include/acpi/button.h

   1 #ifndef ACPI_BUTTON_H
   2 #define ACPI_BUTTON_H
   3
   4 #include <linux/notifier.h>
   5
   6 #if IS_ENABLED(CONFIG_ACPI_BUTTON)
   7 extern int acpi_lid_notifier_register(struct notifier_block *nb);
   8 extern int acpi_lid_notifier_unregister(struct notifier_block *nb);
   9 extern int acpi_lid_open(void);
  10 #else
  11 static inline int acpi_lid_notifier_register(struct notifier_block *nb)
  12 {
  13         return 0;
  14 }
  15 static inline int acpi_lid_notifier_unregister(struct notifier_block *nb)
  16 {
  17         return 0;
  18 }
  19 static inline int acpi_lid_open(void)
  20 {
  21         return 1;
  22 }
  23 #endif /* IS_ENABLED(CONFIG_ACPI_BUTTON) */
  24
  25 #endif /* ACPI_BUTTON_H */