Hi Chris, kernel test robot noticed the following build errors: [auto build test ERROR on bluetooth-next/master] [also build test ERROR on next-20240529] [cannot apply to bluetooth/master linus/master v6.10-rc1] [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/Chris-Lu/Bluetooth-net-add-hci_iso_hdr-function-for-iso-data/20240529-143216 base: https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git master patch link: https://lore.kernel.org/r/20240529062946.5655-4-chris.lu%40mediatek.com patch subject: [PATCH v2 3/3] Bluetooth: btusb: mediatek: add MediaTek ISO data transmission function config: i386-randconfig-014-20240530 (https://download.01.org/0day-ci/archive/20240530/202405300602.AUh9Yu96-lkp@xxxxxxxxx/config) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240530/202405300602.AUh9Yu96-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/202405300602.AUh9Yu96-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: btmtk_isopkt_pad >>> referenced by btusb.c:2267 (drivers/bluetooth/btusb.c:2267) >>> drivers/bluetooth/btusb.o:(btusb_send_frame) in archive vmlinux.a -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
