xfs_perag_next_range
return xfs_perag_next_range(mp, pag, start_agno, mp->m_sb.sb_agcount - 1);
while ((pag = xfs_perag_next_range(mp, pag, start_agno, end_agno))) {
while ((pag = xfs_perag_next_range(mp, pag, start_ag, end_ag))) {