[zen:6.5/bbr3 1/1] net/ipv4/tcp_bbr.c:1315:5: warning: no previous prototype for 'bbr_ecn_cut'

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

tree:   https://github.com/zen-kernel/zen-kernel 6.5/bbr3
head:   bcb27e4adacda606c76349bfba3305db6ea83887
commit: bcb27e4adacda606c76349bfba3305db6ea83887 [1/1] bbr3-6.5: initial import
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20230829/202308290834.BxWjxgec-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230829/202308290834.BxWjxgec-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/202308290834.BxWjxgec-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> net/ipv4/tcp_bbr.c:1315:5: warning: no previous prototype for 'bbr_ecn_cut' [-Wmissing-prototypes]
    1315 | u32 bbr_ecn_cut(struct sock *sk)
         |     ^~~~~~~~~~~
>> net/ipv4/tcp_bbr.c:2036:18: warning: no previous prototype for 'bbr_main' [-Wmissing-prototypes]
    2036 | __bpf_kfunc void bbr_main(struct sock *sk, const struct rate_sample *rs)
         |                  ^~~~~~~~
   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 +/bbr_ecn_cut +1315 net/ipv4/tcp_bbr.c

  1313	
  1314	/* How should we multiplicatively cut bw or inflight limits based on ECN? */
> 1315	u32 bbr_ecn_cut(struct sock *sk)
  1316	{
  1317		struct bbr *bbr = inet_csk_ca(sk);
  1318	
  1319		return BBR_UNIT -
  1320			((bbr->ecn_alpha * bbr_param(sk, ecn_factor)) >> BBR_SCALE);
  1321	}
  1322	

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