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 * CPUHP_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_BP_PREPARE_DYN or CPUHP_AP_ONLINE_DYN 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_MCE_DEAD, 70 CPUHP_VIRT_NET_DEAD, 71 CPUHP_IBMVNIC_DEAD, 72 CPUHP_SLUB_DEAD, 73 CPUHP_DEBUG_OBJ_DEAD, 74 CPUHP_MM_WRITEBACK_DEAD, 75 CPUHP_MM_VMSTAT_DEAD, 76 CPUHP_SOFTIRQ_DEAD, 77 CPUHP_NET_MVNETA_DEAD, 78 CPUHP_CPUIDLE_DEAD, 79 CPUHP_ARM64_FPSIMD_DEAD, 80 CPUHP_ARM_OMAP_WAKE_DEAD, 81 CPUHP_IRQ_POLL_DEAD, 82 CPUHP_BLOCK_SOFTIRQ_DEAD, 83 CPUHP_BIO_DEAD, 84 CPUHP_ACPI_CPUDRV_DEAD, 85 CPUHP_S390_PFAULT_DEAD, 86 CPUHP_BLK_MQ_DEAD, 87 CPUHP_FS_BUFF_DEAD, 88 CPUHP_PRINTK_DEAD, 89 CPUHP_MM_MEMCQ_DEAD, 90 CPUHP_PERCPU_CNT_DEAD, 91 CPUHP_RADIX_DEAD, 92 CPUHP_PAGE_ALLOC, 93 CPUHP_NET_DEV_DEAD, 94 CPUHP_PCI_XGENE_DEAD, 95 CPUHP_IOMMU_IOVA_DEAD, 96 CPUHP_AP_ARM_CACHE_B15_RAC_DEAD, 97 CPUHP_PADATA_DEAD, 98 CPUHP_AP_DTPM_CPU_DEAD, 99 CPUHP_RANDOM_PREPARE, 100 CPUHP_WORKQUEUE_PREP, 101 CPUHP_POWER_NUMA_PREPARE, 102 CPUHP_HRTIMERS_PREPARE, 103 CPUHP_X2APIC_PREPARE, 104 CPUHP_SMPCFD_PREPARE, 105 CPUHP_RELAY_PREPARE, 106 CPUHP_MD_RAID5_PREPARE, 107 CPUHP_RCUTREE_PREP, 108 CPUHP_CPUIDLE_COUPLED_PREPARE, 109 CPUHP_POWERPC_PMAC_PREPARE, 110 CPUHP_POWERPC_MMU_CTX_PREPARE, 111 CPUHP_XEN_PREPARE, 112 CPUHP_XEN_EVTCHN_PREPARE, 113 CPUHP_ARM_SHMOBILE_SCU_PREPARE, 114 CPUHP_SH_SH3X_PREPARE, 115 CPUHP_TOPOLOGY_PREPARE, 116 CPUHP_NET_IUCV_PREPARE, 117 CPUHP_ARM_BL_PREPARE, 118 CPUHP_TRACE_RB_PREPARE, 119 CPUHP_MM_ZS_PREPARE, 120 CPUHP_MM_ZSWP_POOL_PREPARE, 121 CPUHP_KVM_PPC_BOOK3S_PREPARE, 122 CPUHP_ZCOMP_PREPARE, 123 CPUHP_TIMERS_PREPARE, 124 CPUHP_TMIGR_PREPARE, 125 CPUHP_MIPS_SOC_PREPARE, 126 CPUHP_BP_PREPARE_DYN, 127 CPUHP_BP_PREPARE_DYN_END = CPUHP_BP_PREPARE_DYN + 20, 128 CPUHP_BP_KICK_AP, 129 CPUHP_BRINGUP_CPU, 130 131 /* 132 * STARTING section invoked on the hotplugged CPU in low level 133 * bringup and teardown code. 134 */ 135 CPUHP_AP_IDLE_DEAD, 136 CPUHP_AP_OFFLINE, 137 CPUHP_AP_CACHECTRL_STARTING, 138 CPUHP_AP_SCHED_STARTING, 139 CPUHP_AP_RCUTREE_DYING, 140 CPUHP_AP_CPU_PM_STARTING, 141 CPUHP_AP_IRQ_GIC_STARTING, 142 CPUHP_AP_IRQ_HIP04_STARTING, 143 CPUHP_AP_IRQ_APPLE_AIC_STARTING, 144 CPUHP_AP_IRQ_ARMADA_XP_STARTING, 145 CPUHP_AP_IRQ_BCM2836_STARTING, 146 CPUHP_AP_IRQ_MIPS_GIC_STARTING, 147 CPUHP_AP_IRQ_EIOINTC_STARTING, 148 CPUHP_AP_IRQ_AVECINTC_STARTING, 149 CPUHP_AP_IRQ_SIFIVE_PLIC_STARTING, 150 CPUHP_AP_IRQ_RISCV_IMSIC_STARTING, 151 CPUHP_AP_IRQ_RISCV_SBI_IPI_STARTING, 152 CPUHP_AP_ARM_MVEBU_COHERENCY, 153 CPUHP_AP_PERF_X86_AMD_UNCORE_STARTING, 154 CPUHP_AP_PERF_X86_STARTING, 155 CPUHP_AP_PERF_X86_AMD_IBS_STARTING, 156 CPUHP_AP_PERF_XTENSA_STARTING, 157 CPUHP_AP_ARM_VFP_STARTING, 158 CPUHP_AP_ARM64_DEBUG_MONITORS_STARTING, 159 CPUHP_AP_PERF_ARM_HW_BREAKPOINT_STARTING, 160 CPUHP_AP_PERF_ARM_ACPI_STARTING, 161 CPUHP_AP_PERF_ARM_STARTING, 162 CPUHP_AP_PERF_RISCV_STARTING, 163 CPUHP_AP_ARM_L2X0_STARTING, 164 CPUHP_AP_EXYNOS4_MCT_TIMER_STARTING, 165 CPUHP_AP_ARM_ARCH_TIMER_STARTING, 166 CPUHP_AP_ARM_ARCH_TIMER_EVTSTRM_STARTING, 167 CPUHP_AP_ARM_GLOBAL_TIMER_STARTING, 168 CPUHP_AP_JCORE_TIMER_STARTING, 169 CPUHP_AP_ARM_TWD_STARTING, 170 CPUHP_AP_QCOM_TIMER_STARTING, 171 CPUHP_AP_TEGRA_TIMER_STARTING, 172 CPUHP_AP_ARMADA_TIMER_STARTING, 173 CPUHP_AP_MIPS_GIC_TIMER_STARTING, 174 CPUHP_AP_ARC_TIMER_STARTING, 175 CPUHP_AP_REALTEK_TIMER_STARTING, 176 CPUHP_AP_RISCV_TIMER_STARTING, 177 CPUHP_AP_CLINT_TIMER_STARTING, 178 CPUHP_AP_CSKY_TIMER_STARTING, 179 CPUHP_AP_TI_GP_TIMER_STARTING, 180 CPUHP_AP_HYPERV_TIMER_STARTING, 181 /* Must be the last timer callback */ 182 CPUHP_AP_DUMMY_TIMER_STARTING, 183 CPUHP_AP_ARM_XEN_STARTING, 184 CPUHP_AP_ARM_XEN_RUNSTATE_STARTING, 185 CPUHP_AP_ARM_CORESIGHT_STARTING, 186 CPUHP_AP_ARM_CORESIGHT_CTI_STARTING, 187 CPUHP_AP_ARM64_ISNDEP_STARTING, 188 CPUHP_AP_SMPCFD_DYING, 189 CPUHP_AP_HRTIMERS_DYING, 190 CPUHP_AP_TICK_DYING, 191 CPUHP_AP_X86_TBOOT_DYING, 192 CPUHP_AP_ARM_CACHE_B15_RAC_DYING, 193 CPUHP_AP_ONLINE, 194 CPUHP_TEARDOWN_CPU, 195 196 /* Online section invoked on the hotplugged CPU from the hotplug thread */ 197 CPUHP_AP_ONLINE_IDLE, 198 CPUHP_AP_HYPERV_ONLINE, 199 CPUHP_AP_KVM_ONLINE, 200 CPUHP_AP_SCHED_WAIT_EMPTY, 201 CPUHP_AP_SMPBOOT_THREADS, 202 CPUHP_AP_IRQ_AFFINITY_ONLINE, 203 CPUHP_AP_BLK_MQ_ONLINE, 204 CPUHP_AP_ARM_MVEBU_SYNC_CLOCKS, 205 CPUHP_AP_X86_INTEL_EPB_ONLINE, 206 CPUHP_AP_PERF_ONLINE, 207 CPUHP_AP_PERF_X86_ONLINE, 208 CPUHP_AP_PERF_X86_UNCORE_ONLINE, 209 CPUHP_AP_PERF_X86_AMD_UNCORE_ONLINE, 210 CPUHP_AP_PERF_X86_AMD_POWER_ONLINE, 211 CPUHP_AP_PERF_X86_RAPL_ONLINE, 212 CPUHP_AP_PERF_S390_CF_ONLINE, 213 CPUHP_AP_PERF_S390_SF_ONLINE, 214 CPUHP_AP_PERF_ARM_CCI_ONLINE, 215 CPUHP_AP_PERF_ARM_CCN_ONLINE, 216 CPUHP_AP_PERF_ARM_HISI_CPA_ONLINE, 217 CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE, 218 CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE, 219 CPUHP_AP_PERF_ARM_HISI_L3_ONLINE, 220 CPUHP_AP_PERF_ARM_HISI_PA_ONLINE, 221 CPUHP_AP_PERF_ARM_HISI_SLLC_ONLINE, 222 CPUHP_AP_PERF_ARM_HISI_PCIE_PMU_ONLINE, 223 CPUHP_AP_PERF_ARM_HNS3_PMU_ONLINE, 224 CPUHP_AP_PERF_ARM_L2X0_ONLINE, 225 CPUHP_AP_PERF_ARM_QCOM_L2_ONLINE, 226 CPUHP_AP_PERF_ARM_QCOM_L3_ONLINE, 227 CPUHP_AP_PERF_ARM_APM_XGENE_ONLINE, 228 CPUHP_AP_PERF_ARM_CAVIUM_TX2_UNCORE_ONLINE, 229 CPUHP_AP_PERF_ARM_MARVELL_CN10K_DDR_ONLINE, 230 CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE, 231 CPUHP_AP_PERF_POWERPC_CORE_IMC_ONLINE, 232 CPUHP_AP_PERF_POWERPC_THREAD_IMC_ONLINE, 233 CPUHP_AP_PERF_POWERPC_TRACE_IMC_ONLINE, 234 CPUHP_AP_PERF_POWERPC_HV_24x7_ONLINE, 235 CPUHP_AP_PERF_POWERPC_HV_GPCI_ONLINE, 236 CPUHP_AP_PERF_CSKY_ONLINE, 237 CPUHP_AP_TMIGR_ONLINE, 238 CPUHP_AP_WATCHDOG_ONLINE, 239 CPUHP_AP_WORKQUEUE_ONLINE, 240 CPUHP_AP_RANDOM_ONLINE, 241 CPUHP_AP_RCUTREE_ONLINE, 242 CPUHP_AP_BASE_CACHEINFO_ONLINE, 243 CPUHP_AP_ONLINE_DYN, 244 CPUHP_AP_ONLINE_DYN_END = CPUHP_AP_ONLINE_DYN + 40, 245 CPUHP_AP_X86_HPET_ONLINE, 246 CPUHP_AP_X86_KVM_CLK_ONLINE, 247 CPUHP_AP_ACTIVE, 248 CPUHP_ONLINE, 249 }; 250 251 int __cpuhp_setup_state(enum cpuhp_state state, const char *name, bool invoke, 252 int (*startup)(unsigned int cpu), 253 int (*teardown)(unsigned int cpu), bool multi_instance); 254 255 int __cpuhp_setup_state_cpuslocked(enum cpuhp_state state, const char *name, 256 bool invoke, 257 int (*startup)(unsigned int cpu), 258 int (*teardown)(unsigned int cpu), 259 bool multi_instance); 260 /** 261 * cpuhp_setup_state - Setup hotplug state callbacks with calling the @startup 262 * callback 263 * @state: The state for which the calls are installed 264 * @name: Name of the callback (will be used in debug output) 265 * @startup: startup callback function or NULL if not required 266 * @teardown: teardown callback function or NULL if not required 267 * 268 * Installs the callback functions and invokes the @startup callback on 269 * the online cpus which have already reached the @state. 270 */ cpuhp_setup_state(enum cpuhp_state state,const char * name,int (* startup)(unsigned int cpu),int (* teardown)(unsigned int cpu))271 static inline int cpuhp_setup_state(enum cpuhp_state state, 272 const char *name, 273 int (*startup)(unsigned int cpu), 274 int (*teardown)(unsigned int cpu)) 275 { 276 return __cpuhp_setup_state(state, name, true, startup, teardown, false); 277 } 278 279 /** 280 * cpuhp_setup_state_cpuslocked - Setup hotplug state callbacks with calling 281 * @startup callback from a cpus_read_lock() 282 * held region 283 * @state: The state for which the calls are installed 284 * @name: Name of the callback (will be used in debug output) 285 * @startup: startup callback function or NULL if not required 286 * @teardown: teardown callback function or NULL if not required 287 * 288 * Same as cpuhp_setup_state() except that it must be invoked from within a 289 * cpus_read_lock() held region. 290 */ cpuhp_setup_state_cpuslocked(enum cpuhp_state state,const char * name,int (* startup)(unsigned int cpu),int (* teardown)(unsigned int cpu))291 static inline int cpuhp_setup_state_cpuslocked(enum cpuhp_state state, 292 const char *name, 293 int (*startup)(unsigned int cpu), 294 int (*teardown)(unsigned int cpu)) 295 { 296 return __cpuhp_setup_state_cpuslocked(state, name, true, startup, 297 teardown, false); 298 } 299 300 /** 301 * cpuhp_setup_state_nocalls - Setup hotplug state callbacks without calling the 302 * @startup callback 303 * @state: The state for which the calls are installed 304 * @name: Name of the callback. 305 * @startup: startup callback function or NULL if not required 306 * @teardown: teardown callback function or NULL if not required 307 * 308 * Same as cpuhp_setup_state() except that the @startup callback is not 309 * invoked during installation. NOP if SMP=n or HOTPLUG_CPU=n. 310 */ cpuhp_setup_state_nocalls(enum cpuhp_state state,const char * name,int (* startup)(unsigned int cpu),int (* teardown)(unsigned int cpu))311 static inline int cpuhp_setup_state_nocalls(enum cpuhp_state state, 312 const char *name, 313 int (*startup)(unsigned int cpu), 314 int (*teardown)(unsigned int cpu)) 315 { 316 return __cpuhp_setup_state(state, name, false, startup, teardown, 317 false); 318 } 319 320 /** 321 * cpuhp_setup_state_nocalls_cpuslocked - Setup hotplug state callbacks without 322 * invoking the @startup callback from 323 * a cpus_read_lock() held region 324 * callbacks 325 * @state: The state for which the calls are installed 326 * @name: Name of the callback. 327 * @startup: startup callback function or NULL if not required 328 * @teardown: teardown callback function or NULL if not required 329 * 330 * Same as cpuhp_setup_state_nocalls() except that it must be invoked from 331 * within a cpus_read_lock() held region. 332 */ cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state,const char * name,int (* startup)(unsigned int cpu),int (* teardown)(unsigned int cpu))333 static inline int cpuhp_setup_state_nocalls_cpuslocked(enum cpuhp_state state, 334 const char *name, 335 int (*startup)(unsigned int cpu), 336 int (*teardown)(unsigned int cpu)) 337 { 338 return __cpuhp_setup_state_cpuslocked(state, name, false, startup, 339 teardown, false); 340 } 341 342 /** 343 * cpuhp_setup_state_multi - Add callbacks for multi state 344 * @state: The state for which the calls are installed 345 * @name: Name of the callback. 346 * @startup: startup callback function or NULL if not required 347 * @teardown: teardown callback function or NULL if not required 348 * 349 * Sets the internal multi_instance flag and prepares a state to work as a multi 350 * instance callback. No callbacks are invoked at this point. The callbacks are 351 * invoked once an instance for this state are registered via 352 * cpuhp_state_add_instance() or cpuhp_state_add_instance_nocalls() 353 */ cpuhp_setup_state_multi(enum cpuhp_state state,const char * name,int (* startup)(unsigned int cpu,struct hlist_node * node),int (* teardown)(unsigned int cpu,struct hlist_node * node))354 static inline int cpuhp_setup_state_multi(enum cpuhp_state state, 355 const char *name, 356 int (*startup)(unsigned int cpu, 357 struct hlist_node *node), 358 int (*teardown)(unsigned int cpu, 359 struct hlist_node *node)) 360 { 361 return __cpuhp_setup_state(state, name, false, 362 (void *) startup, 363 (void *) teardown, true); 364 } 365 366 int __cpuhp_state_add_instance(enum cpuhp_state state, struct hlist_node *node, 367 bool invoke); 368 int __cpuhp_state_add_instance_cpuslocked(enum cpuhp_state state, 369 struct hlist_node *node, bool invoke); 370 371 /** 372 * cpuhp_state_add_instance - Add an instance for a state and invoke startup 373 * callback. 374 * @state: The state for which the instance is installed 375 * @node: The node for this individual state. 376 * 377 * Installs the instance for the @state and invokes the registered startup 378 * callback on the online cpus which have already reached the @state. The 379 * @state must have been earlier marked as multi-instance by 380 * cpuhp_setup_state_multi(). 381 */ cpuhp_state_add_instance(enum cpuhp_state state,struct hlist_node * node)382 static inline int cpuhp_state_add_instance(enum cpuhp_state state, 383 struct hlist_node *node) 384 { 385 return __cpuhp_state_add_instance(state, node, true); 386 } 387 388 /** 389 * cpuhp_state_add_instance_nocalls - Add an instance for a state without 390 * invoking the startup callback. 391 * @state: The state for which the instance is installed 392 * @node: The node for this individual state. 393 * 394 * Installs the instance for the @state. The @state must have been earlier 395 * marked as multi-instance by cpuhp_setup_state_multi. NOP if SMP=n or 396 * HOTPLUG_CPU=n. 397 */ cpuhp_state_add_instance_nocalls(enum cpuhp_state state,struct hlist_node * node)398 static inline int cpuhp_state_add_instance_nocalls(enum cpuhp_state state, 399 struct hlist_node *node) 400 { 401 return __cpuhp_state_add_instance(state, node, false); 402 } 403 404 /** 405 * cpuhp_state_add_instance_nocalls_cpuslocked - Add an instance for a state 406 * without invoking the startup 407 * callback from a cpus_read_lock() 408 * held region. 409 * @state: The state for which the instance is installed 410 * @node: The node for this individual state. 411 * 412 * Same as cpuhp_state_add_instance_nocalls() except that it must be 413 * invoked from within a cpus_read_lock() held region. 414 */ 415 static inline int cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state,struct hlist_node * node)416 cpuhp_state_add_instance_nocalls_cpuslocked(enum cpuhp_state state, 417 struct hlist_node *node) 418 { 419 return __cpuhp_state_add_instance_cpuslocked(state, node, false); 420 } 421 422 void __cpuhp_remove_state(enum cpuhp_state state, bool invoke); 423 void __cpuhp_remove_state_cpuslocked(enum cpuhp_state state, bool invoke); 424 425 /** 426 * cpuhp_remove_state - Remove hotplug state callbacks and invoke the teardown 427 * @state: The state for which the calls are removed 428 * 429 * Removes the callback functions and invokes the teardown callback on 430 * the online cpus which have already reached the @state. 431 */ cpuhp_remove_state(enum cpuhp_state state)432 static inline void cpuhp_remove_state(enum cpuhp_state state) 433 { 434 __cpuhp_remove_state(state, true); 435 } 436 437 /** 438 * cpuhp_remove_state_nocalls - Remove hotplug state callbacks without invoking 439 * the teardown callback 440 * @state: The state for which the calls are removed 441 */ cpuhp_remove_state_nocalls(enum cpuhp_state state)442 static inline void cpuhp_remove_state_nocalls(enum cpuhp_state state) 443 { 444 __cpuhp_remove_state(state, false); 445 } 446 447 /** 448 * cpuhp_remove_state_nocalls_cpuslocked - Remove hotplug state callbacks without invoking 449 * teardown from a cpus_read_lock() held region. 450 * @state: The state for which the calls are removed 451 * 452 * Same as cpuhp_remove_state nocalls() except that it must be invoked 453 * from within a cpus_read_lock() held region. 454 */ cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state)455 static inline void cpuhp_remove_state_nocalls_cpuslocked(enum cpuhp_state state) 456 { 457 __cpuhp_remove_state_cpuslocked(state, false); 458 } 459 460 /** 461 * cpuhp_remove_multi_state - Remove hotplug multi state callback 462 * @state: The state for which the calls are removed 463 * 464 * Removes the callback functions from a multi state. This is the reverse of 465 * cpuhp_setup_state_multi(). All instances should have been removed before 466 * invoking this function. 467 */ cpuhp_remove_multi_state(enum cpuhp_state state)468 static inline void cpuhp_remove_multi_state(enum cpuhp_state state) 469 { 470 __cpuhp_remove_state(state, false); 471 } 472 473 int __cpuhp_state_remove_instance(enum cpuhp_state state, 474 struct hlist_node *node, bool invoke); 475 476 /** 477 * cpuhp_state_remove_instance - Remove hotplug instance from state and invoke 478 * the teardown callback 479 * @state: The state from which the instance is removed 480 * @node: The node for this individual state. 481 * 482 * Removes the instance and invokes the teardown callback on the online cpus 483 * which have already reached @state. 484 */ cpuhp_state_remove_instance(enum cpuhp_state state,struct hlist_node * node)485 static inline int cpuhp_state_remove_instance(enum cpuhp_state state, 486 struct hlist_node *node) 487 { 488 return __cpuhp_state_remove_instance(state, node, true); 489 } 490 491 /** 492 * cpuhp_state_remove_instance_nocalls - Remove hotplug instance from state 493 * without invoking the teardown callback 494 * @state: The state from which the instance is removed 495 * @node: The node for this individual state. 496 * 497 * Removes the instance without invoking the teardown callback. 498 */ cpuhp_state_remove_instance_nocalls(enum cpuhp_state state,struct hlist_node * node)499 static inline int cpuhp_state_remove_instance_nocalls(enum cpuhp_state state, 500 struct hlist_node *node) 501 { 502 return __cpuhp_state_remove_instance(state, node, false); 503 } 504 505 #ifdef CONFIG_SMP 506 void cpuhp_online_idle(enum cpuhp_state state); 507 #else cpuhp_online_idle(enum cpuhp_state state)508 static inline void cpuhp_online_idle(enum cpuhp_state state) { } 509 #endif 510 511 struct task_struct; 512 513 void cpuhp_ap_sync_alive(void); 514 void arch_cpuhp_sync_state_poll(void); 515 void arch_cpuhp_cleanup_kick_cpu(unsigned int cpu); 516 int arch_cpuhp_kick_ap_alive(unsigned int cpu, struct task_struct *tidle); 517 bool arch_cpuhp_init_parallel_bringup(void); 518 519 #ifdef CONFIG_HOTPLUG_CORE_SYNC_DEAD 520 void cpuhp_ap_report_dead(void); 521 void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu); 522 #else cpuhp_ap_report_dead(void)523 static inline void cpuhp_ap_report_dead(void) { } arch_cpuhp_cleanup_dead_cpu(unsigned int cpu)524 static inline void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu) { } 525 #endif 526 527 #endif 528