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-rw-r--r--tools/perf/util/levenshtein.h8
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diff --git a/tools/perf/util/levenshtein.h b/tools/perf/util/levenshtein.h
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+++ b/tools/perf/util/levenshtein.h
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+#ifndef LEVENSHTEIN_H
+#define LEVENSHTEIN_H
+
+int levenshtein(const char *string1, const char *string2,
+ int swap_penalty, int substition_penalty,
+ int insertion_penalty, int deletion_penalty);
+
+#endif