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_WORKING = 0, 45 SUSPEND_FREEZE, 46 SUSPEND_PREPARE, 47 SUSPEND_SUSPEND, 48 SUSPEND_SUSPEND_LATE, 49 SUSPEND_SUSPEND_NOIRQ, 50 SUSPEND_RESUME_NOIRQ, 51 SUSPEND_RESUME_EARLY, 52 SUSPEND_RESUME 53 }; 54 55 struct suspend_stats { 56 int success; 57 int fail; 58 int failed_freeze; 59 int failed_prepare; 60 int failed_suspend; 61 int failed_suspend_late; 62 int failed_suspend_noirq; 63 int failed_resume; 64 int failed_resume_early; 65 int failed_resume_noirq; 66 #define REC_FAILED_NUM 2 67 int last_failed_dev; 68 char failed_devs[REC_FAILED_NUM][40]; 69 int last_failed_errno; 70 int errno[REC_FAILED_NUM]; 71 int last_failed_step; 72 u64 last_hw_sleep; 73 u64 total_hw_sleep; 74 u64 max_hw_sleep; 75 enum suspend_stat_step failed_steps[REC_FAILED_NUM]; 76 }; 77 78 extern struct suspend_stats suspend_stats; 79 80 static inline void dpm_save_failed_dev(const char *name) 81 { 82 strscpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev], 83 name, 84 sizeof(suspend_stats.failed_devs[0])); 85 suspend_stats.last_failed_dev++; 86 suspend_stats.last_failed_dev %= REC_FAILED_NUM; 87 } 88 89 static inline void dpm_save_failed_errno(int err) 90 { 91 suspend_stats.errno[suspend_stats.last_failed_errno] = err; 92 suspend_stats.last_failed_errno++; 93 suspend_stats.last_failed_errno %= REC_FAILED_NUM; 94 } 95 96 static inline void dpm_save_failed_step(enum suspend_stat_step step) 97 { 98 suspend_stats.failed_steps[suspend_stats.last_failed_step] = step; 99 suspend_stats.last_failed_step++; 100 suspend_stats.last_failed_step %= REC_FAILED_NUM; 101 } 102 103 /** 104 * struct platform_suspend_ops - Callbacks for managing platform dependent 105 * system sleep states. 106 * 107 * @valid: Callback to determine if given system sleep state is supported by 108 * the platform. 109 * Valid (ie. supported) states are advertised in /sys/power/state. Note 110 * that it still may be impossible to enter given system sleep state if the 111 * conditions aren't right. 112 * There is the %suspend_valid_only_mem function available that can be 113 * assigned to this if the platform only supports mem sleep. 114 * 115 * @begin: Initialise a transition to given system sleep state. 116 * @begin() is executed right prior to suspending devices. The information 117 * conveyed to the platform code by @begin() should be disregarded by it as 118 * soon as @end() is executed. If @begin() fails (ie. returns nonzero), 119 * @prepare(), @enter() and @finish() will not be called by the PM core. 120 * This callback is optional. However, if it is implemented, the argument 121 * passed to @enter() is redundant and should be ignored. 122 * 123 * @prepare: Prepare the platform for entering the system sleep state indicated 124 * by @begin(). 125 * @prepare() is called right after devices have been suspended (ie. the 126 * appropriate .suspend() method has been executed for each device) and 127 * before device drivers' late suspend callbacks are executed. It returns 128 * 0 on success or a negative error code otherwise, in which case the 129 * system cannot enter the desired sleep state (@prepare_late(), @enter(), 130 * and @wake() will not be called in that case). 131 * 132 * @prepare_late: Finish preparing the platform for entering the system sleep 133 * state indicated by @begin(). 134 * @prepare_late is called before disabling nonboot CPUs and after 135 * device drivers' late suspend callbacks have been executed. It returns 136 * 0 on success or a negative error code otherwise, in which case the 137 * system cannot enter the desired sleep state (@enter() will not be 138 * executed). 139 * 140 * @enter: Enter the system sleep state indicated by @begin() or represented by 141 * the argument if @begin() is not implemented. 142 * This callback is mandatory. It returns 0 on success or a negative 143 * error code otherwise, in which case the system cannot enter the desired 144 * sleep state. 145 * 146 * @wake: Called when the system has just left a sleep state, right after 147 * the nonboot CPUs have been enabled and before device drivers' early 148 * resume callbacks are executed. 149 * This callback is optional, but should be implemented by the platforms 150 * that implement @prepare_late(). If implemented, it is always called 151 * after @prepare_late and @enter(), even if one of them fails. 152 * 153 * @finish: Finish wake-up of the platform. 154 * @finish is called right prior to calling device drivers' regular suspend 155 * callbacks. 156 * This callback is optional, but should be implemented by the platforms 157 * that implement @prepare(). If implemented, it is always called after 158 * @enter() and @wake(), even if any of them fails. It is executed after 159 * a failing @prepare. 160 * 161 * @suspend_again: Returns whether the system should suspend again (true) or 162 * not (false). If the platform wants to poll sensors or execute some 163 * code during suspended without invoking userspace and most of devices, 164 * suspend_again callback is the place assuming that periodic-wakeup or 165 * alarm-wakeup is already setup. This allows to execute some codes while 166 * being kept suspended in the view of userland and devices. 167 * 168 * @end: Called by the PM core right after resuming devices, to indicate to 169 * the platform that the system has returned to the working state or 170 * the transition to the sleep state has been aborted. 171 * This callback is optional, but should be implemented by the platforms 172 * that implement @begin(). Accordingly, platforms implementing @begin() 173 * should also provide a @end() which cleans up transitions aborted before 174 * @enter(). 175 * 176 * @recover: Recover the platform from a suspend failure. 177 * Called by the PM core if the suspending of devices fails. 178 * This callback is optional and should only be implemented by platforms 179 * which require special recovery actions in that situation. 180 */ 181 struct platform_suspend_ops { 182 int (*valid)(suspend_state_t state); 183 int (*begin)(suspend_state_t state); 184 int (*prepare)(void); 185 int (*prepare_late)(void); 186 int (*enter)(suspend_state_t state); 187 void (*wake)(void); 188 void (*finish)(void); 189 bool (*suspend_again)(void); 190 void (*end)(void); 191 void (*recover)(void); 192 }; 193 194 struct platform_s2idle_ops { 195 int (*begin)(void); 196 int (*prepare)(void); 197 int (*prepare_late)(void); 198 void (*check)(void); 199 bool (*wake)(void); 200 void (*restore_early)(void); 201 void (*restore)(void); 202 void (*end)(void); 203 }; 204 205 #ifdef CONFIG_SUSPEND 206 extern suspend_state_t pm_suspend_target_state; 207 extern suspend_state_t mem_sleep_current; 208 extern suspend_state_t mem_sleep_default; 209 210 /** 211 * suspend_set_ops - set platform dependent suspend operations 212 * @ops: The new suspend operations to set. 213 */ 214 extern void suspend_set_ops(const struct platform_suspend_ops *ops); 215 extern int suspend_valid_only_mem(suspend_state_t state); 216 217 extern unsigned int pm_suspend_global_flags; 218 219 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) 220 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) 221 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) 222 223 static inline void pm_suspend_clear_flags(void) 224 { 225 pm_suspend_global_flags = 0; 226 } 227 228 static inline void pm_set_suspend_via_firmware(void) 229 { 230 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; 231 } 232 233 static inline void pm_set_resume_via_firmware(void) 234 { 235 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; 236 } 237 238 static inline void pm_set_suspend_no_platform(void) 239 { 240 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; 241 } 242 243 /** 244 * pm_suspend_via_firmware - Check if platform firmware will suspend the system. 245 * 246 * To be called during system-wide power management transitions to sleep states 247 * or during the subsequent system-wide transitions back to the working state. 248 * 249 * Return 'true' if the platform firmware is going to be invoked at the end of 250 * the system-wide power management transition (to a sleep state) in progress in 251 * order to complete it, or if the platform firmware has been invoked in order 252 * to complete the last (or preceding) transition of the system to a sleep 253 * state. 254 * 255 * This matters if the caller needs or wants to carry out some special actions 256 * depending on whether or not control will be passed to the platform firmware 257 * subsequently (for example, the device may need to be reset before letting the 258 * platform firmware manipulate it, which is not necessary when the platform 259 * firmware is not going to be invoked) or when such special actions may have 260 * been carried out during the preceding transition of the system to a sleep 261 * state (as they may need to be taken into account). 262 */ 263 static inline bool pm_suspend_via_firmware(void) 264 { 265 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); 266 } 267 268 /** 269 * pm_resume_via_firmware - Check if platform firmware has woken up the system. 270 * 271 * To be called during system-wide power management transitions from sleep 272 * states. 273 * 274 * Return 'true' if the platform firmware has passed control to the kernel at 275 * the beginning of the system-wide power management transition in progress, so 276 * the event that woke up the system from sleep has been handled by the platform 277 * firmware. 278 */ 279 static inline bool pm_resume_via_firmware(void) 280 { 281 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); 282 } 283 284 /** 285 * pm_suspend_no_platform - Check if platform may change device power states. 286 * 287 * To be called during system-wide power management transitions to sleep states 288 * or during the subsequent system-wide transitions back to the working state. 289 * 290 * Return 'true' if the power states of devices remain under full control of the 291 * kernel throughout the system-wide suspend and resume cycle in progress (that 292 * is, if a device is put into a certain power state during suspend, it can be 293 * expected to remain in that state during resume). 294 */ 295 static inline bool pm_suspend_no_platform(void) 296 { 297 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); 298 } 299 300 /* Suspend-to-idle state machnine. */ 301 enum s2idle_states { 302 S2IDLE_STATE_NONE, /* Not suspended/suspending. */ 303 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ 304 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ 305 }; 306 307 extern enum s2idle_states __read_mostly s2idle_state; 308 309 static inline bool idle_should_enter_s2idle(void) 310 { 311 return unlikely(s2idle_state == S2IDLE_STATE_ENTER); 312 } 313 314 extern bool pm_suspend_default_s2idle(void); 315 extern void __init pm_states_init(void); 316 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); 317 extern void s2idle_wake(void); 318 319 /** 320 * arch_suspend_disable_irqs - disable IRQs for suspend 321 * 322 * Disables IRQs (in the default case). This is a weak symbol in the common 323 * code and thus allows architectures to override it if more needs to be 324 * done. Not called for suspend to disk. 325 */ 326 extern void arch_suspend_disable_irqs(void); 327 328 /** 329 * arch_suspend_enable_irqs - enable IRQs after suspend 330 * 331 * Enables IRQs (in the default case). This is a weak symbol in the common 332 * code and thus allows architectures to override it if more needs to be 333 * done. Not called for suspend to disk. 334 */ 335 extern void arch_suspend_enable_irqs(void); 336 337 extern int pm_suspend(suspend_state_t state); 338 extern bool sync_on_suspend_enabled; 339 #else /* !CONFIG_SUSPEND */ 340 #define suspend_valid_only_mem NULL 341 342 #define pm_suspend_target_state (PM_SUSPEND_ON) 343 344 static inline void pm_suspend_clear_flags(void) {} 345 static inline void pm_set_suspend_via_firmware(void) {} 346 static inline void pm_set_resume_via_firmware(void) {} 347 static inline bool pm_suspend_via_firmware(void) { return false; } 348 static inline bool pm_resume_via_firmware(void) { return false; } 349 static inline bool pm_suspend_no_platform(void) { return false; } 350 static inline bool pm_suspend_default_s2idle(void) { return false; } 351 352 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {} 353 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } 354 static inline bool sync_on_suspend_enabled(void) { return true; } 355 static inline bool idle_should_enter_s2idle(void) { return false; } 356 static inline void __init pm_states_init(void) {} 357 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {} 358 static inline void s2idle_wake(void) {} 359 #endif /* !CONFIG_SUSPEND */ 360 361 /* struct pbe is used for creating lists of pages that should be restored 362 * atomically during the resume from disk, because the page frames they have 363 * occupied before the suspend are in use. 364 */ 365 struct pbe { 366 void *address; /* address of the copy */ 367 void *orig_address; /* original address of a page */ 368 struct pbe *next; 369 }; 370 371 /** 372 * struct platform_hibernation_ops - hibernation platform support 373 * 374 * The methods in this structure allow a platform to carry out special 375 * operations required by it during a hibernation transition. 376 * 377 * All the methods below, except for @recover(), must be implemented. 378 * 379 * @begin: Tell the platform driver that we're starting hibernation. 380 * Called right after shrinking memory and before freezing devices. 381 * 382 * @end: Called by the PM core right after resuming devices, to indicate to 383 * the platform that the system has returned to the working state. 384 * 385 * @pre_snapshot: Prepare the platform for creating the hibernation image. 386 * Called right after devices have been frozen and before the nonboot 387 * CPUs are disabled (runs with IRQs on). 388 * 389 * @finish: Restore the previous state of the platform after the hibernation 390 * image has been created *or* put the platform into the normal operation 391 * mode after the hibernation (the same method is executed in both cases). 392 * Called right after the nonboot CPUs have been enabled and before 393 * thawing devices (runs with IRQs on). 394 * 395 * @prepare: Prepare the platform for entering the low power state. 396 * Called right after the hibernation image has been saved and before 397 * devices are prepared for entering the low power state. 398 * 399 * @enter: Put the system into the low power state after the hibernation image 400 * has been saved to disk. 401 * Called after the nonboot CPUs have been disabled and all of the low 402 * level devices have been shut down (runs with IRQs off). 403 * 404 * @leave: Perform the first stage of the cleanup after the system sleep state 405 * indicated by @set_target() has been left. 406 * Called right after the control has been passed from the boot kernel to 407 * the image kernel, before the nonboot CPUs are enabled and before devices 408 * are resumed. Executed with interrupts disabled. 409 * 410 * @pre_restore: Prepare system for the restoration from a hibernation image. 411 * Called right after devices have been frozen and before the nonboot 412 * CPUs are disabled (runs with IRQs on). 413 * 414 * @restore_cleanup: Clean up after a failing image restoration. 415 * Called right after the nonboot CPUs have been enabled and before 416 * thawing devices (runs with IRQs on). 417 * 418 * @recover: Recover the platform from a failure to suspend devices. 419 * Called by the PM core if the suspending of devices during hibernation 420 * fails. This callback is optional and should only be implemented by 421 * platforms which require special recovery actions in that situation. 422 */ 423 struct platform_hibernation_ops { 424 int (*begin)(pm_message_t stage); 425 void (*end)(void); 426 int (*pre_snapshot)(void); 427 void (*finish)(void); 428 int (*prepare)(void); 429 int (*enter)(void); 430 void (*leave)(void); 431 int (*pre_restore)(void); 432 void (*restore_cleanup)(void); 433 void (*recover)(void); 434 }; 435 436 #ifdef CONFIG_HIBERNATION 437 /* kernel/power/snapshot.c */ 438 extern void register_nosave_region(unsigned long b, unsigned long e); 439 extern int swsusp_page_is_forbidden(struct page *); 440 extern void swsusp_set_page_free(struct page *); 441 extern void swsusp_unset_page_free(struct page *); 442 extern unsigned long get_safe_page(gfp_t gfp_mask); 443 extern asmlinkage int swsusp_arch_suspend(void); 444 extern asmlinkage int swsusp_arch_resume(void); 445 446 extern u32 swsusp_hardware_signature; 447 extern void hibernation_set_ops(const struct platform_hibernation_ops *ops); 448 extern int hibernate(void); 449 extern bool system_entering_hibernation(void); 450 extern bool hibernation_available(void); 451 asmlinkage int swsusp_save(void); 452 extern struct pbe *restore_pblist; 453 int pfn_is_nosave(unsigned long pfn); 454 455 int hibernate_quiet_exec(int (*func)(void *data), void *data); 456 int hibernate_resume_nonboot_cpu_disable(void); 457 int arch_hibernation_header_save(void *addr, unsigned int max_size); 458 int arch_hibernation_header_restore(void *addr); 459 460 #else /* CONFIG_HIBERNATION */ 461 static inline void register_nosave_region(unsigned long b, unsigned long e) {} 462 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } 463 static inline void swsusp_set_page_free(struct page *p) {} 464 static inline void swsusp_unset_page_free(struct page *p) {} 465 466 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} 467 static inline int hibernate(void) { return -ENOSYS; } 468 static inline bool system_entering_hibernation(void) { return false; } 469 static inline bool hibernation_available(void) { return false; } 470 471 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { 472 return -ENOTSUPP; 473 } 474 #endif /* CONFIG_HIBERNATION */ 475 476 int arch_resume_nosmt(void); 477 478 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV 479 int is_hibernate_resume_dev(dev_t dev); 480 #else 481 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } 482 #endif 483 484 /* Hibernation and suspend events */ 485 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ 486 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ 487 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ 488 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ 489 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 490 #define PM_POST_RESTORE 0x0006 /* Restore failed */ 491 492 extern struct mutex system_transition_mutex; 493 494 #ifdef CONFIG_PM_SLEEP 495 void save_processor_state(void); 496 void restore_processor_state(void); 497 498 /* kernel/power/main.c */ 499 extern int register_pm_notifier(struct notifier_block *nb); 500 extern int unregister_pm_notifier(struct notifier_block *nb); 501 extern void ksys_sync_helper(void); 502 extern void pm_report_hw_sleep_time(u64 t); 503 extern void pm_report_max_hw_sleep(u64 t); 504 505 #define pm_notifier(fn, pri) { \ 506 static struct notifier_block fn##_nb = \ 507 { .notifier_call = fn, .priority = pri }; \ 508 register_pm_notifier(&fn##_nb); \ 509 } 510 511 /* drivers/base/power/wakeup.c */ 512 extern bool events_check_enabled; 513 514 static inline bool pm_suspended_storage(void) 515 { 516 return !gfp_has_io_fs(gfp_allowed_mask); 517 } 518 519 extern bool pm_wakeup_pending(void); 520 extern void pm_system_wakeup(void); 521 extern void pm_system_cancel_wakeup(void); 522 extern void pm_wakeup_clear(unsigned int irq_number); 523 extern void pm_system_irq_wakeup(unsigned int irq_number); 524 extern unsigned int pm_wakeup_irq(void); 525 extern bool pm_get_wakeup_count(unsigned int *count, bool block); 526 extern bool pm_save_wakeup_count(unsigned int count); 527 extern void pm_wakep_autosleep_enabled(bool set); 528 extern void pm_print_active_wakeup_sources(void); 529 530 extern unsigned int lock_system_sleep(void); 531 extern void unlock_system_sleep(unsigned int); 532 533 #else /* !CONFIG_PM_SLEEP */ 534 535 static inline int register_pm_notifier(struct notifier_block *nb) 536 { 537 return 0; 538 } 539 540 static inline int unregister_pm_notifier(struct notifier_block *nb) 541 { 542 return 0; 543 } 544 545 static inline void pm_report_hw_sleep_time(u64 t) {}; 546 static inline void pm_report_max_hw_sleep(u64 t) {}; 547 548 static inline void ksys_sync_helper(void) {} 549 550 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 551 552 static inline bool pm_suspended_storage(void) { return false; } 553 static inline bool pm_wakeup_pending(void) { return false; } 554 static inline void pm_system_wakeup(void) {} 555 static inline void pm_wakeup_clear(bool reset) {} 556 static inline void pm_system_irq_wakeup(unsigned int irq_number) {} 557 558 static inline unsigned int lock_system_sleep(void) { return 0; } 559 static inline void unlock_system_sleep(unsigned int flags) {} 560 561 #endif /* !CONFIG_PM_SLEEP */ 562 563 #ifdef CONFIG_PM_SLEEP_DEBUG 564 extern bool pm_print_times_enabled; 565 extern bool pm_debug_messages_on; 566 extern bool pm_debug_messages_should_print(void); 567 static inline int pm_dyn_debug_messages_on(void) 568 { 569 #ifdef CONFIG_DYNAMIC_DEBUG 570 return 1; 571 #else 572 return 0; 573 #endif 574 } 575 #ifndef pr_fmt 576 #define pr_fmt(fmt) "PM: " fmt 577 #endif 578 #define __pm_pr_dbg(fmt, ...) \ 579 do { \ 580 if (pm_debug_messages_should_print()) \ 581 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 582 else if (pm_dyn_debug_messages_on()) \ 583 pr_debug(fmt, ##__VA_ARGS__); \ 584 } while (0) 585 #define __pm_deferred_pr_dbg(fmt, ...) \ 586 do { \ 587 if (pm_debug_messages_should_print()) \ 588 printk_deferred(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 589 } while (0) 590 #else 591 #define pm_print_times_enabled (false) 592 #define pm_debug_messages_on (false) 593 594 #include <linux/printk.h> 595 596 #define __pm_pr_dbg(fmt, ...) \ 597 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 598 #define __pm_deferred_pr_dbg(fmt, ...) \ 599 no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) 600 #endif 601 602 /** 603 * pm_pr_dbg - print pm sleep debug messages 604 * 605 * If pm_debug_messages_on is enabled and the system is entering/leaving 606 * suspend, print message. 607 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled, 608 * print message only from instances explicitly enabled on dynamic debug's 609 * control. 610 * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is disabled, 611 * don't print message. 612 */ 613 #define pm_pr_dbg(fmt, ...) \ 614 __pm_pr_dbg(fmt, ##__VA_ARGS__) 615 616 #define pm_deferred_pr_dbg(fmt, ...) \ 617 __pm_deferred_pr_dbg(fmt, ##__VA_ARGS__) 618 619 #ifdef CONFIG_PM_AUTOSLEEP 620 621 /* kernel/power/autosleep.c */ 622 void queue_up_suspend_work(void); 623 624 #else /* !CONFIG_PM_AUTOSLEEP */ 625 626 static inline void queue_up_suspend_work(void) {} 627 628 #endif /* !CONFIG_PM_AUTOSLEEP */ 629 630 #endif /* _LINUX_SUSPEND_H */ 631