Hi Tejun, kernel test robot noticed the following build errors: [auto build test ERROR on linux/master] [also build test ERROR on linus/master next-20231110] [cannot apply to tip/sched/core tj-cgroup/for-next v6.6] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Tejun-Heo/sched-Restructure-sched_class-order-sanity-checks-in-sched_init/20231111-145751 base: linux/master patch link: https://lore.kernel.org/r/20231111024835.2164816-14-tj%40kernel.org patch subject: [PATCH 13/36] sched_ext: Add scx_simple and scx_example_qmap example schedulers reproduce: (https://download.01.org/0day-ci/archive/20231112/202311121239.GTR1obNe-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202311121239.GTR1obNe-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> Makefile:83: *** Cannot find a vmlinux for VMLINUX_BTF at any of " ../../vmlinux /sys/kernel/btf/vmlinux /boot/vmlinux-5.9.0-0.bpo.2-amd64". Stop. vim +83 Makefile ^1da177e4c3f41 Linus Torvalds 2005-04-16 81 ^1da177e4c3f41 Linus Torvalds 2005-04-16 82 ifeq ("$(origin V)", "command line") ^1da177e4c3f41 Linus Torvalds 2005-04-16 @83 KBUILD_VERBOSE = $(V) ^1da177e4c3f41 Linus Torvalds 2005-04-16 84 endif ^1da177e4c3f41 Linus Torvalds 2005-04-16 85 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki