Hi Lai, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on tip/auto-latest] [also build test ERROR on next-20200526] [cannot apply to linus/master tip/x86/core linux/master v5.7-rc7] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Lai-Jiangshan/x86-hw_breakpoint-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 1089ae4cbd9c4fdcfcec0581d73567236b8d90c7 config: i386-tinyconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=i386 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 <<): ld: arch/x86/kernel/hw_breakpoint.o: in function `hw_breakpoint_arch_parse': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org