HAT_SYNC_STOPON_REF
pagesync_flag = HAT_SYNC_DONTZERO | HAT_SYNC_STOPON_REF |
#define HAT_SYNC_STOPON_RM (HAT_SYNC_STOPON_REF | HAT_SYNC_STOPON_MOD)
if ((flags & HAT_SYNC_STOPON_REF) != 0 && PP_ISREF(pp))
((flags & HAT_SYNC_STOPON_REF) && PP_ISREF(save_pp))) {
if ((clearflag & HAT_SYNC_STOPON_REF) && PP_ISREF(pp)) {
((clearflag & HAT_SYNC_STOPON_REF) && PP_ISREF(save_pp)))) {