xfs: redefine xfs_ictimestamp_t

Redefine xfs_ictimestamp_t as a uint64_t typedef in preparation for the
bigtime functionality.  Preserve the legacy structure format so that we
can let the compiler take care of the masking and shifting.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Gao Xiang <hsiangkao@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
diff --git a/fs/xfs/xfs_inode_item_recover.c b/fs/xfs/xfs_inode_item_recover.c
index 03fab43..4e895c9 100644
--- a/fs/xfs/xfs_inode_item_recover.c
+++ b/fs/xfs/xfs_inode_item_recover.c
@@ -121,11 +121,13 @@ xfs_log_dinode_to_disk_ts(
 	const xfs_ictimestamp_t		its)
 {
 	struct xfs_legacy_timestamp	*lts;
+	struct xfs_legacy_ictimestamp	*lits;
 	xfs_timestamp_t			ts;
 
 	lts = (struct xfs_legacy_timestamp *)&ts;
-	lts->t_sec = cpu_to_be32(its.t_sec);
-	lts->t_nsec = cpu_to_be32(its.t_nsec);
+	lits = (struct xfs_legacy_ictimestamp *)&its;
+	lts->t_sec = cpu_to_be32(lits->t_sec);
+	lts->t_nsec = cpu_to_be32(lits->t_nsec);
 
 	return ts;
 }