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-abstract-new-API-from-managed-irq-affinity-spread/20210814-203741 base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 04c2721d3530f0723b4c922a8fa9f26b202a20de config: riscv-buildonly-randconfig-r005-20210814 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1f7b25ea76a925aca690da28de9d78db7ca99d0c) 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/46b1d0ed609db266f6f18e7156c4f294bf6c4502 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=clang make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All error/warnings (new ones prefixed by >>): In file included from block/blk-mq-cpumap.c:13: >> include/linux/group_cpus.h:17:26: error: implicit declaration of function 'kcalloc' [-Werror,-Wimplicit-function-declaration] struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); ^ include/linux/group_cpus.h:17:26: note: did you mean 'kvcalloc'? include/linux/mm.h:827:21: note: 'kvcalloc' declared here static inline void *kvcalloc(size_t n, size_t size, gfp_t flags) ^ In file included from block/blk-mq-cpumap.c:13: >> include/linux/group_cpus.h:17:18: warning: incompatible integer to pointer conversion initializing 'struct cpumask *' with an expression of type 'int' [-Wint-conversion] struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from block/blk-mq-cpumap.c:15: In file included from include/linux/blk-mq.h:5: In file included from include/linux/blkdev.h:8: In file included from include/linux/genhd.h:16: >> include/linux/slab.h:658:21: error: static declaration of 'kcalloc' follows non-static declaration static inline void *kcalloc(size_t n, size_t size, gfp_t flags) ^ include/linux/group_cpus.h:17:26: note: previous implicit declaration is here struct cpumask *masks = kcalloc(numgrps, sizeof(*masks), GFP_KERNEL); ^ In file included from block/blk-mq-cpumap.c:15: In file included from include/linux/blk-mq.h:5: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from block/blk-mq-cpumap.c:15: In file included from include/linux/blk-mq.h:5: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from block/blk-mq-cpumap.c:15: In file included from include/linux/blk-mq.h:5: In file included from include/linux/blkdev.h:18: In file included from include/linux/bio.h:8: In file included from include/linux/highmem.h:10: In file included from include/linux/hardirq.h:11: In file included from ./arch/riscv/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/riscv/include/asm/io.h:136: include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port; ~~~~~~~~~~ ^ 8 warnings and 2 errors generated. vim +/kcalloc +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