tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/mm.pae head: ce0487547e80c85cd1deec9bce726a58110457fe commit: 833e9fc96f63a8e37d78baad15362b5ad8baac3c [5/9] mm: Rename pmd_read_atomic() config: x86_64-randconfig-a013 compiler: gcc-11 (Debian 11.3.0-8) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=833e9fc96f63a8e37d78baad15362b5ad8baac3c git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue x86/mm.pae git checkout 833e9fc96f63a8e37d78baad15362b5ad8baac3c # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot All errors (new ones prefixed by >>): mm/khugepaged.c: In function 'find_pmd_or_thp_or_none': >> mm/khugepaged.c:865:16: error: implicit declaration of function 'pmd_read_atomic' [-Werror=implicit-function-declaration] 865 | pmde = pmd_read_atomic(*pmd); | ^~~~~~~~~~~~~~~ >> mm/khugepaged.c:865:16: error: incompatible types when assigning to type 'pmd_t' from type 'int' cc1: some warnings being treated as errors vim +/pmd_read_atomic +865 mm/khugepaged.c b46e756f5e47031 Kirill A. Shutemov 2016-07-26 854 507228044236804 Zach O'Keefe 2022-07-06 855 static int find_pmd_or_thp_or_none(struct mm_struct *mm, 507228044236804 Zach O'Keefe 2022-07-06 856 unsigned long address, 507228044236804 Zach O'Keefe 2022-07-06 857 pmd_t **pmd) 507228044236804 Zach O'Keefe 2022-07-06 858 { 507228044236804 Zach O'Keefe 2022-07-06 859 pmd_t pmde; 507228044236804 Zach O'Keefe 2022-07-06 860 507228044236804 Zach O'Keefe 2022-07-06 861 *pmd = mm_find_pmd(mm, address); 507228044236804 Zach O'Keefe 2022-07-06 862 if (!*pmd) 507228044236804 Zach O'Keefe 2022-07-06 863 return SCAN_PMD_NULL; 507228044236804 Zach O'Keefe 2022-07-06 864 507228044236804 Zach O'Keefe 2022-07-06 @865 pmde = pmd_read_atomic(*pmd); 507228044236804 Zach O'Keefe 2022-07-06 866 :::::: The code at line 865 was first introduced by commit :::::: 50722804423680488b8063f6cc9a451333bf6f9b mm/khugepaged: record SCAN_PMD_MAPPED when scan_pmd() finds hugepage :::::: TO: Zach O'Keefe :::::: CC: Andrew Morton -- 0-DAY CI Kernel Test Service https://01.org/lkp