tree: https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator.git kernel-in-vmalloc-v5.13-rc1 head: 7e5485b7d61fc97a247dc26f4888293aab05136b commit: e6cd53886e36cf1bef7e3a060a61805d156dabc9 [2/8] ARM: Print virtual memory info again config: arm-randconfig-r026-20210517 (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 e6cd53886e36cf1bef7e3a060a61805d156dabc9 # 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 warnings (new ones prefixed by >>): arch/arm/mm/init.c:97:13: warning: no previous prototype for function 'setup_dma_zone' [-Wmissing-prototypes] void __init setup_dma_zone(const struct machine_desc *mdesc) ^ arch/arm/mm/init.c:97:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init setup_dma_zone(const struct machine_desc *mdesc) ^ static " kernel : 0x%08lx - 0x%08lx (%4ld MB)\n", ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:363:36: note: expanded from macro 'pr_notice' printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ MLM(MODULES_VADDR, MODULES_END), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/printk.h:363:36: note: expanded from macro 'pr_notice' printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__) ~~~~~~~~~~~~~~~~~~~~~~~ ^ arch/arm/mm/init.c:298:25: note: expanded from macro 'MLM' #define MLM(b, t) b, t, ((t) - (b)) >> 20 ^ arch/arm/mm/init.c:296:13: warning: no previous prototype for function 'mem_init_print_arm_info' [-Wmissing-prototypes] void __init mem_init_print_arm_info(void) ^ arch/arm/mm/init.c:296:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init mem_init_print_arm_info(void) ^ static 4 warnings generated. vim +306 arch/arm/mm/init.c 295 296 void __init mem_init_print_arm_info(void) 297 { 298 #define MLM(b, t) b, t, ((t) - (b)) >> 20 299 pr_notice("Virtual kernel memory layout:\n" 300 " fixmap : 0x%08lx - 0x%08lx (%4ld MB)\n" 301 " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" 302 " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" 303 #ifdef CONFIG_MODULES 304 " modules : 0x%08lx - 0x%08lx (%4ld MB)\n", 305 #endif 307 MLM(FIXADDR_START, FIXADDR_END), 308 MLM(VMALLOC_START, VMALLOC_END), 309 MLM(PAGE_OFFSET, (unsigned long)high_memory), 310 #ifdef CONFIG_MODULES 312 #endif 313 /* From beginning of .text to end of .bss */ 314 MLM((unsigned long)_text, (unsigned long)__bss_stop)); 315 #undef MLM 316 } 317 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org