function_graph: Remove unused task_curr_ret_stack()

The static inline function task_curr_ret_stack() is unused, remove it.

Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index dd16e82..10bd464 100644 (file)
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -809,11 +809,6 @@ extern void ftrace_graph_init_task(struct task_struct *t);
 extern void ftrace_graph_exit_task(struct task_struct *t);
 extern void ftrace_graph_init_idle_task(struct task_struct *t, int cpu);
 
-static inline int task_curr_ret_stack(struct task_struct *t)
-{
-       return t->curr_ret_stack;
-}
-
 static inline void pause_graph_tracing(void)
 {
        atomic_inc(&current->tracing_graph_pause);
@@ -838,11 +833,6 @@ static inline int register_ftrace_graph(trace_func_graph_ret_t retfunc,
 }
 static inline void unregister_ftrace_graph(void) { }
 
-static inline int task_curr_ret_stack(struct task_struct *tsk)
-{
-       return -1;
-}
-
 static inline unsigned long
 ftrace_graph_ret_addr(struct task_struct *task, int *idx, unsigned long ret,
                      unsigned long *retp)