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Diffstat (limited to 'include')
-rw-r--r--include/linux/ftrace.h16
1 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 166a2070ef6..f1af1aab00e 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -25,6 +25,17 @@ struct ftrace_ops {
extern int function_trace_stop;
+/*
+ * Type of the current tracing.
+ */
+enum ftrace_tracing_type_t {
+ FTRACE_TYPE_ENTER = 0, /* Hook the call of the function */
+ FTRACE_TYPE_RETURN, /* Hook the return of the function */
+};
+
+/* Current tracing type, default is FTRACE_TYPE_ENTER */
+extern enum ftrace_tracing_type_t ftrace_tracing_type;
+
/**
* ftrace_stop - stop function tracer.
*
@@ -104,6 +115,9 @@ extern int ftrace_update_ftrace_func(ftrace_func_t func);
extern void ftrace_caller(void);
extern void ftrace_call(void);
extern void mcount_call(void);
+#ifdef CONFIG_FUNCTION_RET_TRACER
+extern void ftrace_return_caller(void);
+#endif
/**
* ftrace_make_nop - convert code into top
@@ -310,7 +324,7 @@ struct ftrace_retfunc {
/* Type of a callback handler of tracing return function */
typedef void (*trace_function_return_t)(struct ftrace_retfunc *);
-extern void register_ftrace_return(trace_function_return_t func);
+extern int register_ftrace_return(trace_function_return_t func);
/* The current handler in use */
extern trace_function_return_t ftrace_function_return;
extern void unregister_ftrace_return(void);