--- include/linux/ftrace.h

+++ include/linux/ftrace.h

@@ -412,6 +412,7 @@ extern void unregister_ftrace_graph(void

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)

{

@@ -435,6 +436,7 @@ static inline void unpause_graph_tracing

static inline void ftrace_graph_init_task(struct task_struct *t) { }

static inline void ftrace_graph_exit_task(struct task_struct *t) { }

+static inline void ftrace_graph_init_idle_task(struct task_struct *t, int cpu) { }

static inline int task_curr_ret_stack(struct task_struct *tsk)

{