tree: https://git.kernel.org/pub/scm/linux/kernel/git/rppt/linux.git secretmemfd/v0 head: 1326697aa18ea5ff8a6bf71797e79bee601afcba commit: 1326697aa18ea5ff8a6bf71797e79bee601afcba [6/6] mm: secretmem: add ability to reserve memory at boot config: i386-tinyconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 reproduce (this is a W=1 build): git checkout 1326697aa18ea5ff8a6bf71797e79bee601afcba # 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: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: mm/secretmem.o: in function `secretmem_freepage': secretmem.c:(.text+0x2a): undefined reference to `gen_pool_free_owner' ld: mm/secretmem.o: in function `secretmem_evict_inode': secretmem.c:(.text+0x70): undefined reference to `gen_pool_for_each_chunk' ld: secretmem.c:(.text+0x78): undefined reference to `gen_pool_destroy' ld: mm/secretmem.o: in function `secretmem_init': secretmem.c:(.text+0x115): undefined reference to `gen_pool_create' ld: secretmem.c:(.text+0x13c): undefined reference to `gen_pool_add_owner' ld: secretmem.c:(.text+0x152): undefined reference to `gen_pool_destroy' ld: secretmem.c:(.text+0x1d2): undefined reference to `gen_pool_destroy' ld: mm/secretmem.o: in function `secretmem_cleanup_chunk': secretmem.c:(.text+0x210): undefined reference to `gen_pool_free_owner' ld: mm/secretmem.o: in function `secretmem_fault': secretmem.c:(.text+0x2c5): undefined reference to `gen_pool_avail' ld: secretmem.c:(.text+0x306): undefined reference to `gen_pool_alloc_algo_owner' ld: secretmem.c:(.text+0x37b): undefined reference to `gen_pool_add_owner' ld: secretmem.c:(.text+0x3b5): undefined reference to `gen_pool_alloc_algo_owner' ld: mm/secretmem.o: in function `__ia32_sys_secretmemfd': secretmem.c:(.text+0x4db): undefined reference to `gen_pool_create' ld: secretmem.c:(.text+0x50d): undefined reference to `gen_pool_destroy' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org