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 #define SUSPEND_NR_STEPS SUSPEND_RESUME 56 57 struct suspend_stats { 58 unsigned int step_failures[SUSPEND_NR_STEPS]; 59 int success; 60 int fail; 61 #define REC_FAILED_NUM 2 62 int last_failed_dev; 63 char failed_devs[REC_FAILED_NUM][40]; 64 int last_failed_errno; 65 int errno[REC_FAILED_NUM]; 66 int last_failed_step; 67 u64 last_hw_sleep; 68 u64 total_hw_sleep; 69 u64 max_hw_sleep; 70 enum suspend_stat_step failed_steps[REC_FAILED_NUM]; 71 }; 72 73 extern struct suspend_stats suspend_stats; 74 75 static inline void dpm_save_failed_dev(const char *name) 76 { 77 strscpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev], 78 name, 79 sizeof(suspend_stats.failed_devs[0])); 80 suspend_stats.last_failed_dev++; 81 suspend_stats.last_failed_dev %= REC_FAILED_NUM; 82 } 83 84 static inline void dpm_save_failed_errno(int err) 85 { 86 suspend_stats.errno[suspend_stats.last_failed_errno] = err; 87 suspend_stats.last_failed_errno++; 88 suspend_stats.last_failed_errno %= REC_FAILED_NUM; 89 } 90 91 static inline void dpm_save_failed_step(enum suspend_stat_step step) 92 { 93 suspend_stats.step_failures[step-1]++; 94 suspend_stats.failed_steps[suspend_stats.last_failed_step] = step; 95 suspend_stats.last_failed_step++; 96 suspend_stats.last_failed_step %= REC_FAILED_NUM; 97 } 98 99 /** 100 * struct platform_suspend_ops - Callbacks for managing platform dependent 101 * system sleep states. 102 * 103 * @valid: Callback to determine if given system sleep state is supported by 104 * the platform. 105 * Valid (ie. supported) states are advertised in /sys/power/state. Note 106 * that it still may be impossible to enter given system sleep state if the 107 * conditions aren't right. 108 * There is the %suspend_valid_only_mem function available that can be 109 * assigned to this if the platform only supports mem sleep. 110 * 111 * @begin: Initialise a transition to given system sleep state. 112 * @begin() is executed right prior to suspending devices. The information 113 * conveyed to the platform code by @begin() should be disregarded by it as 114 * soon as @end() is executed. If @begin() fails (ie. returns nonzero), 115 * @prepare(), @enter() and @finish() will not be called by the PM core. 116 * This callback is optional. However, if it is implemented, the argument 117 * passed to @enter() is redundant and should be ignored. 118 * 119 * @prepare: Prepare the platform for entering the system sleep state indicated 120 * by @begin(). 121 * @prepare() is called right after devices have been suspended (ie. the 122 * appropriate .suspend() method has been executed for each device) and 123 * before device drivers' late suspend callbacks are executed. It returns 124 * 0 on success or a negative error code otherwise, in which case the 125 * system cannot enter the desired sleep state (@prepare_late(), @enter(), 126 * and @wake() will not be called in that case). 127 * 128 * @prepare_late: Finish preparing the platform for entering the system sleep 129 * state indicated by @begin(). 130 * @prepare_late is called before disabling nonboot CPUs and after 131 * device drivers' late suspend callbacks have been executed. It returns 132 * 0 on success or a negative error code otherwise, in which case the 133 * system cannot enter the desired sleep state (@enter() will not be 134 * executed). 135 * 136 * @enter: Enter the system sleep state indicated by @begin() or represented by 137 * the argument if @begin() is not implemented. 138 * This callback is mandatory. It returns 0 on success or a negative 139 * error code otherwise, in which case the system cannot enter the desired 140 * sleep state. 141 * 142 * @wake: Called when the system has just left a sleep state, right after 143 * the nonboot CPUs have been enabled and before device drivers' early 144 * resume callbacks are executed. 145 * This callback is optional, but should be implemented by the platforms 146 * that implement @prepare_late(). If implemented, it is always called 147 * after @prepare_late and @enter(), even if one of them fails. 148 * 149 * @finish: Finish wake-up of the platform. 150 * @finish is called right prior to calling device drivers' regular suspend 151 * callbacks. 152 * This callback is optional, but should be implemented by the platforms 153 * that implement @prepare(). If implemented, it is always called after 154 * @enter() and @wake(), even if any of them fails. It is executed after 155 * a failing @prepare. 156 * 157 * @suspend_again: Returns whether the system should suspend again (true) or 158 * not (false). If the platform wants to poll sensors or execute some 159 * code during suspended without invoking userspace and most of devices, 160 * suspend_again callback is the place assuming that periodic-wakeup or 161 * alarm-wakeup is already setup. This allows to execute some codes while 162 * being kept suspended in the view of userland and devices. 163 * 164 * @end: Called by the PM core right after resuming devices, to indicate to 165 * the platform that the system has returned to the working state or 166 * the transition to the sleep state has been aborted. 167 * This callback is optional, but should be implemented by the platforms 168 * that implement @begin(). Accordingly, platforms implementing @begin() 169 * should also provide a @end() which cleans up transitions aborted before 170 * @enter(). 171 * 172 * @recover: Recover the platform from a suspend failure. 173 * Called by the PM core if the suspending of devices fails. 174 * This callback is optional and should only be implemented by platforms 175 * which require special recovery actions in that situation. 176 */ 177 struct platform_suspend_ops { 178 int (*valid)(suspend_state_t state); 179 int (*begin)(suspend_state_t state); 180 int (*prepare)(void); 181 int (*prepare_late)(void); 182 int (*enter)(suspend_state_t state); 183 void (*wake)(void); 184 void (*finish)(void); 185 bool (*suspend_again)(void); 186 void (*end)(void); 187 void (*recover)(void); 188 }; 189 190 struct platform_s2idle_ops { 191 int (*begin)(void); 192 int (*prepare)(void); 193 int (*prepare_late)(void); 194 void (*check)(void); 195 bool (*wake)(void); 196 void (*restore_early)(void); 197 void (*restore)(void); 198 void (*end)(void); 199 }; 200 201 #ifdef CONFIG_SUSPEND 202 extern suspend_state_t pm_suspend_target_state; 203 extern suspend_state_t mem_sleep_current; 204 extern suspend_state_t mem_sleep_default; 205 206 /** 207 * suspend_set_ops - set platform dependent suspend operations 208 * @ops: The new suspend operations to set. 209 */ 210 extern void suspend_set_ops(const struct platform_suspend_ops *ops); 211 extern int suspend_valid_only_mem(suspend_state_t state); 212 213 extern unsigned int pm_suspend_global_flags; 214 215 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0) 216 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1) 217 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2) 218 219 static inline void pm_suspend_clear_flags(void) 220 { 221 pm_suspend_global_flags = 0; 222 } 223 224 static inline void pm_set_suspend_via_firmware(void) 225 { 226 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND; 227 } 228 229 static inline void pm_set_resume_via_firmware(void) 230 { 231 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME; 232 } 233 234 static inline void pm_set_suspend_no_platform(void) 235 { 236 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM; 237 } 238 239 /** 240 * pm_suspend_via_firmware - Check if platform firmware will suspend the system. 241 * 242 * To be called during system-wide power management transitions to sleep states 243 * or during the subsequent system-wide transitions back to the working state. 244 * 245 * Return 'true' if the platform firmware is going to be invoked at the end of 246 * the system-wide power management transition (to a sleep state) in progress in 247 * order to complete it, or if the platform firmware has been invoked in order 248 * to complete the last (or preceding) transition of the system to a sleep 249 * state. 250 * 251 * This matters if the caller needs or wants to carry out some special actions 252 * depending on whether or not control will be passed to the platform firmware 253 * subsequently (for example, the device may need to be reset before letting the 254 * platform firmware manipulate it, which is not necessary when the platform 255 * firmware is not going to be invoked) or when such special actions may have 256 * been carried out during the preceding transition of the system to a sleep 257 * state (as they may need to be taken into account). 258 */ 259 static inline bool pm_suspend_via_firmware(void) 260 { 261 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND); 262 } 263 264 /** 265 * pm_resume_via_firmware - Check if platform firmware has woken up the system. 266 * 267 * To be called during system-wide power management transitions from sleep 268 * states. 269 * 270 * Return 'true' if the platform firmware has passed control to the kernel at 271 * the beginning of the system-wide power management transition in progress, so 272 * the event that woke up the system from sleep has been handled by the platform 273 * firmware. 274 */ 275 static inline bool pm_resume_via_firmware(void) 276 { 277 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME); 278 } 279 280 /** 281 * pm_suspend_no_platform - Check if platform may change device power states. 282 * 283 * To be called during system-wide power management transitions to sleep states 284 * or during the subsequent system-wide transitions back to the working state. 285 * 286 * Return 'true' if the power states of devices remain under full control of the 287 * kernel throughout the system-wide suspend and resume cycle in progress (that 288 * is, if a device is put into a certain power state during suspend, it can be 289 * expected to remain in that state during resume). 290 */ 291 static inline bool pm_suspend_no_platform(void) 292 { 293 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM); 294 } 295 296 /* Suspend-to-idle state machnine. */ 297 enum s2idle_states { 298 S2IDLE_STATE_NONE, /* Not suspended/suspending. */ 299 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */ 300 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */ 301 }; 302 303 extern enum s2idle_states __read_mostly s2idle_state; 304 305 static inline bool idle_should_enter_s2idle(void) 306 { 307 return unlikely(s2idle_state == S2IDLE_STATE_ENTER); 308 } 309 310 extern bool pm_suspend_default_s2idle(void); 311 extern void __init pm_states_init(void); 312 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops); 313 extern void s2idle_wake(void); 314 315 /** 316 * arch_suspend_disable_irqs - disable IRQs for suspend 317 * 318 * Disables IRQs (in the default case). This is a weak symbol in the common 319 * code and thus allows architectures to override it if more needs to be 320 * done. Not called for suspend to disk. 321 */ 322 extern void arch_suspend_disable_irqs(void); 323 324 /** 325 * arch_suspend_enable_irqs - enable IRQs after suspend 326 * 327 * Enables IRQs (in the default case). This is a weak symbol in the common 328 * code and thus allows architectures to override it if more needs to be 329 * done. Not called for suspend to disk. 330 */ 331 extern void arch_suspend_enable_irqs(void); 332 333 extern int pm_suspend(suspend_state_t state); 334 extern bool sync_on_suspend_enabled; 335 #else /* !CONFIG_SUSPEND */ 336 #define suspend_valid_only_mem NULL 337 338 #define pm_suspend_target_state (PM_SUSPEND_ON) 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 int hibernate_resume_nonboot_cpu_disable(void); 453 int arch_hibernation_header_save(void *addr, unsigned int max_size); 454 int arch_hibernation_header_restore(void *addr); 455 456 #else /* CONFIG_HIBERNATION */ 457 static inline void register_nosave_region(unsigned long b, unsigned long e) {} 458 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } 459 static inline void swsusp_set_page_free(struct page *p) {} 460 static inline void swsusp_unset_page_free(struct page *p) {} 461 462 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {} 463 static inline int hibernate(void) { return -ENOSYS; } 464 static inline bool system_entering_hibernation(void) { return false; } 465 static inline bool hibernation_available(void) { return false; } 466 467 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) { 468 return -ENOTSUPP; 469 } 470 #endif /* CONFIG_HIBERNATION */ 471 472 int arch_resume_nosmt(void); 473 474 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV 475 int is_hibernate_resume_dev(dev_t dev); 476 #else 477 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; } 478 #endif 479 480 /* Hibernation and suspend events */ 481 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */ 482 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */ 483 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */ 484 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */ 485 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 486 #define PM_POST_RESTORE 0x0006 /* Restore failed */ 487 488 extern struct mutex system_transition_mutex; 489 490 #ifdef CONFIG_PM_SLEEP 491 void save_processor_state(void); 492 void restore_processor_state(void); 493 494 /* kernel/power/main.c */ 495 extern int register_pm_notifier(struct notifier_block *nb); 496 extern int unregister_pm_notifier(struct notifier_block *nb); 497 extern void ksys_sync_helper(void); 498 extern void pm_report_hw_sleep_time(u64 t); 499 extern void pm_report_max_hw_sleep(u64 t); 500 501 #define pm_notifier(fn, pri) { \ 502 static struct notifier_block fn##_nb = \ 503 { .notifier_call = fn, .priority = pri }; \ 504 register_pm_notifier(&fn##_nb); \ 505 } 506 507 /* drivers/base/power/wakeup.c */ 508 extern bool events_check_enabled; 509 510 static inline bool pm_suspended_storage(void) 511 { 512 return !gfp_has_io_fs(gfp_allowed_mask); 513 } 514 515 extern bool pm_wakeup_pending(void); 516 extern void pm_system_wakeup(void); 517 extern void pm_system_cancel_wakeup(void); 518 extern void pm_wakeup_clear(unsigned int irq_number); 519 extern void pm_system_irq_wakeup(unsigned int irq_number); 520 extern unsigned int pm_wakeup_irq(void); 521 extern bool pm_get_wakeup_count(unsigned int *count, bool block); 522 extern bool pm_save_wakeup_count(unsigned int count); 523 extern void pm_wakep_autosleep_enabled(bool set); 524 extern void pm_print_active_wakeup_sources(void); 525 526 extern unsigned int lock_system_sleep(void); 527 extern void unlock_system_sleep(unsigned int); 528 529 #else /* !CONFIG_PM_SLEEP */ 530 531 static inline int register_pm_notifier(struct notifier_block *nb) 532 { 533 return 0; 534 } 535 536 static inline int unregister_pm_notifier(struct notifier_block *nb) 537 { 538 return 0; 539 } 540 541 static inline void pm_report_hw_sleep_time(u64 t) {}; 542 static inline void pm_report_max_hw_sleep(u64 t) {}; 543 544 static inline void ksys_sync_helper(void) {} 545 546 #define pm_notifier(fn, pri) do { (void)(fn); } while (0) 547 548 static inline bool pm_suspended_storage(void) { return false; } 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