TB_CPU_SOFT
#define TB_CPU_SOFT_SET(t) ((t)->t_bindflag |= TB_CPU_SOFT)
#define TB_CPU_HARD_SET(t) ((t)->t_bindflag &= ~TB_CPU_SOFT)
#define TB_CPU_IS_SOFT(t) ((t)->t_bindflag & TB_CPU_SOFT)