xfs: remove unused m_data_workqueue

Now that we're no longer using m_data_workqueue, remove it.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

fs/xfs/xfs_mount.h

@@ -189,7 +189,6 @@ typedef struct xfs_mount {
 	struct xstats		m_stats;	/* per-fs stats */
 
 	struct workqueue_struct *m_buf_workqueue;
-	struct workqueue_struct	*m_data_workqueue;
 	struct workqueue_struct	*m_unwritten_workqueue;
 	struct workqueue_struct	*m_cil_workqueue;
 	struct workqueue_struct	*m_reclaim_workqueue;

fs/xfs/xfs_super.c

@@ -838,15 +838,10 @@ xfs_init_mount_workqueues(
 	if (!mp->m_buf_workqueue)
 		goto out;
 
-	mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
-			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
-	if (!mp->m_data_workqueue)
-		goto out_destroy_buf;
-
 	mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
 			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 	if (!mp->m_unwritten_workqueue)
-		goto out_destroy_data_iodone_queue;
+		goto out_destroy_buf;
 
 	mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
 			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
@@ -886,8 +881,6 @@ xfs_init_mount_workqueues(
 	destroy_workqueue(mp->m_cil_workqueue);
 out_destroy_unwritten:
 	destroy_workqueue(mp->m_unwritten_workqueue);
-out_destroy_data_iodone_queue:
-	destroy_workqueue(mp->m_data_workqueue);
 out_destroy_buf:
 	destroy_workqueue(mp->m_buf_workqueue);
 out:
@@ -903,7 +896,6 @@ xfs_destroy_mount_workqueues(
 	destroy_workqueue(mp->m_log_workqueue);
 	destroy_workqueue(mp->m_reclaim_workqueue);
 	destroy_workqueue(mp->m_cil_workqueue);
-	destroy_workqueue(mp->m_data_workqueue);
 	destroy_workqueue(mp->m_unwritten_workqueue);
 	destroy_workqueue(mp->m_buf_workqueue);
 }