kernel/power/power.h

   1
   2
   3 /* With SUSPEND_CONSOLE defined, it suspend looks *really* cool, but
   4    we probably do not take enough locks for switching consoles, etc,
   5    so bad things might happen.
   6 */
   7 #if defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
   8 #define SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
   9 #endif
  10
  11
  12 #ifdef CONFIG_PM_DISK
  13 extern int pm_suspend_disk(void);
  14
  15 #else
  16 static inline int pm_suspend_disk(void)
  17 {
  18         return -EPERM;
  19 }
  20 #endif
  21
  22 extern struct semaphore pm_sem;
  23 #define power_attr(_name) \
  24 static struct subsys_attribute _name##_attr = { \
  25         .attr   = {                             \
  26                 .name = __stringify(_name),     \
  27                 .mode = 0644,                   \
  28         },                                      \
  29         .show   = _name##_show,                 \
  30         .store  = _name##_store,                \
  31 }
  32
  33 extern struct subsystem power_subsys;
  34
  35 extern int freeze_processes(void);
  36 extern void thaw_processes(void);
  37
  38 extern int pm_prepare_console(void);
  39 extern void pm_restore_console(void);