absolute_pointer()
x86/configs: Add x86 debugging Kconfig fragment plus docs
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With Grant taking a prominent role in Linaro, I will take over as the
process ambassador for ARM w.r.t. embargoed hardware issues.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Grant Likely <grant.likely@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Explain that, when collecting list of people to Cc the patch,
scripts/get_maintainer.pl should be used on patches, not on the
directories. The behavior is quite different, because with "-f" on
a directory, the maintainers of individual files will not be shown.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220427185645.677039-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Add Darren Hart as Ampere Computing's ambassador for the embargoed
hardware issues process.
Signed-off-by: Darren Hart <darren@os.amperecomputing.com>
Link: https://lore.kernel.org/r/2e36a8e925bc958928b4afa189b2f876c392831b.1650995848.git.darren@os.amperecomputing.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The list appears to be grouped by type (silicon, software, cloud) and
mostly alphabetical within each group, with a few exceptions.
Before adding to it, cleanup the list to be alphabetical within the
groups, and use tabs consistently throughout the list.
Signed-off-by: Darren Hart <darren@os.amperecomputing.com>
Link: https://lore.kernel.org/r/ec574b5d55584a3adda9bd31b7695193636ff136.1650995848.git.darren@os.amperecomputing.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The reference to `explicit_in_reply_to` is pointless as when the
reference was added in the form of "#15" [1], Section 15) was "The
canonical patch format".
The reference of "#15" had not been properly updated in a couple of
reorganizations during the plain-text SubmittingPatches era.
Fix it by using `the_canonical_patch_format`.
[1]: 2ae19acaa50a ("Documentation: Add "how to write a good patch summary" to SubmittingPatches")
Signed-off-by: Akira Yokosawa <akiyks@gmail.com>
Fixes: 5903019b2a5e ("Documentation/SubmittingPatches: convert it to ReST markup")
Fixes: 9b2c76777acc ("Documentation/SubmittingPatches: enrich the Sphinx output")
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: stable@vger.kernel.org # v4.9+
Link: https://lore.kernel.org/r/64e105a5-50be-23f2-6cae-903a2ea98e18@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The file 'Documentation/process/changes.rst' states the listed
requirements are for the 4.x kernel version. However, there are
requirements updated for the 5.x version, as there might be in other
future versions. This patch updates it to 'latest' so the document won't
be outdated in the future.
Signed-off-by: Bruno Moreira-Guedes <codeagain@codeagain.dev>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The install target requires cpio to run the `kernel/gen_kheaders.sh`
script, but it's missing in the requirements list at
'Documentation/process/changes.rst'. This patch adds it to the list.
Signed-off-by: Bruno Moreira-Guedes <codeagain@codeagain.dev>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The kernel has a wide variety of debugging options to help catch
and squash bugs. However, new debugging is added all the time and
the existing options can be hard to find.
Add a Kconfig fragment with the debugging options which tip
maintainers expect to be used to test contributions.
This should make it easier for contributors to test their code and
find issues before submission.
[ bp: Add to "make help" output, fix DEBUG_INFO selection as pointed
out by Nathan Chancellor <nathan@kernel.org>. ]
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20220331175728.299103A0@davehans-spike.ostc.intel.com
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With Grant taking a prominent role in Linaro, I will take over as the
process ambassador for ARM w.r.t. embargoed hardware issues.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Grant Likely <grant.likely@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Extend the "Respond to review comments" section of "Submitting patches"
with reference to patch changelogs.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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The documentation for the tip tree is really in quite a similar
spirit to the netdev-FAQ. Move the netdev-FAQ to the process docs
as well.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Pull driver core updates from Greg KH:
"Here is the set of driver core changes for 5.18-rc1.
Not much here, primarily it was a bunch of cleanups and small updates:
- kobj_type cleanups for default_groups
- documentation updates
- firmware loader minor changes
- component common helper added and take advantage of it in many
drivers (the largest part of this pull request).
All of these have been in linux-next for a while with no reported
problems"
* tag 'driver-core-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (54 commits)
Documentation: update stable review cycle documentation
drivers/base/dd.c : Remove the initial value of the global variable
Documentation: update stable tree link
Documentation: add link to stable release candidate tree
devres: fix typos in comments
Documentation: add note block surrounding security patch note
samples/kobject: Use sysfs_emit instead of sprintf
base: soc: Make soc_device_match() simpler and easier to read
driver core: dd: fix return value of __setup handler
driver core: Refactor sysfs and drv/bus remove hooks
driver core: Refactor multiple copies of device cleanup
scripts: get_abi.pl: Fix typo in help message
kernfs: fix typos in comments
kernfs: remove unneeded #if 0 guard
ALSA: hda/realtek: Make use of the helper component_compare_dev_name
video: omapfb: dss: Make use of the helper component_compare_dev
power: supply: ab8500: Make use of the helper component_compare_dev
ASoC: codecs: wcd938x: Make use of the helper component_compare/release_of
iommu/mediatek: Make use of the helper component_compare/release_of
drm: of: Make use of the helper component_release_of
...
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Pull Kbuild update for C11 language base from Masahiro Yamada:
"Kbuild -std=gnu11 updates for v5.18
Linus pointed out the benefits of C99 some years ago, especially
variable declarations in loops [1]. At that time, we were not ready
for the migration due to old compilers.
Recently, Jakob Koschel reported a bug in list_for_each_entry(), which
leaks the invalid pointer out of the loop [2]. In the discussion, we
agreed that the time had come. Now that GCC 5.1 is the minimum
compiler version, there is nothing to prevent us from going to
-std=gnu99, or even straight to -std=gnu11.
Discussions for a better list iterator implementation are ongoing, but
this patch set must land first"
[1] https://lore.kernel.org/all/CAHk-=wgr12JkKmRd21qh-se-_Gs69kbPgR9x4C+Es-yJV2GLkA@mail.gmail.com/
[2] https://lore.kernel.org/lkml/86C4CE7D-6D93-456B-AA82-F8ADEACA40B7@gmail.com/
* tag 'kbuild-gnu11-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
Kbuild: use -std=gnu11 for KBUILD_USERCFLAGS
Kbuild: move to -std=gnu11
Kbuild: use -Wdeclaration-after-statement
Kbuild: add -Wno-shift-negative-value where -Wextra is used
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Pull overflow updates from Kees Cook:
"These changes come in roughly two halves: support of Gustavo A. R.
Silva's struct_size() work via additional helpers for catching
overflow allocation size calculations, and conversions of selftests to
KUnit (which includes some tweaks for UML + Clang):
- Convert overflow selftest to KUnit
- Convert stackinit selftest to KUnit
- Implement size_t saturating arithmetic helpers
- Allow struct_size() to be used in initializers"
* tag 'overflow-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
lib: stackinit: Convert to KUnit
um: Allow builds with Clang
lib: overflow: Convert to Kunit
overflow: Provide constant expression struct_size
overflow: Implement size_t saturating arithmetic helpers
test_overflow: Regularize test reporting output
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In recent times, the review cycle for stable releases have been changed.
In particular, there is release candidate phase between ACKing patches
and new stable release. Also, in case of failed submissions (fail to
apply to stable tree), manual backport (Option 3) have to be submitted
instead.
Update the release cycle documentation on stable-kernel-rules.rst to
reflect the above.
Cc: Sasha Levin <sashal@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220314113329.485372-4-bagasdotme@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The link to stable tree is redirected to
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git. Update
accordingly.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: stable@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220314113329.485372-6-bagasdotme@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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There is also stable release candidate tree. Mention it, however with a
warning that the tree is for testing purposes.
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Sasha Levin <sashal@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: stable@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220314113329.485372-5-bagasdotme@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Security patches have different handling than rest of patches for
review.
Enclose note paragraph about such patches in `.. note::` block.
Cc: Sasha Levin <sashal@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220314113329.485372-2-bagasdotme@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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During a patch discussion, Linus brought up the option of changing
the C standard version from gnu89 to gnu99, which allows using variable
declaration inside of a for() loop. While the C99, C11 and later standards
introduce many other features, most of these are already available in
gnu89 as GNU extensions as well.
An earlier attempt to do this when gcc-5 started defaulting to
-std=gnu11 failed because at the time that caused warnings about
designated initializers with older compilers. Now that gcc-5.1 is
the minimum compiler version used for building kernels, that is no
longer a concern. Similarly, the behavior of 'inline' functions changes
between gnu89 using gnu_inline behavior and gnu11 using standard c99+
behavior, but this was taken care of by defining 'inline' to include
__attribute__((gnu_inline)) in order to allow building with clang a
while ago.
Nathan Chancellor reported a new -Wdeclaration-after-statement
warning that appears in a system header on arm, this still needs a
workaround.
The differences between gnu99, gnu11, gnu1x and gnu17 are fairly
minimal and mainly impact warnings at the -Wpedantic level that the
kernel never enables. Between these, gnu11 is the newest version
that is supported by all supported compiler versions, though it is
only the default on gcc-5, while all other supported versions of
gcc or clang default to gnu1x/gnu17.
Link: https://lore.kernel.org/lkml/CAHk-=wiyCH7xeHcmiFJ-YgXUy2Jaj7pnkdKpcovt8fYbVFW3TA@mail.gmail.com/
Link: https://github.com/ClangBuiltLinux/linux/issues/1603
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Marco Elver <elver@google.com>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: David Sterba <dsterba@suse.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Reviewed-by: Alex Shi <alexs@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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The applying patches document
(Documentation/process/applying-patches.rst) mentions incremental stable
patches, but there is no example of how to apply them. Describe the
process.
While at it, remove note about incremental patches and move the external
link of 5.x.y incremental patches to "Where can I download patches?"
section.
Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://lore.kernel.org/r/20220307063340.256671-1-bagasdotme@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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As a follow-up to the UMN incident[1], the TAB took the responsibility
to document Researcher Guidelines so there would be a common place to
point for describing our expectations as a developer community.
Document best practices researchers should follow to participate
successfully with the Linux developer community.
[1] https://lore.kernel.org/lkml/202105051005.49BFABCE@keescook/
Co-developed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Jonathan Corbet <corbet@lwn.net>
Co-developed-by: Stefano Zacchiroli <zack@upsilon.cc>
Signed-off-by: Stefano Zacchiroli <zack@upsilon.cc>
Co-developed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Steve Rostedt <rostedt@goodmis.org>
Acked-by: Laura Abbott <labbott@kernel.org>
Reviewed-by: Julia Lawall <julia.lawall@inria.fr>
Reviewed-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220304181418.1692016-1-keescook@chromium.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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|
Add a section with a few rules of thumb about how
quickly developers should address regressions to
Documentation/process/handling-regressions.rst; additionally,
add a short paragraph about this to the companion document
Documentation/admin-guide/reporting-regressions.rst as well.
The rules of thumb were written after studying the quotes from Linus
found in handling-regressions.rst and especially influenced by
statements like "Users are literally the _only_ thing that matters" and
"without users, your program is not a program, it's a pointless piece of
code that you might as well throw away". The author interpreted those in
perspective to how the various Linux kernel series are maintained
currently and what those practices might mean for users running into a
regression on a small or big kernel update.
That for example lead to the paragraph starting with "Aim to get fixes
for regressions mainlined within one week after identifying the culprit,
if the regression was introduced in a stable/longterm release or the
devel cycle for the latest mainline release". Some might see this as
pretty high bar, but on the other hand something like that is needed to
not leave users out in the cold for too long -- which can quickly happen
when updating to the latest stable series, as the previous one is
normally stamped "End of Life" about three or four weeks after a new
mainline release. This makes a lot of users switch during this
timeframe. Any of them thus risk running into regressions not promptly
fixed; even worse, once the previous stable series is EOLed for real,
users that face a regression might be left with only three options:
(1) continue running an outdated and thus potentially insecure kernel
version from an abandoned stable series
(2) run the kernel with the regression
(3) downgrade to an earlier longterm series still supported
This is better avoided, as (1) puts users and their data in danger, (2)
will only be possible if it's a minor regression that doesn't interfere
with booting or serious usage, and (3) might be regression itself or
impossible on the particular machine, as the users might require drivers
or features only introduced after the latest longterm series branched
of.
In the end this lead to the aforementioned "Aim to fix regression within
one week" part. It's also the reason for the "Try to resolve any
regressions introduced in the current development cycle before its
end.".
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
CC: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/a7b717b52c0d54cdec9b6daf56ed6669feddee2c.1644994117.git.linux@leemhuis.info
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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|
Create two documents explaining various aspects around regression
handling and tracking; one is aimed at users, the other targets
developers.
The texts among others describes the first rule of Linux kernel
development and what it means in practice. They also explain what a
regression actually is and how to report one properly.
Both texts additionally provide a brief introduction to the bot the
kernel's regression tracker uses to facilitate the work, but mention the
use is optional.
To sum things up, provide a few quotes from Linus in the document for
developers to show how serious we take regressions.
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
Link: https://lore.kernel.org/r/34e56d3588f22d7e0b4d635ef9c9c3b33ca4ac04.1644994117.git.linux@leemhuis.info
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
|
|
In order to perform more open-coded replacements of common allocation
size arithmetic, the kernel needs saturating (SIZE_MAX) helpers for
multiplication, addition, and subtraction. For example, it is common in
allocators, especially on realloc, to add to an existing size:
p = krealloc(map->patch,
sizeof(struct reg_sequence) * (map->patch_regs + num_regs),
GFP_KERNEL);
There is no existing saturating replacement for this calculation, and
just leaving the addition open coded inside array_size() could
potentially overflow as well. For example, an overflow in an expression
for a size_t argument might wrap to zero:
array_size(anything, something_at_size_max + 1) == 0
Introduce size_mul(), size_add(), and size_sub() helpers that
implicitly promote arguments to size_t and saturated calculations for
use in allocations. With these helpers it is also possible to redefine
array_size(), array3_size(), flex_array_size(), and struct_size() in
terms of the new helpers.
As with the check_*_overflow() helpers, the new helpers use __must_check,
though what is really desired is a way to make sure that assignment is
only to a size_t lvalue. Without this, it's still possible to introduce
overflow/underflow via type conversion (i.e. from size_t to int).
Enforcing this will currently need to be left to static analysis or
future use of -Wconversion.
Additionally update the overflow unit tests to force runtime evaluation
for the pathological cases.
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Keith Busch <kbusch@kernel.org>
Cc: Len Baker <len.baker@gmx.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
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|
It's unclear from "Submitting Patches" documentation that Reported-by
is not supposed to be used against new features. (It's more clear
in the section 5.4 "Patch formatting and changelogs" of the "A guide
to the Kernel Development Process", where it suggests that change
should fix something existing in the kernel. Clarify the Reported-by
usage in the "Submitting Patches".
Reported-by: Florian Eckert <fe@dev.tdt.de>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20220127163258.48482-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
|
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Pull Kbuild updates from Masahiro Yamada:
- Add new kconfig target 'make mod2noconfig', which will be useful to
speed up the build and test iteration.
- Raise the minimum supported version of LLVM to 11.0.0
- Refactor certs/Makefile
- Change the format of include/config/auto.conf to stop double-quoting
string type CONFIG options.
- Fix ARCH=sh builds in dash
- Separate compression macros for general purposes (cmd_bzip2 etc.) and
the ones for decompressors (cmd_bzip2_with_size etc.)
- Misc Makefile cleanups
* tag 'kbuild-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (34 commits)
kbuild: add cmd_file_size
arch: decompressor: remove useless vmlinux.bin.all-y
kbuild: rename cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}
kbuild: drop $(size_append) from cmd_zstd
sh: rename suffix-y to suffix_y
doc: kbuild: fix default in `imply` table
microblaze: use built-in function to get CPU_{MAJOR,MINOR,REV}
certs: move scripts/extract-cert to certs/
kbuild: do not quote string values in include/config/auto.conf
kbuild: do not include include/config/auto.conf from shell scripts
certs: simplify $(srctree)/ handling and remove config_filename macro
kbuild: stop using config_filename in scripts/Makefile.modsign
certs: remove misleading comments about GCC PR
certs: refactor file cleaning
certs: remove unneeded -I$(srctree) option for system_certificates.o
certs: unify duplicated cmd_extract_certs and improve the log
certs: use $< and $@ to simplify the key generation rule
kbuild: remove headers_check stub
kbuild: move headers_check.pl to usr/include/
certs: use if_changed to re-generate the key when the key type is changed
...
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Explain Fixes: and Link: tags in Documentation/process/5.Posting.rst,
which are missing in this file for unknown reasons and only described in
Documentation/process/submitting-patches.rst.
Signed-off-by: Thorsten Leemhuis <linux@leemhuis.info>
CC: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Link: https://lore.kernel.org/r/c4a5f5e25fa84b26fd383bba6eafde4ab57c9de7.1641314856.git.linux@leemhuis.info
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Apparently, it was decided that trivial@kernel.org
is no longer used.
Link: https://lore.kernel.org/lkml/fe86efbd-4e03-76c8-55cf-dabd33e85823@infradead.org/
Co-developed-by: Joe Perches <joe@perches.com>
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20211214191415.GA19070@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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LLVM versions prior to 11.0.0 have a harder time with dead code
elimination, which can cause issues with commonly used expressions such
as BUILD_BUG_ON and the bitmask functions/macros in bitfield.h (see the
first two issues links below).
Whenever there is an issue within LLVM that has been resolved in a later
release, the only course of action is to gate the problematic
configuration or source code on the toolchain verson or raise the
minimum supported version of LLVM for building the kernel, as LLVM has a
limited support lifetime compared to GCC. GCC major releases will
typically see a few point releases across a two year period on average
whereas LLVM major releases are only supported until the next major
release and will only see one or two point releases within that
timeframe. For example, GCC 8.1 was released in May 2018 and GCC 8.5 was
released in May 2021, whereas LLVM 12.0.0 was released in April 2021 and
its only point release, 12.0.1, was released in July 2021, giving a
minimal window for fixes to be backported.
To resolve these build errors around improper dead code elimination,
raise the minimum supported version of LLVM for building the kernel to
11.0.0. Doing so is a more proper solution than mucking around with core
kernel macros that have always worked with GCC or disabling drivers for
using these macros in a proper manner. This type of issue may continue
to crop up and require patching, which creates more debt for bumping the
minimum supported version in the future.
This should have a minimal impact to distributions. Using a script to
pull several different Docker images and check the output of
'clang --version':
archlinux:latest: clang version 13.0.0
debian:oldoldstable-slim: clang version 3.8.1-24 (tags/RELEASE_381/final)
debian:oldstable-slim: clang version 7.0.1-8+deb10u2 (tags/RELEASE_701/final)
debian:stable-slim: Debian clang version 11.0.1-2
debian:testing-slim: Debian clang version 11.1.0-4
debian:unstable-slim: Debian clang version 11.1.0-4
fedora:34: clang version 12.0.1 (Fedora 12.0.1-1.fc34)
fedora:latest: clang version 13.0.0 (Fedora 13.0.0-3.fc35)
fedora:rawhide: clang version 13.0.0 (Fedora 13.0.0-5.fc36)
opensuse/leap:15.2: clang version 9.0.1
opensuse/leap:latest: clang version 11.0.1
opensuse/tumbleweed:latest: clang version 13.0.0
ubuntu:bionic: clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
ubuntu:latest: clang version 10.0.0-4ubuntu1
ubuntu:hirsute: Ubuntu clang version 12.0.0-3ubuntu1~21.04.2
ubuntu:rolling: Ubuntu clang version 13.0.0-2
ubuntu:devel: Ubuntu clang version 13.0.0-9
In every case, the distribution's version of clang is either older than
the current minimum supported version of LLVM 10.0.1 or equal to or
greater than the proposed 11.0.0 so nothing should change.
Another benefit of this change is LLVM=1 works better with arm64 and
x86_64 since commit f12b034afeb3 ("scripts/Makefile.clang: default to
LLVM_IAS=1") enabled the integrated assembler by default, which only
works well with clang 11+ (clang-10 required it to be disabled to
successfully build a kernel).
Link: https://github.com/ClangBuiltLinux/linux/issues/1293
Link: https://github.com/ClangBuiltLinux/linux/issues/1506
Link: https://github.com/ClangBuiltLinux/linux/issues/1511
Link: https://github.com/llvm/llvm-project/commit/fa496ce3c6774097080c8a9cb808da56f383b938
Link: https://groups.google.com/g/clang-built-linux/c/mPQb9_ZWW0s/m/W7o6S-QTBAAJ
Link: https://github.com/ClangBuiltLinux/misc-scripts
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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A report was made in https://github.com/acmel/dwarves/issues/26 about
pahole not being listed in the process/changes.rst file as being needed
for building the kernel, address that.
Link: https://github.com/acmel/dwarves/issues/26
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/YZPQ6+u2wTHRfR+W@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/YZfzQ0DvHD5o26Bt@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Instead link to the device tree document with the same name.
Signed-off-by: Erik Ekman <erik@kryo.se>
Link: https://lore.kernel.org/r/20211119200758.642474-1-erik@kryo.se
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
|
Linus Torvalds
Greg Kroah-Hartman
Sotir Danailov
Takashi Iwai
Lukas Bulwahn
Nick Desaulniers
Jakub Kicinski
Marek Vasut
Masahiro Yamada
Catalin Marinas
Krzysztof Kozlowski
Darren Hart
Akira Yokosawa
Bruno Moreira-Guedes
Dave Hansen
Bagas Sanjaya
Arnd Bergmann
Kees Cook
Thorsten Leemhuis
Andy Shevchenko
Miguel Ojeda
Nathan Chancellor
Arnaldo Carvalho de Melo
Erik Ekman