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-rw-r--r--tools/perf/util/tool.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index 62bbc9cec151b..2b12c674768f1 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -15,14 +15,14 @@ struct perf_tool;
struct machine;
struct ordered_events;
-typedef int (*event_sample)(struct perf_tool *tool, union perf_event *event,
+typedef int (*event_sample)(const struct perf_tool *tool, union perf_event *event,
struct perf_sample *sample,
struct evsel *evsel, struct machine *machine);
-typedef int (*event_op)(struct perf_tool *tool, union perf_event *event,
+typedef int (*event_op)(const struct perf_tool *tool, union perf_event *event,
struct perf_sample *sample, struct machine *machine);
-typedef int (*event_attr_op)(struct perf_tool *tool,
+typedef int (*event_attr_op)(const struct perf_tool *tool,
union perf_event *event,
struct evlist **pevlist);
@@ -31,7 +31,7 @@ typedef s64 (*event_op3)(struct perf_session *session, union perf_event *event);
typedef int (*event_op4)(struct perf_session *session, union perf_event *event, u64 data,
const char *str);
-typedef int (*event_oe)(struct perf_tool *tool, union perf_event *event,
+typedef int (*event_oe)(const struct perf_tool *tool, union perf_event *event,
struct ordered_events *oe);
enum show_feature_header {