ACPI_TASK_USED
if (atomic_cmpset_int(&acpi_tasks[i].at_flag, ACPI_TASK_USED,
ACPI_TASK_USED | ACPI_TASK_ENQUEUED))
atomic_clear_int(&at->at_flag, ACPI_TASK_USED | ACPI_TASK_ENQUEUED);
ACPI_TASK_USED)) {