75 	bool			single;  member
129 		int		(*single)(unsigned int cpu);  member
134 		int		(*single)(unsigned int cpu);  member
155 	return bringup ? !step->startup.single : !step->teardown.single;  in cpuhp_step_empty()
192 		cb = bringup ? step->startup.single : step->teardown.single;  in cpuhp_invoke_callback()
701 	st->single = false;  in cpuhp_set_state()
745 	if (!st->single && st->state == st->target)  in __cpuhp_kick_ap()
1064 	if (st->single) {  in cpuhp_thread_fun()
1136 	st->single = true;  in cpuhp_invoke_ap_callback()
2073 		.startup.single		= NULL,
2074 		.teardown.single	= NULL,
2079 		.startup.single		= smpboot_create_threads,
2080 		.teardown.single	= NULL,
2085 		.startup.single		= perf_event_init_cpu,
2086 		.teardown.single	= perf_event_exit_cpu,
2090 		.startup.single		= random_prepare_cpu,
2091 		.teardown.single	= NULL,
2095 		.startup.single		= workqueue_prepare_cpu,
2096 		.teardown.single	= NULL,
2100 		.startup.single		= hrtimers_prepare_cpu,
2101 		.teardown.single	= hrtimers_dead_cpu,
2105 		.startup.single		= smpcfd_prepare_cpu,
2106 		.teardown.single	= smpcfd_dead_cpu,
2110 		.startup.single		= relay_prepare_cpu,
2111 		.teardown.single	= NULL,
2115 		.startup.single		= slab_prepare_cpu,
2116 		.teardown.single	= slab_dead_cpu,
2120 		.startup.single		= rcutree_prepare_cpu,
2121 		.teardown.single	= rcutree_dead_cpu,
2130 		.startup.single		= timers_prepare_cpu,
2131 		.teardown.single	= timers_dead_cpu,
2141 		.startup.single		= cpuhp_kick_ap_alive,
2150 		.startup.single		= cpuhp_bringup_ap,
2151 		.teardown.single	= finish_cpu,
2160 		.startup.single		= bringup_cpu,
2161 		.teardown.single	= finish_cpu,
2180 		.startup.single		= sched_cpu_starting,
2181 		.teardown.single	= sched_cpu_dying,
2185 		.startup.single		= NULL,
2186 		.teardown.single	= rcutree_dying_cpu,
2190 		.startup.single		= NULL,
2191 		.teardown.single	= smpcfd_dying_cpu,
2204 		.startup.single		= NULL,
2205 		.teardown.single	= takedown_cpu,
2211 		.startup.single		= NULL,
2212 		.teardown.single	= sched_cpu_wait_empty,
2218 		.startup.single		= smpboot_unpark_threads,
2219 		.teardown.single	= smpboot_park_threads,
2223 		.startup.single		= irq_affinity_online_cpu,
2224 		.teardown.single	= NULL,
2228 		.startup.single		= perf_event_init_cpu,
2229 		.teardown.single	= perf_event_exit_cpu,
2233 		.startup.single		= lockup_detector_online_cpu,
2234 		.teardown.single	= lockup_detector_offline_cpu,
2238 		.startup.single		= workqueue_online_cpu,
2239 		.teardown.single	= workqueue_offline_cpu,
2243 		.startup.single		= random_online_cpu,
2244 		.teardown.single	= NULL,
2248 		.startup.single		= rcutree_online_cpu,
2249 		.teardown.single	= rcutree_offline_cpu,
2260 		.startup.single		= sched_cpu_activate,
2261 		.teardown.single	= sched_cpu_deactivate,
2268 		.startup.single		= NULL,
2269 		.teardown.single	= NULL,
2341 	sp->startup.single = startup;  in cpuhp_store_callbacks()
2342 	sp->teardown.single = teardown;  in cpuhp_store_callbacks()
2351 	return cpuhp_get_step(state)->teardown.single;  in cpuhp_get_teardown_cb()
2833 	if (!sp->startup.single && !sp->teardown.single)  in fail_store()