Hi Gavin, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on next-20200409] [cannot apply to kvmarm/next arm64/for-next/core v5.6 v5.6-rc7 v5.6-rc6 v5.6] [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/Gavin-Shan/Support-Async-Page-Fault/20200410-175548 base: 873e37a44b1ee8ad4628ca257dc51c0c7c654326 config: arm64-allyesconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce: 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 GCC_VERSION=9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot All errors (new ones prefixed by >>): >> Makefile:1224: *** Headers not exportable for the arm64 architecture. Stop. make[1]: *** Waiting for unfinished jobs.... make: *** [Makefile:180: sub-make] Error 2 14 real 7 user 9 sys 114.17% cpu make prepare vim +1224 Makefile 6d71627581e96e David Woodhouse 2006-09-24 1221 59b2bd05f5f4dc Masahiro Yamada 2019-06-04 1222 PHONY += headers 59b2bd05f5f4dc Masahiro Yamada 2019-06-04 1223 headers: $(version_h) scripts_unifdef uapi-asm-generic archheaders archscripts 9d022c540606a5 Masahiro Yamada 2017-10-04 @1224 $(if $(wildcard $(srctree)/arch/$(SRCARCH)/include/uapi/asm/Kbuild),, \ 2fb9b1bd9dd7f4 Sam Ravnborg 2008-06-21 1225 $(error Headers not exportable for the $(SRCARCH) architecture)) d5470d14431e9d Masahiro Yamada 2019-06-04 1226 $(Q)$(MAKE) $(hdr-inst)=include/uapi d5470d14431e9d Masahiro Yamada 2019-06-04 1227 $(Q)$(MAKE) $(hdr-inst)=arch/$(SRCARCH)/include/uapi 1f85712e6e1f24 Mike Frysinger 2007-02-14 1228 :::::: The code at line 1224 was first introduced by commit :::::: 9d022c540606a5a8ae5d1cc02fc12de362ba4585 kbuild: replace $(hdr-arch) with $(SRCARCH) :::::: TO: Masahiro Yamada :::::: CC: Masahiro Yamada --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org