20 struct journal_head {  struct
28 	 * [jbd_lock_bh_journal_head()]  argument
30 	int b_jcount;
39 	unsigned b_jlist;
46 	unsigned b_modified;
52 	char *b_frozen_data;
59 	char *b_committed_data;
84 	struct journal_head *b_tnext, *b_tprev;  argument
98 	struct journal_head *b_cpnext, *b_cpprev;  argument
101 	struct jbd2_buffer_trigger_type *b_triggers;
104 	struct jbd2_buffer_trigger_type *b_frozen_triggers;