ubuntu_lttng_smoke_test failed with DKMS installation on F-riscv-5.8 / F-oracle-5.11 / F-aws-5.11

This is not a regression since this test was added back for OEM kernel this cycle (2021 Mar.).

Test failed because of the DKMS module failed to build:
 /var/lib/dkms/lttng-modules/2.12.2/build/probes/../lib/ringbuffer/backend.h:360:9: error: ‘KERNEL_DS’ undeclared (first use in this function); did you mean ‘KERNFS_NS’?
   360 | set_fs(KERNEL_DS);
       | ^~~~~~~~~
       | KERNFS_NS
 cc1: some warnings being treated as errors
 /var/lib/dkms/lttng-modules/2.12.2/build/probes/../lib/ringbuffer/backend.h: In function ‘lib_ring_buffer_copy_from_user_check_nofault’:
 /var/lib/dkms/lttng-modules/2.12.2/build/probes/../lib/ringbuffer/backend.h:454:11: error: incompatible types when assigning to type ‘mm_segment_t’ {aka ‘struct <anonymous>’} from type ‘int’
   454 | old_fs = get_fs();
       | ^~~~~~
 /var/lib/dkms/lttng-modules/2.12.2/build/probes/../lib/ringbuffer/backend.h:455:9: error: ‘KERNEL_DS’ undeclared (first use in this function); did you mean ‘KERNFS_NS’?
   455 | set_fs(KERNEL_DS);
       | ^~~~~~~~~
       | KERNFS_NS
 make[2]: *** [scripts/Makefile.build:287: /var/lib/dkms/lttng-modules/2.12.2/build/probes/lttng-probe-writeback.o] Error 1
 cc1: some warnings being treated as errors
 make[2]: *** [scripts/Makefile.build:287: /var/lib/dkms/lttng-modules/2.12.2/build/probes/lttng-probe-sunrpc.o] Error 1
 make[1]: *** [scripts/Makefile.build:518: /var/lib/dkms/lttng-modules/2.12.2/build/probes] Error 2
 cc1: some warnings being treated as errors
 make[1]: *** [scripts/Makefile.build:287: /var/lib/dkms/lttng-modules/2.12.2/build/lttng-syscalls.o] Error 1
 make: *** [Makefile:1835: /var/lib/dkms/lttng-modules/2.12.2/build] Error 2
 make: Leaving directory '/usr/src/linux-headers-5.10.0-1020-oem'
Exception escaping from test:
Traceback (most recent call last):
  File "/home/ubuntu/autotest/client/shared/test.py", line 387, in _exec
    *p_args, **p_dargs)
  File "/home/ubuntu/autotest/client/shared/utils.py", line 865, in update_version
    install(*args, **dargs)
  File "/home/ubuntu/autotest/client/tests/ubuntu_lttng_smoke_test/ubuntu_lttng_smoke_test.py", line 62, in setup
    raise error.TestError('DKMS failed to install')
TestError: DKMS failed to install

Please find attachment for the DKMS build log.