[zen:6.13/bbr3 1/1] net/ipv4/tcp_bbr.c:2042:17: warning: variable 'round_delivered' set but not used

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

tree:   https://github.com/zen-kernel/zen-kernel 6.13/bbr3
head:   aa2658ab3fba8f0f16c6d9c838776502980974ed
commit: aa2658ab3fba8f0f16c6d9c838776502980974ed [1/1] tcp/bbr3: initial import
config: arc-randconfig-001-20250123 (https://download.01.org/0day-ci/archive/20250123/202501232307.PyIqUnCG-lkp@intel.com/config)
compiler: arceb-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250123/202501232307.PyIqUnCG-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/202501232307.PyIqUnCG-lkp@intel.com/

All warnings (new ones prefixed by >>):

   net/ipv4/tcp_bbr.c: In function 'bbr_main':
>> net/ipv4/tcp_bbr.c:2042:17: warning: variable 'round_delivered' set but not used [-Wunused-but-set-variable]
    2042 |         u32 bw, round_delivered;
         |                 ^~~~~~~~~~~~~~~


vim +/round_delivered +2042 net/ipv4/tcp_bbr.c

  2035	
  2036	__bpf_kfunc static void bbr_main(struct sock *sk, u32 ack, int flag, const struct rate_sample *rs)
  2037	{
  2038		struct tcp_sock *tp = tcp_sk(sk);
  2039		struct bbr *bbr = inet_csk_ca(sk);
  2040		struct bbr_context ctx = { 0 };
  2041		bool update_model = true;
> 2042		u32 bw, round_delivered;
  2043		int ce_ratio = -1;
  2044	
  2045		round_delivered = bbr_update_round_start(sk, rs, &ctx);
  2046		if (bbr->round_start) {
  2047			bbr->rounds_since_probe =
  2048				min_t(s32, bbr->rounds_since_probe + 1, 0xFF);
  2049			ce_ratio = bbr_update_ecn_alpha(sk);
  2050		}
  2051		bbr_plb(sk, rs, ce_ratio);
  2052	
  2053		bbr->ecn_in_round  |= (bbr->ecn_eligible && rs->is_ece);
  2054		bbr_calculate_bw_sample(sk, rs, &ctx);
  2055		bbr_update_latest_delivery_signals(sk, rs, &ctx);
  2056	
  2057		if (bbr_run_fast_path(sk, &update_model, rs, &ctx))
  2058			goto out;
  2059	
  2060		if (update_model)
  2061			bbr_update_model(sk, rs, &ctx);
  2062	
  2063		bbr_update_gains(sk);
  2064		bw = bbr_bw(sk);
  2065		bbr_set_pacing_rate(sk, bw, bbr->pacing_gain);
  2066		bbr_set_cwnd(sk, rs, rs->acked_sacked, bw, bbr->cwnd_gain,
  2067			     tcp_snd_cwnd(tp), &ctx);
  2068		bbr_bound_cwnd_for_inflight_model(sk);
  2069	
  2070	out:
  2071		bbr_advance_latest_delivery_signals(sk, rs, &ctx);
  2072		bbr->prev_ca_state = inet_csk(sk)->icsk_ca_state;
  2073		bbr->loss_in_cycle |= rs->lost > 0;
  2074		bbr->ecn_in_cycle  |= rs->delivered_ce > 0;
  2075	}
  2076	

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