Hi Peter, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [cannot apply to mmotm/master hnaz-linux-mm/master arm64/for-next/core tip/x86/asm v5.8 next-20200813] [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/Peter-Collingbourne/mm-introduce... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dddcbc139e96bd18d8c65ef7b7e440f0d32457c2 config: s390-allyesconfig (attached as .config) compiler: s390-linux-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from arch/s390/include/uapi/asm/unistd.h:14, from arch/s390/include/asm/unistd.h:10, from arch/s390/kernel/compat_audit.c:3: 415 | #define __NR_faccessat2 440 | ./arch/s390/include/generated/uapi/asm/unistd_32.h:414: note: this is the location of the previous definition 414 | #define __NR_faccessat2 439 | --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org