xfs: precalculate cluster alignment in inodes and blocks

Store the inode cluster alignment information in units of inodes and
blocks 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>

fs/xfs/scrub/ialloc.c

@@ -300,7 +300,7 @@ xchk_iallocbt_rec(
 
 	/* Make sure this record is aligned to cluster and inoalignmnt size. */
 	agbno = XFS_AGINO_TO_AGBNO(mp, irec.ir_startino);
-	if ((agbno & (xfs_ialloc_cluster_alignment(mp) - 1)) ||
+	if ((agbno & (mp->m_cluster_align - 1)) ||
 	    (agbno & (mp->m_blocks_per_cluster - 1)))
 		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);