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-rw-r--r--include/linux/suspend.h20
1 files changed, 17 insertions, 3 deletions
diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index a6977423baf..2ce8207686e 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -86,6 +86,11 @@ typedef int __bitwise suspend_state_t;
* that implement @begin(), but platforms implementing @begin() should
* also provide a @end() which cleans up transitions aborted before
* @enter().
+ *
+ * @recover: Recover the platform from a suspend failure.
+ * Called by the PM core if the suspending of devices fails.
+ * This callback is optional and should only be implemented by platforms
+ * which require special recovery actions in that situation.
*/
struct platform_suspend_ops {
int (*valid)(suspend_state_t state);
@@ -94,6 +99,7 @@ struct platform_suspend_ops {
int (*enter)(suspend_state_t state);
void (*finish)(void);
void (*end)(void);
+ void (*recover)(void);
};
#ifdef CONFIG_SUSPEND
@@ -149,7 +155,7 @@ extern void mark_free_pages(struct zone *zone);
* The methods in this structure allow a platform to carry out special
* operations required by it during a hibernation transition.
*
- * All the methods below must be implemented.
+ * All the methods below, except for @recover(), must be implemented.
*
* @begin: Tell the platform driver that we're starting hibernation.
* Called right after shrinking memory and before freezing devices.
@@ -189,6 +195,11 @@ extern void mark_free_pages(struct zone *zone);
* @restore_cleanup: Clean up after a failing image restoration.
* Called right after the nonboot CPUs have been enabled and before
* thawing devices (runs with IRQs on).
+ *
+ * @recover: Recover the platform from a failure to suspend devices.
+ * Called by the PM core if the suspending of devices during hibernation
+ * fails. This callback is optional and should only be implemented by
+ * platforms which require special recovery actions in that situation.
*/
struct platform_hibernation_ops {
int (*begin)(void);
@@ -200,16 +211,17 @@ struct platform_hibernation_ops {
void (*leave)(void);
int (*pre_restore)(void);
void (*restore_cleanup)(void);
+ void (*recover)(void);
};
#ifdef CONFIG_HIBERNATION
/* kernel/power/snapshot.c */
extern void __register_nosave_region(unsigned long b, unsigned long e, int km);
-static inline void register_nosave_region(unsigned long b, unsigned long e)
+static inline void __init register_nosave_region(unsigned long b, unsigned long e)
{
__register_nosave_region(b, e, 0);
}
-static inline void register_nosave_region_late(unsigned long b, unsigned long e)
+static inline void __init register_nosave_region_late(unsigned long b, unsigned long e)
{
__register_nosave_region(b, e, 1);
}
@@ -266,4 +278,6 @@ static inline void register_nosave_region_late(unsigned long b, unsigned long e)
}
#endif
+extern struct mutex pm_mutex;
+
#endif /* _LINUX_SUSPEND_H */