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Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 6b8bd8800d0..df840f42be3 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -216,8 +216,6 @@ void trace_function(struct trace_array *tr,
unsigned long parent_ip,
unsigned long flags);
-void tracing_start_function_trace(void);
-void tracing_stop_function_trace(void);
void tracing_start_cmdline_record(void);
void tracing_stop_cmdline_record(void);
int register_tracer(struct tracer *type);
@@ -234,6 +232,14 @@ void update_max_tr_single(struct trace_array *tr,
extern cycle_t ftrace_now(int cpu);
+#ifdef CONFIG_FTRACE
+void tracing_start_function_trace(void);
+void tracing_stop_function_trace(void);
+#else
+# define tracing_start_function_trace() do { } while (0)
+# define tracing_stop_function_trace() do { } while (0)
+#endif
+
#ifdef CONFIG_CONTEXT_SWITCH_TRACER
typedef void
(*tracer_switch_func_t)(void *private,