[RFC 02/16] ftrace: Make ftrace_is_dead available globally

[Jiri Slaby <jslaby@suse.cz>]

Kgr wants to test whether ftrace is OK with patching. If not, we just
bail out and will not initialize at all.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
---
 include/linux/ftrace.h | 3 +++
 kernel/trace/trace.h   | 2 --
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 8b447493b6a5..720b7be77615 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -144,6 +144,8 @@ enum ftrace_tracing_type_t {
 /* Current tracing type, default is FTRACE_TYPE_ENTER */
 extern enum ftrace_tracing_type_t ftrace_tracing_type;
 
+extern int ftrace_is_dead(void);
+
 /**
  * ftrace_stop - stop function tracer.
  *
@@ -245,6 +247,7 @@ static inline int ftrace_nr_registered_ops(void)
 	return 0;
 }
 static inline void clear_ftrace_function(void) { }
+static inline int ftrace_is_dead(void) { return 0; }
 static inline void ftrace_kill(void) { }
 static inline void ftrace_stop(void) { }
 static inline void ftrace_start(void) { }
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 2e29d7ba5a52..e3d867571ffc 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -819,7 +819,6 @@ static inline int ftrace_trace_task(struct task_struct *task)
 
 	return test_tsk_trace_trace(task);
 }
-extern int ftrace_is_dead(void);
 int ftrace_create_function_files(struct trace_array *tr,
 				 struct dentry *parent);
 void ftrace_destroy_function_files(struct trace_array *tr);
@@ -828,7 +827,6 @@ static inline int ftrace_trace_task(struct task_struct *task)
 {
 	return 1;
 }
-static inline int ftrace_is_dead(void) { return 0; }
 static inline int
 ftrace_create_function_files(struct trace_array *tr,
 			     struct dentry *parent)
-- 
1.9.2