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xfs: fold perag loop iteration logic into helper function 

Fold the loop iteration logic into a helper in preparation for
further fixups. No functional change in this patch.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
This commit is contained in:
Brian Foster 2021-10-14 12:56:08 -07:00 committed by Darrick J. Wong
parent 53eb47b491
commit bf2307b195
1 changed files with 13 additions and 3 deletions
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16
fs/xfs/libxfs/xfs_ag.h
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@ -124,12 +124,22 @@ void xfs_perag_put(struct xfs_perag *pag);
* for_each_perag_from() because they terminate at sb_agcount where there are
* no perag structures in tree beyond end_agno.
*/
static inline struct xfs_perag *
xfs_perag_next(
struct xfs_perag *pag,
xfs_agnumber_t *next_agno)
{
struct xfs_mount *mp = pag->pag_mount;
*next_agno = pag->pag_agno + 1;
xfs_perag_put(pag);
return xfs_perag_get(mp, *next_agno);
}
#define for_each_perag_range(mp, next_agno, end_agno, pag) \
for ((pag) = xfs_perag_get((mp), (next_agno)); \
(pag) != NULL && (next_agno) <= (end_agno); \
(next_agno) = (pag)->pag_agno + 1, \
xfs_perag_put(pag), \
(pag) = xfs_perag_get((mp), (next_agno)))
(pag) = xfs_perag_next((pag), &(next_agno)))
#define for_each_perag_from(mp, next_agno, pag) \
for_each_perag_range((mp), (next_agno), (mp)->m_sb.sb_agcount, (pag))