Hello Andrea, or anyone else affected,

Accepted lttng-modules into focal-proposed. The package will build now
and be available at https://launchpad.net/ubuntu/+source/lttng-
modules/2.12.2-1ubuntu1~20.04.1 in a few hours, and then in the
-proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Description changed:

+ [Impact]
+ 
  lttng-modules-dkms cannot be built anymore with kernels >= 5.8 (groovy).
  
  The error reported is the following:
  
  In file included from 
/var/lib/dkms/lttng-modules/2.12.2/build/probes/../probes/define_trace.h:87,
-                  from 
/var/lib/dkms/lttng-modules/2.12.2/build/probes/../instrumentation/events/lttng-module/writeback.h:755,
-                  from 
/var/lib/dkms/lttng-modules/2.12.2/build/probes/lttng-probe-writeback.c:38:
+                  from 
/var/lib/dkms/lttng-modules/2.12.2/build/probes/../instrumentation/events/lttng-module/writeback.h:755,
+                  from 
/var/lib/dkms/lttng-modules/2.12.2/build/probes/lttng-probe-writeback.c:38:
  
/var/lib/dkms/lttng-modules/2.12.2/build/probes/../probes/lttng-tracepoint-event-impl.h:131:6:
 error: conflicting types for ‘trace_writeback_queue_io’
  
  The fix is already available in the upstream git repository.
+ 
+ [Test case]
+ 
+ Build the dkms package on a >= 5.8 kernel.
+ 
+ [Where problems could occur]
+ 
+ The upstream lttng-modules project is compatible and buildable on all
+ >3.0 kernels. The new lttng-modules 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.
+ 
+ Therefore, it is more accurate to say there is a small potential for
+ regression on the 5.4 kernel - and that would likely indicate an
+ upstream bug in lttng-modules itself.

** Changed in: lttng-modules (Ubuntu Focal)
       Status: Incomplete => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1896077

Title:
  lttng-modules-dkms ADT test failure: build error with kernel >= 5.8

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