** Changed in: lttng-modules (Ubuntu)
     Assignee: (unassigned) => Marcelo Cerri (mhcerri)

** Changed in: lttng-modules (Ubuntu)
       Status: New => In Progress

** Description changed:

+ [Impact]
+ The DKMS package won't work with new kernels on bionic.
+ 
+ [Test case]
+ Install and load the modules.
+ 
+ [Regression potential]
+ This might break the functioning of the module.
+ 
+ -----------------------------------
+ 
  Module failed to build on B-hwe-edge (5.3.0):
  
-  DKMS make.log for lttng-modules-2.10.8 for kernel 5.3.0-12-generic (i686)
-  Fri Sep 20 03:27:45 UTC 2019
-  make: Entering directory '/usr/src/linux-headers-5.3.0-12-generic'
-  find: '/var/lib/dkms/lttng-modules/2.10.8/build/extra_version/patches/': No 
such file or directory
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-discard.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-overwrite.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-metadata-client.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-mmap-discard.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-mmap-overwrite.o
-  find: 
'/var/lib/dkms/lttng-modules/2.10.8/build/probes/../extra_version/patches/': No 
such file or directory
-  find: 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib/../extra_version/patches/': No 
such file or directory
-  find: 
'/var/lib/dkms/lttng-modules/2.10.8/build/tests/../extra_version/patches/': No 
such file or directory
-  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:41: File 
./arch/x86/kvm/lapic.h not found. Probe "kvm" x86-specific is disabled. Use 
full kernel source tree to enable it.
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/tests/probes/lttng-test.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_backend.o
-  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:166: Files 
./fs/btrfs/*.h not found. Probe "btrfs" is disabled. Use full kernel source 
tree to enable it.
-  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:182: Files 
./fs/ext4/*.h not found. Probe "ext4" is disabled. Use full kernel source tree 
to enable it.
-  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:215: File 
./drivers/base/regmap/trace.h not found. Probe "regmap" is disabled. Need Linux 
4.1+ kernel source tree to enable it.
-  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:265: Files 
./kernel/trace/trace.h not found. Probe "ftrace" is disabled. Use full kernel 
source tree to enable it.
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-sched.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/tests/clock-plugin/lttng-clock-plugin-test.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_frontend.o
-    LD [M]  /var/lib/dkms/lttng-modules/2.10.8/build/tests/lttng-test.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_iterator.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-irq.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-metadata-mmap-client.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_vfs.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-clock.o
-    LD [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/tests/lttng-clock-plugin-test.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.o
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-kmem.o
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c: In function 
'synchronize_trace':
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c:92:2: error: 
implicit declaration of function 'synchronize_sched'; did you mean 
'synchronize_srcu'? [-Werror=implicit-function-declaration]
-    synchronize_sched();
-    ^~~~~~~~~~~~~~~~~
-    synchronize_srcu
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.o
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c: In function 
'lttng_session_list_tracker_pids':
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c:1121:15: warning: 
comparison of constant '2147483647' with boolean expression is always false 
[-Wbool-compare]
-     1, INT_MAX) == INT_MAX) {
-                 ^~
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.o
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.c: In function 
'strutils_star_glob_match_char_cb':
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.c:315:6: 
warning: this statement may fall through [-Wimplicit-fallthrough=]
-      p = pattern_get_char_at_cb(p_at,
-      ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-       pattern_get_char_at_cb_data);
-       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.c:322:3: note: 
here
-     default:
-     ^~~~~~~
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-probes.o
-  In file included from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/define_trace.h:100:0,
-                   from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../instrumentation/events/lttng-module/timer.h:354,
-                   from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.c:43:
-  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/lttng-tracepoint-event-impl.h:143:6:
 error: conflicting types for 'trace_timer_expire_entry'
-   void trace_##_name(_proto);
-        ^
-  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/lttng-tracepoint-event-impl.h:55:2:
 note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP'
-    LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), 
PARAMS(args))
-    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/lttng-tracepoint-event-impl.h:97:2:
 note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_MAP'
-    LTTNG_TRACEPOINT_EVENT_MAP(name, name,    \
-    ^~~~~~~~~~~~~~~~~~~~~~~~~~
-  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../instrumentation/events/lttng-module/timer.h:96:1:
 note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT'
-   LTTNG_TRACEPOINT_EVENT(timer_expire_entry,
-   ^~~~~~~~~~~~~~~~~~~~~~
-  In file included from ./include/trace/events/timer.h:8:0,
-                   from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.c:32:
-  ./include/linux/tracepoint.h:233:21: note: previous definition of 
'trace_timer_expire_entry' was here
-    static inline void trace_##name(proto)    \
-                       ^
-  ./include/linux/tracepoint.h:396:2: note: in expansion of macro 
'__DECLARE_TRACE'
-    __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),  \
-    ^~~~~~~~~~~~~~~
-  ./include/linux/tracepoint.h:532:2: note: in expansion of macro 
'DECLARE_TRACE'
-    DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
-    ^~~~~~~~~~~~~
-  ./include/trace/events/timer.h:90:1: note: in expansion of macro 
'TRACE_EVENT'
-   TRACE_EVENT(timer_expire_entry,
-   ^~~~~~~~~~~
-    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/prio_heap/lttng_prio_heap.o
-  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.o' failed
-  make[2]: *** 
[/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.o] Error 1
-  make[2]: *** Waiting for unfinished jobs....
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lib/../wrapper/splice.o
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c: In function 
'lttng_abi_create_channel':
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c:434:15: warning: 
comparison of constant '2147483647' with boolean expression is always false 
[-Wbool-compare]
-     1, INT_MAX) == INT_MAX) {
-                 ^~
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c: In function 
'lttng_abi_create_event':
-  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c:1043:15: warning: 
comparison of constant '2147483647' with boolean expression is always false 
[-Wbool-compare]
-     1, INT_MAX) == INT_MAX) {
-                 ^~
-  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.c:59:3:
 error: 'const struct pipe_buf_operations' has no member named 'can_merge'
-    .can_merge = 0,
-     ^~~~~~~~~
-  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.o' 
failed
-  make[2]: *** 
[/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.o] 
Error 1
-  make[2]: *** Waiting for unfinished jobs....
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context.o
-  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.c:85:11:
 error: initialization from incompatible pointer type 
[-Werror=incompatible-pointer-types]
-    .fault = lib_ring_buffer_fault,
-             ^~~~~~~~~~~~~~~~~~~~~
-  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.c:85:11:
 note: (near initialization for 'lib_ring_buffer_mmap_ops.fault')
-  cc1: some warnings being treated as errors
-  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.o' 
failed
-  make[2]: *** 
[/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.o] 
Error 1
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-pid.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-procname.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-prio.o
-    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-nice.o
-  scripts/Makefile.build:519: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib' failed
-  make[1]: *** [/var/lib/dkms/lttng-modules/2.10.8/build/lib] Error 2
-  make[1]: *** Waiting for unfinished jobs....
-  cc1: some warnings being treated as errors
-  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.o' failed
-  make[1]: *** [/var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.o] Error 
1
-  scripts/Makefile.build:519: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/probes' failed
-  make[1]: *** [/var/lib/dkms/lttng-modules/2.10.8/build/probes] Error 2
-  Makefile:1653: recipe for target 
'_module_/var/lib/dkms/lttng-modules/2.10.8/build' failed
-  make: *** [_module_/var/lib/dkms/lttng-modules/2.10.8/build] Error 2
+  DKMS make.log for lttng-modules-2.10.8 for kernel 5.3.0-12-generic (i686)
+  Fri Sep 20 03:27:45 UTC 2019
+  make: Entering directory '/usr/src/linux-headers-5.3.0-12-generic'
+  find: '/var/lib/dkms/lttng-modules/2.10.8/build/extra_version/patches/': No 
such file or directory
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-discard.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-overwrite.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-metadata-client.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-mmap-discard.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-client-mmap-overwrite.o
+  find: 
'/var/lib/dkms/lttng-modules/2.10.8/build/probes/../extra_version/patches/': No 
such file or directory
+  find: 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib/../extra_version/patches/': No 
such file or directory
+  find: 
'/var/lib/dkms/lttng-modules/2.10.8/build/tests/../extra_version/patches/': No 
such file or directory
+  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:41: File 
./arch/x86/kvm/lapic.h not found. Probe "kvm" x86-specific is disabled. Use 
full kernel source tree to enable it.
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/tests/probes/lttng-test.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_backend.o
+  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:166: Files 
./fs/btrfs/*.h not found. Probe "btrfs" is disabled. Use full kernel source 
tree to enable it.
+  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:182: Files 
./fs/ext4/*.h not found. Probe "ext4" is disabled. Use full kernel source tree 
to enable it.
+  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:215: File 
./drivers/base/regmap/trace.h not found. Probe "regmap" is disabled. Need Linux 
4.1+ kernel source tree to enable it.
+  /var/lib/dkms/lttng-modules/2.10.8/build/probes/Kbuild:265: Files 
./kernel/trace/trace.h not found. Probe "ftrace" is disabled. Use full kernel 
source tree to enable it.
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-sched.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/tests/clock-plugin/lttng-clock-plugin-test.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_frontend.o
+    LD [M]  /var/lib/dkms/lttng-modules/2.10.8/build/tests/lttng-test.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_iterator.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-irq.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lttng-ring-buffer-metadata-mmap-client.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_vfs.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-clock.o
+    LD [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/tests/lttng-clock-plugin-test.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.o
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-kmem.o
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c: In function 
'synchronize_trace':
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c:92:2: error: 
implicit declaration of function 'synchronize_sched'; did you mean 
'synchronize_srcu'? [-Werror=implicit-function-declaration]
+    synchronize_sched();
+    ^~~~~~~~~~~~~~~~~
+    synchronize_srcu
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.o
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c: In function 
'lttng_session_list_tracker_pids':
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.c:1121:15: warning: 
comparison of constant '2147483647' with boolean expression is always false 
[-Wbool-compare]
+     1, INT_MAX) == INT_MAX) {
+                 ^~
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.o
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.c: In function 
'strutils_star_glob_match_char_cb':
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.c:315:6: 
warning: this statement may fall through [-Wimplicit-fallthrough=]
+      p = pattern_get_char_at_cb(p_at,
+      ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+       pattern_get_char_at_cb_data);
+       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-string-utils.c:322:3: note: 
here
+     default:
+     ^~~~~~~
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-probes.o
+  In file included from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/define_trace.h:100:0,
+                   from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../instrumentation/events/lttng-module/timer.h:354,
+                   from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.c:43:
+  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/lttng-tracepoint-event-impl.h:143:6:
 error: conflicting types for 'trace_timer_expire_entry'
+   void trace_##_name(_proto);
+        ^
+  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/lttng-tracepoint-event-impl.h:55:2:
 note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP'
+    LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), 
PARAMS(args))
+    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../probes/lttng-tracepoint-event-impl.h:97:2:
 note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_MAP'
+    LTTNG_TRACEPOINT_EVENT_MAP(name, name,    \
+    ^~~~~~~~~~~~~~~~~~~~~~~~~~
+  
/var/lib/dkms/lttng-modules/2.10.8/build/probes/../instrumentation/events/lttng-module/timer.h:96:1:
 note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT'
+   LTTNG_TRACEPOINT_EVENT(timer_expire_entry,
+   ^~~~~~~~~~~~~~~~~~~~~~
+  In file included from ./include/trace/events/timer.h:8:0,
+                   from 
/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.c:32:
+  ./include/linux/tracepoint.h:233:21: note: previous definition of 
'trace_timer_expire_entry' was here
+    static inline void trace_##name(proto)    \
+                       ^
+  ./include/linux/tracepoint.h:396:2: note: in expansion of macro 
'__DECLARE_TRACE'
+    __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),  \
+    ^~~~~~~~~~~~~~~
+  ./include/linux/tracepoint.h:532:2: note: in expansion of macro 
'DECLARE_TRACE'
+    DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+    ^~~~~~~~~~~~~
+  ./include/trace/events/timer.h:90:1: note: in expansion of macro 
'TRACE_EVENT'
+   TRACE_EVENT(timer_expire_entry,
+   ^~~~~~~~~~~
+    CC [M]  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/prio_heap/lttng_prio_heap.o
+  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.o' failed
+  make[2]: *** 
[/var/lib/dkms/lttng-modules/2.10.8/build/probes/lttng-probe-timer.o] Error 1
+  make[2]: *** Waiting for unfinished jobs....
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lib/../wrapper/splice.o
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c: In function 
'lttng_abi_create_channel':
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c:434:15: warning: 
comparison of constant '2147483647' with boolean expression is always false 
[-Wbool-compare]
+     1, INT_MAX) == INT_MAX) {
+                 ^~
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c: In function 
'lttng_abi_create_event':
+  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-abi.c:1043:15: warning: 
comparison of constant '2147483647' with boolean expression is always false 
[-Wbool-compare]
+     1, INT_MAX) == INT_MAX) {
+                 ^~
+  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.c:59:3:
 error: 'const struct pipe_buf_operations' has no member named 'can_merge'
+    .can_merge = 0,
+     ^~~~~~~~~
+  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.o' 
failed
+  make[2]: *** 
[/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_splice.o] 
Error 1
+  make[2]: *** Waiting for unfinished jobs....
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context.o
+  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.c:85:11:
 error: initialization from incompatible pointer type 
[-Werror=incompatible-pointer-types]
+    .fault = lib_ring_buffer_fault,
+             ^~~~~~~~~~~~~~~~~~~~~
+  
/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.c:85:11:
 note: (near initialization for 'lib_ring_buffer_mmap_ops.fault')
+  cc1: some warnings being treated as errors
+  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.o' 
failed
+  make[2]: *** 
[/var/lib/dkms/lttng-modules/2.10.8/build/lib/ringbuffer/ring_buffer_mmap.o] 
Error 1
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-pid.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-procname.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-prio.o
+    CC [M]  /var/lib/dkms/lttng-modules/2.10.8/build/lttng-context-nice.o
+  scripts/Makefile.build:519: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lib' failed
+  make[1]: *** [/var/lib/dkms/lttng-modules/2.10.8/build/lib] Error 2
+  make[1]: *** Waiting for unfinished jobs....
+  cc1: some warnings being treated as errors
+  scripts/Makefile.build:288: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.o' failed
+  make[1]: *** [/var/lib/dkms/lttng-modules/2.10.8/build/lttng-events.o] Error 
1
+  scripts/Makefile.build:519: recipe for target 
'/var/lib/dkms/lttng-modules/2.10.8/build/probes' failed
+  make[1]: *** [/var/lib/dkms/lttng-modules/2.10.8/build/probes] Error 2
+  Makefile:1653: recipe for target 
'_module_/var/lib/dkms/lttng-modules/2.10.8/build' failed
+  make: *** [_module_/var/lib/dkms/lttng-modules/2.10.8/build] Error 2

** Patch added: "debdiff for bionic"
   
https://bugs.launchpad.net/ubuntu/+source/lttng-modules/+bug/1844764/+attachment/5307177/+files/lttng-modules_2.10.8-1ubuntu2~18.04.1.debdiff

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https://bugs.launchpad.net/bugs/1844764

Title:
  ubuntu_lttng_smoke_test failed with module build on B-hwe-edge 5.3.0

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