tree: https://android.googlesource.com/kernel/common android12-5.10 head: 870488eb0745645feff5bddfd44fe538660b9cf8 commit: a2b3afb2f7437d3c84a5ebdeb2ff957deadaee57 [22/54] ANDROID: android: Add symbols to debug_symbols driver config: arm-randconfig-c002-20210910 (attached as .config) compiler: arm-linux-gnueabi-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 android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android12-5.10 git checkout a2b3afb2f7437d3c84a5ebdeb2ff957deadaee57 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm 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 >>): arm-linux-gnueabi-ld: drivers/android/debug_symbols.o:(.rodata+0x14): undefined reference to `__per_cpu_start' arm-linux-gnueabi-ld: drivers/android/debug_symbols.o:(.rodata+0x1c): undefined reference to `__per_cpu_end' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for ASYNC_TX_ENABLE_CHANNEL_SWITCH Depends on DMADEVICES Selected by - GKI_HIDDEN_DMA_CONFIGS WARNING: unmet direct dependencies detected for DRM_MIPI_DSI Depends on HAS_IOMEM && DRM Selected by - GKI_HIDDEN_DRM_CONFIGS WARNING: unmet direct dependencies detected for DRM_KMS_CMA_HELPER Depends on HAS_IOMEM && DRM Selected by - GKI_HIDDEN_DRM_CONFIGS WARNING: unmet direct dependencies detected for DRM_GEM_CMA_HELPER Depends on HAS_IOMEM && DRM Selected by - GKI_HIDDEN_DRM_CONFIGS WARNING: unmet direct dependencies detected for BALLOON_COMPACTION Depends on COMPACTION && MEMORY_BALLOON Selected by - GKI_HIDDEN_MM_CONFIGS --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org