subtime 763 include/linux/ftrace.h unsigned long long subtime; subtime 808 kernel/trace/ftrace.c ret_stack->subtime = 0; subtime 837 kernel/trace/ftrace.c ret_stack->subtime += calltime; subtime 840 kernel/trace/ftrace.c if (ret_stack && ret_stack->subtime < calltime) subtime 841 kernel/trace/ftrace.c calltime -= ret_stack->subtime;