1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _LINUX_SUSPEND_H 3 #define _LINUX_SUSPEND_H 4 5 #include <linux/swap.h> 6 #include <linux/notifier.h> 7 #include <linux/init.h> 8 #include <linux/pm.h> 9 #include <linux/mm.h> 10 #include <linux/freezer.h> 11 #include <asm/errno.h> 12 13 #ifdef CONFIG_VT 14 extern void pm_set_vt_switch(int); 15 #else 16 static inline void pm_set_vt_switch(int do_switch) 17 { 18 } 19 #endif 20 21 #ifdef CONFIG_VT_CONSOLE_SLEEP 22 extern void pm_prepare_console(void); 23 extern void pm_restore_console(void); 24 #else 25 static inline void pm_prepare_console(void) 26 { 27 } 28 29 static inline void pm_restore_console(void) 30 { 31 } 32 #endif 33 34 typedef int __bitwise suspend_state_t; 35 36 #define PM_SUSPEND_ON ((__force suspend_state_t) 0) 37 #define PM_SUSPEND_TO_IDLE ((__force suspend_state_t) 1) 38 #define PM_SUSPEND_STANDBY ((__force suspend_state_t) 2) 39 #define PM_SUSPEND_MEM ((__force suspend_state_t) 3) 40 #define PM_SUSPEND_MIN PM_SUSPEND_TO_IDLE 41 #define PM_SUSPEND_MAX ((__force suspend_state_t) 4) 42 43 enum suspend_stat_step { 44 SUSPEND_FREEZE = 1, 45 SUSPEND_PREPARE, 46 SUSPEND_SUSPEND, 47 SUSPEND_SUSPEND_LATE, 48 SUSPEND_SUSPEND_NOIRQ, 49 SUSPEND_RESUME_NOIRQ, 50 SUSPEND_RESUME_EARLY, 51 SUSPEND_RESUME 52 }; 53 54 struct suspend_stats { 55 int success; 56 int fail; 57 int failed_freeze; 58 int failed_prepare; 59 int failed_suspend; 60 int failed_suspend_late; 61 int failed_suspend_noirq; 62 int failed_resume; 63 int failed_resume_early; 64 int failed_resume_noirq; 65 #define REC_FAILED_NUM 2 66 int last_failed_dev; 67 char failed_devs[REC_FAILED_NUM][40]; 68 int last_failed_errno; 69 int errno[REC_FAILED_NUM]; 70 int last_failed_step; 71 u64 last_hw_sleep; 72 u64 total_hw_sleep; 73 u64 max_hw_sleep; 74 enum suspend_stat_step failed_steps[REC_FAILED_NUM]; 75 }; 76 77 extern struct suspend_stats suspend_stats; 78 79 static inline void dpm_save_failed_dev(const char *name) 80 { 81 strscpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev], 82 name, 83 sizeof(suspend_stats.failed_devs[0])); 84 suspend_stats.last_failed_dev++; 85 suspend_stats.last_failed_dev %= REC_FAILED_NUM; 86 } 87 88 static inline void dpm_save_failed_errno(int err) 89 { 90 suspend_stats.errno[suspend_stats.last_failed_errno] = err; 91 suspend_stats.last_failed_errno++; 92 suspend_stats.last_failed_errno %= REC_FAILED_NUM; 93 } 94 95 static inline void dpm_save_failed_step(enum suspend_stat_step step) 96 { 97 suspend_stats.failed_steps[suspend_stats.last_failed_step] = step; 98 suspend_stats.last_failed_step++; 99 suspend_stats.last_failed_step %= REC_FAILED_NUM; 100 } 101 102 /** 103 * struct platform_suspend_ops - Callbacks for managing platform dependent 104 * system sleep states. 105 * 106 * @valid: Callback to determine if given system sleep state is supported by 107 * the platform. 108 * Valid (ie. supported) states are advertised in /sys/power/state. Note 109 * that it still may be impossible to enter given system sleep state if the 110 * conditions aren't right. 111 * There is the %suspend_valid_only_mem function available that can be 112 * assigned to this if the platform only supports mem sleep. 113 * 114 * @begin: Initialise a transition to given system sleep state. 115 * @begin() is executed right prior to suspending devices. The information 116 * conveyed to the platform code by @begin() should be disregarded by it as 117 * soon as @end() is executed. If @begin() fails (ie. returns nonzero), 118 * @prepare(), @enter() and @finish() will not be called by the PM core. 119 * This callback is optional. However, if it is implemented, the argument 120 * passed to @enter() is redundant and should be ignored. 121 * 122 * @prepare: Prepare the platform for entering the system sleep state indicated 123 * by @begin(). 124 * @prepare() is called right after devices have been suspended (ie. the 125 * appropriate .suspend() method has been executed for each device) and 126 * before device drivers' late suspend callbacks are executed. It returns 127 * 0 on success or a negative error code otherwise, in which case the 128 * system cannot enter the desired sleep state (@prepare_late(), @enter(), 129 * and @wake() will not be called in that case). 130 * 131 * @prepare_late: Finish preparing the platform for entering the system sleep 132 * state indicated by @begin(). 133 * @prepare_late is called before disabling nonboot CPUs and after 134 * device drivers' late suspend callbacks have been executed. It returns 135 * 0 on success or a negative error code otherwise, in which case the 136 * system cannot enter the desired sleep state (@enter() will not be 137 * executed). 138 * 139 * @enter: Enter the system sleep state indicated by @begin() or represented by 140 * the argument if @begin() is not implemented. 141 * This callback is mandatory. It returns 0 on success or a negative 142 * error code otherwise, in which case the system cannot enter the desired 143 * sleep state. 144 * 145 * @wake: Called when the system has just left a sleep state, right after 146 * the nonboot CPUs have been enabled and before device drivers' early 147 * resume callbacks are executed. 148 * This callback is optional, but should be implemented by the platforms 149 * that implement @prepare_late(). If implemented, it is always called 150 * after @prepare_late and @enter(), even if one of them fails. 151 * 152 * @finish: Finish wake-up of the platform. 153 * @finish is called right prior to calling device drivers' regular suspend 154 * callbacks. 155 * This callback is optional, but should be implemented by the platforms 156 * that implement @prepare(). If implemented, it is always called after 157 * @enter() and @wake(), even if any of them fails. It is executed after 158 * a failing @prepare. 159 * 160 * @suspend_again: Returns whether the system should suspend again (true) or 161 * not (false). If the platform wants to poll sensors or execute some 162 * code during suspended without invoking userspace and most of devices, 163 * suspend_again callback is the place assuming that periodic-wakeup or 164 * alarm-wakeup is already setup. This allows to execute some codes while 165 * being kept suspended in the view of userland and devices. 166 * 167 * @end: Called by the PM core right after resuming devices, to indicate to 168 * the platform that the system has returned to the working state or 169 * the transition to the sleep state has been aborted. 170 * This callback is optional, but should be implemented by the platforms 171 * that implement @begin(). Accordingly, platforms implementing @begin() 172 * should also provide a @end() which cleans up transitions aborted before 173 * @enter(). 174 * 175 * @recover: Recover the platform from a suspend failure. 176 * Called by the PM core if the suspending of devices fails. 177 * This callback is optional and should only be implemented by platforms 178 * which require special recovery actions in that situation. 179 */ 180 struct platform_suspend_ops { 181 int (*valid)(suspend_state_t state); 182 int (*begin)(suspend_state_t state); 183 int (*prepare)(void); 184 int (*prepare_late)(void); 185 int (*enter)(suspend_state_t state); 186 void (*wake)(void); 187 void (*finish)(void); 188 bool (*suspend_again)(void); 189 void (*end)(void); 190 void (*recover)(void); 191 }; 192 193 struct platform_s2idle_ops { 194 int (*begin)(void); 195 int (*prepare)(void); 196 int (*prepare_late)(void); 197 void (*check)(void); 198 bool (*wake)(void); 199 void (*restore_early)(void); 200 void (*restore)(void); 201 void (*end)(void); 202 }; 203 204 #ifdef CONFIG_SUSPEND 205 extern suspend_state_t mem_sleep_current; 206 extern suspend_state_t mem_sleep_default; 207 208 /** 209 * suspend_set_ops - set platform dependent suspend operations 210 * @ops: The new suspend operations to set. 211 */ 212 extern void suspend_set_ops(const struct platform_suspend_ops *ops); 213 extern int suspend_valid_only_mem(suspend_state_t state); 214 215 extern unsigned int pm_suspend_global_flags; 216 217 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) 218 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) 219 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) 220 221 static inline void pm_suspend_clear_flags(void) 222 { 223 pm_suspend_global_flags = 0; 224 } 225 226 static inline void pm_set_suspend_via_firmware(void) 227 { 228 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; 229 } 230 231 static inline void pm_set_resume_via_firmware(void) 232 { 233 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; 234 } 235 236 static inline void pm_set_suspend_no_platform(void) 237 { 238 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; 239 } 240 241 /** 242 * pm_suspend_via_firmware - Check if platform firmware will suspend the system. 243 * 244 * To be called during system-wide power management transitions to sleep states 245 * or during the subsequent system-wide transitions back to the working state. 246 * 247 * Return 'true' if the platform firmware is going to be invoked at the end of 248 * the system-wide power management transition (to a sleep state) in progress in 249 * order to complete it, or if the platform firmware has been invoked in order 250 * to complete the last (or preceding) transition of the system to a sleep 251 * state. 252 * 253 * This matters if the caller needs or wants to carry out some special actions 254 * depending on whether or not control will be passed to the platform firmware 255 * subsequently (for example, the device may need to be reset before letting the 256 * platform firmware manipulate it, which is not necessary when the platform 257 * firmware is not going to be invoked) or when such special actions may have 258 * been carried out during the preceding transition of the system to a sleep 259 * state (as they may need to be taken into account). 260 */ 261 static inline bool pm_suspend_via_firmware(void) 262 { 263 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); 264 } 265 266 /** 267 * pm_resume_via_firmware - Check if platform firmware has woken up the system. 268 * 269 * To be called during system-wide power management transitions from sleep 270 * states. 271 * 272 * Return 'true' if the platform firmware has passed control to the kernel at 273 * the beginning of the system-wide power management transition in progress, so 274 * the event that woke up the system from sleep has been handled by the platform 275 * firmware. 276 */ 277 static inline bool pm_resume_via_firmware(void) 278 { 279 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); 280 } 281 282 /** 283 * pm_suspend_no_platform - Check if platform may change device power states. 284 * 285 * To be called during system-wide power management transitions to sleep states 286 * or during the subsequent system-wide transitions back to the working state. 287 * 288 * Return 'true' if the power states of devices remain under full control of the 289 * kernel throughout the system-wide suspend and resume cycle in progress (that 290 * is, if a device is put into a certain power state during suspend, it can be 291 * expected to remain in that state during resume). 292 */ 293 static inline bool pm_suspend_no_platform(void) 294 { 295 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); 296 } 297 298 /* Suspend-to-idle state machnine. */ 299 enum s2idle_states { 300 S2IDLE_STATE_NONE, /* Not suspended/suspending. */ 301 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ 302 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ 303 }; 304 305 extern enum s2idle_states __read_mostly s2idle_state; 306 307 static inline bool idle_should_enter_s2idle(void) 308 { 309 return unlikely(s2idle_state == S2IDLE_STATE_ENTER); 310 } 311 312 extern bool pm_suspend_default_s2idle(void); 313 extern void __init pm_states_init(void); 314 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); 315 extern void s2idle_wake(void); 316 317 /** 318 * arch_suspend_disable_irqs - disable IRQs for suspend 319 * 320 * Disables IRQs (in the default case). This is a weak symbol in the common 321 * code and thus allows architectures to override it if more needs to be 322 * done. Not called for suspend to disk. 323 */ 324 extern void arch_suspend_disable_irqs(void); 325 326 /** 327 * arch_suspend_enable_irqs - enable IRQs after suspend 328 * 329 * Enables IRQs (in the default case). This is a weak symbol in the common 330 * code and thus allows architectures to override it if more needs to be 331 * done. Not called for suspend to disk. 332 */ 333 extern void arch_suspend_enable_irqs(void); 334 335 extern int pm_suspend(suspend_state_t state); 336 extern bool sync_on_suspend_enabled; 337 #else /* !CONFIG_SUSPEND */ 338 #define suspend_valid_only_mem NULL 339 340 static inline void pm_suspend_clear_flags(void) {} 341 static inline void pm_set_suspend_via_firmware(void) {} 342 static inline void pm_set_resume_via_firmware(void) {} 343 static inline bool pm_suspend_via_firmware(void) { return false; } 344 static inline bool pm_resume_via_firmware(void) { return false; } 345 static inline bool pm_suspend_no_platform(void) { return false; } 346 static inline bool pm_suspend_default_s2idle(void) { return false; } 347 348 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} 349 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } 350 static inline bool sync_on_suspend_enabled(void) { return true; } 351 static inline bool idle_should_enter_s2idle(void) { return false; } 352 static inline void __init pm_states_init(void) {} 353 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} 354 static inline void s2idle_wake(void) {} 355 #endif /* !CONFIG_SUSPEND */ 356 357 /* struct pbe is used for creating lists of pages that should be restored 358 * atomically during the resume from disk, because the page frames they have 359 * occupied before the suspend are in use. 360 */ 361 struct pbe { 362 void *address; /* address of the copy */ 363 void *orig_address; /* original address of a page */ 364 struct pbe *next; 365 }; 366 367 /** 368 * struct platform_hibernation_ops - hibernation platform support 369 * 370 * The methods in this structure allow a platform to carry out special 371 * operations required by it during a hibernation transition. 372 * 373 * All the methods below, except for @recover(), must be implemented. 374 * 375 * @begin: Tell the platform driver that we're starting hibernation. 376 * Called right after shrinking memory and before freezing devices. 377 * 378 * @end: Called by the PM core right after resuming devices, to indicate to 379 * the platform that the system has returned to the working state. 380 * 381 * @pre_snapshot: Prepare the platform for creating the hibernation image. 382 * Called right after devices have been frozen and before the nonboot 383 * CPUs are disabled (runs with IRQs on). 384 * 385 * @finish: Restore the previous state of the platform after the hibernation 386 * image has been created *or* put the platform into the normal operation 387 * mode after the hibernation (the same method is executed in both cases). 388 * Called right after the nonboot CPUs have been enabled and before 389 * thawing devices (runs with IRQs on). 390 * 391 * @prepare: Prepare the platform for entering the low power state. 392 * Called right after the hibernation image has been saved and before 393 * devices are prepared for entering the low power state. 394 * 395 * @enter: Put the system into the low power state after the hibernation image 396 * has been saved to disk. 397 * Called after the nonboot CPUs have been disabled and all of the low 398 * level devices have been shut down (runs with IRQs off). 399 * 400 * @leave: Perform the first stage of the cleanup after the system sleep state 401 * indicated by @set_target() has been left. 402 * Called right after the control has been passed from the boot kernel to 403 * the image kernel, before the nonboot CPUs are enabled and before devices 404 * are resumed. Executed with interrupts disabled. 405 * 406 * @pre_restore: Prepare system for the restoration from a hibernation image. 407 * Called right after devices have been frozen and before the nonboot 408 * CPUs are disabled (runs with IRQs on). 409 * 410 * @restore_cleanup: Clean up after a failing image restoration. 411 * Called right after the nonboot CPUs have been enabled and before 412 * thawing devices (runs with IRQs on). 413 * 414 * @recover: Recover the platform from a failure to suspend devices. 415 * Called by the PM core if the suspending of devices during hibernation 416 * fails. This callback is optional and should only be implemented by 417 * platforms which require special recovery actions in that situation. 418 */ 419 struct platform_hibernation_ops { 420 int (*begin)(pm_message_t stage); 421 void (*end)(void); 422 int (*pre_snapshot)(void); 423 void (*finish)(void); 424 int (*prepare)(void); 425 int (*enter)(void); 426 void (*leave)(void); 427 int (*pre_restore)(void); 428 void (*restore_cleanup)(void); 429 void (*recover)(void); 430 }; 431 432 #ifdef CONFIG_HIBERNATION 433 /* kernel/power/snapshot.c */ 434 extern void register_nosave_region(unsigned long b, unsigned long e); 435 extern int swsusp_page_is_forbidden(struct page *); 436 extern void swsusp_set_page_free(struct page *); 437 extern void swsusp_unset_page_free(struct page *); 438 extern unsigned long get_safe_page(gfp_t gfp_mask); 439 extern asmlinkage int swsusp_arch_suspend(void); 440 extern asmlinkage int swsusp_arch_resume(void); 441 442 extern u32 swsusp_hardware_signature; 443 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); 444 extern int hibernate(void); 445 extern bool system_entering_hibernation(void); 446 extern bool hibernation_available(void); 447 asmlinkage int swsusp_save(void); 448 extern struct pbe *restore_pblist; 449 int pfn_is_nosave(unsigned long pfn); 450 451 int hibernate_quiet_exec(int (*func)(void *data), void *data); 452 #else /* CONFIG_HIBERNATION */ 453 static inline void register_nosave_region(unsigned long b, unsigned long e) {} 454 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } 455 static inline void swsusp_set_page_free(struct page *p) {} 456 static inline void swsusp_unset_page_free(struct page *p) {} 457 458 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} 459 static inline int hibernate(void) { return -ENOSYS; } 460 static inline bool system_entering_hibernation(void) { return false; } 461 static inline bool hibernation_available(void) { return false; } 462 463 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { 464 return -ENOTSUPP; 465 } 466 #endif /* CONFIG_HIBERNATION */ 467 468 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV 469 int is_hibernate_resume_dev(dev_t dev); 470 #else 471 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } 472 #endif 473 474 /* Hibernation and suspend events */ 475 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ 476 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ 477 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ 478 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ 479 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 480 #define PM_POST_RESTORE 0x0006 /* Restore failed */ 481 482 extern struct mutex system_transition_mutex; 483 484 #ifdef CONFIG_PM_SLEEP 485 void save_processor_state(void); 486 void restore_processor_state(void); 487 488 /* kernel/power/main.c */ 489 extern int register_pm_notifier(struct notifier_block *nb); 490 extern int unregister_pm_notifier(struct notifier_block *nb); 491 extern void ksys_sync_helper(void); 492 extern void pm_report_hw_sleep_time(u64 t); 493 extern void pm_report_max_hw_sleep(u64 t); 494 495 #define pm_notifier(fn, pri) { \ 496 static struct notifier_block fn##_nb = \ 497 { .notifier_call = fn, .priority = pri }; \ 498 register_pm_notifier(&fn##_nb); \ 499 } 500 501 /* drivers/base/power/wakeup.c */ 502 extern bool events_check_enabled; 503 extern suspend_state_t pm_suspend_target_state; 504 505 static inline bool pm_suspended_storage(void) 506 { 507 return !gfp_has_io_fs(gfp_allowed_mask); 508 } 509 510 extern bool pm_wakeup_pending(void); 511 extern void pm_system_wakeup(void); 512 extern void pm_system_cancel_wakeup(void); 513 extern void pm_wakeup_clear(unsigned int irq_number); 514 extern void pm_system_irq_wakeup(unsigned int irq_number); 515 extern unsigned int pm_wakeup_irq(void); 516 extern bool pm_get_wakeup_count(unsigned int *count, bool block); 517 extern bool pm_save_wakeup_count(unsigned int count); 518 extern void pm_wakep_autosleep_enabled(bool set); 519 extern void pm_print_active_wakeup_sources(void); 520 521 extern unsigned int lock_system_sleep(void); 522 extern void unlock_system_sleep(unsigned int); 523 524 #else /* !CONFIG_PM_SLEEP */ 525 526 static inline int register_pm_notifier(struct notifier_block *nb) 527 { 528 return 0; 529 } 530 531 static inline int unregister_pm_notifier(struct notifier_block *nb) 532 { 533 return 0; 534 } 535 536 static inline void pm_report_hw_sleep_time(u64 t) {}; 537 static inline void pm_report_max_hw_sleep(u64 t) {}; 538 539 static inline void ksys_sync_helper(void) {} 540 541 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 542 543 static inline bool pm_suspended_storage(void) { return false; } 544 static inline bool pm_wakeup_pending(void) { return false; } 545 static inline void pm_system_wakeup(void) {} 546 static inline void pm_wakeup_clear(bool reset) {} 547 static inline void pm_system_irq_wakeup(unsigned int irq_number) {} 548 549 static inline unsigned int lock_system_sleep(void) { return 0; } 550 static inline void unlock_system_sleep(unsigned int flags) {} 551 552 #endif /* !CONFIG_PM_SLEEP */ 553 554 #ifdef CONFIG_PM_SLEEP_DEBUG 555 extern bool pm_print_times_enabled; 556 extern bool pm_debug_messages_on; 557 static inline int pm_dyn_debug_messages_on(void) 558 { 559 #ifdef CONFIG_DYNAMIC_DEBUG 560 return 1; 561 #else 562 return 0; 563 #endif 564 } 565 #ifndef pr_fmt 566 #define pr_fmt(fmt) "PM: " fmt 567 #endif 568 #define __pm_pr_dbg(fmt, ...) \ 569 do { \ 570 if (pm_debug_messages_on) \ 571 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 572 else if (pm_dyn_debug_messages_on()) \ 573 pr_debug(fmt, ##__VA_ARGS__); \ 574 } while (0) 575 #define __pm_deferred_pr_dbg(fmt, ...) \ 576 do { \ 577 if (pm_debug_messages_on) \ 578 printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 579 } while (0) 580 #else 581 #define pm_print_times_enabled (false) 582 #define pm_debug_messages_on (false) 583 584 #include <linux/printk.h> 585 586 #define __pm_pr_dbg(fmt, ...) \ 587 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 588 #define __pm_deferred_pr_dbg(fmt, ...) \ 589 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 590 #endif 591 592 /** 593 * pm_pr_dbg - print pm sleep debug messages 594 * 595 * If pm_debug_messages_on is enabled, print message. 596 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled, 597 * print message only from instances explicitly enabled on dynamic debug's 598 * control. 599 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled, 600 * don't print message. 601 */ 602 #define pm_pr_dbg(fmt, ...) \ 603 __pm_pr_dbg(fmt, ##__VA_ARGS__) 604 605 #define pm_deferred_pr_dbg(fmt, ...) \ 606 __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) 607 608 #ifdef CONFIG_PM_AUTOSLEEP 609 610 /* kernel/power/autosleep.c */ 611 void queue_up_suspend_work(void); 612 613 #else /* !CONFIG_PM_AUTOSLEEP */ 614 615 static inline void queue_up_suspend_work(void) {} 616 617 #endif /* !CONFIG_PM_AUTOSLEEP */ 618 619 #endif /* _LINUX_SUSPEND_H */ 620