[lttng-dev] Error in lttng-modules after pulling in commit 'writeback: Fix sync livelock due to b_dirty_time processing'

[Naaz, Syeda Shagufta]

Hi All,

I’m facing compilation error in build after pulling in the stable kernel LTS(4.14.y) commit - https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=77322edb99f0176ec67a300b9f263719ba391b89

I tried this solution - https://github.com/lttng/lttng-modules/commit/7318a1e88c8097733f5a05529069e4e03c142cae

But this also didn’t resolve my problem.
| In file included from /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/../probes/define_trace.h💯0,
|                  from /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/../instrumentation/events/lttng-module/writeback.h:735,
|                  from /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/lttng-probe-writeback.c:51:
| /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/../probes/lttng-tracepoint-event-impl.h:143:6: error: conflicting types for 'trace_writeback_queue_io'
|  void trace_##_name(_proto);
|       ^
| /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/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))
|   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/../probes/lttng-tracepoint-event-impl.h:97:2: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_MAP'
|   LTTNG_TRACEPOINT_EVENT_MAP(name, name,    \
|   ^~~~~~~~~~~~~~~~~~~~~~~~~~
| /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/../instrumentation/events/lttng-module/writeback.h:375:1: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT'
|  LTTNG_TRACEPOINT_EVENT(writeback_queue_io,
|  ^~~~~~~~~~~~~~~~~~~~~~
| In file included from /home/snaaz/elm/8up/main/build_zcu/tmp/work-shared/zcu102-zynqmp-mel/kernel-source/include/trace/events/writeback.h:8:0,
|                  from /home/snaaz/elm/8up/main/build_zcu/tmp/work/zcu102_zynqmp_mel-mel-linux/lttng-modules/2.10.9-r0/lttng-modules-2.10.9/probes/lttng-probe-writeback.c:33:
| /home/snaaz/elm/8up/main/build_zcu/tmp/work-shared/zcu102-zynqmp-mel/kernel-source/include/linux/tracepoint.h:187:21: note: previous definition of 'trace_writeback_queue_io' was here
|   static inline void trace_##name(proto)    \
|                      ^
| /home/snaaz/elm/8up/main/build_zcu/tmp/work-shared/zcu102-zynqmp-mel/kernel-source/include/linux/tracepoint.h:352:2: note: in expansion of macro '__DECLARE_TRACE'
|   __DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),  \
|   ^~~~~~~~~~~~~~~
| /home/snaaz/elm/8up/main/build_zcu/tmp/work-shared/zcu102-zynqmp-mel/kernel-source/include/linux/tracepoint.h:488:2: note: in expansion of macro 'DECLARE_TRACE'
|   DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
|   ^~~~~~~~~~~~~
| /home/snaaz/elm/8up/main/build_zcu/tmp/work-shared/zcu102-zynqmp-mel/kernel-source/include/trace/events/writeback.h:361:1: note: in expansion of macro 'TRACE_EVENT'
|  TRACE_EVENT(writeback_queue_io,

Kindly look into it and do the needful. Thanks!

Regards,
Syeda Shagufta Naaz
Software Development Engineer | Mentor Embedded Linux
Mentor, A Siemens Business

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