acpi_handle
acpi_handle handle;
__BUS_ACCESSOR(nvdimm_root, acpi_handle, NVDIMM_ROOT, ACPI_HANDLE, ACPI_HANDLE)
ACPI_HANDLE acpi_handle;
if (ACPI_FAILURE(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sc->acpi_handle))) {
if (sc->acpi_handle == NULL ||
ACPI_FAILURE(AcpiInstallAddressSpaceHandler(sc->acpi_handle,
sc->acpi_handle = NULL;
if (sc->acpi_handle != NULL)
AcpiRemoveAddressSpaceHandler(sc->acpi_handle,