jbd2_journal_grab_journal_head
jbd2_journal_grab_journal_head(jh2bh(jh));
EXPORT_SYMBOL(jbd2_journal_grab_journal_head);
struct journal_head *jh = jbd2_journal_grab_journal_head(bh);
jh = jbd2_journal_grab_journal_head(bh);
jh = jbd2_journal_grab_journal_head(bh);
jh = jbd2_journal_grab_journal_head(bh);
jbd2_journal_grab_journal_head(bh);
jh = jbd2_journal_grab_journal_head(bg_bh);
struct journal_head *jbd2_journal_grab_journal_head(struct buffer_head *bh);