def block_device_mapping_update(context, bdm_id, values, legacy=True):
 return IMPL.block_device_mapping_update(context, bdm_id, values, legacy)

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 .