netdev - Re: [PATCH net-next 01/10] net/smc: remove locks smc_client_lgr_pending and smc_server_lgr

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Date:   Thu, 11 Aug 2022 11:41:08 +0800
From:   kernel test robot <lkp@...el.com>
To:     "D. Wythe" <alibuda@...ux.alibaba.com>, kgraul@...ux.ibm.com,
        wenjia@...ux.ibm.com
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org, kuba@...nel.org,
        davem@...emloft.net, netdev@...r.kernel.org,
        linux-s390@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [PATCH net-next 01/10] net/smc: remove locks
 smc_client_lgr_pending and smc_server_lgr_pending

Hi Wythe",

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/D-Wythe/net-smc-optimize-the-parallelism-of-SMC-R-connections/20220811-014942
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git f86d1fbbe7858884d6754534a0afbb74fc30bc26
config: i386-randconfig-a013 (https://download.01.org/0day-ci/archive/20220811/202208111145.LdpP76au-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 5f1c7e2cc5a3c07cbc2412e851a7283c1841f520)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/2c1c2e644fb8dbce9b8a004e604792340cbfccb8
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review D-Wythe/net-smc-optimize-the-parallelism-of-SMC-R-connections/20220811-014942
        git checkout 2c1c2e644fb8dbce9b8a004e604792340cbfccb8
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash net/smc/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> net/smc/smc_core.c:95:30: warning: operator '?:' has lower precedence than '+'; '+' will be evaluated first [-Wparentheses]
                   + (lnkc->role == SMC_SERV) ? 0 : lnkc->clcqpn;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~~ ^
   net/smc/smc_core.c:95:30: note: place parentheses around the '+' expression to silence this warning
                   + (lnkc->role == SMC_SERV) ? 0 : lnkc->clcqpn;
                                              ^
                                             )
   net/smc/smc_core.c:95:30: note: place parentheses around the '?:' expression to evaluate it first
                   + (lnkc->role == SMC_SERV) ? 0 : lnkc->clcqpn;
                                              ^
                     (                                          )
   net/smc/smc_core.c:104:29: warning: operator '?:' has lower precedence than '+'; '+' will be evaluated first [-Wparentheses]
                   + (key->role == SMC_SERV) ? 0 : key->clcqpn;
                   ~~~~~~~~~~~~~~~~~~~~~~~~~ ^
   net/smc/smc_core.c:104:29: note: place parentheses around the '+' expression to silence this warning
                   + (key->role == SMC_SERV) ? 0 : key->clcqpn;
                                             ^
                                            )
   net/smc/smc_core.c:104:29: note: place parentheses around the '?:' expression to evaluate it first
                   + (key->role == SMC_SERV) ? 0 : key->clcqpn;
                                             ^
                     (                                        )
   2 warnings generated.


vim +95 net/smc/smc_core.c

    88	
    89	/* SMC-R lnk cluster hash func */
    90	static u32 smcr_lnk_cluster_hashfn(const void *data, u32 len, u32 seed)
    91	{
    92		const struct smc_lnk_cluster *lnkc = data;
    93	
    94		return jhash2((u32 *)lnkc->peer_systemid, SMC_SYSTEMID_LEN / sizeof(u32), seed)
  > 95			+ (lnkc->role == SMC_SERV) ? 0 : lnkc->clcqpn;
    96	}
    97	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp