tree: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git master head: e1d9d7b91302593d1951fcb12feddda6fb58a3c0 commit: 85ce50d337d10a6fd328fa70b0a15543bf5c0f64 [181/184] net: kcov: don't select SKB_EXTENSIONS when there is no NET config: arm64-randconfig-r032-20201113 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9e0c35655b6e8186baef8840b26ba4090503b554) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commi... git remote add netdev-net-next https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git git fetch --no-tags netdev-net-next master git checkout 85ce50d337d10a6fd328fa70b0a15543bf5c0f64 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from drivers/vdpa/ifcvf/ifcvf_main.c:15: In file included from drivers/vdpa/ifcvf/ifcvf_base.h:17: In file included from include/uapi/linux/virtio_net.h:32: In file included from include/linux/if_ether.h:19: include/linux/skbuff.h:4622:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration] u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE); ^ include/linux/skbuff.h:4622:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE' u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE); ^ include/linux/skbuff.h:4631:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration] u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE); ^ include/linux/skbuff.h:4631:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE' u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE); ^ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ drivers/vdpa/ifcvf/ifcvf_main.c:426:42: warning: shift count >= width of type [-Wshift-count-overflow] ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ 2 warnings and 4 errors generated. vim +420 drivers/vdpa/ifcvf/ifcvf_main.c 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 399 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 400 static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id) 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 401 { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 402 struct device *dev = &pdev->dev; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 403 struct ifcvf_adapter *adapter; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 404 struct ifcvf_hw *vf; 3597a2fba672cfd drivers/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-07-31 405 int ret, i; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 406 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 407 ret = pcim_enable_device(pdev); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 408 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 409 IFCVF_ERR(pdev, "Failed to enable device\n"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 410 return ret; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 411 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 412 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 413 ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4), 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 414 IFCVF_DRIVER_NAME); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 415 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 416 IFCVF_ERR(pdev, "Failed to request MMIO region\n"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 417 return ret; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 418 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 419 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 @420 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 421 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 422 IFCVF_ERR(pdev, "No usable DMA confiugration\n"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 423 return ret; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 424 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 425 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 426 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 427 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 428 IFCVF_ERR(pdev, 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 429 "No usable coherent DMA confiugration\n"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 430 return ret; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 431 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 432 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 433 ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 434 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 435 IFCVF_ERR(pdev, 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 436 "Failed for adding devres for freeing irq vectors\n"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 437 return ret; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 438 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 439 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 440 adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa, a9974489b61c09c drivers/vdpa/ifcvf/ifcvf_main.c Max Gurtovoy 2020-08-04 441 dev, &ifc_vdpa_ops, a9974489b61c09c drivers/vdpa/ifcvf/ifcvf_main.c Max Gurtovoy 2020-08-04 442 IFCVF_MAX_QUEUE_PAIRS * 2); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 443 if (adapter == NULL) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 444 IFCVF_ERR(pdev, "Failed to allocate vDPA structure"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 445 return -ENOMEM; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 446 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 447 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 448 pci_set_master(pdev); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 449 pci_set_drvdata(pdev, adapter); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 450 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 451 vf = &adapter->vf; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 452 vf->base = pcim_iomap_table(pdev); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 453 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 454 adapter->pdev = pdev; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 455 adapter->vdpa.dma_dev = &pdev->dev; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 456 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 457 ret = ifcvf_init_hw(vf, pdev); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 458 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 459 IFCVF_ERR(pdev, "Failed to init IFCVF hw\n"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 460 goto err; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 461 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 462 3597a2fba672cfd drivers/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-07-31 463 for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) 3597a2fba672cfd drivers/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-07-31 464 vf->vring[i].irq = -EINVAL; 3597a2fba672cfd drivers/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-07-31 465 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 466 ret = vdpa_register_device(&adapter->vdpa); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 467 if (ret) { 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 468 IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus"); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 469 goto err; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 470 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 471 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 472 return 0; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 473 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 474 err: 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 475 put_device(&adapter->vdpa.dev); 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 476 return ret; 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 477 } 5a2414bc454e89e drivers/virtio/vdpa/ifcvf/ifcvf_main.c Zhu Lingshan 2020-03-26 478 :::::: The code at line 420 was first introduced by commit :::::: 5a2414bc454e89e0515b47500734a65aa40cf9fe virtio: Intel IFC VF driver for VDPA :::::: TO: Zhu Lingshan <lingshan.zhu(a)intel.com&gt; :::::: CC: Michael S. Tsirkin <mst(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org