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When building against a v5.19 mips kernel, the following errors were triggered: | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:105:42: note: expected 'struct compact_control *' but argument is of type 'struct compact_control *' | 105 | TP_PROTO(struct compact_control *cc, | | ~~~~~~~~~~~~~~~~~~~~~~~~^~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:779:68: note: in definition of macro 'LTTNG_TRACEPOINT_EVENT_CLASS_CODE' | 779 | static inline size_t __event_get_align__##_name(void *__tp_locvar, _proto) \ | | ^~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:106:50: note: in expansion of macro 'PARAMS' | 106 | LTTNG_TRACEPOINT_EVENT_CLASS_CODE(_name, PARAMS(_proto), PARAMS(_args), , , \ | | ^~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:41:9: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_CLASS' | 41 | LTTNG_TRACEPOINT_EVENT_CLASS(map, \ | | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:42:30: note: in expansion of macro 'PARAMS' | 42 | PARAMS(proto), \ | | ^~~~~~ | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:101:1: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_MAP' | 101 | LTTNG_TRACEPOINT_EVENT_MAP(mm_compaction_migratepages, | | ^~~~~~~~~~~~~~~~~~~~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:105:9: note: in expansion of macro 'TP_PROTO' | 105 | TP_PROTO(struct compact_control *cc, | | ^~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:112:57: error: invalid use of undefined type 'struct compact_control' ... | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:108:25: warning: 'struct compact_control' declared inside parameter list will not be visible outside of this definition or declaration | 108 | TP_PROTO(struct compact_control *cc, | | ^~~~~~~~~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:159:43: note: in definition of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP' | 159 | void __event_template_proto___##_template(_proto); | | ^~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:45:61: note: in expansion of macro 'PARAMS' | 45 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) | | ^~~~~~ | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:104:1: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_MAP' | 104 | LTTNG_TRACEPOINT_EVENT_MAP(mm_compaction_migratepages, | | ^~~~~~~~~~~~~~~~~~~~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/instrumentation/events/compaction.h:108:9: note: in expansion of macro 'TP_PROTO' | 108 | TP_PROTO(struct compact_control *cc, | | ^~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:159:6: error: conflicting types for '__event_template_proto___compaction_migratepages'; have 'void(struct compact_control *, unsigned int)' | 159 | void __event_template_proto___##_template(_proto); | | ^~~~~~~~~~~~~~~~~~~~~~~~~ | lttng-modules-2.13.4/src/probes/../../include/lttng/tracepoint-event-impl.h:45:9: note: in expansion of macro 'LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP' | 45 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(map, name, map, PARAMS(proto), PARAMS(args)) | | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The root cause appears to be that this particular mips kernel does not have CONFIG_COMPACTION avaiable, and hence we end up with the struct declaration within this tracepoint, and then conflicting types. While putting the conditional around only compaction_migratepages seemed sufficient to get the build working, it doesn't look like any of the tracepoints should be valid, so we extend it to all definitions. Upstream-Status: Submitted [https://lists.lttng.org/pipermail/lttng-dev/2022-August/030246.html] (From OE-Core rev: e25f7b5ca83d3f025ef2235f2ebd8233013eb406) Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>