def block_device_mapping_update(context, bdm_id, values, legacy=True):
    return IMPL.block_device_mapping_update(context, bdm_id, values, legacy)
Update an entry of block device mapping.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/db/api.py/block_device_mapping_update