Hi Yang, [auto build test ERROR on mmotm/master] [also build test ERROR on v4.14-rc3 next-20170929] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Yang-Shi/oom-capture-unreclaimable-slab-info-in-oom-message/20171007-173639 base: git://git.cmpxchg.org/linux-mmotm.git master config: openrisc-or1ksim_defconfig (attached as .config) compiler: or1k-linux-gcc (GCC) 5.4.0 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 make.cross ARCH=openrisc All errors (new ones prefixed by >>): mm/slab_common.o: In function `slab_show': slab_common.c:(.text+0x1c4): undefined reference to `get_slabinfo' slab_common.c:(.text+0x1c4): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `get_slabinfo' >> slab_common.c:(.text+0x268): undefined reference to `slabinfo_show_stats' slab_common.c:(.text+0x268): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `slabinfo_show_stats' >> mm/slab_common.o:(.rodata+0xc): undefined reference to `slabinfo_write' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation