FOLD_MARK_IN_PROGRESS
if (foldmark == FOLD_MARK_IN_PROGRESS) {
oob.u.c.FoldMark = oob.u.c.FoldMark1 = cpu_to_le16(FOLD_MARK_IN_PROGRESS);
if (get_fold_mark(s, block) != FOLD_MARK_IN_PROGRESS ||
get_fold_mark(s, first_block) == FOLD_MARK_IN_PROGRESS) {
if (fold_mark == FOLD_MARK_IN_PROGRESS)