tree: https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git auth.v4 head: d22f44dbe36eb82041e9e28db6a767c55c8d790e commit: d66b27a87d6a66eb707dd21d4c9f4efc6c6f2599 [6/11] nvme: Implement In-Band authentication config: nios2-allyesconfig (attached as .config) compiler: nios2-linux-gcc (GCC) 10.3.0 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/hare/scsi-devel.git/commi... git remote add hare-scsi-devel https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git git fetch --no-tags hare-scsi-devel auth.v4 git checkout d66b27a87d6a66eb707dd21d4c9f4efc6c6f2599 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=nios2 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/auth.c:440:5: warning: no previous prototype for 'nvme_auth_select_hash' [-Wmissing-prototypes] 440 | int nvme_auth_select_hash(struct nvme_ctrl *ctrl, | ^~~~~~~~~~~~~~~~~~~~~ drivers/nvme/host/auth.c:591:5: warning: no previous prototype for 'nvme_auth_generate_key' [-Wmissing-prototypes] 591 | int nvme_auth_generate_key(struct nvme_ctrl *ctrl, | ^~~~~~~~~~~~~~~~~~~~~~ 647 | void nvme_auth_free(struct nvme_dhchap_context *chap) | ^~~~~~~~~~~~~~ vim +/nvme_auth_free +647 drivers/nvme/host/auth.c 646 648 { 649 if (chap->shash_tfm) 650 crypto_free_shash(chap->shash_tfm); 651 if (chap->key) 652 kfree(chap->key); 653 if (chap->ctrl_key) 654 kfree(chap->ctrl_key); 655 if (chap->host_key) 656 kfree(chap->host_key); 657 if (chap->sess_key) 658 kfree(chap->sess_key); 659 kfree(chap); 660 } 661 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org