ocfs2: use system_wq instead of ocfs2_quota_wq

ocfs2_quota_wq is not depended upon during memory reclaim and, with
cmwq, there's no reason to use a dedicated workqueue.  Drop
ocfs2_quota_wq and use system_wq instead.  dqi_sync_work is already
sync canceled on quota disable and no further synchronization is
necessary.

This change makes ocfs2_quota_setup/shutdown() noops.  Both functions
removed.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <joel.becker@oracle.com>

1 files changed, 4 insertions, 23 deletions

diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 4607923eb24c..a73f64166481 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -63,8 +63,6 @@
  *        write to gf
  */
 
-static struct workqueue_struct *ocfs2_quota_wq = NULL;
-
 static void qsync_work_fn(struct work_struct *work);
 
 static void ocfs2_global_disk2memdqb(struct dquot *dquot, void *dp)
@@ -400,8 +398,8 @@ int ocfs2_global_read_info(struct super_block *sb, int type)
                                                 OCFS2_QBLK_RESERVED_SPACE;
         oinfo->dqi_gi.dqi_qtree_depth = qtree_depth(&oinfo->dqi_gi);
         INIT_DELAYED_WORK(&oinfo->dqi_sync_work, qsync_work_fn);
-        queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
-                           msecs_to_jiffies(oinfo->dqi_syncms));
+        schedule_delayed_work(&oinfo->dqi_sync_work,
+                              msecs_to_jiffies(oinfo->dqi_syncms));
 
 out_err:
         mlog_exit(status);
@@ -635,8 +633,8 @@ static void qsync_work_fn(struct work_struct *work)
         struct super_block *sb = oinfo->dqi_gqinode->i_sb;
 
         dquot_scan_active(sb, ocfs2_sync_dquot_helper, oinfo->dqi_type);
-        queue_delayed_work(ocfs2_quota_wq, &oinfo->dqi_sync_work,
-                           msecs_to_jiffies(oinfo->dqi_syncms));
+        schedule_delayed_work(&oinfo->dqi_sync_work,
+                              msecs_to_jiffies(oinfo->dqi_syncms));
 }
 
 /*
@@ -923,20 +921,3 @@ const struct dquot_operations ocfs2_quota_operations = {
         .alloc_dquot    = ocfs2_alloc_dquot,
         .destroy_dquot  = ocfs2_destroy_dquot,
 };
-
-int ocfs2_quota_setup(void)
-{
-        ocfs2_quota_wq = create_workqueue("o2quot");
-        if (!ocfs2_quota_wq)
-                return -ENOMEM;
-        return 0;
-}
-
-void ocfs2_quota_shutdown(void)
-{
-        if (ocfs2_quota_wq) {
-                flush_workqueue(ocfs2_quota_wq);
-                destroy_workqueue(ocfs2_quota_wq);
-                ocfs2_quota_wq = NULL;
-        }
-}