[zen:7.2/bbr3 1/2] net/ipv4/tcp_bbr3.c:2051:17: warning: variable 'round_delivered' set but not used

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/zen-kernel/zen-kernel 7.2/bbr3
head:   f04474ac60538e992f6c6cf854e0fda08632e2da
commit: f7f00444a9ad2284192bfa6aaef7ce9be2d43388 [1/2] tcp/bbr3: add BBRv3 congestion control
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20260829/202608290804.uQTc6zeR-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260829/202608290804.uQTc6zeR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608290804.uQTc6zeR-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/ipv4/tcp_bbr3.c: In function 'bbr_main':
>> net/ipv4/tcp_bbr3.c:2051:17: warning: variable 'round_delivered' set but not used [-Wunused-but-set-variable=]
    2051 |         u32 bw, round_delivered;
         |                 ^~~~~~~~~~~~~~~


vim +/round_delivered +2051 net/ipv4/tcp_bbr3.c

  2043	
  2044	__bpf_kfunc static void bbr_main(struct sock *sk, u32 ack, int flag,
  2045					 const struct rate_sample *rs)
  2046	{
  2047		struct tcp_sock *tp = tcp_sk(sk);
  2048		struct bbr *bbr = inet_csk_ca(sk);
  2049		struct bbr_context ctx = { 0 };
  2050		bool update_model = true;
> 2051		u32 bw, round_delivered;
  2052		int ce_ratio = -1;
  2053	
  2054		round_delivered = bbr_update_round_start(sk, rs, &ctx);
  2055		if (bbr->round_start) {
  2056			bbr->rounds_since_probe =
  2057				min_t(s32, bbr->rounds_since_probe + 1, 0xFF);
  2058			ce_ratio = bbr_update_ecn_alpha(sk);
  2059		}
  2060		bbr_plb(sk, rs, ce_ratio);
  2061	
  2062		bbr->ecn_in_round  |= (bbr->ecn_eligible && rs->is_ece);
  2063		bbr_calculate_bw_sample(sk, rs, &ctx);
  2064		bbr_update_latest_delivery_signals(sk, rs, &ctx);
  2065	
  2066		if (bbr_run_fast_path(sk, &update_model, rs, &ctx))
  2067			goto out;
  2068	
  2069		if (update_model)
  2070			bbr_update_model(sk, rs, &ctx);
  2071	
  2072		bbr_update_gains(sk);
  2073		bw = bbr_bw(sk);
  2074		bbr_set_pacing_rate(sk, bw, bbr->pacing_gain);
  2075		bbr_set_cwnd(sk, rs, rs->acked_sacked, bw, bbr->cwnd_gain,
  2076			     tcp_snd_cwnd(tp), &ctx);
  2077		bbr_bound_cwnd_for_inflight_model(sk);
  2078	
  2079	out:
  2080		bbr_advance_latest_delivery_signals(sk, rs, &ctx);
  2081		bbr->prev_ca_state = inet_csk(sk)->icsk_ca_state;
  2082		bbr->loss_in_cycle |= rs->lost > 0;
  2083		bbr->ecn_in_cycle  |= rs->delivered_ce > 0;
  2084	}
  2085	

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