ftrace: add self-tests

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/trace/trace_functions.c b/kernel/trace/trace_functions.c
index 82988c5..5d8ad7a 100644
--- a/kernel/trace/trace_functions.c
+++ b/kernel/trace/trace_functions.c
@@ -63,6 +63,9 @@
 	.init	     = function_trace_init,
 	.reset	     = function_trace_reset,
 	.ctrl_update = function_trace_ctrl_update,
+#ifdef CONFIG_FTRACE_SELFTEST
+	.selftest    = trace_selftest_startup_function,
+#endif
 };
 
 static __init int init_function_trace(void)