Hi Masahiro, I love your patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on next-20210225] [cannot apply to kbuild/for-next asm-generic/master arm64/for-next/core m68k/for-next openrisc/for-next hp-parisc/for-next arc/for-next uclinux-h8/h8300-next nios2/for-linus v5.11] [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/Masahiro-Yamada/kbuild-build-speed-improvment-of-CONFIG_TRIM_UNUSED_KSYMS/20210226-000929 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 29c395c77a9a514c5857c45ceae2665e9bd99ac7 config: arc-randconfig-r031-20210225 (attached as .config) compiler: arc-elf-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 # https://github.com/0day-ci/linux/commit/014940331790a8cd9bee92c7201494ec3217201e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Masahiro-Yamada/kbuild-build-speed-improvment-of-CONFIG_TRIM_UNUSED_KSYMS/20210226-000929 git checkout 014940331790a8cd9bee92c7201494ec3217201e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from drivers/of/unittest-data/testcases.dtb.S:1: >> include/asm-generic/vmlinux.lds.h:53:5: warning: "CONFIG_TRIM_UNUSED_KSYMS" is not defined, evaluates to 0 [-Wundef] 53 | #if CONFIG_TRIM_UNUSED_KSYMS | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/CONFIG_TRIM_UNUSED_KSYMS +53 include/asm-generic/vmlinux.lds.h > 53 #if CONFIG_TRIM_UNUSED_KSYMS 54 #include <generated/keep-ksyms.h> 55 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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