tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-5.4 head: de62e075613ad8d1b4979186b1962e3ae58156f2 commit: c13517e00945f874d87a7d9e140ea0f6c5384f9a [196/290] mm/memory.c: fix a huge pud insertion race during faulting config: x86_64-defconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 13d44b2a0c7ef404b13b16644765977cd5310fe2) reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout c13517e00945f874d87a7d9e140ea0f6c5384f9a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): In file included from arch/x86/kernel/asm-offsets.c:13: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:20: In file included from include/linux/mm.h:99: In file included from arch/x86/include/asm/pgtable.h:1469: if (pud_none(pudval) || pud_trans_huge(pudval) || pud_devmap(pudval)) ^ In file included from arch/x86/kernel/asm-offsets.c:13: In file included from include/linux/suspend.h:5: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:20: static inline int pud_devmap(pud_t pud) ^ include/asm-generic/pgtable.h:920:52: note: previous implicit declaration is here if (pud_none(pudval) || pud_trans_huge(pudval) || pud_devmap(pudval)) ^ 2 errors generated. make[2]: *** [scripts/Makefile.build:99: arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [Makefile:1111: prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:179: sub-make] Error 2 vim +/pud_devmap +920 include/asm-generic/pgtable.h 914 915 /* See pmd_none_or_trans_huge_or_clear_bad for discussion. */ 916 static inline int pud_none_or_trans_huge_or_dev_or_clear_bad(pud_t *pud) 917 { 918 pud_t pudval = READ_ONCE(*pud); 919 921 return 1; 922 if (unlikely(pud_bad(pudval))) { 923 pud_clear_bad(pud); 924 return 1; 925 } 926 return 0; 927 } 928 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org