jbd2_journal_errno 2910 fs/ext4/super.c 	j_errno = jbd2_journal_errno(journal);
jbd2_journal_errno  717 fs/ocfs2/journal.c 	olderr = jbd2_journal_errno(journal);
jbd2_journal_errno 1073 include/linux/jbd2.h extern int	   jbd2_journal_errno      (journal_t *);