825 	if (!current->ret_stack)  in profile_graph_entry()
829 		current->ret_stack[index].subtime = 0;  in profile_graph_entry()
859 			current->ret_stack[index - 1].subtime += calltime;  in profile_graph_return()
861 		if (current->ret_stack[index].subtime < calltime)  in profile_graph_return()
862 			calltime -= current->ret_stack[index].subtime;  in profile_graph_return()
6813 		if (t->ret_stack == NULL) {  in alloc_retstack_tasklist()
6819 			t->ret_stack = ret_stack_list[start++];  in alloc_retstack_tasklist()
6860 		next->ret_stack[index].calltime += timestamp;  in ftrace_graph_probe_sched_switch()
6878 		if (!idle_task(cpu)->ret_stack)  in start_graph_tracing()
7024 graph_init_task(struct task_struct *t, struct ftrace_ret_stack *ret_stack)  in graph_init_task()  argument
7031 	t->ret_stack = ret_stack;  in graph_init_task()
7045 	if (t->ret_stack)  in ftrace_graph_init_idle_task()
7046 		WARN_ON(t->ret_stack != per_cpu(idle_ret_stack, cpu));  in ftrace_graph_init_idle_task()
7049 		struct ftrace_ret_stack *ret_stack;  in ftrace_graph_init_idle_task()  local
7051 		ret_stack = per_cpu(idle_ret_stack, cpu);  in ftrace_graph_init_idle_task()
7052 		if (!ret_stack) {  in ftrace_graph_init_idle_task()
7053 			ret_stack =  in ftrace_graph_init_idle_task()
7057 			if (!ret_stack)  in ftrace_graph_init_idle_task()
7059 			per_cpu(idle_ret_stack, cpu) = ret_stack;  in ftrace_graph_init_idle_task()
7061 		graph_init_task(t, ret_stack);  in ftrace_graph_init_idle_task()
7069 	t->ret_stack = NULL;  in ftrace_graph_init_task()
7073 		struct ftrace_ret_stack *ret_stack;  in ftrace_graph_init_task()  local
7075 		ret_stack = kmalloc_array(FTRACE_RETFUNC_DEPTH,  in ftrace_graph_init_task()
7078 		if (!ret_stack)  in ftrace_graph_init_task()
7080 		graph_init_task(t, ret_stack);  in ftrace_graph_init_task()
7086 	struct ftrace_ret_stack	*ret_stack = t->ret_stack;  in ftrace_graph_exit_task()  local
7088 	t->ret_stack = NULL;  in ftrace_graph_exit_task()
7092 	kfree(ret_stack);  in ftrace_graph_exit_task()