Line data Source code
1 : /* SPDX-License-Identifier: GPL-2.0 */
2 : #ifndef __CPUHOTPLUG_H
3 : #define __CPUHOTPLUG_H
4 :
5 : #include <linux/types.h>
6 :
7 : /*
8 : * CPU-up CPU-down
9 : *
10 : * BP AP BP AP
11 : *
12 : * OFFLINE OFFLINE
13 : * | ^
14 : * v |
15 : * BRINGUP_CPU->AP_OFFLINE BRINGUP_CPU <- AP_IDLE_DEAD (idle thread/play_dead)
16 : * | AP_OFFLINE
17 : * v (IRQ-off) ,---------------^
18 : * AP_ONLNE | (stop_machine)
19 : * | TEARDOWN_CPU <- AP_ONLINE_IDLE
20 : * | ^
21 : * v |
22 : * AP_ACTIVE AP_ACTIVE
23 : */
24 :
25 : /*
26 : * CPU hotplug states. The state machine invokes the installed state
27 : * startup callbacks sequentially from CPUHP_OFFLINE + 1 to CPUHP_ONLINE
28 : * during a CPU online operation. During a CPU offline operation the
29 : * installed teardown callbacks are invoked in the reverse order from
30 : * CPU_ONLINE - 1 down to CPUHP_OFFLINE.
31 : *
32 : * The state space has three sections: PREPARE, STARTING and ONLINE.
33 : *
34 : * PREPARE: The callbacks are invoked on a control CPU before the
35 : * hotplugged CPU is started up or after the hotplugged CPU has died.
36 : *
37 : * STARTING: The callbacks are invoked on the hotplugged CPU from the low level
38 : * hotplug startup/teardown code with interrupts disabled.
39 : *
40 : * ONLINE: The callbacks are invoked on the hotplugged CPU from the per CPU
41 : * hotplug thread with interrupts and preemption enabled.
42 : *
43 : * Adding explicit states to this enum is only necessary when:
44 : *
45 : * 1) The state is within the STARTING section
46 : *
47 : * 2) The state has ordering constraints vs. other states in the
48 : * same section.
49 : *
50 : * If neither #1 nor #2 apply, please use the dynamic state space when
51 : * setting up a state by using CPUHP_PREPARE_DYN or CPUHP_PREPARE_ONLINE
52 : * for the @state argument of the setup function.
53 : *
54 : * See Documentation/core-api/cpu_hotplug.rst for further information and
55 : * examples.
56 : */
57 : enum cpuhp_state {
58 : CPUHP_INVALID = -1,
59 :
60 : /* PREPARE section invoked on a control CPU */
61 : CPUHP_OFFLINE = 0,
62 : CPUHP_CREATE_THREADS,
63 : CPUHP_PERF_PREPARE,
64 : CPUHP_PERF_X86_PREPARE,
65 : CPUHP_PERF_X86_AMD_UNCORE_PREP,
66 : CPUHP_PERF_POWER,
67 : CPUHP_PERF_SUPERH,
68 : CPUHP_X86_HPET_DEAD,
69 : CPUHP_X86_APB_DEAD,
70 : CPUHP_X86_MCE_DEAD,
71 : CPUHP_VIRT_NET_DEAD,
72 : CPUHP_SLUB_DEAD,
73 : CPUHP_DEBUG_OBJ_DEAD,
74 : CPUHP_MM_WRITEBACK_DEAD,
75 : /* Must be after CPUHP_MM_VMSTAT_DEAD */
76 : CPUHP_MM_DEMOTION_DEAD,
77 : CPUHP_MM_VMSTAT_DEAD,
78 : CPUHP_SOFTIRQ_DEAD,
79 : CPUHP_NET_MVNETA_DEAD,
80 : CPUHP_CPUIDLE_DEAD,
81 : CPUHP_ARM64_FPSIMD_DEAD,
82 : CPUHP_ARM_OMAP_WAKE_DEAD,
83 : CPUHP_IRQ_POLL_DEAD,
84 : CPUHP_BLOCK_SOFTIRQ_DEAD,
85 : CPUHP_BIO_DEAD,
86 : CPUHP_ACPI_CPUDRV_DEAD,
87 : CPUHP_S390_PFAULT_DEAD,
88 : CPUHP_BLK_MQ_DEAD,
89 : CPUHP_FS_BUFF_DEAD,
90 : CPUHP_PRINTK_DEAD,
91 : CPUHP_MM_MEMCQ_DEAD,
92 : CPUHP_XFS_DEAD,
93 : CPUHP_PERCPU_CNT_DEAD,
94 : CPUHP_RADIX_DEAD,
95 : CPUHP_PAGE_ALLOC,
96 : CPUHP_NET_DEV_DEAD,
97 : CPUHP_PCI_XGENE_DEAD,
98 : CPUHP_IOMMU_IOVA_DEAD,
99 : CPUHP_LUSTRE_CFS_DEAD,
100 : CPUHP_AP_ARM_CACHE_B15_RAC_DEAD,
101 : CPUHP_PADATA_DEAD,
102 : CPUHP_AP_DTPM_CPU_DEAD,
103 : CPUHP_RANDOM_PREPARE,
104 : CPUHP_WORKQUEUE_PREP,
105 : CPUHP_POWER_NUMA_PREPARE,
106 : CPUHP_HRTIMERS_PREPARE,
107 : CPUHP_PROFILE_PREPARE,
108 : CPUHP_X2APIC_PREPARE,
109 : CPUHP_SMPCFD_PREPARE,
110 : CPUHP_RELAY_PREPARE,
111 : CPUHP_SLAB_PREPARE,
112 : CPUHP_MD_RAID5_PREPARE,
113 : CPUHP_RCUTREE_PREP,
114 : CPUHP_CPUIDLE_COUPLED_PREPARE,
115 : CPUHP_POWERPC_PMAC_PREPARE,
116 : CPUHP_POWERPC_MMU_CTX_PREPARE,
117 : CPUHP_XEN_PREPARE,
118 : CPUHP_XEN_EVTCHN_PREPARE,
119 : CPUHP_ARM_SHMOBILE_SCU_PREPARE,
120 : CPUHP_SH_SH3X_PREPARE,
121 : CPUHP_NET_FLOW_PREPARE,
122 : CPUHP_TOPOLOGY_PREPARE,
123 : CPUHP_NET_IUCV_PREPARE,
124 : CPUHP_ARM_BL_PREPARE,
125 : CPUHP_TRACE_RB_PREPARE,
126 : CPUHP_MM_ZS_PREPARE,
127 : CPUHP_MM_ZSWP_MEM_PREPARE,
128 : CPUHP_MM_ZSWP_POOL_PREPARE,
129 : CPUHP_KVM_PPC_BOOK3S_PREPARE,
130 : CPUHP_ZCOMP_PREPARE,
131 : CPUHP_TIMERS_PREPARE,
132 : CPUHP_MIPS_SOC_PREPARE,
133 : CPUHP_BP_PREPARE_DYN,
134 : CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20,
135 : CPUHP_BRINGUP_CPU,
136 :
137 : /*
138 : * STARTING section invoked on the hotplugged CPU in low level
139 : * bringup and teardown code.
140 : */
141 : CPUHP_AP_IDLE_DEAD,
142 : CPUHP_AP_OFFLINE,
143 : CPUHP_AP_SCHED_STARTING,
144 : CPUHP_AP_RCUTREE_DYING,
145 : CPUHP_AP_CPU_PM_STARTING,
146 : CPUHP_AP_IRQ_GIC_STARTING,
147 : CPUHP_AP_IRQ_HIP04_STARTING,
148 : CPUHP_AP_IRQ_APPLE_AIC_STARTING,
149 : CPUHP_AP_IRQ_ARMADA_XP_STARTING,
150 : CPUHP_AP_IRQ_BCM2836_STARTING,
151 : CPUHP_AP_IRQ_MIPS_GIC_STARTING,
152 : CPUHP_AP_IRQ_RISCV_STARTING,
153 : CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING,
154 : CPUHP_AP_ARM_MVEBU_COHERENCY,
155 : CPUHP_AP_MICROCODE_LOADER,
156 : CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING,
157 : CPUHP_AP_PERF_X86_STARTING,
158 : CPUHP_AP_PERF_X86_AMD_IBS_STARTING,
159 : CPUHP_AP_PERF_X86_CQM_STARTING,
160 : CPUHP_AP_PERF_X86_CSTATE_STARTING,
161 : CPUHP_AP_PERF_XTENSA_STARTING,
162 : CPUHP_AP_MIPS_OP_LOONGSON3_STARTING,
163 : CPUHP_AP_ARM_SDEI_STARTING,
164 : CPUHP_AP_ARM_VFP_STARTING,
165 : CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING,
166 : CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING,
167 : CPUHP_AP_PERF_ARM_ACPI_STARTING,
168 : CPUHP_AP_PERF_ARM_STARTING,
169 : CPUHP_AP_PERF_RISCV_STARTING,
170 : CPUHP_AP_ARM_L2X0_STARTING,
171 : CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING,
172 : CPUHP_AP_ARM_ARCH_TIMER_STARTING,
173 : CPUHP_AP_ARM_GLOBAL_TIMER_STARTING,
174 : CPUHP_AP_JCORE_TIMER_STARTING,
175 : CPUHP_AP_ARM_TWD_STARTING,
176 : CPUHP_AP_QCOM_TIMER_STARTING,
177 : CPUHP_AP_TEGRA_TIMER_STARTING,
178 : CPUHP_AP_ARMADA_TIMER_STARTING,
179 : CPUHP_AP_MARCO_TIMER_STARTING,
180 : CPUHP_AP_MIPS_GIC_TIMER_STARTING,
181 : CPUHP_AP_ARC_TIMER_STARTING,
182 : CPUHP_AP_RISCV_TIMER_STARTING,
183 : CPUHP_AP_CLINT_TIMER_STARTING,
184 : CPUHP_AP_CSKY_TIMER_STARTING,
185 : CPUHP_AP_TI_GP_TIMER_STARTING,
186 : CPUHP_AP_HYPERV_TIMER_STARTING,
187 : CPUHP_AP_KVM_STARTING,
188 : CPUHP_AP_KVM_ARM_VGIC_INIT_STARTING,
189 : CPUHP_AP_KVM_ARM_VGIC_STARTING,
190 : CPUHP_AP_KVM_ARM_TIMER_STARTING,
191 : /* Must be the last timer callback */
192 : CPUHP_AP_DUMMY_TIMER_STARTING,
193 : CPUHP_AP_ARM_XEN_STARTING,
194 : CPUHP_AP_ARM_CORESIGHT_STARTING,
195 : CPUHP_AP_ARM_CORESIGHT_CTI_STARTING,
196 : CPUHP_AP_ARM64_ISNDEP_STARTING,
197 : CPUHP_AP_SMPCFD_DYING,
198 : CPUHP_AP_X86_TBOOT_DYING,
199 : CPUHP_AP_ARM_CACHE_B15_RAC_DYING,
200 : CPUHP_AP_ONLINE,
201 : CPUHP_TEARDOWN_CPU,
202 :
203 : /* Online section invoked on the hotplugged CPU from the hotplug thread */
204 : CPUHP_AP_ONLINE_IDLE,
205 : CPUHP_AP_SCHED_WAIT_EMPTY,
206 : CPUHP_AP_SMPBOOT_THREADS,
207 : CPUHP_AP_X86_VDSO_VMA_ONLINE,
208 : CPUHP_AP_IRQ_AFFINITY_ONLINE,
209 : CPUHP_AP_BLK_MQ_ONLINE,
210 : CPUHP_AP_ARM_MVEBU_SYNC_CLOCKS,
211 : CPUHP_AP_X86_INTEL_EPB_ONLINE,
212 : CPUHP_AP_PERF_ONLINE,
213 : CPUHP_AP_PERF_X86_ONLINE,
214 : CPUHP_AP_PERF_X86_UNCORE_ONLINE,
215 : CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE,
216 : CPUHP_AP_PERF_X86_AMD_POWER_ONLINE,
217 : CPUHP_AP_PERF_X86_RAPL_ONLINE,
218 : CPUHP_AP_PERF_X86_CQM_ONLINE,
219 : CPUHP_AP_PERF_X86_CSTATE_ONLINE,
220 : CPUHP_AP_PERF_X86_IDXD_ONLINE,
221 : CPUHP_AP_PERF_S390_CF_ONLINE,
222 : CPUHP_AP_PERF_S390_SF_ONLINE,
223 : CPUHP_AP_PERF_ARM_CCI_ONLINE,
224 : CPUHP_AP_PERF_ARM_CCN_ONLINE,
225 : CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
226 : CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
227 : CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
228 : CPUHP_AP_PERF_ARM_HISI_PA_ONLINE,
229 : CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE,
230 : CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE,
231 : CPUHP_AP_PERF_ARM_L2X0_ONLINE,
232 : CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE,
233 : CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE,
234 : CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE,
235 : CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE,
236 : CPUHP_AP_PERF_ARM_MARVELL_CN10K_DDR_ONLINE,
237 : CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE,
238 : CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE,
239 : CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE,
240 : CPUHP_AP_PERF_POWERPC_TRACE_IMC_ONLINE,
241 : CPUHP_AP_PERF_POWERPC_HV_24x7_ONLINE,
242 : CPUHP_AP_PERF_POWERPC_HV_GPCI_ONLINE,
243 : CPUHP_AP_PERF_CSKY_ONLINE,
244 : CPUHP_AP_WATCHDOG_ONLINE,
245 : CPUHP_AP_WORKQUEUE_ONLINE,
246 : CPUHP_AP_RANDOM_ONLINE,
247 : CPUHP_AP_RCUTREE_ONLINE,
248 : CPUHP_AP_BASE_CACHEINFO_ONLINE,
249 : CPUHP_AP_ONLINE_DYN,
250 : CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 30,
251 : /* Must be after CPUHP_AP_ONLINE_DYN for node_states[N_CPU] update */
252 : CPUHP_AP_MM_DEMOTION_ONLINE,
253 : CPUHP_AP_X86_HPET_ONLINE,
254 : CPUHP_AP_X86_KVM_CLK_ONLINE,
255 : CPUHP_AP_ACTIVE,
256 : CPUHP_ONLINE,
257 : };
258 :
259 : int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke,
260 : int (*startup)(unsigned int cpu),
261 : int (*teardown)(unsigned int cpu), bool multi_instance);
262 :
263 : int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name,
264 : bool invoke,
265 : int (*startup)(unsigned int cpu),
266 : int (*teardown)(unsigned int cpu),
267 : bool multi_instance);
268 : /**
269 : * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup
270 : * callback
271 : * @state: The state for which the calls are installed
272 : * @name: Name of the callback (will be used in debug output)
273 : * @startup: startup callback function or NULL if not required
274 : * @teardown: teardown callback function or NULL if not required
275 : *
276 : * Installs the callback functions and invokes the @startup callback on
277 : * the online cpus which have already reached the @state.
278 : */
279 : static inline int cpuhp_setup_state(enum cpuhp_state state,
280 : const char *name,
281 : int (*startup)(unsigned int cpu),
282 : int (*teardown)(unsigned int cpu))
283 : {
284 5 : return __cpuhp_setup_state(state, name, true, startup, teardown, false);
285 : }
286 :
287 : /**
288 : * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling
289 : * @startup callback from a cpus_read_lock()
290 : * held region
291 : * @state: The state for which the calls are installed
292 : * @name: Name of the callback (will be used in debug output)
293 : * @startup: startup callback function or NULL if not required
294 : * @teardown: teardown callback function or NULL if not required
295 : *
296 : * Same as cpuhp_setup_state() except that it must be invoked from within a
297 : * cpus_read_lock() held region.
298 : */
299 : static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state,
300 : const char *name,
301 : int (*startup)(unsigned int cpu),
302 : int (*teardown)(unsigned int cpu))
303 : {
304 : return __cpuhp_setup_state_cpuslocked(state, name, true, startup,
305 : teardown, false);
306 : }
307 :
308 : /**
309 : * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the
310 : * @startup callback
311 : * @state: The state for which the calls are installed
312 : * @name: Name of the callback.
313 : * @startup: startup callback function or NULL if not required
314 : * @teardown: teardown callback function or NULL if not required
315 : *
316 : * Same as cpuhp_setup_state() except that the @startup callback is not
317 : * invoked during installation. NOP if SMP=n or HOTPLUG_CPU=n.
318 : */
319 : static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state,
320 : const char *name,
321 : int (*startup)(unsigned int cpu),
322 : int (*teardown)(unsigned int cpu))
323 : {
324 9 : return __cpuhp_setup_state(state, name, false, startup, teardown,
325 : false);
326 : }
327 :
328 : /**
329 : * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without
330 : * invoking the @startup callback from
331 : * a cpus_read_lock() held region
332 : * callbacks
333 : * @state: The state for which the calls are installed
334 : * @name: Name of the callback.
335 : * @startup: startup callback function or NULL if not required
336 : * @teardown: teardown callback function or NULL if not required
337 : *
338 : * Same as cpuhp_setup_state_nocalls() except that it must be invoked from
339 : * within a cpus_read_lock() held region.
340 : */
341 : static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,
342 : const char *name,
343 : int (*startup)(unsigned int cpu),
344 : int (*teardown)(unsigned int cpu))
345 : {
346 : return __cpuhp_setup_state_cpuslocked(state, name, false, startup,
347 : teardown, false);
348 : }
349 :
350 : /**
351 : * cpuhp_setup_state_multi - Add callbacks for multi state
352 : * @state: The state for which the calls are installed
353 : * @name: Name of the callback.
354 : * @startup: startup callback function or NULL if not required
355 : * @teardown: teardown callback function or NULL if not required
356 : *
357 : * Sets the internal multi_instance flag and prepares a state to work as a multi
358 : * instance callback. No callbacks are invoked at this point. The callbacks are
359 : * invoked once an instance for this state are registered via
360 : * cpuhp_state_add_instance() or cpuhp_state_add_instance_nocalls()
361 : */
362 : static inline int cpuhp_setup_state_multi(enum cpuhp_state state,
363 : const char *name,
364 : int (*startup)(unsigned int cpu,
365 : struct hlist_node *node),
366 : int (*teardown)(unsigned int cpu,
367 : struct hlist_node *node))
368 : {
369 4 : return __cpuhp_setup_state(state, name, false,
370 : (void *) startup,
371 : (void *) teardown, true);
372 : }
373 :
374 : int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node,
375 : bool invoke);
376 : int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state,
377 : struct hlist_node *node, bool invoke);
378 :
379 : /**
380 : * cpuhp_state_add_instance - Add an instance for a state and invoke startup
381 : * callback.
382 : * @state: The state for which the instance is installed
383 : * @node: The node for this individual state.
384 : *
385 : * Installs the instance for the @state and invokes the registered startup
386 : * callback on the online cpus which have already reached the @state. The
387 : * @state must have been earlier marked as multi-instance by
388 : * cpuhp_setup_state_multi().
389 : */
390 : static inline int cpuhp_state_add_instance(enum cpuhp_state state,
391 : struct hlist_node *node)
392 : {
393 : return __cpuhp_state_add_instance(state, node, true);
394 : }
395 :
396 : /**
397 : * cpuhp_state_add_instance_nocalls - Add an instance for a state without
398 : * invoking the startup callback.
399 : * @state: The state for which the instance is installed
400 : * @node: The node for this individual state.
401 : *
402 : * Installs the instance for the @state. The @state must have been earlier
403 : * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or
404 : * HOTPLUG_CPU=n.
405 : */
406 : static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state,
407 : struct hlist_node *node)
408 : {
409 1 : return __cpuhp_state_add_instance(state, node, false);
410 : }
411 :
412 : /**
413 : * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state
414 : * without invoking the startup
415 : * callback from a cpus_read_lock()
416 : * held region.
417 : * @state: The state for which the instance is installed
418 : * @node: The node for this individual state.
419 : *
420 : * Same as cpuhp_state_add_instance_nocalls() except that it must be
421 : * invoked from within a cpus_read_lock() held region.
422 : */
423 : static inline int
424 : cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,
425 : struct hlist_node *node)
426 : {
427 : return __cpuhp_state_add_instance_cpuslocked(state, node, false);
428 : }
429 :
430 : void __cpuhp_remove_state(enum cpuhp_state state, bool invoke);
431 : void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke);
432 :
433 : /**
434 : * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown
435 : * @state: The state for which the calls are removed
436 : *
437 : * Removes the callback functions and invokes the teardown callback on
438 : * the online cpus which have already reached the @state.
439 : */
440 : static inline void cpuhp_remove_state(enum cpuhp_state state)
441 : {
442 : __cpuhp_remove_state(state, true);
443 : }
444 :
445 : /**
446 : * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking
447 : * the teardown callback
448 : * @state: The state for which the calls are removed
449 : */
450 : static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state)
451 : {
452 : __cpuhp_remove_state(state, false);
453 : }
454 :
455 : /**
456 : * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking
457 : * teardown from a cpus_read_lock() held region.
458 : * @state: The state for which the calls are removed
459 : *
460 : * Same as cpuhp_remove_state nocalls() except that it must be invoked
461 : * from within a cpus_read_lock() held region.
462 : */
463 : static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)
464 : {
465 : __cpuhp_remove_state_cpuslocked(state, false);
466 : }
467 :
468 : /**
469 : * cpuhp_remove_multi_state - Remove hotplug multi state callback
470 : * @state: The state for which the calls are removed
471 : *
472 : * Removes the callback functions from a multi state. This is the reverse of
473 : * cpuhp_setup_state_multi(). All instances should have been removed before
474 : * invoking this function.
475 : */
476 : static inline void cpuhp_remove_multi_state(enum cpuhp_state state)
477 : {
478 : __cpuhp_remove_state(state, false);
479 : }
480 :
481 : int __cpuhp_state_remove_instance(enum cpuhp_state state,
482 : struct hlist_node *node, bool invoke);
483 :
484 : /**
485 : * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke
486 : * the teardown callback
487 : * @state: The state from which the instance is removed
488 : * @node: The node for this individual state.
489 : *
490 : * Removes the instance and invokes the teardown callback on the online cpus
491 : * which have already reached @state.
492 : */
493 : static inline int cpuhp_state_remove_instance(enum cpuhp_state state,
494 : struct hlist_node *node)
495 : {
496 : return __cpuhp_state_remove_instance(state, node, true);
497 : }
498 :
499 : /**
500 : * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state
501 : * without invoking the teardown callback
502 : * @state: The state from which the instance is removed
503 : * @node: The node for this individual state.
504 : *
505 : * Removes the instance without invoking the teardown callback.
506 : */
507 : static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,
508 : struct hlist_node *node)
509 : {
510 0 : return __cpuhp_state_remove_instance(state, node, false);
511 : }
512 :
513 : #ifdef CONFIG_SMP
514 : void cpuhp_online_idle(enum cpuhp_state state);
515 : #else
516 : static inline void cpuhp_online_idle(enum cpuhp_state state) { }
517 : #endif
518 :
519 : #endif
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