TICK_DEP_BIT_SCHED
#define TICK_DEP_MASK_SCHED (1 << TICK_DEP_BIT_SCHED)
tick_nohz_dep_set_cpu(cpu, TICK_DEP_BIT_SCHED);
tick_nohz_dep_clear_cpu(cpu, TICK_DEP_BIT_SCHED);
tick_nohz_dep_set_cpu(cpu, TICK_DEP_BIT_SCHED);