RB_ADD_STAMP_FORCE
(RB_ADD_STAMP_FORCE | RB_ADD_STAMP_ABSOLUTE);
(RB_ADD_STAMP_FORCE | RB_ADD_STAMP_ABSOLUTE)) {
info->add_timestamp |= RB_ADD_STAMP_FORCE | RB_ADD_STAMP_EXTEND;
(RB_ADD_STAMP_FORCE | RB_ADD_STAMP_ABSOLUTE))))
info->add_timestamp &= ~RB_ADD_STAMP_FORCE;
(RB_ADD_STAMP_FORCE | RB_ADD_STAMP_ABSOLUTE))))
if (info.add_timestamp & (RB_ADD_STAMP_FORCE | RB_ADD_STAMP_EXTEND))