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[Bug 1903952] Re: focal:linux-hwe-5.8 lttng-modules dkms failure

 

*** This bug is a duplicate of bug 1896077 ***
    https://bugs.launchpad.net/bugs/1896077

** This bug has been marked a duplicate of bug 1896077
   lttng-modules-dkms ADT test failure: build error with kernel >= 5.8

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https://bugs.launchpad.net/bugs/1903952

Title:
  focal:linux-hwe-5.8 lttng-modules dkms failure

Status in lttng-modules package in Ubuntu:
  New
Status in lttng-modules source package in Focal:
  New

Bug description:
  Impact: lttng-modules-dkms fail to build on Focal with the linux-
  hwe-5.8 kernel.

  Fix: Use version 2.12.2 instead of 2.11.2. That would bring it in line
  with the version used in groovy.

  Testcase: Attempt to build the currently-available 2.11.2 - observe
  that it fails. Create a new package using the groovy source package,
  confirm that it builds and installs successfully. Furthermore, I was
  able to successfully manually modprobe all the .ko files that were
  built.

  Regression potential: Technically this doesn't work on the 5.8 hwe kernel in focal right now, so it cannot be any more broken than it currently is. The 2.12.2 version is identical to the one currently used in groovy.
  EDIT: The upstream lttng-modules project is compatible and buildable on all >3.0 kernels. The new 2.12.2 code should continue to function fine on the 5.4 kernel.

  I confirmed that the this latest package builds and loads without any
  errors or warnings on the 5.4 kernel.

  So, there is a small potential for regression on the 5.4 kernel - that
  would likely indicate an upstream bug in lttng-modules itself.

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