xfs: precalculate inodes and blocks per inode cluster

Store the number of inodes and blocks per inode cluster in the mount
data so that we don't have to keep recalculating them.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

1 files changed, 6 insertions, 8 deletions

diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 18d8d3b812a7..942e4aa5e729 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -167,20 +167,18 @@ xfs_bulkstat_ichunk_ra(
 {
 	xfs_agblock_t			agbno;
 	struct blk_plug			plug;
-	int				blks_per_cluster;
-	int				inodes_per_cluster;
 	int				i;	/* inode chunk index */
 
 	agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
-	blks_per_cluster = xfs_icluster_size_fsb(mp);
-	inodes_per_cluster = XFS_FSB_TO_INO(mp, blks_per_cluster);
 
 	blk_start_plug(&plug);
 	for (i = 0; i < XFS_INODES_PER_CHUNK;
-	     i += inodes_per_cluster, agbno += blks_per_cluster) {
-		if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
-			xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
-					     &xfs_inode_buf_ops);
+	     i += mp->m_inodes_per_cluster, agbno += mp->m_blocks_per_cluster) {
+		if (xfs_inobt_maskn(i, mp->m_inodes_per_cluster) &
+		    ~irec->ir_free) {
+			xfs_btree_reada_bufs(mp, agno, agbno,
+					mp->m_blocks_per_cluster,
+					&xfs_inode_buf_ops);
 		}
 	}
 	blk_finish_plug(&plug);