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-rw-r--r--tools/perf/util/callchain.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 1ca73e4a272..809850fb75f 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -60,5 +60,5 @@ int register_callchain_param(struct callchain_param *param);
int append_chain(struct callchain_node *root, struct ip_callchain *chain,
struct map_symbol *syms);
-bool ip_callchain__valid(struct ip_callchain *chain, event_t *event);
+bool ip_callchain__valid(struct ip_callchain *chain, const event_t *event);
#endif /* __PERF_CALLCHAIN_H */