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-rw-r--r--include/linux/suspend.h2
-rw-r--r--kernel/power/disk.c10
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index 2b409c44db8..c7d9bb1832b 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -237,6 +237,7 @@ extern int hibernate_nvs_alloc(void);
extern void hibernate_nvs_free(void);
extern void hibernate_nvs_save(void);
extern void hibernate_nvs_restore(void);
+extern bool system_entering_hibernation(void);
#else /* CONFIG_HIBERNATION */
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
static inline void swsusp_set_page_free(struct page *p) {}
@@ -252,6 +253,7 @@ static inline int hibernate_nvs_alloc(void) { return 0; }
static inline void hibernate_nvs_free(void) {}
static inline void hibernate_nvs_save(void) {}
static inline void hibernate_nvs_restore(void) {}
+static inline bool system_entering_hibernation(void) { return false; }
#endif /* CONFIG_HIBERNATION */
#ifdef CONFIG_PM_SLEEP
diff --git a/kernel/power/disk.c b/kernel/power/disk.c
index 45e8541ab7e..432ee575c9e 100644
--- a/kernel/power/disk.c
+++ b/kernel/power/disk.c
@@ -71,6 +71,14 @@ void hibernation_set_ops(struct platform_hibernation_ops *ops)
mutex_unlock(&pm_mutex);
}
+static bool entering_platform_hibernation;
+
+bool system_entering_hibernation(void)
+{
+ return entering_platform_hibernation;
+}
+EXPORT_SYMBOL(system_entering_hibernation);
+
#ifdef CONFIG_PM_DEBUG
static void hibernation_debug_sleep(void)
{
@@ -411,6 +419,7 @@ int hibernation_platform_enter(void)
if (error)
goto Close;
+ entering_platform_hibernation = true;
suspend_console();
error = device_suspend(PMSG_HIBERNATE);
if (error) {
@@ -445,6 +454,7 @@ int hibernation_platform_enter(void)
Finish:
hibernation_ops->finish();
Resume_devices:
+ entering_platform_hibernation = false;
device_resume(PMSG_RESTORE);
resume_console();
Close: