ocfs2: clean up some osb fields

Get rid of osb->uuid, osb->proc_sub_dir, and osb->osb_id. Those fields were
unused, or could easily be removed. As a result, we also no longer need
MAX_OSB_ID or ocfs2_globals_lock.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 910a601..f92bf1d 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -784,8 +784,7 @@
 	}
 
 	/* Launch the commit thread */
-	osb->commit_task = kthread_run(ocfs2_commit_thread, osb, "ocfs2cmt-%d",
-				       osb->osb_id);
+	osb->commit_task = kthread_run(ocfs2_commit_thread, osb, "ocfs2cmt");
 	if (IS_ERR(osb->commit_task)) {
 		status = PTR_ERR(osb->commit_task);
 		osb->commit_task = NULL;
@@ -1118,7 +1117,7 @@
 		goto out;
 
 	osb->recovery_thread_task =  kthread_run(__ocfs2_recovery_thread, osb,
-						 "ocfs2rec-%d", osb->osb_id);
+						 "ocfs2rec");
 	if (IS_ERR(osb->recovery_thread_task)) {
 		mlog_errno((int)PTR_ERR(osb->recovery_thread_task));
 		osb->recovery_thread_task = NULL;