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[Massimiliano Pellizzer <2096645@xxxxxxxxxxxxxxxxxx>]

The debdiff in attach backports noble-release package to Jammy.
The backport allows to build and load the dkms correctly on both Jammy-GA and Jammy-HWE

Jammy-GA:
$ dkms status
lttng-modules/2.13.11, 5.15.0-130-generic, x86_64: installed
$ sudo modprobe lttng-test
$ lsmod | grep lttng
lttng_test		28672  0
lttng_probe_writeback	61440  0
lttng_probe_workqueue	16384  0
lttng_probe_v4l2	16384  0
lttng_probe_vmscan	40960  0
lttng_probe_udp		16384  0
lttng_probe_timer	32768  0
lttng_probe_sunrpc	20480  0
lttng_probe_statedump	49152  0
lttng_probe_sock	16384  0
...

Jammy-HWE:
$ dkms status
lttng-modules/2.13.11, 6.8.0-51-generic, x86_64: installed
$ sudo modprobe lttng-test
$ lsmod | grep lttng
lttng_test		28672  0
lttng_probe_writeback	61440  0
lttng_probe_workqueue	20480  0
lttng_probe_vmscan	45056  0
lttng_probe_udp		12288  0
lttng_probe_timer	32768  0
lttng_probe_sunrpc	20480  0
lttng_probe_statedump	57344  0
lttng_probe_sock	16384  0
...

** Patch added: "lttng-modules-dkms-support-jammy-6.8.debdiff"
   https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/2096645/+attachment/5853698/+files/lttng-modules-dkms-support-jammy-6.8.debdiff

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https://bugs.launchpad.net/bugs/2096645

Title:
  lttng DKMS failed to build on Jammy in sru-20250113 (error:
  conflicting types for 'trace_mm_page_alloc_zone_locked')

Status in ubuntu-kernel-tests:
  New
Status in lttng-modules package in Ubuntu:
  Invalid
Status in lttng-modules source package in Jammy:
  New

Bug description:
  Issue found with Jammy 5.15.0-132.143 in sru-20250113

  Module build failed with:
     CC [M]  /var/lib/dkms/lttng-modules/2.13.8/build/src/lib/ringbuffer/ring_buffer_iterator.o
     CC [M]  /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.o
   In file included from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/lttng/define_trace.h:87,
                    from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/instrumentation/events/kmem.h:570,
                    from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.c:35:
   /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/lttng/tracepoint-event-impl.h:133:6: error: conflicting types for 'trace_mm_page_alloc_zone_locked'; have 'void(struct page *, unsigned int,  int)'
     133 | void trace_##_name(_proto);
         |      ^~~~~~
   /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/../../include/instrumentation/events/kmem.h:438:1: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP'
     438 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(kmem_mm_page, mm_page_alloc_zone_locked,
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from ./include/trace/events/kmem.h:9,
                    from /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.c:24:
   ./include/linux/tracepoint.h:244:28: note: previous definition of 'trace_mm_page_alloc_zone_locked' with type 'void(struct page *, unsigned int,  int,  int)'
     244 |         static inline void trace_##name(proto)                          \
         |                            ^~~~~~
   ./include/linux/tracepoint.h:416:9: note: in expansion of macro '__DECLARE_TRACE'
     416 |         __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),              \
         |         ^~~~~~~~~~~~~~~
   ./include/linux/tracepoint.h:539:9: note: in expansion of macro 'DECLARE_TRACE'
     539 |         DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
         |         ^~~~~~~~~~~~~
   ./include/trace/events/kmem.h:259:1: note: in expansion of macro 'DEFINE_EVENT'
     259 | DEFINE_EVENT(mm_page, mm_page_alloc_zone_locked,
         | ^~~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:297: /var/lib/dkms/lttng-modules/2.13.8/build/src/probes/lttng-probe-kmem.o] Error 1

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