tree: git://git.infradead.org/users/hch/misc.git nvme-pr-fix head: d5eadfcdbeb0e4f09c22b02955b587321c6300b1 commit: d5eadfcdbeb0e4f09c22b02955b587321c6300b1 [5/5] nvme: retry PR commands on path errors config: x86_64-randconfig-r033-20200816 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ab9fc8bae805c785066779e76e7846aabad5609e) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout d5eadfcdbeb0e4f09c22b02955b587321c6300b1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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/core.c:1647:8: error: implicit declaration of function 'nvme_find_path' [-Werror,-Wimplicit-function-declaration] ns = nvme_find_path(*head); ^ drivers/nvme/host/core.c:1647:6: warning: incompatible integer to pointer conversion assigning to 'struct nvme_ns *' from 'int' [-Wint-conversion] ns = nvme_find_path(*head); ^ ~~~~~~~~~~~~~~~~~~~~~ drivers/nvme/host/core.c:1684:25: error: implicit declaration of function 'nvme_find_path' [-Werror,-Wimplicit-function-declaration] struct nvme_ns *ns = nvme_find_path(head); ^ struct nvme_ns *ns = nvme_find_path(head); ^ ~~~~~~~~~~~~~~~~~~~~ 2 warnings and 2 errors generated. vim +1684 drivers/nvme/host/core.c 1663 1664 /* 1665 * Submit a command to a given gendisk, and if the disk is a multipath node 1666 * retry the command on a different path in case of a path error instead of 1667 * giving up after the first failure. 1668 */ 1669 static int nvme_submit_sync_cmd_disk(struct gendisk *disk, 1670 struct nvme_command *cmd, void *buffer, unsigned len) 1671 { 1672 if (!is_multipath_disk(disk)) { 1673 struct nvme_ns *ns = disk->private_data; 1674 1675 cmd->common.nsid = cpu_to_le32(ns->head->ns_id); 1676 return nvme_submit_sync_cmd(disk->queue, cmd, buffer, len); 1677 } else { 1678 struct nvme_ns_head *head = disk->private_data; 1679 int ret; 1680 1681 cmd->common.nsid = cpu_to_le32(head->ns_id); 1682 do { 1683 int srcu_idx = srcu_read_lock(&head->srcu); 1685 1686 if (ns) 1687 ret = nvme_submit_sync_cmd(ns->queue, cmd, 1688 buffer, len); 1689 else 1690 ret = -EWOULDBLOCK; 1691 srcu_read_unlock(&head->srcu, srcu_idx); 1692 } while (ret > 0 && nvme_is_path_error(ret)); 1693 1694 return ret; 1695 } 1696 } 1697 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org