Hi Heiner, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 39676dfe52331dba909c617f213fdb21015c8d10 commit: 18764b883e157e28126b54e7d4ba9dd487d5bf54 [9336/10295] r8169: add support for LED's on RTL8168/RTL8101 config: mips-randconfig-r003-20230302 (https://download.01.org/0day-ci/archive/20231228/202312281159.9TPeXbNd-lkp@xxxxxxxxx/config) compiler: mips-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231228/202312281159.9TPeXbNd-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/202312281159.9TPeXbNd-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): mips-linux-ld: kernel/kexec_core.o: in function `kimage_free': kernel/kexec_core.c:(.text+0x1208): undefined reference to `machine_kexec_cleanup' mips-linux-ld: kernel/kexec_core.o: in function `__crash_kexec': kernel/kexec_core.c:(.text+0x16d4): undefined reference to `machine_crash_shutdown' mips-linux-ld: kernel/kexec_core.c:(.text+0x16dc): undefined reference to `machine_kexec' mips-linux-ld: kernel/kexec_core.o: in function `kernel_kexec': kernel/kexec_core.c:(.text+0x1bf8): undefined reference to `machine_shutdown' mips-linux-ld: kernel/kexec_core.c:(.text+0x1c08): undefined reference to `machine_kexec' mips-linux-ld: drivers/net/ethernet/realtek/r8169_leds.o: in function `rtl8168_init_leds': >> drivers/net/ethernet/realtek/r8169_leds.c:(.text+0x2b8): undefined reference to `devm_led_classdev_register_ext' pahole: .tmp_vmlinux.btf: Invalid argument .btf.vmlinux.bin.o: file not recognized: file format not recognized -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki