Hi Atish, First bad commit (maybe != root cause): tree: https://github.com/atishp04/linux 5.10_numa_unified_v2 head: 54c2769b07a0e9c8344550c6a7a974c4e406c852 commit: 54c2769b07a0e9c8344550c6a7a974c4e406c852 [7/7] riscv: Add numa support for riscv64 platform config: riscv-allyesconfig (attached as .config) compiler: riscv64-linux-gcc (GCC) 9.3.0 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 checkout 54c2769b07a0e9c8344550c6a7a974c4e406c852 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 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 >>): 463 | int __init arch_acpi_numa_init(void) | ^~~~~~~~~~~~~~~~~~~ # https://github.com/atishp04/linux/commit/54c2769b07a0e9c8344550c6a7a974c4... git remote add atishp04 https://github.com/atishp04/linux git fetch --no-tags atishp04 5.10_numa_unified_v2 git checkout 54c2769b07a0e9c8344550c6a7a974c4e406c852 vim +/arch_acpi_numa_init +463 drivers/base/arch_numa.c 1a2db300348b799 arch/arm64/mm/numa.c Ganapatrao Kulkarni 2016-04-08 448 e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 449 #ifdef CONFIG_ACPI_NUMA e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 450 int __init arch_acpi_numa_init(void) e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 451 { e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 452 int ret; e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 453 e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 454 ret = acpi_numa_init(); e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 455 if (ret) { e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 456 pr_info("Failed to initialise from firmware\n"); e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 457 return ret; e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 458 } e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 459 e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 460 return srat_disabled() ? -EINVAL : 0; e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 461 } e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 462 #else e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 @463 int __init arch_acpi_numa_init(void) e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 464 { e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 465 return -EOPNOTSUPP; e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 466 } e985c02f4d098fa drivers/base/arch_numa.c Atish Patra 2020-08-04 467 :::::: The code at line 463 was first introduced by commit :::::: e985c02f4d098fa333910c800603f84d99db6136 arm64, numa: Change the numa init function name to be generic :::::: TO: Atish Patra <atish.patra(a)wdc.com&gt; :::::: CC: Atish Patra <atish.patra(a)wdc.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org