xfs_buf_poff      290 fs/xfs/linux-2.6/xfs_buf.c 		bp->b_offset = xfs_buf_poff(bp->b_file_offset);
xfs_buf_poff     1312 fs/xfs/linux-2.6/xfs_buf.c 		cpoff = xfs_buf_poff(boff + bp->b_offset);