kernel/power/power.h

   1 #include <linux/suspend.h>
   2 #include <linux/utsname.h>
   3
   4 /* With SUSPEND_CONSOLE defined suspend looks *really* cool, but
   5    we probably do not take enough locks for switching consoles, etc,
   6    so bad things might happen.
   7 */
   8 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
   9 #define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
  10 #endif
  11
  12 struct swsusp_info {
  13         struct new_utsname      uts;
  14         u32                     version_code;
  15         unsigned long           num_physpages;
  16         int                     cpus;
  17         unsigned long           image_pages;
  18         unsigned long           pages;
  19 } __attribute__((aligned(PAGE_SIZE)));
  20
  21
  22
  23 #ifdef CONFIG_SOFTWARE_SUSPEND
  24 extern int pm_suspend_disk(void);
  25
  26 #else
  27 static inline int pm_suspend_disk(void)
  28 {
  29         return -EPERM;
  30 }
  31 #endif
  32 extern struct semaphore pm_sem;
  33 #define power_attr(_name) \
  34 static struct subsys_attribute _name##_attr = { \
  35         .attr   = {                             \
  36                 .name = __stringify(_name),     \
  37                 .mode = 0644,                   \
  38         },                                      \
  39         .show   = _name##_show,                 \
  40         .store  = _name##_store,                \
  41 }
  42
  43 extern struct subsystem power_subsys;
  44
  45 extern int pm_prepare_console(void);
  46 extern void pm_restore_console(void);
  47
  48 /* References to section boundaries */
  49 extern const void __nosave_begin, __nosave_end;
  50
  51 extern unsigned int nr_copy_pages;
  52 extern struct pbe *pagedir_nosave;
  53
  54 /* Preferred image size in MB (default 500) */
  55 extern unsigned int image_size;
  56
  57 extern asmlinkage int swsusp_arch_suspend(void);
  58 extern asmlinkage int swsusp_arch_resume(void);
  59
  60 extern unsigned int count_data_pages(void);
  61 extern void free_pagedir(struct pbe *pblist);
  62 extern void release_eaten_pages(void);
  63 extern struct pbe *alloc_pagedir(unsigned nr_pages, gfp_t gfp_mask, int safe_needed);
  64 extern void swsusp_free(void);
  65 extern int alloc_data_pages(struct pbe *pblist, gfp_t gfp_mask, int safe_needed);
  66 extern unsigned int snapshot_nr_pages(void);
  67 extern struct pbe *snapshot_pblist(void);
  68 extern void snapshot_pblist_set(struct pbe *pblist);