tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10 head: e95975499c9370e3227f332445708ebb3f70a9e0 commit: 613bf95a43405d9180583f11980360b7e9862376 [9936/9999] CHROMIUM: coiommu: initialize the DMA tracking table config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220120/202201202005.cUy94h5h-lk...) compiler: alpha-linux-gcc (GCC) 11.2.0 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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-5.10 git checkout 613bf95a43405d9180583f11980360b7e9862376 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): kernel/dma/coiommu.c: In function 'get_dtt_level': 406 | pfn_width = MAX_PHYSMEM_BITS - PAGE_SHIFT; | ^~~~~~~~~~~~~~~~ kernel/dma/coiommu.c:406:21: note: each undeclared identifier is reported only once for each function it appears in At top level: kernel/dma/coiommu.c:381:33: warning: 'coiommu_ops' defined but not used [-Wunused-const-variable=] 381 | static const struct dma_map_ops coiommu_ops = { | ^~~~~~~~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for SND_AMD_ACP_CONFIG Depends on SOUND && !UML && SND && SND_SOC && SND_SOC_ACPI Selected by - SND_SOC_SOF_AMD_COMMON && SOUND && !UML && SND && SND_SOC && SND_SOC_SOF_TOPLEVEL && SND_SOC_SOF_AMD_TOPLEVEL vim +/MAX_PHYSMEM_BITS +406 kernel/dma/coiommu.c 401 402 static inline unsigned int get_dtt_level(void) 403 { 404 unsigned int pfn_width; 405 407 408 if (pfn_width <= COIOMMU_PT_LEVEL_STRIDE) 409 return 1; 410 411 return DIV_ROUND_UP((pfn_width - COIOMMU_PT_LEVEL_STRIDE), 412 COIOMMU_UPPER_LEVEL_STRIDE) + 1; 413 } 414 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org