1 files changed, 25 insertions, 3 deletions

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index c7e92732982d..116524d62366 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -489,9 +489,31 @@ void update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu);
 void update_max_tr_single(struct trace_array *tr,
                           struct task_struct *tsk, int cpu);
 
-void __trace_stack(struct trace_array *tr,
-                   unsigned long flags,
-                   int skip, int pc);
+#ifdef CONFIG_STACKTRACE
+void ftrace_trace_stack(struct trace_array *tr, unsigned long flags,
+                        int skip, int pc);
+
+void ftrace_trace_userstack(struct trace_array *tr, unsigned long flags,
+                            int pc);
+
+void __trace_stack(struct trace_array *tr, unsigned long flags, int skip,
+                   int pc);
+#else
+static inline void ftrace_trace_stack(struct trace_array *tr,
+                                      unsigned long flags, int skip, int pc)
+{
+}
+
+static inline void ftrace_trace_userstack(struct trace_array *tr,
+                                          unsigned long flags, int pc)
+{
+}
+
+static inline void __trace_stack(struct trace_array *tr, unsigned long flags,
+                                 int skip, int pc)
+{
+}
+#endif /* CONFIG_STACKTRACE */
 
 extern cycle_t ftrace_now(int cpu);