Hi Ming, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linux/master] [also build test WARNING on arm64/for-next/core powerpc/next asm-generic/master linus/master v5.13-rc4] [cannot apply to hnaz-linux-mm/master tip/x86/core next-20210601] [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/Ming-Lin/mm-adds-MAP_NOSIGBUS-extension-for-shmem-read/20210602-072403 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dd860052c99b1e088352bdd4fb7aef46f8d2ef47 compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: cd tools/perf && ./check-headers.sh If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> perfheadercheck warnings: (new ones prefixed by >>) >> Warning: Kernel ABI header at 'tools/include/uapi/asm-generic/mman-common.h' differs from latest version at 'include/uapi/asm-generic/mman-common.h': 32> #define MAP_NOSIGBUS 0x200000 /* do not SIGBUS on out-of-band shmem read */ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx