1 files changed, 2 insertions, 1 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index d7410bbb9a80..c66ca3b66050 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -605,6 +605,8 @@ extern unsigned long trace_flags;
 /* Standard output formatting function used for function return traces */
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 extern enum print_line_t print_graph_function(struct trace_iterator *iter);
+extern enum print_line_t
+trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 /* TODO: make this variable */
@@ -636,7 +638,6 @@ static inline int ftrace_graph_addr(unsigned long addr)
         return 1;
 }
 #endif /* CONFIG_DYNAMIC_FTRACE */
-
 #else /* CONFIG_FUNCTION_GRAPH_TRACER */
 static inline enum print_line_t
 print_graph_function(struct trace_iterator *iter)