Hi Ming, Thank you for the patch! Yet something to improve: [auto build test ERROR on tip/irq/core] [also build test ERROR on next-20210813] [cannot apply to block/for-next linux/master linus/master v5.14-rc5] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Ming-Lei/genirq-affinity-abstrac... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 04c2721d3530f0723b4c922a8fa9f26b202a20de config: arc-randconfig-r043-20210814 (attached as .config) compiler: arceb-elf-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 # https://github.com/0day-ci/linux/commit/46b1d0ed609db266f6f18e7156c4f294b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Ming-Lei/genirq-affinity-abstract-new-API-from-managed-irq-affinity-spread/20210814-203741 git checkout 46b1d0ed609db266f6f18e7156c4f294bf6c4502 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): In file included from block/blk-mq-cpumap.c:13: include/linux/group_cpus.h: In function 'group_cpus_evenly': 17 | struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); | ^~~~~~~ | kvcalloc In file included from include/linux/genhd.h:16, from include/linux/blkdev.h:8, from include/linux/blk-mq.h:5, from block/blk-mq-cpumap.c:15: include/linux/slab.h: At top level: 658 | static inline void *kcalloc(size_t n, size_t size, gfp_t flags) | ^~~~~~~ In file included from block/blk-mq-cpumap.c:13: include/linux/group_cpus.h:17:33: note: previous implicit declaration of 'kcalloc' with type 'int()' 17 | struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); | ^~~~~~~ cc1: some warnings being treated as errors vim +17 include/linux/group_cpus.h 759f72186bfdd5 Ming Lei 2021-08-14 11 5cd330f089b089 Ming Lei 2021-08-14 12 #ifdef CONFIG_SMP 759f72186bfdd5 Ming Lei 2021-08-14 13 struct cpumask *group_cpus_evenly(unsigned int numgrps); 5cd330f089b089 Ming Lei 2021-08-14 14 #else 5cd330f089b089 Ming Lei 2021-08-14 15 static inline struct cpumask *group_cpus_evenly(unsigned int numgrps) 5cd330f089b089 Ming Lei 2021-08-14 16 { 5cd330f089b089 Ming Lei 2021-08-14 @17 struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); 5cd330f089b089 Ming Lei 2021-08-14 18 5cd330f089b089 Ming Lei 2021-08-14 19 if (!masks) 5cd330f089b089 Ming Lei 2021-08-14 20 return NULL; 5cd330f089b089 Ming Lei 2021-08-14 21 5cd330f089b089 Ming Lei 2021-08-14 22 /* assign all CPUs(cpu 0) to the 1st group only */ 5cd330f089b089 Ming Lei 2021-08-14 23 cpumask_copy(&masks[0], cpu_possible_mask); 5cd330f089b089 Ming Lei 2021-08-14 24 return masks; 5cd330f089b089 Ming Lei 2021-08-14 25 } 5cd330f089b089 Ming Lei 2021-08-14 26 #endif 759f72186bfdd5 Ming Lei 2021-08-14 27 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org