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From 417bb00022c813c6dc11bfa652d74f3687df7626 Mon Sep 17 00:00:00 2001
From: Bruce Ashfield <bruce.ashfield@gmail.com>
Date: Wed, 3 Aug 2022 14:55:56 -0400
Subject: [PATCH] compaction: make tracepoints condtional on CONFIG_COMPACTION
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]
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
---
include/instrumentation/events/compaction.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/instrumentation/events/compaction.h b/include/instrumentation/events/compaction.h
index ecae39a..155804a 100644
--- a/include/instrumentation/events/compaction.h
+++ b/include/instrumentation/events/compaction.h
@@ -9,6 +9,8 @@
#include <linux/types.h>
#include <lttng/kernel-version.h>
+#ifdef CONFIG_COMPACTION
+
#if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0)
LTTNG_TRACEPOINT_EVENT_CLASS(compaction_isolate_template,
@@ -97,6 +99,7 @@ LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(compaction_isolate_template,
#endif /* #else #if LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,0,0) */
+
#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,18,0))
LTTNG_TRACEPOINT_EVENT_MAP(mm_compaction_migratepages,
@@ -182,6 +185,8 @@ LTTNG_TRACEPOINT_EVENT_MAP(mm_compaction_migratepages,
)
#endif /* #else #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,16,0)) */
+#endif /* CONFIG_COMPACTION */
+
#endif /* LTTNG_TRACE_COMPACTION_H */
/* This part must be outside protection */
--
2.25.1
|
