922 			current->ret_stack[index - 1].subtime += calltime;  in profile_graph_return()
924 		if (current->ret_stack[index].subtime < calltime)  in profile_graph_return()
925 			calltime -= current->ret_stack[index].subtime;  in profile_graph_return()
5676 		if (t->ret_stack == NULL) {  in alloc_retstack_tasklist()
5682 			t->ret_stack = ret_stack_list[start++];  in alloc_retstack_tasklist()
5723 		next->ret_stack[index].calltime += timestamp;  in ftrace_graph_probe_sched_switch()
5741 		if (!idle_task(cpu)->ret_stack)  in start_graph_tracing()
5898 graph_init_task(struct task_struct *t, struct ftrace_ret_stack *ret_stack)  in graph_init_task()  argument
5905 	t->ret_stack = ret_stack;  in graph_init_task()
5919 	if (t->ret_stack)  in ftrace_graph_init_idle_task()
5920 		WARN_ON(t->ret_stack != per_cpu(idle_ret_stack, cpu));  in ftrace_graph_init_idle_task()
5923 		struct ftrace_ret_stack *ret_stack;  in ftrace_graph_init_idle_task()  local
5925 		ret_stack = per_cpu(idle_ret_stack, cpu);  in ftrace_graph_init_idle_task()
5926 		if (!ret_stack) {  in ftrace_graph_init_idle_task()
5927 			ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH  in ftrace_graph_init_idle_task()
5930 			if (!ret_stack)  in ftrace_graph_init_idle_task()
5932 			per_cpu(idle_ret_stack, cpu) = ret_stack;  in ftrace_graph_init_idle_task()
5934 		graph_init_task(t, ret_stack);  in ftrace_graph_init_idle_task()
5942 	t->ret_stack = NULL;  in ftrace_graph_init_task()
5946 		struct ftrace_ret_stack *ret_stack;  in ftrace_graph_init_task()  local
5948 		ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH  in ftrace_graph_init_task()
5951 		if (!ret_stack)  in ftrace_graph_init_task()
5953 		graph_init_task(t, ret_stack);  in ftrace_graph_init_task()
5959 	struct ftrace_ret_stack	*ret_stack = t->ret_stack;  in ftrace_graph_exit_task()  local
5961 	t->ret_stack = NULL;  in ftrace_graph_exit_task()
5965 	kfree(ret_stack);  in ftrace_graph_exit_task()