ftrace: remove static from function tracer functions

Impact: clean up

After reorganizing the functions in trace.c and trace_function.c,
they no longer need to be in global context. This patch makes the
functions and one variable into static.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/trace/trace.c

@@ -187,9 +187,6 @@ int tracing_is_enabled(void)
 	return tracer_enabled;
 }
 
-/* function tracing enabled */
-int				ftrace_function_enabled;
-
 /*
  * trace_buf_size is the size in bytes that is allocated
  * for a buffer. Note, the number of bytes is always rounded

kernel/trace/trace.h

@@ -464,16 +464,6 @@ void __trace_stack(struct trace_array *tr,
 
 extern cycle_t ftrace_now(int cpu);
 
-#ifdef CONFIG_FUNCTION_TRACER
-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
-
-extern int ftrace_function_enabled;
-
 #ifdef CONFIG_CONTEXT_SWITCH_TRACER
 typedef void
 (*tracer_switch_func_t)(void *private,

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 */