1 files changed, 8 insertions, 1 deletions

diff --git a/fs/jbd/commit.c b/fs/jbd/commit.c
index 1b27f46e6108..52c15c776029 100644
--- a/fs/jbd/commit.c
+++ b/fs/jbd/commit.c
@@ -309,7 +309,14 @@ void journal_commit_transaction(journal_t *journal)
         if (journal->j_flags & JFS_FLUSHED) {
                 jbd_debug(3, "super block updated\n");
                 mutex_lock(&journal->j_checkpoint_mutex);
-                journal_update_sb_log_tail(journal);
+                /*
+                 * We hold j_checkpoint_mutex so tail cannot change under us.
+                 * We don't need any special data guarantees for writing sb
+                 * since journal is empty and it is ok for write to be
+                 * flushed only with transaction commit.
+                 */
+                journal_update_sb_log_tail(journal, journal->j_tail_sequence,
+                                           journal->j_tail, WRITE_SYNC);
                 mutex_unlock(&journal->j_checkpoint_mutex);
         } else {
                 jbd_debug(3, "superblock not updated\n");