acpi_device_dir
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), acpi_lid_dir);
if (!acpi_device_dir(device)) {
acpi_device_dir(device), acpi_button_state_seq_show,
acpi_device_dir(device) = NULL;
acpi_device_dir(device));
acpi_device_dir(device) = NULL;
struct acpi_device_dir dir;