diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
index ab65b2c2560ec5901c743245d73716683093b070..f39fbc6b9237687a3ffd0c1b387499bb6ad0714c 100644
--- a/drivers/acpi/namespace/nsxfeval.c
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -540,7 +540,7 @@ acpi_ns_get_device_callback(acpi_handle obj_handle,
  ******************************************************************************/
 
 acpi_status
-acpi_get_devices(char *HID,
+acpi_get_devices(const char *HID,
 		 acpi_walk_callback user_function,
 		 void *context, void **return_value)
 {
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index b5cca5daa348802e25426990f9e290db9d3621f9..3d7ab9e0c9fe2e93dacda51f409b65cbe5a0bb3f 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -130,7 +130,7 @@ acpi_walk_namespace(acpi_object_type type,
 		    void *context, void **return_value);
 
 acpi_status
-acpi_get_devices(char *HID,
+acpi_get_devices(const char *HID,
 		 acpi_walk_callback user_function,
 		 void *context, void **return_value);
 
diff --git a/include/acpi/acstruct.h b/include/acpi/acstruct.h
index aeb4498e5e06047b52ea521e2a8ad69cb3428630..88482655407f04fce85d9a35baa3ad8e1b17b624 100644
--- a/include/acpi/acstruct.h
+++ b/include/acpi/acstruct.h
@@ -146,7 +146,7 @@ struct acpi_init_walk_info {
 struct acpi_get_devices_info {
 	acpi_walk_callback user_function;
 	void *context;
-	char *hid;
+	const char *hid;
 };
 
 union acpi_aml_operands {