ACPI_AML_IN_KERN
ret = !__acpi_aml_access_ok(ACPI_AML_IN_KERN) ||
__acpi_aml_readable(&acpi_aml_io.in_crc, ACPI_AML_IN_KERN);
ret = acpi_aml_lock_read(crc, ACPI_AML_IN_KERN);
acpi_aml_unlock_fifo(ACPI_AML_IN_KERN, true);
#define ACPI_AML_KERN (ACPI_AML_IN_KERN | ACPI_AML_OUT_KERN)