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 pm_suspend_target_state; 206 extern suspend_state_t mem_sleep_current; 207 extern suspend_state_t mem_sleep_default; 208 209 /** 210 * suspend_set_ops - set platform dependent suspend operations 211 * @ops: The new suspend operations to set. 212 */ 213 extern void suspend_set_ops(const struct platform_suspend_ops *ops); 214 extern int suspend_valid_only_mem(suspend_state_t state); 215 216 extern unsigned int pm_suspend_global_flags; 217 218 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) 219 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) 220 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) 221 222 static inline void pm_suspend_clear_flags(void) 223 { 224 pm_suspend_global_flags = 0; 225 } 226 227 static inline void pm_set_suspend_via_firmware(void) 228 { 229 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; 230 } 231 232 static inline void pm_set_resume_via_firmware(void) 233 { 234 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; 235 } 236 237 static inline void pm_set_suspend_no_platform(void) 238 { 239 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; 240 } 241 242 /** 243 * pm_suspend_via_firmware - Check if platform firmware will suspend the system. 244 * 245 * To be called during system-wide power management transitions to sleep states 246 * or during the subsequent system-wide transitions back to the working state. 247 * 248 * Return 'true' if the platform firmware is going to be invoked at the end of 249 * the system-wide power management transition (to a sleep state) in progress in 250 * order to complete it, or if the platform firmware has been invoked in order 251 * to complete the last (or preceding) transition of the system to a sleep 252 * state. 253 * 254 * This matters if the caller needs or wants to carry out some special actions 255 * depending on whether or not control will be passed to the platform firmware 256 * subsequently (for example, the device may need to be reset before letting the 257 * platform firmware manipulate it, which is not necessary when the platform 258 * firmware is not going to be invoked) or when such special actions may have 259 * been carried out during the preceding transition of the system to a sleep 260 * state (as they may need to be taken into account). 261 */ 262 static inline bool pm_suspend_via_firmware(void) 263 { 264 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); 265 } 266 267 /** 268 * pm_resume_via_firmware - Check if platform firmware has woken up the system. 269 * 270 * To be called during system-wide power management transitions from sleep 271 * states. 272 * 273 * Return 'true' if the platform firmware has passed control to the kernel at 274 * the beginning of the system-wide power management transition in progress, so 275 * the event that woke up the system from sleep has been handled by the platform 276 * firmware. 277 */ 278 static inline bool pm_resume_via_firmware(void) 279 { 280 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); 281 } 282 283 /** 284 * pm_suspend_no_platform - Check if platform may change device power states. 285 * 286 * To be called during system-wide power management transitions to sleep states 287 * or during the subsequent system-wide transitions back to the working state. 288 * 289 * Return 'true' if the power states of devices remain under full control of the 290 * kernel throughout the system-wide suspend and resume cycle in progress (that 291 * is, if a device is put into a certain power state during suspend, it can be 292 * expected to remain in that state during resume). 293 */ 294 static inline bool pm_suspend_no_platform(void) 295 { 296 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); 297 } 298 299 /* Suspend-to-idle state machnine. */ 300 enum s2idle_states { 301 S2IDLE_STATE_NONE, /* Not suspended/suspending. */ 302 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ 303 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ 304 }; 305 306 extern enum s2idle_states __read_mostly s2idle_state; 307 308 static inline bool idle_should_enter_s2idle(void) 309 { 310 return unlikely(s2idle_state == S2IDLE_STATE_ENTER); 311 } 312 313 extern bool pm_suspend_default_s2idle(void); 314 extern void __init pm_states_init(void); 315 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); 316 extern void s2idle_wake(void); 317 318 /** 319 * arch_suspend_disable_irqs - disable IRQs for suspend 320 * 321 * Disables IRQs (in the default case). This is a weak symbol in the common 322 * code and thus allows architectures to override it if more needs to be 323 * done. Not called for suspend to disk. 324 */ 325 extern void arch_suspend_disable_irqs(void); 326 327 /** 328 * arch_suspend_enable_irqs - enable IRQs after suspend 329 * 330 * Enables IRQs (in the default case). This is a weak symbol in the common 331 * code and thus allows architectures to override it if more needs to be 332 * done. Not called for suspend to disk. 333 */ 334 extern void arch_suspend_enable_irqs(void); 335 336 extern int pm_suspend(suspend_state_t state); 337 extern bool sync_on_suspend_enabled; 338 #else /* !CONFIG_SUSPEND */ 339 #define suspend_valid_only_mem NULL 340 341 #define pm_suspend_target_state (PM_SUSPEND_ON) 342 343 static inline void pm_suspend_clear_flags(void) {} 344 static inline void pm_set_suspend_via_firmware(void) {} 345 static inline void pm_set_resume_via_firmware(void) {} 346 static inline bool pm_suspend_via_firmware(void) { return false; } 347 static inline bool pm_resume_via_firmware(void) { return false; } 348 static inline bool pm_suspend_no_platform(void) { return false; } 349 static inline bool pm_suspend_default_s2idle(void) { return false; } 350 351 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} 352 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } 353 static inline bool sync_on_suspend_enabled(void) { return true; } 354 static inline bool idle_should_enter_s2idle(void) { return false; } 355 static inline void __init pm_states_init(void) {} 356 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} 357 static inline void s2idle_wake(void) {} 358 #endif /* !CONFIG_SUSPEND */ 359 360 /* struct pbe is used for creating lists of pages that should be restored 361 * atomically during the resume from disk, because the page frames they have 362 * occupied before the suspend are in use. 363 */ 364 struct pbe { 365 void *address; /* address of the copy */ 366 void *orig_address; /* original address of a page */ 367 struct pbe *next; 368 }; 369 370 /* mm/page_alloc.c */ 371 extern void mark_free_pages(struct zone *zone); 372 373 /** 374 * struct platform_hibernation_ops - hibernation platform support 375 * 376 * The methods in this structure allow a platform to carry out special 377 * operations required by it during a hibernation transition. 378 * 379 * All the methods below, except for @recover(), must be implemented. 380 * 381 * @begin: Tell the platform driver that we're starting hibernation. 382 * Called right after shrinking memory and before freezing devices. 383 * 384 * @end: Called by the PM core right after resuming devices, to indicate to 385 * the platform that the system has returned to the working state. 386 * 387 * @pre_snapshot: Prepare the platform for creating the hibernation image. 388 * Called right after devices have been frozen and before the nonboot 389 * CPUs are disabled (runs with IRQs on). 390 * 391 * @finish: Restore the previous state of the platform after the hibernation 392 * image has been created *or* put the platform into the normal operation 393 * mode after the hibernation (the same method is executed in both cases). 394 * Called right after the nonboot CPUs have been enabled and before 395 * thawing devices (runs with IRQs on). 396 * 397 * @prepare: Prepare the platform for entering the low power state. 398 * Called right after the hibernation image has been saved and before 399 * devices are prepared for entering the low power state. 400 * 401 * @enter: Put the system into the low power state after the hibernation image 402 * has been saved to disk. 403 * Called after the nonboot CPUs have been disabled and all of the low 404 * level devices have been shut down (runs with IRQs off). 405 * 406 * @leave: Perform the first stage of the cleanup after the system sleep state 407 * indicated by @set_target() has been left. 408 * Called right after the control has been passed from the boot kernel to 409 * the image kernel, before the nonboot CPUs are enabled and before devices 410 * are resumed. Executed with interrupts disabled. 411 * 412 * @pre_restore: Prepare system for the restoration from a hibernation image. 413 * Called right after devices have been frozen and before the nonboot 414 * CPUs are disabled (runs with IRQs on). 415 * 416 * @restore_cleanup: Clean up after a failing image restoration. 417 * Called right after the nonboot CPUs have been enabled and before 418 * thawing devices (runs with IRQs on). 419 * 420 * @recover: Recover the platform from a failure to suspend devices. 421 * Called by the PM core if the suspending of devices during hibernation 422 * fails. This callback is optional and should only be implemented by 423 * platforms which require special recovery actions in that situation. 424 */ 425 struct platform_hibernation_ops { 426 int (*begin)(pm_message_t stage); 427 void (*end)(void); 428 int (*pre_snapshot)(void); 429 void (*finish)(void); 430 int (*prepare)(void); 431 int (*enter)(void); 432 void (*leave)(void); 433 int (*pre_restore)(void); 434 void (*restore_cleanup)(void); 435 void (*recover)(void); 436 }; 437 438 #ifdef CONFIG_HIBERNATION 439 /* kernel/power/snapshot.c */ 440 extern void register_nosave_region(unsigned long b, unsigned long e); 441 extern int swsusp_page_is_forbidden(struct page *); 442 extern void swsusp_set_page_free(struct page *); 443 extern void swsusp_unset_page_free(struct page *); 444 extern unsigned long get_safe_page(gfp_t gfp_mask); 445 extern asmlinkage int swsusp_arch_suspend(void); 446 extern asmlinkage int swsusp_arch_resume(void); 447 448 extern u32 swsusp_hardware_signature; 449 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); 450 extern int hibernate(void); 451 extern bool system_entering_hibernation(void); 452 extern bool hibernation_available(void); 453 asmlinkage int swsusp_save(void); 454 extern struct pbe *restore_pblist; 455 int pfn_is_nosave(unsigned long pfn); 456 457 int hibernate_quiet_exec(int (*func)(void *data), void *data); 458 int hibernate_resume_nonboot_cpu_disable(void); 459 int arch_hibernation_header_save(void *addr, unsigned int max_size); 460 int arch_hibernation_header_restore(void *addr); 461 462 #else /* CONFIG_HIBERNATION */ 463 static inline void register_nosave_region(unsigned long b, unsigned long e) {} 464 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } 465 static inline void swsusp_set_page_free(struct page *p) {} 466 static inline void swsusp_unset_page_free(struct page *p) {} 467 468 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} 469 static inline int hibernate(void) { return -ENOSYS; } 470 static inline bool system_entering_hibernation(void) { return false; } 471 static inline bool hibernation_available(void) { return false; } 472 473 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { 474 return -ENOTSUPP; 475 } 476 #endif /* CONFIG_HIBERNATION */ 477 478 int arch_resume_nosmt(void); 479 480 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV 481 int is_hibernate_resume_dev(dev_t dev); 482 #else 483 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } 484 #endif 485 486 /* Hibernation and suspend events */ 487 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ 488 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ 489 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ 490 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ 491 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 492 #define PM_POST_RESTORE 0x0006 /* Restore failed */ 493 494 extern struct mutex system_transition_mutex; 495 496 #ifdef CONFIG_PM_SLEEP 497 void save_processor_state(void); 498 void restore_processor_state(void); 499 500 /* kernel/power/main.c */ 501 extern int register_pm_notifier(struct notifier_block *nb); 502 extern int unregister_pm_notifier(struct notifier_block *nb); 503 extern void ksys_sync_helper(void); 504 extern void pm_report_hw_sleep_time(u64 t); 505 extern void pm_report_max_hw_sleep(u64 t); 506 507 #define pm_notifier(fn, pri) { \ 508 static struct notifier_block fn##_nb = \ 509 { .notifier_call = fn, .priority = pri }; \ 510 register_pm_notifier(&fn##_nb); \ 511 } 512 513 /* drivers/base/power/wakeup.c */ 514 extern bool events_check_enabled; 515 516 extern bool pm_wakeup_pending(void); 517 extern void pm_system_wakeup(void); 518 extern void pm_system_cancel_wakeup(void); 519 extern void pm_wakeup_clear(unsigned int irq_number); 520 extern void pm_system_irq_wakeup(unsigned int irq_number); 521 extern unsigned int pm_wakeup_irq(void); 522 extern bool pm_get_wakeup_count(unsigned int *count, bool block); 523 extern bool pm_save_wakeup_count(unsigned int count); 524 extern void pm_wakep_autosleep_enabled(bool set); 525 extern void pm_print_active_wakeup_sources(void); 526 527 extern unsigned int lock_system_sleep(void); 528 extern void unlock_system_sleep(unsigned int); 529 530 #else /* !CONFIG_PM_SLEEP */ 531 532 static inline int register_pm_notifier(struct notifier_block *nb) 533 { 534 return 0; 535 } 536 537 static inline int unregister_pm_notifier(struct notifier_block *nb) 538 { 539 return 0; 540 } 541 542 static inline void pm_report_hw_sleep_time(u64 t) {}; 543 static inline void pm_report_max_hw_sleep(u64 t) {}; 544 545 static inline void ksys_sync_helper(void) {} 546 547 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 548 549 static inline bool pm_wakeup_pending(void) { return false; } 550 static inline void pm_system_wakeup(void) {} 551 static inline void pm_wakeup_clear(bool reset) {} 552 static inline void pm_system_irq_wakeup(unsigned int irq_number) {} 553 554 static inline unsigned int lock_system_sleep(void) { return 0; } 555 static inline void unlock_system_sleep(unsigned int flags) {} 556 557 #endif /* !CONFIG_PM_SLEEP */ 558 559 #ifdef CONFIG_PM_SLEEP_DEBUG 560 extern bool pm_print_times_enabled; 561 extern bool pm_debug_messages_on; 562 extern bool pm_debug_messages_should_print(void); 563 static inline int pm_dyn_debug_messages_on(void) 564 { 565 #ifdef CONFIG_DYNAMIC_DEBUG 566 return 1; 567 #else 568 return 0; 569 #endif 570 } 571 #ifndef pr_fmt 572 #define pr_fmt(fmt) "PM: " fmt 573 #endif 574 #define __pm_pr_dbg(fmt, ...) \ 575 do { \ 576 if (pm_debug_messages_should_print()) \ 577 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 578 else if (pm_dyn_debug_messages_on()) \ 579 pr_debug(fmt, ##__VA_ARGS__); \ 580 } while (0) 581 #define __pm_deferred_pr_dbg(fmt, ...) \ 582 do { \ 583 if (pm_debug_messages_should_print()) \ 584 printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 585 } while (0) 586 #else 587 #define pm_print_times_enabled (false) 588 #define pm_debug_messages_on (false) 589 590 #include <linux/printk.h> 591 592 #define __pm_pr_dbg(fmt, ...) \ 593 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 594 #define __pm_deferred_pr_dbg(fmt, ...) \ 595 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 596 #endif 597 598 /** 599 * pm_pr_dbg - print pm sleep debug messages 600 * 601 * If pm_debug_messages_on is enabled and the system is entering/leaving 602 * suspend, print message. 603 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled, 604 * print message only from instances explicitly enabled on dynamic debug's 605 * control. 606 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled, 607 * don't print message. 608 */ 609 #define pm_pr_dbg(fmt, ...) \ 610 __pm_pr_dbg(fmt, ##__VA_ARGS__) 611 612 #define pm_deferred_pr_dbg(fmt, ...) \ 613 __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) 614 615 #ifdef CONFIG_PM_AUTOSLEEP 616 617 /* kernel/power/autosleep.c */ 618 void queue_up_suspend_work(void); 619 620 #else /* !CONFIG_PM_AUTOSLEEP */ 621 622 static inline void queue_up_suspend_work(void) {} 623 624 #endif /* !CONFIG_PM_AUTOSLEEP */ 625 626 #endif /* _LINUX_SUSPEND_H */ 627