--- kernel/trace/ftrace.c

+++ kernel/trace/ftrace.c

@@ -3258,6 +3258,7 @@ void ftrace_graph_init_task(struct task_

{

/* Make sure we do not use the parent ret_stack */

t->ret_stack = NULL;

+ t->curr_ret_stack = -1;

if (ftrace_graph_active) {

struct ftrace_ret_stack *ret_stack;

@@ -3267,7 +3268,6 @@ void ftrace_graph_init_task(struct task_

GFP_KERNEL);

if (!ret_stack)

return;

- t->curr_ret_stack = -1;

atomic_set(&t->tracing_graph_pause, 0);

atomic_set(&t->trace_overrun, 0);

t->ftrace_timestamp = 0;