xfs_group_max_blocks
ext.rc_startblock = xfs_group_max_blocks(cur->bc_group);
ext.rc_startblock = xfs_group_max_blocks(cur->bc_group);
if (xfs_group_max_blocks(xg) >= XFS_MAX_RGBLOCKS)
if (xfs_group_max_blocks(xg) > XFS_MAX_CRC_AG_BLOCKS)