Hi Florinel, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Florinel-Iordache/doc-net-add-ba... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 29a720c1042f469c8fea317cb5e7f496b116e07d config: mips-allyesconfig (attached as .config) compiler: mips-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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 >>, old ones prefixed by <<): drivers/net/phy/backplane/backplane.c: In function 'bp_kr_state_machine': 590 | struct backplane_device *bpdev; | ^~~~~ -- drivers/net/phy/backplane/link_training.c: In function 'lt_train_remote_tx': 557 | u64 lp_resp_time; | ^~~~~~~~~~~~ drivers/net/phy/backplane/link_training.c: In function 'lt_train_local_tx': 1143 | int request, old_ld_status; | ^~~~~~~~~~~~~ vim +/bpdev +590 drivers/net/phy/backplane/backplane.c 586 587 static void bp_kr_state_machine(struct work_struct *work) 588 { 589 struct delayed_work *dwork = to_delayed_work(work); 591 u32 kr_timeout = KR_TIMEOUT_1; 592 struct phy_device *phydev; 593 struct lane_device *lane; 594 bool start_train = false; 595 596 lane = container_of(dwork, struct lane_device, krwk); 597 if (!lane) 598 return; 599 600 bpdev = lane->bpdev; 601 phydev = lane->phydev; 602 603 if (!backplane_is_mode_kr(phydev->interface)) 604 return; 605 606 /* Check if equalization algorithm is installed */ 607 if (!lane->krln.eq_alg) 608 return; 609 610 /* Check if link training is used */ 611 if (!lane->krln.eq_alg->use_local_tx_training && 612 !lane->krln.eq_alg->use_remote_tx_training) 613 return; 614 615 mutex_lock(&lane->lane_lock); 616 switch (lane->krln.state) { 617 case DETECTING_LP: 618 start_train = detect_lp(lane); 619 break; 620 case TRAINED: 621 kr_timeout = KR_TIMEOUT_2; 622 if (!backplane_is_link_up(phydev)) { 623 kr_timeout = KR_TIMEOUT_1; 624 detect_hotplug(lane); 625 } 626 break; 627 } 628 629 if (start_train) 630 kr_train_step(lane); 631 632 mutex_unlock(&lane->lane_lock); 633 start_kr_state_machine(lane, kr_timeout); 634 } 635 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org