include/linux/suspend.h

   1 #ifndef _LINUX_SWSUSP_H
   2 #define _LINUX_SWSUSP_H
   3
   4 #if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32)
   5 #include <asm/suspend.h>
   6 #endif
   7 #include <linux/swap.h>
   8 #include <linux/notifier.h>
   9 #include <linux/init.h>
  10 #include <linux/pm.h>
  11
  12 /* page backup entry */
  13 struct pbe {
  14         unsigned long address;          /* address of the copy */
  15         unsigned long orig_address;     /* original address of page */
  16         struct pbe *next;
  17 };
  18
  19 /* mm/page_alloc.c */
  20 extern void drain_local_pages(void);
  21 extern void mark_free_pages(struct zone *zone);
  22
  23 #ifdef CONFIG_PM
  24 /* kernel/power/swsusp.c */
  25 extern int software_suspend(void);
  26
  27 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
  28 extern int pm_prepare_console(void);
  29 extern void pm_restore_console(void);
  30 #else
  31 static inline int pm_prepare_console(void) { return 0; }
  32 static inline void pm_restore_console(void) {}
  33 #endif /* defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) */
  34 #else
  35 static inline int software_suspend(void)
  36 {
  37         printk("Warning: fake suspend called\n");
  38         return -ENOSYS;
  39 }
  40 #endif /* CONFIG_PM */
  41
  42 void save_processor_state(void);
  43 void restore_processor_state(void);
  44 struct saved_context;
  45 void __save_processor_state(struct saved_context *ctxt);
  46 void __restore_processor_state(struct saved_context *ctxt);
  47 unsigned long get_safe_page(gfp_t gfp_mask);
  48
  49 /*
  50  * XXX: We try to keep some more pages free so that I/O operations succeed
  51  * without paging. Might this be more?
  52  */
  53 #define PAGES_FOR_IO    1024
  54
  55 #endif /* _LINUX_SWSUSP_H */