tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 9fbee811e479aca2f3523787cae1f46553141b40 commit: 59c975083d3705f1df1355f90150df6c40360a16 [7775/7923] mm: add folio_estimated_mapcount() config: arm-randconfig-r005-20230123 (https://download.01.org/0day-ci/archive/20230125/202301252152.QmVnQfjf-lkp@xxxxxxxxx/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a) 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/next/linux-next.git/commit/?id=59c975083d3705f1df1355f90150df6c40360a16 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 59c975083d3705f1df1355f90150df6c40360a16 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm prepare If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the linux-next/master HEAD 9fbee811e479aca2f3523787cae1f46553141b40 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): In file included from arch/arm/kernel/asm-offsets.c:12: >> include/linux/mm.h:918:23: error: call to undeclared function 'page_to_section'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] return page_mapcount(folio_page(folio, 0)); ^ include/linux/page-flags.h:286:30: note: expanded from macro 'folio_page' #define folio_page(folio, n) nth_page(&(folio)->page, n) ^ include/linux/mm.h:216:38: note: expanded from macro 'nth_page' #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) ^ include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn' #define page_to_pfn __page_to_pfn ^ include/asm-generic/memory_model.h:35:14: note: expanded from macro '__page_to_pfn' int __sec = page_to_section(__pg); \ ^ include/linux/mm.h:918:23: note: did you mean '__nr_to_section'? include/linux/page-flags.h:286:30: note: expanded from macro 'folio_page' #define folio_page(folio, n) nth_page(&(folio)->page, n) ^ include/linux/mm.h:216:38: note: expanded from macro 'nth_page' #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) ^ include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn' #define page_to_pfn __page_to_pfn ^ include/asm-generic/memory_model.h:35:14: note: expanded from macro '__page_to_pfn' int __sec = page_to_section(__pg); \ ^ include/linux/mmzone.h:1843:35: note: '__nr_to_section' declared here static inline struct mem_section *__nr_to_section(unsigned long nr) ^ In file included from arch/arm/kernel/asm-offsets.c:12: >> include/linux/mm.h:1626:29: error: static declaration of 'page_to_section' follows non-static declaration static inline unsigned long page_to_section(const struct page *page) ^ include/linux/mm.h:918:23: note: previous implicit declaration is here return page_mapcount(folio_page(folio, 0)); ^ include/linux/page-flags.h:286:30: note: expanded from macro 'folio_page' #define folio_page(folio, n) nth_page(&(folio)->page, n) ^ include/linux/mm.h:216:38: note: expanded from macro 'nth_page' #define nth_page(page,n) pfn_to_page(page_to_pfn((page)) + (n)) ^ include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn' #define page_to_pfn __page_to_pfn ^ include/asm-generic/memory_model.h:35:14: note: expanded from macro '__page_to_pfn' int __sec = page_to_section(__pg); \ ^ 2 errors generated. make[2]: *** [scripts/Makefile.build:114: arch/arm/kernel/asm-offsets.s] Error 1 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:1286: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:242: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/page_to_section +918 include/linux/mm.h 915 916 static inline int folio_estimated_mapcount(struct folio *folio) 917 { > 918 return page_mapcount(folio_page(folio, 0)); 919 } 920 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
