kernel/power/power.h

   1 #include <linux/suspend.h>
   2 #include <linux/utsname.h>
   3
   4 /* With SUSPEND_CONSOLE defined, it 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
  13 struct swsusp_info {
  14         struct new_utsname      uts;
  15         u32                     version_code;
  16         unsigned long           num_physpages;
  17         int                     cpus;
  18         unsigned long           image_pages;
  19         unsigned long           pagedir_pages;
  20         suspend_pagedir_t       * suspend_pagedir;
  21         swp_entry_t             pagedir[768];
  22 } __attribute__((aligned(PAGE_SIZE)));
  23
  24
  25
  26 #ifdef CONFIG_SOFTWARE_SUSPEND
  27 extern int pm_suspend_disk(void);
  28
  29 #else
  30 static inline int pm_suspend_disk(void)
  31 {
  32         return -EPERM;
  33 }
  34 #endif
  35 extern struct semaphore pm_sem;
  36 #define power_attr(_name) \
  37 static struct subsys_attribute _name##_attr = { \
  38         .attr   = {                             \
  39                 .name = __stringify(_name),     \
  40                 .mode = 0644,                   \
  41         },                                      \
  42         .show   = _name##_show,                 \
  43         .store  = _name##_store,                \
  44 }
  45
  46 extern struct subsystem power_subsys;
  47
  48 extern int freeze_processes(void);
  49 extern void thaw_processes(void);
  50
  51 extern int pm_prepare_console(void);
  52 extern void pm_restore_console(void);