tree: https://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/review/cpumask head: f926e1b19abb750caa57840ff2e76afabae33ce1 commit: 7d9abc5d26ccdc68f2839c75f99af0e6cbca2e73 [1/5] Unify node_to_cpumask_map config: arm64-defconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 7.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 7d9abc5d26ccdc68f2839c75f99af0e6cbca2e73 # save the attached .config to linux build tree GCC_VERSION=7.5.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot All errors (new ones prefixed by >>): In file included from arch/arm64/include/asm/mmzone.h:7:0, from include/linux/mmzone.h:984, from include/linux/gfp.h:6, from include/linux/xarray.h:14, from include/linux/radix-tree.h:18, from include/linux/idr.h:15, from include/linux/kernfs.h:13, from include/linux/sysfs.h:16, from include/linux/kobject.h:20, from include/linux/of.h:17, from include/linux/irqdomain.h:35, from include/linux/acpi.h:13, from include/acpi/apei.h:9, from include/acpi/ghes.h:5, from include/linux/arm_sdei.h:8, from arch/arm64/kernel/asm-offsets.c:10: arch/arm64/include/asm/numa.h: In function 'cpumask_of_node': >> arch/arm64/include/asm/numa.h:26:9: error: 'node_to_cpumask_map' undeclared (first use in this function); did you mean 'free_cpumask_var'? return node_to_cpumask_map[node]; ^~~~~~~~~~~~~~~~~~~ free_cpumask_var arch/arm64/include/asm/numa.h:26:9: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [arch/arm64/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [sub-make] Error 2 25 real 4 user 5 sys 35.82% cpu make prepare vim +26 arch/arm64/include/asm/numa.h 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 19 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 20 #ifdef CONFIG_DEBUG_PER_CPU_MAPS 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 21 const struct cpumask *cpumask_of_node(int node); 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 22 #else 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 23 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */ 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 24 static inline const struct cpumask *cpumask_of_node(int node) 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 25 { 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 @26 return node_to_cpumask_map[node]; 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 27 } 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 28 #endif 1a2db300348b79 Ganapatrao Kulkarni 2016-04-08 29 :::::: The code at line 26 was first introduced by commit :::::: 1a2db300348b799479d2d22b84d51b27ad0458c7 arm64, numa: Add NUMA support for arm64 platforms. :::::: TO: Ganapatrao Kulkarni :::::: CC: Will Deacon --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org