19 struct journal_head {  struct
27 	 * [jbd_lock_bh_journal_head()]  argument
29 	int b_jcount;
38 	unsigned b_jlist;
45 	unsigned b_modified;
51 	char *b_frozen_data;
58 	char *b_committed_data;
83 	struct journal_head *b_tnext, *b_tprev;  argument
97 	struct journal_head *b_cpnext, *b_cpprev;  argument
100 	struct jbd2_buffer_trigger_type *b_triggers;
103 	struct jbd2_buffer_trigger_type *b_frozen_triggers;