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
pm_set_vt_switch(int do_switch)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
pm_prepare_console(void)25 static inline void pm_prepare_console(void)
26 {
27 }
28
pm_restore_console(void)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 enum suspend_stat_step failed_steps[REC_FAILED_NUM];
72 };
73
74 extern struct suspend_stats suspend_stats;
75
dpm_save_failed_dev(const char * name)76 static inline void dpm_save_failed_dev(const char *name)
77 {
78 strlcpy(suspend_stats.failed_devs[suspend_stats.last_failed_dev],
79 name,
80 sizeof(suspend_stats.failed_devs[0]));
81 suspend_stats.last_failed_dev++;
82 suspend_stats.last_failed_dev %= REC_FAILED_NUM;
83 }
84
dpm_save_failed_errno(int err)85 static inline void dpm_save_failed_errno(int err)
86 {
87 suspend_stats.errno[suspend_stats.last_failed_errno] = err;
88 suspend_stats.last_failed_errno++;
89 suspend_stats.last_failed_errno %= REC_FAILED_NUM;
90 }
91
dpm_save_failed_step(enum suspend_stat_step step)92 static inline void dpm_save_failed_step(enum suspend_stat_step step)
93 {
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 bool (*wake)(void);
195 void (*restore_early)(void);
196 void (*restore)(void);
197 void (*end)(void);
198 };
199
200 #ifdef CONFIG_SUSPEND
201 extern suspend_state_t mem_sleep_current;
202 extern suspend_state_t mem_sleep_default;
203
204 /**
205 * suspend_set_ops - set platform dependent suspend operations
206 * @ops: The new suspend operations to set.
207 */
208 extern void suspend_set_ops(const struct platform_suspend_ops *ops);
209 extern int suspend_valid_only_mem(suspend_state_t state);
210
211 extern unsigned int pm_suspend_global_flags;
212
213 #define PM_SUSPEND_FLAG_FW_SUSPEND BIT(0)
214 #define PM_SUSPEND_FLAG_FW_RESUME BIT(1)
215 #define PM_SUSPEND_FLAG_NO_PLATFORM BIT(2)
216
pm_suspend_clear_flags(void)217 static inline void pm_suspend_clear_flags(void)
218 {
219 pm_suspend_global_flags = 0;
220 }
221
pm_set_suspend_via_firmware(void)222 static inline void pm_set_suspend_via_firmware(void)
223 {
224 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_SUSPEND;
225 }
226
pm_set_resume_via_firmware(void)227 static inline void pm_set_resume_via_firmware(void)
228 {
229 pm_suspend_global_flags |= PM_SUSPEND_FLAG_FW_RESUME;
230 }
231
pm_set_suspend_no_platform(void)232 static inline void pm_set_suspend_no_platform(void)
233 {
234 pm_suspend_global_flags |= PM_SUSPEND_FLAG_NO_PLATFORM;
235 }
236
237 /**
238 * pm_suspend_via_firmware - Check if platform firmware will suspend the system.
239 *
240 * To be called during system-wide power management transitions to sleep states
241 * or during the subsequent system-wide transitions back to the working state.
242 *
243 * Return 'true' if the platform firmware is going to be invoked at the end of
244 * the system-wide power management transition (to a sleep state) in progress in
245 * order to complete it, or if the platform firmware has been invoked in order
246 * to complete the last (or preceding) transition of the system to a sleep
247 * state.
248 *
249 * This matters if the caller needs or wants to carry out some special actions
250 * depending on whether or not control will be passed to the platform firmware
251 * subsequently (for example, the device may need to be reset before letting the
252 * platform firmware manipulate it, which is not necessary when the platform
253 * firmware is not going to be invoked) or when such special actions may have
254 * been carried out during the preceding transition of the system to a sleep
255 * state (as they may need to be taken into account).
256 */
pm_suspend_via_firmware(void)257 static inline bool pm_suspend_via_firmware(void)
258 {
259 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_SUSPEND);
260 }
261
262 /**
263 * pm_resume_via_firmware - Check if platform firmware has woken up the system.
264 *
265 * To be called during system-wide power management transitions from sleep
266 * states.
267 *
268 * Return 'true' if the platform firmware has passed control to the kernel at
269 * the beginning of the system-wide power management transition in progress, so
270 * the event that woke up the system from sleep has been handled by the platform
271 * firmware.
272 */
pm_resume_via_firmware(void)273 static inline bool pm_resume_via_firmware(void)
274 {
275 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_FW_RESUME);
276 }
277
278 /**
279 * pm_suspend_no_platform - Check if platform may change device power states.
280 *
281 * To be called during system-wide power management transitions to sleep states
282 * or during the subsequent system-wide transitions back to the working state.
283 *
284 * Return 'true' if the power states of devices remain under full control of the
285 * kernel throughout the system-wide suspend and resume cycle in progress (that
286 * is, if a device is put into a certain power state during suspend, it can be
287 * expected to remain in that state during resume).
288 */
pm_suspend_no_platform(void)289 static inline bool pm_suspend_no_platform(void)
290 {
291 return !!(pm_suspend_global_flags & PM_SUSPEND_FLAG_NO_PLATFORM);
292 }
293
294 /* Suspend-to-idle state machnine. */
295 enum s2idle_states {
296 S2IDLE_STATE_NONE, /* Not suspended/suspending. */
297 S2IDLE_STATE_ENTER, /* Enter suspend-to-idle. */
298 S2IDLE_STATE_WAKE, /* Wake up from suspend-to-idle. */
299 };
300
301 extern enum s2idle_states __read_mostly s2idle_state;
302
idle_should_enter_s2idle(void)303 static inline bool idle_should_enter_s2idle(void)
304 {
305 return unlikely(s2idle_state == S2IDLE_STATE_ENTER);
306 }
307
308 extern bool pm_suspend_default_s2idle(void);
309 extern void __init pm_states_init(void);
310 extern void s2idle_set_ops(const struct platform_s2idle_ops *ops);
311 extern void s2idle_wake(void);
312
313 /**
314 * arch_suspend_disable_irqs - disable IRQs for suspend
315 *
316 * Disables IRQs (in the default case). This is a weak symbol in the common
317 * code and thus allows architectures to override it if more needs to be
318 * done. Not called for suspend to disk.
319 */
320 extern void arch_suspend_disable_irqs(void);
321
322 /**
323 * arch_suspend_enable_irqs - enable IRQs after suspend
324 *
325 * Enables IRQs (in the default case). This is a weak symbol in the common
326 * code and thus allows architectures to override it if more needs to be
327 * done. Not called for suspend to disk.
328 */
329 extern void arch_suspend_enable_irqs(void);
330
331 extern int pm_suspend(suspend_state_t state);
332 extern bool sync_on_suspend_enabled;
333 #else /* !CONFIG_SUSPEND */
334 #define suspend_valid_only_mem NULL
335
pm_suspend_clear_flags(void)336 static inline void pm_suspend_clear_flags(void) {}
pm_set_suspend_via_firmware(void)337 static inline void pm_set_suspend_via_firmware(void) {}
pm_set_resume_via_firmware(void)338 static inline void pm_set_resume_via_firmware(void) {}
pm_suspend_via_firmware(void)339 static inline bool pm_suspend_via_firmware(void) { return false; }
pm_resume_via_firmware(void)340 static inline bool pm_resume_via_firmware(void) { return false; }
pm_suspend_no_platform(void)341 static inline bool pm_suspend_no_platform(void) { return false; }
pm_suspend_default_s2idle(void)342 static inline bool pm_suspend_default_s2idle(void) { return false; }
343
suspend_set_ops(const struct platform_suspend_ops * ops)344 static inline void suspend_set_ops(const struct platform_suspend_ops *ops) {}
pm_suspend(suspend_state_t state)345 static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; }
sync_on_suspend_enabled(void)346 static inline bool sync_on_suspend_enabled(void) { return true; }
idle_should_enter_s2idle(void)347 static inline bool idle_should_enter_s2idle(void) { return false; }
pm_states_init(void)348 static inline void __init pm_states_init(void) {}
s2idle_set_ops(const struct platform_s2idle_ops * ops)349 static inline void s2idle_set_ops(const struct platform_s2idle_ops *ops) {}
s2idle_wake(void)350 static inline void s2idle_wake(void) {}
351 #endif /* !CONFIG_SUSPEND */
352
353 /* struct pbe is used for creating lists of pages that should be restored
354 * atomically during the resume from disk, because the page frames they have
355 * occupied before the suspend are in use.
356 */
357 struct pbe {
358 void *address; /* address of the copy */
359 void *orig_address; /* original address of a page */
360 struct pbe *next;
361 };
362
363 /* mm/page_alloc.c */
364 extern void mark_free_pages(struct zone *zone);
365
366 /**
367 * struct platform_hibernation_ops - hibernation platform support
368 *
369 * The methods in this structure allow a platform to carry out special
370 * operations required by it during a hibernation transition.
371 *
372 * All the methods below, except for @recover(), must be implemented.
373 *
374 * @begin: Tell the platform driver that we're starting hibernation.
375 * Called right after shrinking memory and before freezing devices.
376 *
377 * @end: Called by the PM core right after resuming devices, to indicate to
378 * the platform that the system has returned to the working state.
379 *
380 * @pre_snapshot: Prepare the platform for creating the hibernation image.
381 * Called right after devices have been frozen and before the nonboot
382 * CPUs are disabled (runs with IRQs on).
383 *
384 * @finish: Restore the previous state of the platform after the hibernation
385 * image has been created *or* put the platform into the normal operation
386 * mode after the hibernation (the same method is executed in both cases).
387 * Called right after the nonboot CPUs have been enabled and before
388 * thawing devices (runs with IRQs on).
389 *
390 * @prepare: Prepare the platform for entering the low power state.
391 * Called right after the hibernation image has been saved and before
392 * devices are prepared for entering the low power state.
393 *
394 * @enter: Put the system into the low power state after the hibernation image
395 * has been saved to disk.
396 * Called after the nonboot CPUs have been disabled and all of the low
397 * level devices have been shut down (runs with IRQs off).
398 *
399 * @leave: Perform the first stage of the cleanup after the system sleep state
400 * indicated by @set_target() has been left.
401 * Called right after the control has been passed from the boot kernel to
402 * the image kernel, before the nonboot CPUs are enabled and before devices
403 * are resumed. Executed with interrupts disabled.
404 *
405 * @pre_restore: Prepare system for the restoration from a hibernation image.
406 * Called right after devices have been frozen and before the nonboot
407 * CPUs are disabled (runs with IRQs on).
408 *
409 * @restore_cleanup: Clean up after a failing image restoration.
410 * Called right after the nonboot CPUs have been enabled and before
411 * thawing devices (runs with IRQs on).
412 *
413 * @recover: Recover the platform from a failure to suspend devices.
414 * Called by the PM core if the suspending of devices during hibernation
415 * fails. This callback is optional and should only be implemented by
416 * platforms which require special recovery actions in that situation.
417 */
418 struct platform_hibernation_ops {
419 int (*begin)(pm_message_t stage);
420 void (*end)(void);
421 int (*pre_snapshot)(void);
422 void (*finish)(void);
423 int (*prepare)(void);
424 int (*enter)(void);
425 void (*leave)(void);
426 int (*pre_restore)(void);
427 void (*restore_cleanup)(void);
428 void (*recover)(void);
429 };
430
431 #ifdef CONFIG_HIBERNATION
432 /* kernel/power/snapshot.c */
433 extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
register_nosave_region(unsigned long b,unsigned long e)434 static inline void __init register_nosave_region(unsigned long b, unsigned long e)
435 {
436 __register_nosave_region(b, e, 0);
437 }
register_nosave_region_late(unsigned long b,unsigned long e)438 static inline void __init register_nosave_region_late(unsigned long b, unsigned long e)
439 {
440 __register_nosave_region(b, e, 1);
441 }
442 extern int swsusp_page_is_forbidden(struct page *);
443 extern void swsusp_set_page_free(struct page *);
444 extern void swsusp_unset_page_free(struct page *);
445 extern unsigned long get_safe_page(gfp_t gfp_mask);
446 extern asmlinkage int swsusp_arch_suspend(void);
447 extern asmlinkage int swsusp_arch_resume(void);
448
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 #else /* CONFIG_HIBERNATION */
register_nosave_region(unsigned long b,unsigned long e)459 static inline void register_nosave_region(unsigned long b, unsigned long e) {}
register_nosave_region_late(unsigned long b,unsigned long e)460 static inline void register_nosave_region_late(unsigned long b, unsigned long e) {}
swsusp_page_is_forbidden(struct page * p)461 static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
swsusp_set_page_free(struct page * p)462 static inline void swsusp_set_page_free(struct page *p) {}
swsusp_unset_page_free(struct page * p)463 static inline void swsusp_unset_page_free(struct page *p) {}
464
hibernation_set_ops(const struct platform_hibernation_ops * ops)465 static inline void hibernation_set_ops(const struct platform_hibernation_ops *ops) {}
hibernate(void)466 static inline int hibernate(void) { return -ENOSYS; }
system_entering_hibernation(void)467 static inline bool system_entering_hibernation(void) { return false; }
hibernation_available(void)468 static inline bool hibernation_available(void) { return false; }
469
hibernate_quiet_exec(int (* func)(void * data),void * data)470 static inline int hibernate_quiet_exec(int (*func)(void *data), void *data) {
471 return -ENOTSUPP;
472 }
473 #endif /* CONFIG_HIBERNATION */
474
475 #ifdef CONFIG_HIBERNATION_SNAPSHOT_DEV
476 int is_hibernate_resume_dev(dev_t dev);
477 #else
is_hibernate_resume_dev(dev_t dev)478 static inline int is_hibernate_resume_dev(dev_t dev) { return 0; }
479 #endif
480
481 /* Hibernation and suspend events */
482 #define PM_HIBERNATION_PREPARE 0x0001 /* Going to hibernate */
483 #define PM_POST_HIBERNATION 0x0002 /* Hibernation finished */
484 #define PM_SUSPEND_PREPARE 0x0003 /* Going to suspend the system */
485 #define PM_POST_SUSPEND 0x0004 /* Suspend finished */
486 #define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */
487 #define PM_POST_RESTORE 0x0006 /* Restore failed */
488
489 extern struct mutex system_transition_mutex;
490
491 #ifdef CONFIG_PM_SLEEP
492 void save_processor_state(void);
493 void restore_processor_state(void);
494
495 /* kernel/power/main.c */
496 extern int register_pm_notifier(struct notifier_block *nb);
497 extern int unregister_pm_notifier(struct notifier_block *nb);
498 extern void ksys_sync_helper(void);
499
500 #define pm_notifier(fn, pri) { \
501 static struct notifier_block fn##_nb = \
502 { .notifier_call = fn, .priority = pri }; \
503 register_pm_notifier(&fn##_nb); \
504 }
505
506 /* drivers/base/power/wakeup.c */
507 extern bool events_check_enabled;
508 extern unsigned int pm_wakeup_irq;
509 extern suspend_state_t pm_suspend_target_state;
510
511 extern bool pm_wakeup_pending(void);
512 extern void pm_system_wakeup(void);
513 extern void pm_system_cancel_wakeup(void);
514 extern void pm_wakeup_clear(bool reset);
515 extern void pm_system_irq_wakeup(unsigned int irq_number);
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 void lock_system_sleep(void);
522 extern void unlock_system_sleep(void);
523
524 #else /* !CONFIG_PM_SLEEP */
525
register_pm_notifier(struct notifier_block * nb)526 static inline int register_pm_notifier(struct notifier_block *nb)
527 {
528 return 0;
529 }
530
unregister_pm_notifier(struct notifier_block * nb)531 static inline int unregister_pm_notifier(struct notifier_block *nb)
532 {
533 return 0;
534 }
535
ksys_sync_helper(void)536 static inline void ksys_sync_helper(void) {}
537
538 #define pm_notifier(fn, pri) do { (void)(fn); } while (0)
539
pm_wakeup_pending(void)540 static inline bool pm_wakeup_pending(void) { return false; }
pm_system_wakeup(void)541 static inline void pm_system_wakeup(void) {}
pm_wakeup_clear(bool reset)542 static inline void pm_wakeup_clear(bool reset) {}
pm_system_irq_wakeup(unsigned int irq_number)543 static inline void pm_system_irq_wakeup(unsigned int irq_number) {}
544
lock_system_sleep(void)545 static inline void lock_system_sleep(void) {}
unlock_system_sleep(void)546 static inline void unlock_system_sleep(void) {}
547
548 #endif /* !CONFIG_PM_SLEEP */
549
550 #ifdef CONFIG_PM_SLEEP_DEBUG
551 extern bool pm_print_times_enabled;
552 extern bool pm_debug_messages_on;
553 extern __printf(2, 3) void __pm_pr_dbg(bool defer, const char *fmt, ...);
554 #else
555 #define pm_print_times_enabled (false)
556 #define pm_debug_messages_on (false)
557
558 #include <linux/printk.h>
559
560 #define __pm_pr_dbg(defer, fmt, ...) \
561 no_printk(KERN_DEBUG fmt, ##__VA_ARGS__)
562 #endif
563
564 #define pm_pr_dbg(fmt, ...) \
565 __pm_pr_dbg(false, fmt, ##__VA_ARGS__)
566
567 #define pm_deferred_pr_dbg(fmt, ...) \
568 __pm_pr_dbg(true, fmt, ##__VA_ARGS__)
569
570 #ifdef CONFIG_PM_AUTOSLEEP
571
572 /* kernel/power/autosleep.c */
573 void queue_up_suspend_work(void);
574
575 #else /* !CONFIG_PM_AUTOSLEEP */
576
queue_up_suspend_work(void)577 static inline void queue_up_suspend_work(void) {}
578
579 #endif /* !CONFIG_PM_AUTOSLEEP */
580
581 #endif /* _LINUX_SUSPEND_H */
582