Hi Huangzhaoyang, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on arm64/for-next/core] [also build test ERROR on v5.16-rc2 next-20211118] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Huangzhaoyang/arch-arm64-introdu... base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core config: arm64-buildonly-randconfig-r004-20211122 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c133fb321f7ca6083ce15b6aa5bf89de6600e649) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/6d67cb438683b6f0ae4e8ca1504af4f8e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Huangzhaoyang/arch-arm64-introduce-RODATA_FULL_USE_PTE_CONT/20211122-133031 git checkout 6d67cb438683b6f0ae4e8ca1504af4f8e9815b88 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/ 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 >>): if (old | new) & PTE_CONT) ^ ~~~~~~~~ if (old | new) & PTE_CONT) ^ ; 3 errors generated. vim +140 arch/arm64/mm/mmu.c 133 134 /* creating or taking down mappings is always safe */ 135 if (old == 0 || new == 0) 136 return true; 137 138 /* live contiguous mappings may not be manipulated at all */ 139 #ifndef CONFIG_RODATA_FULL_USE_PTE_CONT 141 return false; 142 #endif 143 144 /* Transitioning from Non-Global to Global is unsafe */ 145 if (old & ~new & PTE_NG) 146 return false; 147 148 /* 149 * Changing the memory type between Normal and Normal-Tagged is safe 150 * since Tagged is considered a permission attribute from the 151 * mismatched attribute aliases perspective. 152 */ 153 if (((old & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL) || 154 (old & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL_TAGGED)) && 155 ((new & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL) || 156 (new & PTE_ATTRINDX_MASK) == PTE_ATTRINDX(MT_NORMAL_TAGGED))) 157 mask |= PTE_ATTRINDX_MASK; 158 159 return ((old ^ new) & ~mask) == 0; 160 } 161 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org