tree: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git kernel-in-vmalloc-v5.13-rc1 head: 7e5485b7d61fc97a247dc26f4888293aab05136b commit: 63d42bff112c6522ab18d6b2484fcc29161cc6ef [7/8] ARM: Compile the kernel into VMALLOC config: arm-randconfig-r012-20210517 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 0a34ff8bcb1df16fe7d643ccbe4567b2162c5024) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.g... git remote add arm-integrator https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git git fetch --no-tags arm-integrator kernel-in-vmalloc-v5.13-rc1 git checkout 63d42bff112c6522ab18d6b2484fcc29161cc6ef # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm 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 >>): -- pages[i] = virt_to_page(start); ^~~~~ arch/arm/include/asm/memory.h:441:53: note: expanded from macro 'virt_to_page' #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) ^~~~~ include/asm-generic/memory_model.h:33:41: note: expanded from macro '__pfn_to_page' #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) ^~~ arch/arm/include/asm/memory.h:323:53: note: passing argument to parameter 'kaddr' here static inline unsigned long virt_to_pfn(const void *kaddr) ^ 1 warning generated. -- struct page *page = virt_to_page(from); ^~~~ arch/arm/include/asm/memory.h:441:53: note: expanded from macro 'virt_to_page' #define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr)) ^~~~~ include/asm-generic/memory_model.h:33:41: note: expanded from macro '__pfn_to_page' #define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET)) ^~~ arch/arm/include/asm/memory.h:323:53: note: passing argument to parameter 'kaddr' here static inline unsigned long virt_to_pfn(const void *kaddr) ^ mm/nommu.c:1648:15: warning: no previous prototype for function 'arch_get_unmapped_area' [-Wmissing-prototypes] unsigned long arch_get_unmapped_area(struct file *file, unsigned long addr, ^ mm/nommu.c:1648:1: note: declare 'static' if the function is not intended to be used outside of this translation unit unsigned long arch_get_unmapped_area(struct file *file, unsigned long addr, ^ static 2 warnings generated. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org