[kbuild-all] Re: [linux-next:master 3136/3150] init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: cd557f1c605fc5a2c0eb0b540610f50dc67dd849 commit: 9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a [3136/3150] buildid: stash away kernels build ID on init config: x86_64-randconfig-a005-20210514 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 9bbb6ec7e7a5cbc59222379498d5a3b8ac21080a # save the attached .config to linux build tree make W=1 W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the linux-next/master HEAD cd557f1c605fc5a2c0eb0b540610f50dc67dd849 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): init/main.c: In function 'start_kernel': >> init/main.c:925:2: error: implicit declaration of function 'init_vmlinux_build_id' [-Werror=implicit-function-declaration] 925 | init_vmlinux_build_id(); | ^~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors