diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index d39b3c5..9021f8c 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -343,6 +343,10 @@
 		    unsigned long ip,
 		    unsigned long parent_ip,
 		    unsigned long flags, int pc);
+void trace_graph_function(struct trace_array *tr,
+		    unsigned long ip,
+		    unsigned long parent_ip,
+		    unsigned long flags, int pc);
 void trace_default_header(struct seq_file *m);
 void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
 int trace_empty(struct trace_iterator *iter);