932 			current->ret_stack[index - 1].subtime += calltime;  in profile_graph_return()
934 		if (current->ret_stack[index].subtime < calltime)  in profile_graph_return()
935 			calltime -= current->ret_stack[index].subtime;  in profile_graph_return()
5692 		if (t->ret_stack == NULL) {  in alloc_retstack_tasklist()
5698 			t->ret_stack = ret_stack_list[start++];  in alloc_retstack_tasklist()
5739 		next->ret_stack[index].calltime += timestamp;  in ftrace_graph_probe_sched_switch()
5757 		if (!idle_task(cpu)->ret_stack)  in start_graph_tracing()
5914 graph_init_task(struct task_struct *t, struct ftrace_ret_stack *ret_stack)  in graph_init_task()  argument
5921 	t->ret_stack = ret_stack;  in graph_init_task()
5935 	if (t->ret_stack)  in ftrace_graph_init_idle_task()
5936 		WARN_ON(t->ret_stack != per_cpu(idle_ret_stack, cpu));  in ftrace_graph_init_idle_task()
5939 		struct ftrace_ret_stack *ret_stack;  in ftrace_graph_init_idle_task()  local
5941 		ret_stack = per_cpu(idle_ret_stack, cpu);  in ftrace_graph_init_idle_task()
5942 		if (!ret_stack) {  in ftrace_graph_init_idle_task()
5943 			ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH  in ftrace_graph_init_idle_task()
5946 			if (!ret_stack)  in ftrace_graph_init_idle_task()
5948 			per_cpu(idle_ret_stack, cpu) = ret_stack;  in ftrace_graph_init_idle_task()
5950 		graph_init_task(t, ret_stack);  in ftrace_graph_init_idle_task()
5958 	t->ret_stack = NULL;  in ftrace_graph_init_task()
5962 		struct ftrace_ret_stack *ret_stack;  in ftrace_graph_init_task()  local
5964 		ret_stack = kmalloc(FTRACE_RETFUNC_DEPTH  in ftrace_graph_init_task()
5967 		if (!ret_stack)  in ftrace_graph_init_task()
5969 		graph_init_task(t, ret_stack);  in ftrace_graph_init_task()
5975 	struct ftrace_ret_stack	*ret_stack = t->ret_stack;  in ftrace_graph_exit_task()  local
5977 	t->ret_stack = NULL;  in ftrace_graph_exit_task()
5981 	kfree(ret_stack);  in ftrace_graph_exit_task()