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-rw-r--r--include/linux/suspend.h36
1 files changed, 16 insertions, 20 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 906d62cfc15c..95040cc33107 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -332,6 +332,8 @@ static inline bool system_entering_hibernation(void) { return false; }
332#define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 332#define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */
333#define PM_POST_RESTORE 0x0006 /* Restore failed */ 333#define PM_POST_RESTORE 0x0006 /* Restore failed */
334 334
335extern struct mutex pm_mutex;
336
335#ifdef CONFIG_PM_SLEEP 337#ifdef CONFIG_PM_SLEEP
336void save_processor_state(void); 338void save_processor_state(void);
337void restore_processor_state(void); 339void restore_processor_state(void);
@@ -352,6 +354,19 @@ extern bool events_check_enabled;
352extern bool pm_wakeup_pending(void); 354extern bool pm_wakeup_pending(void);
353extern bool pm_get_wakeup_count(unsigned int *count); 355extern bool pm_get_wakeup_count(unsigned int *count);
354extern bool pm_save_wakeup_count(unsigned int count); 356extern bool pm_save_wakeup_count(unsigned int count);
357
358static inline void lock_system_sleep(void)
359{
360 freezer_do_not_count();
361 mutex_lock(&pm_mutex);
362}
363
364static inline void unlock_system_sleep(void)
365{
366 mutex_unlock(&pm_mutex);
367 freezer_count();
368}
369
355#else /* !CONFIG_PM_SLEEP */ 370#else /* !CONFIG_PM_SLEEP */
356 371
357static inline int register_pm_notifier(struct notifier_block *nb) 372static inline int register_pm_notifier(struct notifier_block *nb)
@@ -367,30 +382,11 @@ static inline int unregister_pm_notifier(struct notifier_block *nb)
367#define pm_notifier(fn, pri) do { (void)(fn); } while (0) 382#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
368 383
369static inline bool pm_wakeup_pending(void) { return false; } 384static inline bool pm_wakeup_pending(void) { return false; }
370#endif /* !CONFIG_PM_SLEEP */
371
372extern struct mutex pm_mutex;
373 385
374#ifndef CONFIG_HIBERNATE_CALLBACKS
375static inline void lock_system_sleep(void) {} 386static inline void lock_system_sleep(void) {}
376static inline void unlock_system_sleep(void) {} 387static inline void unlock_system_sleep(void) {}
377 388
378#else 389#endif /* !CONFIG_PM_SLEEP */
379
380/* Let some subsystems like memory hotadd exclude hibernation */
381
382static inline void lock_system_sleep(void)
383{
384 freezer_do_not_count();
385 mutex_lock(&pm_mutex);
386}
387
388static inline void unlock_system_sleep(void)
389{
390 mutex_unlock(&pm_mutex);
391 freezer_count();
392}
393#endif
394 390
395#ifdef CONFIG_ARCH_SAVE_PAGE_KEYS 391#ifdef CONFIG_ARCH_SAVE_PAGE_KEYS
396/* 392/*