journal_grab_journal_head 1737 fs/jbd/transaction.c jh = journal_grab_journal_head(bh); journal_grab_journal_head 1875 fs/jbd/transaction.c jh = journal_grab_journal_head(bh); journal_grab_journal_head 927 include/linux/jbd.h struct journal_head *journal_grab_journal_head(struct buffer_head *bh);