1 files changed, 7 insertions, 2 deletions

diff --git a/fs/jbd/journal.c b/fs/jbd/journal.c
index 425c2f2cf170..a2862339323b 100644
--- a/fs/jbd/journal.c
+++ b/fs/jbd/journal.c
@@ -534,8 +534,8 @@ int journal_start_commit(journal_t *journal, tid_t *ptid)
                 ret = 1;
         } else if (journal->j_committing_transaction) {
                 /*
-                 * If ext3_write_super() recently started a commit, then we
-                 * have to wait for completion of that transaction
+                 * If commit has been started, then we have to wait for
+                 * completion of that transaction.
                  */
                 if (ptid)
                         *ptid = journal->j_committing_transaction->t_tid;
@@ -1113,6 +1113,11 @@ static void mark_journal_empty(journal_t *journal)
 
         BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
         spin_lock(&journal->j_state_lock);
+        /* Is it already empty? */
+        if (sb->s_start == 0) {
+                spin_unlock(&journal->j_state_lock);
+                return;
+        }
         jbd_debug(1, "JBD: Marking journal as empty (seq %d)\n",
                   journal->j_tail_sequence);