XEON_SBAR23SZ_OFFSET
pci_write_config_byte(pdev, XEON_SBAR23SZ_OFFSET, bar_sz);
pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &bar_sz);
pci_read_config_byte(pdev, XEON_SBAR23SZ_OFFSET, &u.v8);