tree:   https://github.com/cilium/linux.git pr/bpf-tc-links5
head:   7c3ffc4a0548d3177f68bc87af7c9775e5bcdb86
commit: d23123fce93d005f0c30e114da971359b0883cee [1/10] bpf: Add initial fd-based API to attach tc BPF programs
config: x86_64-rhel-8.3-kvm
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/cilium/linux/commit/d23123fce93d005f0c30e114da971359b0883cee
        git remote add cilium https://github.com/cilium/linux.git
        git fetch --no-tags cilium pr/bpf-tc-links5
        git checkout d23123fce93d005f0c30e114da971359b0883cee
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   ld: net/core/dev.o: in function `unregister_netdevice_many':
>> net/core/dev.c:10901: undefined reference to `dev_xtc_uninstall'


vim +10901 net/core/dev.c

 10844	
 10845	/**
 10846	 *	unregister_netdevice_many - unregister many devices
 10847	 *	@head: list of devices
 10848	 *
 10849	 *  Note: As most callers use a stack allocated list_head,
 10850	 *  we force a list_del() to make sure stack wont be corrupted later.
 10851	 */
 10852	void unregister_netdevice_many(struct list_head *head)
 10853	{
 10854		struct net_device *dev, *tmp;
 10855		LIST_HEAD(close_head);
 10856	
 10857		BUG_ON(dev_boot_phase);
 10858		ASSERT_RTNL();
 10859	
 10860		if (list_empty(head))
 10861			return;
 10862	
 10863		list_for_each_entry_safe(dev, tmp, head, unreg_list) {
 10864			/* Some devices call without registering
 10865			 * for initialization unwind. Remove those
 10866			 * devices and proceed with the remaining.
 10867			 */
 10868			if (dev->reg_state == NETREG_UNINITIALIZED) {
 10869				pr_debug("unregister_netdevice: device %s/%p never was registered\n",
 10870					 dev->name, dev);
 10871	
 10872				WARN_ON(1);
 10873				list_del(&dev->unreg_list);
 10874				continue;
 10875			}
 10876			dev->dismantle = true;
 10877			BUG_ON(dev->reg_state != NETREG_REGISTERED);
 10878		}
 10879	
 10880		/* If device is running, close it first. */
 10881		list_for_each_entry(dev, head, unreg_list)
 10882			list_add_tail(&dev->close_list, &close_head);
 10883		dev_close_many(&close_head, true);
 10884	
 10885		list_for_each_entry(dev, head, unreg_list) {
 10886			/* And unlink it from device chain. */
 10887			write_lock(&dev_base_lock);
 10888			unlist_netdevice(dev, false);
 10889			dev->reg_state = NETREG_UNREGISTERING;
 10890			write_unlock(&dev_base_lock);
 10891		}
 10892		flush_all_backlogs();
 10893	
 10894		synchronize_net();
 10895	
 10896		list_for_each_entry(dev, head, unreg_list) {
 10897			struct sk_buff *skb = NULL;
 10898	
 10899			/* Shutdown queueing discipline. */
 10900			dev_shutdown(dev);
 10901			dev_xtc_uninstall(dev);
 10902			dev_xdp_uninstall(dev);
 10903	
 10904			netdev_offload_xstats_disable_all(dev);
 10905	
 10906			/* Notify protocols, that we are about to destroy
 10907			 * this device. They should clean all the things.
 10908			 */
 10909			call_netdevice_notifiers(NETDEV_UNREGISTER, dev);
 10910	
 10911			if (!dev->rtnl_link_ops ||
 10912			    dev->rtnl_link_state == RTNL_LINK_INITIALIZED)
 10913				skb = rtmsg_ifinfo_build_skb(RTM_DELLINK, dev, ~0U, 0,
 10914							     GFP_KERNEL, NULL, 0);
 10915	
 10916			/*
 10917			 *	Flush the unicast and multicast chains
 10918			 */
 10919			dev_uc_flush(dev);
 10920			dev_mc_flush(dev);
 10921	
 10922			netdev_name_node_alt_flush(dev);
 10923			netdev_name_node_free(dev->name_node);
 10924	
 10925			if (dev->netdev_ops->ndo_uninit)
 10926				dev->netdev_ops->ndo_uninit(dev);
 10927	
 10928			if (skb)
 10929				rtmsg_ifinfo_send(skb, dev, GFP_KERNEL);
 10930	
 10931			/* Notifier chain MUST detach us all upper devices. */
 10932			WARN_ON(netdev_has_any_upper_dev(dev));
 10933			WARN_ON(netdev_has_any_lower_dev(dev));
 10934	
 10935			/* Remove entries from kobject tree */
 10936			netdev_unregister_kobject(dev);
 10937	#ifdef CONFIG_XPS
 10938			/* Remove XPS queueing entries */
 10939			netif_reset_xps_queues_gt(dev, 0);
 10940	#endif
 10941		}
 10942	
 10943		synchronize_net();
 10944	
 10945		list_for_each_entry(dev, head, unreg_list) {
 10946			netdev_put(dev, &dev->dev_registered_tracker);
 10947			net_set_todo(dev);
 10948		}
 10949	
 10950		list_del(head);
 10951	}
 10952	EXPORT_SYMBOL(unregister_netdevice_many);
 10953	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp