return status;
 }
 
-static acpi_status AMW0_get_u32(u32 *value, u32 cap,
-struct wmi_interface *iface)
+static acpi_status AMW0_get_u32(u32 *value, u32 cap)
 {
        int err;
        u8 result;
        return AE_OK;
 }
 
-static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
+static acpi_status AMW0_set_u32(u32 value, u32 cap)
 {
        struct wmab_args args;
 
        return status;
 }
 
-static acpi_status WMID_get_u32(u32 *value, u32 cap,
-struct wmi_interface *iface)
+static acpi_status WMID_get_u32(u32 *value, u32 cap)
 {
        acpi_status status;
        u8 tmp;
        return status;
 }
 
-static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
+static acpi_status WMID_set_u32(u32 value, u32 cap)
 {
        u32 method_id = 0;
        char param;
 
        switch (interface->type) {
        case ACER_AMW0:
-               status = AMW0_get_u32(value, cap, interface);
+               status = AMW0_get_u32(value, cap);
                break;
        case ACER_AMW0_V2:
                if (cap == ACER_CAP_MAILLED) {
-                       status = AMW0_get_u32(value, cap, interface);
+                       status = AMW0_get_u32(value, cap);
                        break;
                }
        case ACER_WMID:
-               status = WMID_get_u32(value, cap, interface);
+               status = WMID_get_u32(value, cap);
                break;
        case ACER_WMID_v2:
                if (cap & (ACER_CAP_WIRELESS |
                           ACER_CAP_THREEG))
                        status = wmid_v2_get_u32(value, cap);
                else if (wmi_has_guid(WMID_GUID2))
-                       status = WMID_get_u32(value, cap, interface);
+                       status = WMID_get_u32(value, cap);
                break;
        }
 
        if (interface->capability & cap) {
                switch (interface->type) {
                case ACER_AMW0:
-                       return AMW0_set_u32(value, cap, interface);
+                       return AMW0_set_u32(value, cap);
                case ACER_AMW0_V2:
                        if (cap == ACER_CAP_MAILLED)
-                               return AMW0_set_u32(value, cap, interface);
+                               return AMW0_set_u32(value, cap);
 
                        /*
                         * On some models, some WMID methods don't toggle
                         */
                        if (cap == ACER_CAP_WIRELESS ||
                                cap == ACER_CAP_BLUETOOTH) {
-                               status = WMID_set_u32(value, cap, interface);
+                               status = WMID_set_u32(value, cap);
                                if (ACPI_FAILURE(status))
                                        return status;
 
-                               return AMW0_set_u32(value, cap, interface);
+                               return AMW0_set_u32(value, cap);
                        }
                case ACER_WMID:
-                       return WMID_set_u32(value, cap, interface);
+                       return WMID_set_u32(value, cap);
                case ACER_WMID_v2:
                        if (cap & (ACER_CAP_WIRELESS |
                                   ACER_CAP_BLUETOOTH |
                                   ACER_CAP_THREEG))
                                return wmid_v2_set_u32(value, cap);
                        else if (wmi_has_guid(WMID_GUID2))
-                               return WMID_set_u32(value, cap, interface);
+                               return WMID_set_u32(value, cap);
                default:
                        return AE_BAD_PARAMETER;
                }