[kbuild-all] [aa:mapcount_deshare 7/7] include/linux/mm.h:2885:10: error: implicit declaration of function 'page_trans_huge_anon_shared'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git mapcount_deshare head: b58213a81caf568f0712f5586d1661ee1e2e3d67 commit: b58213a81caf568f0712f5586d1661ee1e2e3d67 [7/7] gup: FOLL_DESHARE: copy-on-read fault config: arc-randconfig-r011-20210115 (attached as .config) compiler: arc-elf-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git/commit/?id=... git remote add aa https://git.kernel.org/pub/scm/linux/kernel/git/andrea/aa.git git fetch --no-tags aa mapcount_deshare git checkout b58213a81caf568f0712f5586d1661ee1e2e3d67 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 errors (new ones prefixed by >>): In file included from arch/arc/kernel/asm-offsets.c:7: include/linux/mm.h: In function 'gup_page_deshare': 2885 | return page_trans_huge_anon_shared(page); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors -- In file included from arch/arc/kernel/asm-offsets.c:7: include/linux/mm.h: In function 'gup_page_deshare': 2885 | return page_trans_huge_anon_shared(page); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors make[2]: *** [scripts/Makefile.build:117: arch/arc/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1206: prepare0] Error 2 make[1]: Target 'modules_prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 make: Target 'modules_prepare' not remade because of errors. -- In file included from arch/arc/kernel/asm-offsets.c:7: include/linux/mm.h: In function 'gup_page_deshare': 2885 | return page_trans_huge_anon_shared(page); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors make[2]: *** [scripts/Makefile.build:117: arch/arc/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1206: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:185: __sub-make] Error 2 make: Target 'prepare' not remade because of errors. vim +/page_trans_huge_anon_shared +2885 include/linux/mm.h 2874 2875 static inline bool gup_page_deshare(unsigned int flags, 2876 struct page *page) 2877 { 2878 if (flags & FOLL_WRITE) 2879 return false; 2880 if (!PageAnon(page)) 2881 return false; 2882 if (PageHuge(page)) 2883 return false; 2884 if (PageTransHuge(page)) 2886 /* page_mapcount > 1 */ 2887 return atomic_read(&page->_mapcount) > 0; 2888 } 2889 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org