1 files changed, 8 insertions, 2 deletions

diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 61d0b73dabf5..b3a320f8aba7 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -16,8 +16,14 @@
 
 #include "trace.h"
 
+/* function tracing enabled */
+static int                      ftrace_function_enabled;
+
 static struct trace_array       *func_trace;
 
+static void tracing_start_function_trace(void);
+static void tracing_stop_function_trace(void);
+
 static void start_function_trace(struct trace_array *tr)
 {
         func_trace = tr;
@@ -177,7 +183,7 @@ static struct tracer_flags func_flags = {
         .opts = func_opts
 };
 
-void tracing_start_function_trace(void)
+static void tracing_start_function_trace(void)
 {
         ftrace_function_enabled = 0;
 
@@ -194,7 +200,7 @@ void tracing_start_function_trace(void)
         ftrace_function_enabled = 1;
 }
 
-void tracing_stop_function_trace(void)
+static void tracing_stop_function_trace(void)
 {
         ftrace_function_enabled = 0;
         /* OK if they are not registered */