[openeuler:OLK-6.6 3098/3098] net/oenetcls/oenetcls_main.c:990:13: warning: 'set_netdev_xps_queue' defined but not used

4 Nov 2025

      Hi Wang,

First bad commit (maybe != root cause):

tree:   https://gitee.com/openeuler/kernel.git OLK-6.6
head:   a29fc03bd0ddaf7388cf31604ef5bd9807585109
commit: 22d4075bf5ef29ba4b329f954ac28a7de1d69a65 [3098/3098] net/oenetcls: remove oenetcls trace hook
config: x86_64-randconfig-121-20251104 (https://download.01.org/0day-ci/archive/20251104/202511040552.16dcWFcA-lkp@i...)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251104/202511040552.16dcWFcA-lkp@i...)

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/202511040552.16dcWFcA-lkp@intel.com/

All warnings (new ones prefixed by >>):
...
...
net/oenetcls/oenetcls_main.c:990:13: warning: 'set_netdev_xps_queue' defined but not used [-Wunused-function]
     990 | static void set_netdev_xps_queue(bool enable)
         |             ^~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/string.h:294,
                    from include/linux/bitmap.h:11,
                    from include/linux/cpumask.h:12,
                    from arch/x86/include/asm/cpumask.h:5,
                    from arch/x86/include/asm/msr.h:11,
                    from arch/x86/include/asm/processor.h:23,
                    from arch/x86/include/asm/timex.h:5,
                    from include/linux/timex.h:67,
                    from include/linux/time32.h:13,
                    from include/linux/time.h:60,
                    from include/linux/stat.h:19,
                    from include/linux/module.h:13,
                    from net/oenetcls/oenetcls_main.c:2:
   In function 'strncpy',
       inlined from 'oecls_filter_restore' at net/oenetcls/oenetcls_main.c:459:2:
   include/linux/fortify-string.h:81:33: warning: '__builtin_strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
      81 | #define __underlying_strncpy    __builtin_strncpy
         |                                 ^
   include/linux/fortify-string.h:165:16: note: in expansion of macro '__underlying_strncpy'
     165 |         return __underlying_strncpy(p, q, size);
         |                ^~~~~~~~~~~~~~~~~~~~
   In function 'strncpy',
       inlined from 'oecls_filter_enable.constprop' at net/oenetcls/oenetcls_main.c:413:2:
   include/linux/fortify-string.h:81:33: warning: '__builtin_strncpy' specified bound 16 equals destination size [-Wstringop-truncation]
      81 | #define __underlying_strncpy    __builtin_strncpy
         |                                 ^
   include/linux/fortify-string.h:165:16: note: in expansion of macro '__underlying_strncpy'
     165 |         return __underlying_strncpy(p, q, size);
         |                ^~~~~~~~~~~~~~~~~~~~
Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for PTP_1588_CLOCK
   Depends on [n]: NET [=y] && POSIX_TIMERS [=n]
   Selected by [m]:
   - SXE [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_LINKDATA [=y] && (X86 [=y] || ARM64) && PCI [=y]
   - SXE_VF [=m] && NETDEVICES [=y] && ETHERNET [=y] && NET_VENDOR_LINKDATA [=y] && (X86 [=y] || ARM64) && PCI [=y]

vim +/set_netdev_xps_queue +990 net/oenetcls/oenetcls_main.c

4bed6ba0e88f50 Wang Liang 2025-08-26   989  
4bed6ba0e88f50 Wang Liang 2025-08-26  @990  static void set_netdev_xps_queue(bool enable)
4bed6ba0e88f50 Wang Liang 2025-08-26   991  {
4bed6ba0e88f50 Wang Liang 2025-08-26   992  	const struct cpumask clear_mask = { 0 };
4bed6ba0e88f50 Wang Liang 2025-08-26   993  	struct oecls_netdev_info *oecls_dev;
4bed6ba0e88f50 Wang Liang 2025-08-26   994  	const struct cpumask *cpu_mask;
4bed6ba0e88f50 Wang Liang 2025-08-26   995  	int rxq_id, devid, cpu, nid;
4bed6ba0e88f50 Wang Liang 2025-08-26   996  
4bed6ba0e88f50 Wang Liang 2025-08-26   997  	for_each_oecls_netdev(devid, oecls_dev) {
4bed6ba0e88f50 Wang Liang 2025-08-26   998  		for (rxq_id = 0; rxq_id < oecls_dev->rxq_num; rxq_id++) {
4bed6ba0e88f50 Wang Liang 2025-08-26   999  			cpu = oecls_dev->rxq[rxq_id].affinity_cpu;
4bed6ba0e88f50 Wang Liang 2025-08-26  1000  			nid = cpu_to_node(cpu);
4bed6ba0e88f50 Wang Liang 2025-08-26  1001  			if (enable)
4bed6ba0e88f50 Wang Liang 2025-08-26  1002  				cpu_mask = cpumask_of_node(nid);
4bed6ba0e88f50 Wang Liang 2025-08-26  1003  			else
4bed6ba0e88f50 Wang Liang 2025-08-26  1004  				cpu_mask = &clear_mask;
4bed6ba0e88f50 Wang Liang 2025-08-26  1005  
4bed6ba0e88f50 Wang Liang 2025-08-26  1006  			netif_set_xps_queue_wrapper(oecls_dev->netdev, rxq_id, cpu_mask);
4bed6ba0e88f50 Wang Liang 2025-08-26  1007  		}
4bed6ba0e88f50 Wang Liang 2025-08-26  1008  	}
4bed6ba0e88f50 Wang Liang 2025-08-26  1009  }
4bed6ba0e88f50 Wang Liang 2025-08-26  1010  

:::::: The code at line 990 was first introduced by commit
:::::: 4bed6ba0e88f50484fd5fb06bd993727b981b718 net/oenetcls: introduce oenetcls for network optimization

:::::: TO: Wang Liang <wangliang74@huawei.com>
:::::: CC: Wang Liang <wangliang74@huawei.com>

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