On Jun 8, 2021, at 2:30 PM, kernel test robot <lkp(a)intel.com&gt; wrote: tree: git://git.infradead.org/nvme.git nvme-5.14 head: b0386eb167134d958f1876a1a7e39e113385c516 commit: a854c5eb4e959f0dfc6e1c22b51128ac68bc051c [27/28] nvme-pci: use helper for ctrl sgl check config: sparc-randconfig-r024-20210608 (attached as .config) compiler: sparc-linux-gcc (GCC) 9.3.0 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 git remote add linux-nvme git://git.infradead.org/nvme.git git fetch --no-tags linux-nvme nvme-5.14 git checkout a854c5eb4e959f0dfc6e1c22b51128ac68bc051c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/nvme/host/pci.c: In function 'nvme_pci_use_sgls': >> drivers/nvme/host/pci.c:539:7: error: implicit declaration of function 'nvme_ctrl_sgl_supported' [-Werror=implicit-function-declaration] 539 | if (!nvme_ctrl_sgl_supported(&dev->ctrl)) | ^~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/nvme_ctrl_sgl_supported +539 drivers/nvme/host/pci.c 530 531 static inline bool nvme_pci_use_sgls(struct nvme_dev *dev, struct request *req) 532 { 533 struct nvme_iod *iod = blk_mq_rq_to_pdu(req); 534 int nseg = blk_rq_nr_phys_segments(req); 535 unsigned int avg_seg_size; 536 537 avg_seg_size = DIV_ROUND_UP(blk_rq_payload_bytes(req), nseg); 538 > 539 if (!nvme_ctrl_sgl_supported(&dev->ctrl)) 540 return false; 541 if (!iod->nvmeq->qid) 542 return false; 543 if (!sgl_threshold || avg_seg_size < sgl_threshold) 544 return false; 545 return true; 546 } 547 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org <.config.gz>