Re: [PATCH net-next v10 2/2] selftests: net: add local ECMP rehash test

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

Hi Neil,

kernel test robot noticed the following build errors:

[auto build test ERROR on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Neil-Spring/tcp-rehash-onto-different-local-ECMP-path-on-retransmit-timeout/20260530-005334
base:   net-next/main
patch link:    https://lore.kernel.org/r/20260529160136.1010064-3-ntspring%40meta.com
patch subject: [PATCH net-next v10 2/2] selftests: net: add local ECMP rehash test
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260530/202605301121.q28WSYib-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260530/202605301121.q28WSYib-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/202605301121.q28WSYib-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/net/slip/slhc.c:74:
>> include/net/tcp.h:2557:2: error: call to undeclared function 'tcp_synq_overflow'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2557 |         tcp_synq_overflow(sk);
         |         ^
   1 error generated.
--
   In file included from drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c:48:
>> include/net/tcp.h:2557:2: error: call to undeclared function 'tcp_synq_overflow'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    2557 |         tcp_synq_overflow(sk);
         |         ^
   drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c:15197:26: warning: shift count >= width of type [-Wshift-count-overflow]
    15197 |         bp->cyclecounter.mask = CYCLECOUNTER_MASK(64);
          |                                 ^~~~~~~~~~~~~~~~~~~~~
   include/linux/timecounter.h:14:59: note: expanded from macro 'CYCLECOUNTER_MASK'
      14 | #define CYCLECOUNTER_MASK(bits) (u64)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)
         |                                                           ^ ~~~~~~
   1 warning and 1 error generated.


vim +/tcp_synq_overflow +2557 include/net/tcp.h

  2554	
  2555	static inline void cookie_record_sent(const struct sock *sk)
  2556	{
> 2557		tcp_synq_overflow(sk);
  2558		__NET_INC_STATS(sock_net(sk), LINUX_MIB_SYNCOOKIESSENT);
  2559	}
  2560	

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