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-rw-r--r--include/linux/suspend.h35
1 files changed, 17 insertions, 18 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 57a692432f8a..95040cc33107 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -6,6 +6,7 @@
6#include <linux/init.h> 6#include <linux/init.h>
7#include <linux/pm.h> 7#include <linux/pm.h>
8#include <linux/mm.h> 8#include <linux/mm.h>
9#include <linux/freezer.h>
9#include <asm/errno.h> 10#include <asm/errno.h>
10 11
11#ifdef CONFIG_VT 12#ifdef CONFIG_VT
@@ -331,6 +332,8 @@ static inline bool system_entering_hibernation(void) { return false; }
331#define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */ 332#define PM_RESTORE_PREPARE 0x0005 /* Going to restore a saved image */
332#define PM_POST_RESTORE 0x0006 /* Restore failed */ 333#define PM_POST_RESTORE 0x0006 /* Restore failed */
333 334
335extern struct mutex pm_mutex;
336
334#ifdef CONFIG_PM_SLEEP 337#ifdef CONFIG_PM_SLEEP
335void save_processor_state(void); 338void save_processor_state(void);
336void restore_processor_state(void); 339void restore_processor_state(void);
@@ -351,6 +354,19 @@ extern bool events_check_enabled;
351extern bool pm_wakeup_pending(void); 354extern bool pm_wakeup_pending(void);
352extern bool pm_get_wakeup_count(unsigned int *count); 355extern bool pm_get_wakeup_count(unsigned int *count);
353extern 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
354#else /* !CONFIG_PM_SLEEP */ 370#else /* !CONFIG_PM_SLEEP */
355 371
356static inline int register_pm_notifier(struct notifier_block *nb) 372static inline int register_pm_notifier(struct notifier_block *nb)
@@ -366,28 +382,11 @@ static inline int unregister_pm_notifier(struct notifier_block *nb)
366#define pm_notifier(fn, pri) do { (void)(fn); } while (0) 382#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
367 383
368static inline bool pm_wakeup_pending(void) { return false; } 384static inline bool pm_wakeup_pending(void) { return false; }
369#endif /* !CONFIG_PM_SLEEP */
370
371extern struct mutex pm_mutex;
372 385
373#ifndef CONFIG_HIBERNATE_CALLBACKS
374static inline void lock_system_sleep(void) {} 386static inline void lock_system_sleep(void) {}
375static inline void unlock_system_sleep(void) {} 387static inline void unlock_system_sleep(void) {}
376 388
377#else 389#endif /* !CONFIG_PM_SLEEP */
378
379/* Let some subsystems like memory hotadd exclude hibernation */
380
381static inline void lock_system_sleep(void)
382{
383 mutex_lock(&pm_mutex);
384}
385
386static inline void unlock_system_sleep(void)
387{
388 mutex_unlock(&pm_mutex);
389}
390#endif
391 390
392#ifdef CONFIG_ARCH_SAVE_PAGE_KEYS 391#ifdef CONFIG_ARCH_SAVE_PAGE_KEYS
393/* 392/*