[kbuild-all] [tglx-devel:genirq 29/56] ERROR: modpost: "__irq_set_lockdep_class" undefined!

tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git genirq head: 53cc7c5b089bb7f673fc14f830c4a5d665812b1d commit: 625bfc682a550bc6ab8d05a49c0204f026a66aa3 [29/56] genirq: Move irq_set_lockdep_class() to core config: x86_64-randconfig-r015-20201209 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git/commit/?id... git remote add tglx-devel https://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git git fetch --no-tags tglx-devel genirq git checkout 625bfc682a550bc6ab8d05a49c0204f026a66aa3 # save the attached .config to linux build tree make 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; All errors (new ones prefixed by >>, old ones prefixed by <<): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org