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Linux Kernel developer and maintainer
#standwithukraine 🇵🇱 🇪🇺 🇺🇦 🇨🇭
IRC: krzk
Kernel work related account. Other accounts of mine: @krzk@mastodon.social
krzk

Krzysztof Kozlowski

If you ever wondered how Linux kernel can handle multiple devices sharing the same GPIO, you got one more reason to go to Seattle this April:
https://sched.co/1aPvr

My second talk got accepted to LinuxCon / Open Source Summit NA 2024.
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Krzysztof Kozlowski

About current EU and Polish farmer protests, let's digest this meme. Left pic is from Poland, where Polish farmers protest with Soviet Union flag and banner saying:
"Puting clean up mess with Ukraine, Brussels and our government."

Right picture is from Ukraine (quite old btw)...
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Krzysztof Kozlowski

Reply to @airtower@woem.men
Edited 1 year ago
@airtower @pavel These are documents describing rules and the contribution process. These are not tutorials and they have never been such. They do not mention tools at all, e.g. people submit/manage patchsets with quilt, git or whatever. That's why there is no place for b4 there. You can use any tools...

Tutorials are for example:
https://people.kernel.org/monsieuricon/sending-a-kernel-patch-with-b4-part-1
https://www.youtube.com/watch?v=QBR06ml2YLQ&ab_channel=KonstantinRyabitsev
https://www.marcusfolkesson.se/blog/use-b4-for-kernel-contributions/
and others presented on conferences or on blogs...
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Krzysztof Kozlowski

Reply to @airtower@woem.men
@airtower @pavel b4 simplifies entire workflow with Linux contributions and it also makes sure that in certain aspects it is correct, e.g. CC-ing proper people, applying tags, providing versioning. We keep repeating it all the time, that all new contributors should use it. I think also all new tutorials rely on b4...
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Krzysztof Kozlowski

Reply to @airtower@woem.men
@airtower @pavel `b4 trailers -u -F ....` and don't worry about any orders or forgotten tags.
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monsieuricon

K. Ryabitsev 🍁

In the face of hundreds of thousands murdered in Ukraine, and millions more displaced fleeing Russian military aggression, it is hard to focus on the death of one man. And yet, Navalny meant a lot to the Russian opposition and his death is just another proof that Putin's regime is criminal to the core and cannot be dealt with by appeasement or backroom deals. Ukrainians are the only force actively fighting the Kremlin mafia regime and we should continue to give them all they need to achieve a swift and decisive victory.
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Krzysztof Kozlowski

Is DT schema validation of DTS boards helpful or not? Get ready to find it out during my talk on EOSS 2024 conference in April:
https://sched.co/1aBEf
See you in Seattle!
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Krzysztof Kozlowski

Reply to @gregkh
@gregkh I love the remark: "Because of this, the CVE assignment team is overly cautious and assign CVE numbers to any bugfix that they identify."! I hope my CV will be nice and beautiful with all my stable-target commits being translated into CVEs :)
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krzk

Krzysztof Kozlowski

Reply to @krzk
If you want to get something done, do it yourself.
https://lore.kernel.org/linux-devicetree/170626764360.50413.9381526885560837347.b4-ty@linaro.org/
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Krzysztof Kozlowski

10 years ago I sent a patch to fix one compatible in one Marvell SoC board:
https://lore.kernel.org/linux-devicetree/1410884282-18041-1-git-send-email-k.kozlowski@samsung.com/
Obvious fix but was never picked up.

In 2021 Sebastian tried to fix it:
https://lore.kernel.org/linux-devicetree/20210412230320.382885-2-sebastian.reichel@collabora.com/

Now in 2023 and 2024, Duje tries the same:
https://lore.kernel.org/linux-devicetree/20240125-brownstone-typo-fix-v2-1-45bc48a0c81c@skole.hr/

Will it succeed?
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Krzysztof Kozlowski

Reply to @Logical_Error@fosstodon.org
@Logical_Error No, but I hope someone someday will add it to clang-format for example.
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Krzysztof Kozlowski

Linux v6.8-rc1 comes with new document describing coding style for DTS (Devicetree sources):
https://www.kernel.org/doc/html/latest/devicetree/bindings/dts-coding-style.html

This marks the end of many unwritten rules, varying between subsystems and maintainers. At least, like with every coding style document, in theory. :)
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Krzysztof Kozlowski

Edited 1 year ago
I was always using git branch --edit-description && git format-patch && git send-email, but now I tried preparing and sending patchset with b4 (b4 prep && b4 send). It works great! It is trivial in use and really solves the workflow. I cannot understand why people still Cc wrong people or are unable to send one patchset properly threaded.

Edit: --edit-cover->--edit-description
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Krzysztof Kozlowski

Reply to @abelvesa
@abelvesa Great news!
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Krzysztof Kozlowski

Reply to @krzk
Phoronix also noticed it:
https://www.phoronix.com/news/Linux-6.8-GS101-SoC-Pixel-6
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abelvesa

Abel Vesa

FYI, Qualcomm Snapdragon X Elite (X1E80100) now boots to shell with today's -next.

More support is already sent on the list for review:
https://lore.kernel.org/all/?q=X1E80100

And here is a public branch with all support currently available on top of -next:
https://git.codelinaro.org/abel.vesa/linux/-/tree/x1e80100-next
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Krzysztof Kozlowski

Edited 1 year ago
Tensor is coming to the next Linux kernel: v6.8!
I just applied last patches for Linux kernel bringing support for the Google Tensor GS101 SoC (derivative of Samsung Exynos):
https://lore.kernel.org/linux-samsung-soc/170249498744.308886.17508790332822828341.b4-ty@linaro.org/T/#u

Commits will hit tomorrow's linux-next and probably next week I will send pull request with them to SoC (@arnd@society.oftrolls.com and Olof) for the next merge window. Good job Peter Griffin and @LinaroLtd :)
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Krzysztof Kozlowski

Reply to @partim@social.tchncs.de
@partim It's the state of the taste of German beer. Quality is not a problem. The taste is...
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q3k@social.hackerspace.pl

q3k blobcatcoffee

I can finally reveal some research I've been involved with over the past year or so.

We (@redford, @mrtick and I) have reverse engineered the PLC code of NEWAG Impuls EMUs. These trains were locking up for arbitrary reasons after being serviced at third-party workshops. The manufacturer argued that this was because of malpractice by these workshops, and that they should be serviced by them instead of third parti
es.

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Krzysztof Kozlowski

Reply to @hrw@society.oftrolls.com
@hrw It's there since six years (2017)...
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