Hi YiFei, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on bpf/master] [also build test ERROR on security/next-testing linus/master v5.13-rc1 next-20210511] [cannot apply to bpf-next/master] [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/YiFei-Zhu/eBPF-seccomp-filters/2... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master config: um-randconfig-r015-20210511 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/ba3f5684e3ca422ada133e4c32a00e189... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review YiFei-Zhu/eBPF-seccomp-filters/20210511-012537 git checkout ba3f5684e3ca422ada133e4c32a00e189fe490a8 # save the attached .config to linux build tree make W=1 W=1 ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x8): undefined reference to `X86_FEATURE_XMM2' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x14): undefined reference to `X86_FEATURE_XMM2' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x20): undefined reference to `X86_FEATURE_XMM' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x2c): undefined reference to `X86_FEATURE_XMM' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x38): undefined reference to `X86_FEATURE_XMM' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x44): undefined reference to `X86_FEATURE_XMM' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x50): undefined reference to `X86_FEATURE_XMM' /usr/bin/ld: kernel/irq/generic-chip.o:(.altinstructions+0x5c): more undefined references to `X86_FEATURE_XMM' follow /usr/bin/ld: drivers/mtd/nand/raw/nand_legacy.o:(.altinstructions+0x8): undefined reference to `X86_FEATURE_XMM2' /usr/bin/ld: drivers/mtd/nand/raw/nand_legacy.o:(.altinstructions+0x14): undefined reference to `X86_FEATURE_XMM2' collect2: error: ld returned 1 exit status --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org