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-rw-r--r--include/acpi/acpi_bus.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index b53c058e7009..a3ef584c8c0c 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -587,6 +587,15 @@ struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
int acpi_disable_wakeup_device_power(struct acpi_device *dev);
+#ifdef CONFIG_X86
+bool acpi_device_always_present(struct acpi_device *adev);
+#else
+static inline bool acpi_device_always_present(struct acpi_device *adev)
+{
+ return false;
+}
+#endif
+
#ifdef CONFIG_PM
acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
void (*work_func)(struct work_struct *work));