74 	bool			single;  member
128 		int		(*single)(unsigned int cpu);  member
133 		int		(*single)(unsigned int cpu);  member
154 	return bringup ? !step->startup.single : !step->teardown.single;  in cpuhp_step_empty()
191 		cb = bringup ? step->startup.single : step->teardown.single;  in cpuhp_invoke_callback()
719 	st->single = false;  in cpuhp_set_state()
763 	if (!st->single && st->state == st->target)  in __cpuhp_kick_ap()
1083 	if (st->single) {  in cpuhp_thread_fun()
1155 	st->single = true;  in cpuhp_invoke_ap_callback()
2062 		.startup.single		= NULL,
2063 		.teardown.single	= NULL,
2068 		.startup.single		= smpboot_create_threads,
2069 		.teardown.single	= NULL,
2074 		.startup.single		= perf_event_init_cpu,
2075 		.teardown.single	= perf_event_exit_cpu,
2079 		.startup.single		= random_prepare_cpu,
2080 		.teardown.single	= NULL,
2084 		.startup.single		= workqueue_prepare_cpu,
2085 		.teardown.single	= NULL,
2089 		.startup.single		= hrtimers_prepare_cpu,
2090 		.teardown.single	= NULL,
2094 		.startup.single		= smpcfd_prepare_cpu,
2095 		.teardown.single	= smpcfd_dead_cpu,
2099 		.startup.single		= relay_prepare_cpu,
2100 		.teardown.single	= NULL,
2104 		.startup.single		= rcutree_prepare_cpu,
2105 		.teardown.single	= rcutree_dead_cpu,
2114 		.startup.single		= timers_prepare_cpu,
2115 		.teardown.single	= timers_dead_cpu,
2125 		.startup.single		= cpuhp_kick_ap_alive,
2134 		.startup.single		= cpuhp_bringup_ap,
2135 		.teardown.single	= finish_cpu,
2144 		.startup.single		= bringup_cpu,
2145 		.teardown.single	= finish_cpu,
2164 		.startup.single		= sched_cpu_starting,
2165 		.teardown.single	= sched_cpu_dying,
2169 		.startup.single		= NULL,
2170 		.teardown.single	= rcutree_dying_cpu,
2174 		.startup.single		= NULL,
2175 		.teardown.single	= smpcfd_dying_cpu,
2179 		.startup.single		= hrtimers_cpu_starting,
2180 		.teardown.single	= hrtimers_cpu_dying,
2184 		.startup.single		= NULL,
2185 		.teardown.single	= tick_cpu_dying,
2198 		.startup.single		= NULL,
2199 		.teardown.single	= takedown_cpu,
2205 		.startup.single		= NULL,
2206 		.teardown.single	= sched_cpu_wait_empty,
2212 		.startup.single		= smpboot_unpark_threads,
2213 		.teardown.single	= smpboot_park_threads,
2217 		.startup.single		= irq_affinity_online_cpu,
2218 		.teardown.single	= NULL,
2222 		.startup.single		= perf_event_init_cpu,
2223 		.teardown.single	= perf_event_exit_cpu,
2227 		.startup.single		= lockup_detector_online_cpu,
2228 		.teardown.single	= lockup_detector_offline_cpu,
2232 		.startup.single		= workqueue_online_cpu,
2233 		.teardown.single	= workqueue_offline_cpu,
2237 		.startup.single		= random_online_cpu,
2238 		.teardown.single	= NULL,
2242 		.startup.single		= rcutree_online_cpu,
2243 		.teardown.single	= rcutree_offline_cpu,
2254 		.startup.single		= sched_cpu_activate,
2255 		.teardown.single	= sched_cpu_deactivate,
2262 		.startup.single		= NULL,
2263 		.teardown.single	= NULL,
2335 	sp->startup.single = startup;  in cpuhp_store_callbacks()
2336 	sp->teardown.single = teardown;  in cpuhp_store_callbacks()
2345 	return cpuhp_get_step(state)->teardown.single;  in cpuhp_get_teardown_cb()
2835 	if (!sp->startup.single && !sp->teardown.single)  in fail_store()