Hi Stefan, Thank you for the patch! Yet something to improve: [auto build test ERROR on char-misc/char-misc-testing] [also build test ERROR on linus/master v5.19-rc2 next-20220615] [cannot apply to robh/for-next] [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/intel-lab-lkp/linux/commits/Stefan-Berger/tpm-Preserve-TPM-measurement-log-across-kexec/20220615-001510 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 0a35780c755ccec097d15c6b4ff8b246a89f1689 config: x86_64-randconfig-m001-20220613 (https://download.01.org/0day-ci/archive/20220615/202206151737.t3TxlR7I-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/c42b5be1ad82e8a991a3d35417c9e495e7eb4c93 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Stefan-Berger/tpm-Preserve-TPM-measurement-log-across-kexec/20220615-001510 git checkout c42b5be1ad82e8a991a3d35417c9e495e7eb4c93 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): ld: kernel/kexec_file.o: in function `kimage_file_alloc_init': >> kexec_file.c:(.text+0x880): undefined reference to `tpm_add_kexec_buffer' -- 0-DAY CI Kernel Test Service https://01.org/lkp