tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: ede43f2956cc25e387a5e225324104f22e715908 commit: 6c096b0425160233d2a8c3ec3f3d82dae5c37678 [167/506] mm: hugetlb: proc: check for hugetlb shared PMD in /proc/PID/smaps config: i386-randconfig-a015 (https://download.01.org/0day-ci/archive/20230128/202301282035.M6wJfQhs-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) 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/akpm/mm.git/commit/?id=6c096b0425160233d2a8c3ec3f3d82dae5c37678 git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git git fetch --no-tags akpm-mm mm-unstable git checkout 6c096b0425160233d2a8c3ec3f3d82dae5c37678 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/infiniband/core/ drivers/net/ethernet/mellanox/mlx5/core/ fs/cifs/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the akpm-mm/mm-unstable HEAD ede43f2956cc25e387a5e225324104f22e715908 builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): In file included from drivers/infiniband/core/umem_odp.c:41: >> include/linux/hugetlb.h:1193:9: error: implicit declaration of function 'page_count' is invalid in C99 [-Werror,-Wimplicit-function-declaration] return page_count(virt_to_page(pte)) > 1; ^ In file included from drivers/infiniband/core/umem_odp.c:43: In file included from include/linux/hmm.h:12: In file included from include/linux/mm.h:25: >> include/linux/page_ref.h:92:19: error: static declaration of 'page_count' follows non-static declaration static inline int page_count(const struct page *page) ^ include/linux/hugetlb.h:1193:9: note: previous implicit declaration is here return page_count(virt_to_page(pte)) > 1; ^ 2 errors generated. vim +/page_count +1193 include/linux/hugetlb.h 1189 1190 #ifdef CONFIG_ARCH_WANT_HUGE_PMD_SHARE 1191 static inline bool hugetlb_pmd_shared(pte_t *pte) 1192 { > 1193 return page_count(virt_to_page(pte)) > 1; 1194 } 1195 #else 1196 static inline bool hugetlb_pmd_shared(pte_t *pte) 1197 { 1198 return false; 1199 } 1200 #endif 1201 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
