[GFS2] Add an additional argument to gfs2_trans_add_bh()

This adds an extra argument to gfs2_trans_add_bh() to indicate whether the
bh being added to the transaction is metadata or data. Its currently unused
since all existing callers set it to 1 (metadata) but following patches will
make use of it.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index d37f203..cab7ab5 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -608,7 +608,7 @@
 		return;
 
 	down(&sdp->sd_statfs_mutex);
-	gfs2_trans_add_bh(l_ip->i_gl, l_bh);
+	gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
 	up(&sdp->sd_statfs_mutex);
 
 	spin_lock(&sdp->sd_statfs_spin);
@@ -659,7 +659,7 @@
 		goto out_bh2;
 
 	down(&sdp->sd_statfs_mutex);
-	gfs2_trans_add_bh(l_ip->i_gl, l_bh);
+	gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
 	up(&sdp->sd_statfs_mutex);
 
 	spin_lock(&sdp->sd_statfs_spin);
@@ -671,7 +671,7 @@
 	       0, sizeof(struct gfs2_statfs_change));
 	spin_unlock(&sdp->sd_statfs_spin);
 
-	gfs2_trans_add_bh(m_ip->i_gl, m_bh);
+	gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
 	gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
 
 	gfs2_trans_end(sdp);