linux-kernel - [PATCH 5.15 022/201] xfs: fold perag loop iteration logic into helper function

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Date:   Wed, 27 Jul 2022 18:08:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Brian Foster <bfoster@...hat.com>,
        Dave Chinner <dchinner@...hat.com>,
        "Darrick J. Wong" <djwong@...nel.org>,
        Leah Rumancik <leah.rumancik@...il.com>
Subject: [PATCH 5.15 022/201] xfs: fold perag loop iteration logic into helper function

From: Brian Foster <bfoster@...hat.com>

[ Upstream commit bf2307b195135ed9c95eebb38920d8bd41843092 ]

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

[backport: dependency for f1788b5e5ee25bedf00bb4d25f82b93820d61189]

Signed-off-by: Brian Foster <bfoster@...hat.com>
Reviewed-by: Dave Chinner <dchinner@...hat.com>
Reviewed-by: Darrick J. Wong <djwong@...nel.org>
Signed-off-by: Darrick J. Wong <djwong@...nel.org>
Signed-off-by: Leah Rumancik <leah.rumancik@...il.com>
Acked-by: Darrick J. Wong <djwong@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/xfs/libxfs/xfs_ag.h |   16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

--- a/fs/xfs/libxfs/xfs_ag.h
+++ b/fs/xfs/libxfs/xfs_ag.h
@@ -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))