tree: https://github.com/dsahern/linux xdp/devmap-prog head: b29da7596f8eaf356dea9b80b5271d50a2492cb7 commit: b3250f63529680518242eeaf9b12f3f97d134cdc [2/4] bpf: Add support to attach bpf program to a devmap config: powerpc-ps3_defconfig (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout b3250f63529680518242eeaf9b12f3f97d134cdc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): net/core/dev.c: In function 'generic_xdp_install': 5420 | if (dev_map_can_have_prog(new->aux->used_maps[i])) | ^~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/dev_map_can_have_prog +5420 net/core/dev.c 5406 5407 static int generic_xdp_install(struct net_device *dev, struct netdev_bpf *xdp) 5408 { 5409 struct bpf_prog *old = rtnl_dereference(dev->xdp_prog); 5410 struct bpf_prog *new = xdp->prog; 5411 int ret = 0; 5412 5413 if (new) { 5414 u32 i; 5415 5416 /* generic XDP does not work with DEVMAPs that can 5417 * have a bpf_prog installed 5418 */ 5419 for (i = 0; i < new->aux->used_map_cnt; i++) { 5421 return -EINVAL; 5422 } 5423 } 5424 5425 switch (xdp->command) { 5426 case XDP_SETUP_PROG: 5427 rcu_assign_pointer(dev->xdp_prog, new); 5428 if (old) 5429 bpf_prog_put(old); 5430 5431 if (old && !new) { 5432 static_branch_dec(&generic_xdp_needed_key); 5433 } else if (new && !old) { 5434 static_branch_inc(&generic_xdp_needed_key); 5435 dev_disable_lro(dev); 5436 dev_disable_gro_hw(dev); 5437 } 5438 break; 5439 5440 case XDP_QUERY_PROG: 5441 xdp->prog_id = old ? old->aux->id : 0; 5442 break; 5443 5444 default: 5445 ret = -EINVAL; 5446 break; 5447 } 5448 5449 return ret; 5450 } 5451 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org