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         swp_entry_t             start;
  20 } __attribute__((aligned(PAGE_SIZE)));
  21
  22
  23
  24 #ifdef CONFIG_SOFTWARE_SUSPEND
  25 extern int pm_suspend_disk(void);
  26
  27 #else
  28 static inline int pm_suspend_disk(void)
  29 {
  30         return -EPERM;
  31 }
  32 #endif
  33 extern struct semaphore pm_sem;
  34 #define power_attr(_name) \
  35 static struct subsys_attribute _name##_attr = { \
  36         .attr   = {                             \
  37                 .name = __stringify(_name),     \
  38                 .mode = 0644,                   \
  39         },                                      \
  40         .show   = _name##_show,                 \
  41         .store  = _name##_store,                \
  42 }
  43
  44 extern struct subsystem power_subsys;
  45
  46 extern int freeze_processes(void);
  47 extern void thaw_processes(void);
  48
  49 extern int pm_prepare_console(void);
  50 extern void pm_restore_console(void);
  51
  52 /* References to section boundaries */
  53 extern const void __nosave_begin, __nosave_end;
  54
  55 extern unsigned int nr_copy_pages;
  56 extern struct pbe *pagedir_nosave;
  57
  58 /*
  59  * This compilation switch determines the way in which memory will be freed
  60  * during suspend.  If defined, only as much memory will be freed as needed
  61  * to complete the suspend, which will make it go faster.  Otherwise, the
  62  * largest possible amount of memory will be freed.
  63  */
  64 #define FAST_FREE       1
  65
  66 extern asmlinkage int swsusp_arch_suspend(void);
  67 extern asmlinkage int swsusp_arch_resume(void);
  68
  69 extern unsigned int count_data_pages(void);
  70 extern void free_pagedir(struct pbe *pblist);
  71 extern void release_eaten_pages(void);
  72 extern struct pbe *alloc_pagedir(unsigned nr_pages, gfp_t gfp_mask, int safe_needed);
  73 extern void swsusp_free(void);
  74 extern int alloc_data_pages(struct pbe *pblist, gfp_t gfp_mask, int safe_needed);
  75 extern unsigned int snapshot_nr_pages(void);
  76 extern struct pbe *snapshot_pblist(void);
  77 extern void snapshot_pblist_set(struct pbe *pblist);