T_WANTSYNC
if (ti->flags & T_WANTSYNC) {
if (ti->flags & T_WANTSYNC) {
ti->flags |= T_WANTSYNC;
if (!(ti->flags & T_WANTSYNC))
if (ti->flags & T_WANTSYNC) {
if (ti->flags & T_WANTSYNC)
ti->flags &= ~T_WANTSYNC;
ti->flags |= T_WANTSYNC;
if (!(ti->flags & T_WANTSYNC) == !(ti->flags & T_SYNCMODE))