tree: git://git.infradead.org/users/hch/misc.git nvme-ioctl head: 35c6dd73314831078d08613ffface7a97333169c commit: 24d2cd71eb775d0009fa934171170f86bbe1c56d [14/15] nvme: split nvme_report_zones config: arm64-randconfig-r002-20210519 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8e93d10633d751a3e9169bf9fa68326925ffa097) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu git remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc nvme-ioctl git checkout 24d2cd71eb775d0009fa934171170f86bbe1c56d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): drivers/nvme/host/zns.c:247:7: error: implicit declaration of function 'nvme_find_path' [-Werror,-Wimplicit-function-declaration] ns = nvme_find_path(head); ^ ns = nvme_find_path(head); ^ ~~~~~~~~~~~~~~~~~~~~ 1 warning and 1 error generated. vim +247 drivers/nvme/host/zns.c 238 239 int nvme_ns_head_report_zones(struct gendisk *disk, sector_t sector, 240 unsigned int nr_zones, report_zones_cb cb, void *data) 241 { 242 struct nvme_ns_head *head = disk->private_data; 243 struct nvme_ns *ns; 244 int srcu_idx, ret = -EWOULDBLOCK; 245 246 srcu_idx = srcu_read_lock(&head->srcu); 248 if (ns) 249 ret = nvme_ns_report_zones(ns, sector, nr_zones, cb, data); 250 srcu_read_unlock(&head->srcu, srcu_idx); 251 return ret; 252 } 253 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org