TSTORM_TCP_ST_CONTEXT_SECTION_RTT_VARIATION_SHIFT
ttcp_st->flags2 |= (sm_delta << TSTORM_TCP_ST_CONTEXT_SECTION_RTT_VARIATION_SHIFT); /* given in ticks, no conversion is required */
>> TSTORM_TCP_ST_CONTEXT_SECTION_RTT_VARIATION_SHIFT;