tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-5.15/drivers
head:   6e4df4c6488165637b95b9701cc862a42a3836ba
commit: fad7cd3310db3099f95dd34312c77740fbc455e5 [41/47] nbd: add the check to prevent overflow in __nbd_ioctl()
config: riscv-randconfig-r012-20210814 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 62df4df41c939205b2dc0a2a3bfb75b8c1ed74fa)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/commit/?id=fad7cd3310db3099f95dd34312c77740fbc455e5
        git remote add block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
        git fetch --no-tags block for-5.15/drivers
        git checkout fad7cd3310db3099f95dd34312c77740fbc455e5
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=riscv SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: __mulodi4
   >>> referenced by nbd.c
   >>>               block/nbd.o:(nbd_ioctl) in archive drivers/built-in.a

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org