diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c
index dcd2f93b6a6c..0c5f0548021f 100644
--- a/fs/xfs/libxfs/xfs_ag.c
+++ b/fs/xfs/libxfs/xfs_ag.c
@@ -866,7 +866,7 @@ xfs_ag_shrink_space(
 void
 xfs_growfs_compute_deltas(
 	struct xfs_mount	*mp,
-	xfs_rfsblock_t		nb,
+	xfs_rfsblock_t		*nb,
 	int64_t			*deltap,
 	xfs_agnumber_t		*nagcountp)
 {
@@ -874,19 +874,19 @@ xfs_growfs_compute_deltas(
 	int64_t		delta;
 	xfs_agnumber_t	nagcount;
 
-	nb_div = nb;
+	nb_div = *nb;
 	nb_mod = do_div(nb_div, mp->m_sb.sb_agblocks);
 	if (nb_mod && nb_mod >= XFS_MIN_AG_BLOCKS)
 		nb_div++;
 	else if (nb_mod)
-		nb = nb_div * mp->m_sb.sb_agblocks;
+		*nb = nb_div * mp->m_sb.sb_agblocks;
 
 	if (nb_div > XFS_MAX_AGNUMBER + 1) {
 		nb_div = XFS_MAX_AGNUMBER + 1;
-		nb = nb_div * mp->m_sb.sb_agblocks;
+		*nb = nb_div * mp->m_sb.sb_agblocks;
 	}
 	nagcount = nb_div;
-	delta = nb - mp->m_sb.sb_dblocks;
+	delta = *nb - mp->m_sb.sb_dblocks;
 	*deltap = delta;
 	*nagcountp = nagcount;
 }
diff --git a/fs/xfs/libxfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h
index 16a9b43a3c27..8aa4266c5571 100644
--- a/fs/xfs/libxfs/xfs_ag.h
+++ b/fs/xfs/libxfs/xfs_ag.h
@@ -330,7 +330,7 @@ int xfs_ag_init_headers(struct xfs_mount *mp, struct aghdr_init_data *id);
 int xfs_ag_shrink_space(struct xfs_perag *pag, struct xfs_trans **tpp,
 			xfs_extlen_t delta);
 void
-xfs_growfs_compute_deltas(struct xfs_mount *mp, xfs_rfsblock_t nb,
+xfs_growfs_compute_deltas(struct xfs_mount *mp, xfs_rfsblock_t *nb,
 			int64_t *deltap, xfs_agnumber_t *nagcountp);
 int xfs_ag_extend_space(struct xfs_perag *pag, struct xfs_trans *tp,
 			xfs_extlen_t len);
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 8d64d904d73c..436857356a0a 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -124,7 +124,7 @@ xfs_growfs_data_private(
 			mp->m_sb.sb_rextsize);
 	if (error)
 		return error;
-	xfs_growfs_compute_deltas(mp, nb, &delta, &nagcount);
+	xfs_growfs_compute_deltas(mp, &nb, &delta, &nagcount);
 
 	/*
 	 * Reject filesystems with a single AG because they are not