120  * @startup:	Startup function of the step
131 	} startup;  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()
198 	cbm = bringup ? step->startup.multi : step->teardown.multi;  in cpuhp_invoke_callback()
232 	cbm = !bringup ? step->startup.multi : step->teardown.multi;  in cpuhp_invoke_callback()
872 	 * startup in cpuhp_online_idle() which allows to avoid  in bringup_cpu()
1045  * Execute teardown/startup callbacks on the plugged cpu. Also used to invoke
1840  * sends the startup IPI to the APs. The APs proceed through the low level
1844  * This avoids waiting for each AP to respond to the startup IPI in
2065 		.startup.single		= NULL,
2071 		.startup.single		= smpboot_create_threads,
2077 		.startup.single		= perf_event_init_cpu,
2082 		.startup.single		= random_prepare_cpu,
2087 		.startup.single		= workqueue_prepare_cpu,
2092 		.startup.single		= hrtimers_prepare_cpu,
2097 		.startup.single		= smpcfd_prepare_cpu,
2102 		.startup.single		= relay_prepare_cpu,
2107 		.startup.single		= rcutree_prepare_cpu,
2117 		.startup.single		= timers_prepare_cpu,
2128 		.startup.single		= cpuhp_kick_ap_alive,
2137 		.startup.single		= cpuhp_bringup_ap,
2147 		.startup.single		= bringup_cpu,
2167 		.startup.single		= sched_cpu_starting,
2172 		.startup.single		= NULL,
2177 		.startup.single		= NULL,
2182 		.startup.single		= NULL,
2187 		.startup.single		= NULL,
2201 		.startup.single		= NULL,
2208 		.startup.single		= NULL,
2215 		.startup.single		= smpboot_unpark_threads,
2220 		.startup.single		= irq_affinity_online_cpu,
2225 		.startup.single		= perf_event_init_cpu,
2230 		.startup.single		= lockup_detector_online_cpu,
2235 		.startup.single		= workqueue_online_cpu,
2240 		.startup.single		= random_online_cpu,
2245 		.startup.single		= rcutree_online_cpu,
2257 		.startup.single		= sched_cpu_activate,
2265 		.startup.single		= NULL,
2310 				 int (*startup)(unsigned int cpu),  in cpuhp_store_callbacks()
2338 	sp->startup.single = startup;  in cpuhp_store_callbacks()
2352  * Call the startup/teardown function for a step either on the AP or
2401 		/* Did we invoke the startup call on that cpu ? */  in cpuhp_rollback_install()
2423 	if (!invoke || !sp->startup.multi)  in __cpuhp_state_add_instance_cpuslocked()
2427 	 * Try to call the startup callback for each present cpu  in __cpuhp_state_add_instance_cpuslocked()
2468  * @invoke:		If true, the startup function is invoked for cpus where
2470  * @startup:		startup callback function
2484 				   int (*startup)(unsigned int cpu),  in __cpuhp_setup_state_cpuslocked()
2498 	ret = cpuhp_store_callbacks(state, name, startup, teardown,  in __cpuhp_setup_state_cpuslocked()
2507 	if (ret || !invoke || !startup)  in __cpuhp_setup_state_cpuslocked()
2511 	 * Try to call the startup callback for each present cpu  in __cpuhp_setup_state_cpuslocked()
2543 			int (*startup)(unsigned int cpu),  in __cpuhp_setup_state()
2550 	ret = __cpuhp_setup_state_cpuslocked(state, name, invoke, startup,  in __cpuhp_setup_state()
2838 	if (!sp->startup.single && !sp->teardown.single)  in fail_store()