tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.4.y head: 4d0830b6c55d2f882d494879d52e6f2c34f35305 commit: 93fac9fa368d4c49b62745b6f324d019fb42ecc4 [10032/12851] HACK: scripts: headers_install: fix allmodconfig builds config: mips-randconfig-r012-20201209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5ff35356f1af2bb92785b38c657463924d9ec386) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-rt-linux-5.4.y git checkout 93fac9fa368d4c49b62745b6f324d019fb42ecc4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips 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/net/ethernet/mellanox/mlx5/core/main.c:43: In file included from include/linux/mlx5/driver.h:52: In file included from include/linux/mlx5/device.h:37: In file included from include/rdma/ib_verbs.h:51: In file included from include/net/ipv6.h:12: In file included from include/linux/ipv6.h:87: In file included from include/linux/tcp.h:19: include/net/sock.h:2461:29: error: use of undeclared identifier 'SCM_REDUNDANT' put_cmsg(msg, SOL_SOCKET, SCM_REDUNDANT, sizeof(*sred), sred); ^ err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:142:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ drivers/net/ethernet/mellanox/mlx5/core/main.c:253:42: warning: shift count >= width of type [-Wshift-count-overflow] err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); ^~~~~~~~~~~~~~~~ include/linux/dma-mapping.h:142:54: note: expanded from macro 'DMA_BIT_MASK' #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1)) ^ ~~~ 2 warnings and 1 error generated. vim +243 drivers/net/ethernet/mellanox/mlx5/core/main.c 012e50e109fd27 Huy Nguyen 2016-11-17 238 e126ba97dba9ed Eli Cohen 2013-07-07 239 static int set_dma_caps(struct pci_dev *pdev) e126ba97dba9ed Eli Cohen 2013-07-07 240 { e126ba97dba9ed Eli Cohen 2013-07-07 241 int err; e126ba97dba9ed Eli Cohen 2013-07-07 242 e126ba97dba9ed Eli Cohen 2013-07-07 @243 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); e126ba97dba9ed Eli Cohen 2013-07-07 244 if (err) { 1a91de28831a1b Joe Perches 2014-05-07 245 dev_warn(&pdev->dev, "Warning: couldn't set 64-bit PCI DMA mask\n"); e126ba97dba9ed Eli Cohen 2013-07-07 246 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); e126ba97dba9ed Eli Cohen 2013-07-07 247 if (err) { 1a91de28831a1b Joe Perches 2014-05-07 248 dev_err(&pdev->dev, "Can't set PCI DMA mask, aborting\n"); e126ba97dba9ed Eli Cohen 2013-07-07 249 return err; e126ba97dba9ed Eli Cohen 2013-07-07 250 } e126ba97dba9ed Eli Cohen 2013-07-07 251 } e126ba97dba9ed Eli Cohen 2013-07-07 252 e126ba97dba9ed Eli Cohen 2013-07-07 253 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); e126ba97dba9ed Eli Cohen 2013-07-07 254 if (err) { e126ba97dba9ed Eli Cohen 2013-07-07 255 dev_warn(&pdev->dev, 1a91de28831a1b Joe Perches 2014-05-07 256 "Warning: couldn't set 64-bit consistent PCI DMA mask\n"); e126ba97dba9ed Eli Cohen 2013-07-07 257 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); e126ba97dba9ed Eli Cohen 2013-07-07 258 if (err) { e126ba97dba9ed Eli Cohen 2013-07-07 259 dev_err(&pdev->dev, 1a91de28831a1b Joe Perches 2014-05-07 260 "Can't set consistent PCI DMA mask, aborting\n"); e126ba97dba9ed Eli Cohen 2013-07-07 261 return err; e126ba97dba9ed Eli Cohen 2013-07-07 262 } e126ba97dba9ed Eli Cohen 2013-07-07 263 } e126ba97dba9ed Eli Cohen 2013-07-07 264 e126ba97dba9ed Eli Cohen 2013-07-07 265 dma_set_max_seg_size(&pdev->dev, 2u * 1024 * 1024 * 1024); e126ba97dba9ed Eli Cohen 2013-07-07 266 return err; e126ba97dba9ed Eli Cohen 2013-07-07 267 } e126ba97dba9ed Eli Cohen 2013-07-07 268 :::::: The code at line 243 was first introduced by commit :::::: e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c mlx5: Add driver for Mellanox Connect-IB adapters :::::: TO: Eli Cohen <eli(a)mellanox.com&gt; :::::: CC: Roland Dreier <roland(a)purestorage.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org