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I'm trying to get the Linux 4.14.85 kernel, for a problem I've posted before, related to Xenomai.

I see here that there is a branch for 4.14.y, but there are no tags to find which commit corresponds to the 4.14.85 version. Basically, I'm following the instructions provided here but I want to use the most up-to-date versions.

How can I find the appropriate commit to revert to it? Where should I look for it?

I will appreciate any tips or help you can provide.

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2 Answers 2

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Go to https://GitHub.com/hexxeh/rpi-firmware and look at the commits.

The last commit @ 4.14.85 is eefe4b161f5e9730183c8dc1605e14c85b15cf51

So that gives you a commit id to use with the rpi-update script.

Run PRUNE_MODULES=1 rpi-update eefe4b161f5e9730183c8dc1605e14c85b15cf51 && reboot and you'll be back on the kernel from Dec 5, 2018.

I won't ask why the stable 4.14.98 kernel you'd get with apt update; apt install raspberrypi-kernel isn't working for you because I guess you have a sound reason for reverting to something historic.

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  • Hi @Dougie, thank you very much for your answer. Will getting it from github.com/hexxeh/rpi-firmware still allow me to patch the kernel with ipipe?
    – David
    Commented Mar 4, 2019 at 11:43
  • I tried this method, but I couldn't find the source files inside the Raspberry Pi (which I would need to patch the kernel with Xenomai). Instead, I am following the instructions in the Raspberry Pi website to build the kernel.
    – David
    Commented Mar 5, 2019 at 14:54
  • There's another script rpi-source which will pull the matching source tree for you. github.com/notro/rpi-source
    – Dougie
    Commented Mar 5, 2019 at 23:13
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EDIT

An easier way to achieve this is to use git log --follow Makefile and from there scroll until you find the version you desire.

ORIGINAL ANSWER

The only way I managed to find the commit was by manually scrolling through branch rpi-4.14.y's commits until I got the correct one. The Makefile indicates the commit's version, patch level, and sublevel. With that information, I found it in this page and here is the commit for 4.14.85.

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  • git log -S 'SUBLEVEL = 85' rpi-4.19.y should also show you a list of commits with that patch number
    – flaviut
    Commented Mar 2, 2019 at 23:01
  • Thanks @user60561, I tried this but I didn't get any results back. The terminal just stays idle.
    – David
    Commented Mar 4, 2019 at 12:28

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