Hi Lorenzo, kernel test robot noticed the following build warnings: [auto build test WARNING on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Lorenzo-Bianconi/net-add-generic-percpu-page_pool-allocator/20240202-162516 base: net-next/main patch link: https://lore.kernel.org/r/1d34b717f8f842b9c3e9f70f0e8ffd245a5d2460.1706861261.git.lorenzo%40kernel.org patch subject: [PATCH v7 net-next 1/4] net: add generic percpu page_pool allocator config: x86_64-randconfig-121-20240203 (https://download.01.org/0day-ci/archive/20240203/202402032223.Imbb9JgJ-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240203/202402032223.Imbb9JgJ-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202402032223.Imbb9JgJ-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) net/core/dev.c:3364:23: sparse: sparse: incorrect type in argument 4 (different base types) @@ expected restricted __wsum [usertype] csum @@ got unsigned int @@ net/core/dev.c:3364:23: sparse: expected restricted __wsum [usertype] csum net/core/dev.c:3364:23: sparse: got unsigned int net/core/dev.c:3364:23: sparse: sparse: cast from restricted __wsum >> net/core/dev.c:11809:34: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected void const [noderef] __percpu *__vpp_verify @@ got struct page_pool * @@ net/core/dev.c:11809:34: sparse: expected void const [noderef] __percpu *__vpp_verify net/core/dev.c:11809:34: sparse: got struct page_pool * net/core/dev.c: note: in included file (through include/linux/smp.h, include/linux/lockdep.h, include/linux/spinlock.h, ...): include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true net/core/dev.c:205:9: sparse: sparse: context imbalance in 'unlist_netdevice' - different lock contexts for basic block include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true net/core/dev.c:3804:17: sparse: sparse: context imbalance in '__dev_queue_xmit' - different lock contexts for basic block include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true net/core/dev.c:5184:17: sparse: sparse: context imbalance in 'net_tx_action' - different lock contexts for basic block include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true include/linux/list.h:83:21: sparse: sparse: self-comparison always evaluates to true >> net/core/dev.c:11809:34: sparse: sparse: dereference of noderef expression vim +11809 net/core/dev.c 11722 11723 /* 11724 * This is called single threaded during boot, so no need 11725 * to take the rtnl semaphore. 11726 */ 11727 static int __init net_dev_init(void) 11728 { 11729 int i, rc = -ENOMEM; 11730 11731 BUG_ON(!dev_boot_phase); 11732 11733 net_dev_struct_check(); 11734 11735 if (dev_proc_init()) 11736 goto out; 11737 11738 if (netdev_kobject_init()) 11739 goto out; 11740 11741 INIT_LIST_HEAD(&ptype_all); 11742 for (i = 0; i < PTYPE_HASH_SIZE; i++) 11743 INIT_LIST_HEAD(&ptype_base[i]); 11744 11745 if (register_pernet_subsys(&netdev_net_ops)) 11746 goto out; 11747 11748 /* 11749 * Initialise the packet receive queues. 11750 */ 11751 11752 for_each_possible_cpu(i) { 11753 struct work_struct *flush = per_cpu_ptr(&flush_works, i); 11754 struct softnet_data *sd = &per_cpu(softnet_data, i); 11755 11756 INIT_WORK(flush, flush_backlog); 11757 11758 skb_queue_head_init(&sd->input_pkt_queue); 11759 skb_queue_head_init(&sd->process_queue); 11760 #ifdef CONFIG_XFRM_OFFLOAD 11761 skb_queue_head_init(&sd->xfrm_backlog); 11762 #endif 11763 INIT_LIST_HEAD(&sd->poll_list); 11764 sd->output_queue_tailp = &sd->output_queue; 11765 #ifdef CONFIG_RPS 11766 INIT_CSD(&sd->csd, rps_trigger_softirq, sd); 11767 sd->cpu = i; 11768 #endif 11769 INIT_CSD(&sd->defer_csd, trigger_rx_softirq, sd); 11770 spin_lock_init(&sd->defer_lock); 11771 11772 init_gro_hash(&sd->backlog); 11773 sd->backlog.poll = process_backlog; 11774 sd->backlog.weight = weight_p; 11775 11776 if (net_page_pool_create(i)) 11777 goto out; 11778 } 11779 11780 dev_boot_phase = 0; 11781 11782 /* The loopback device is special if any other network devices 11783 * is present in a network namespace the loopback device must 11784 * be present. Since we now dynamically allocate and free the 11785 * loopback device ensure this invariant is maintained by 11786 * keeping the loopback device as the first device on the 11787 * list of network devices. Ensuring the loopback devices 11788 * is the first device that appears and the last network device 11789 * that disappears. 11790 */ 11791 if (register_pernet_device(&loopback_net_ops)) 11792 goto out; 11793 11794 if (register_pernet_device(&default_device_ops)) 11795 goto out; 11796 11797 open_softirq(NET_TX_SOFTIRQ, net_tx_action); 11798 open_softirq(NET_RX_SOFTIRQ, net_rx_action); 11799 11800 rc = cpuhp_setup_state_nocalls(CPUHP_NET_DEV_DEAD, "net/dev:dead", 11801 NULL, dev_cpu_dead); 11802 WARN_ON(rc < 0); 11803 rc = 0; 11804 out: 11805 if (rc < 0) { 11806 for_each_possible_cpu(i) { 11807 struct page_pool *pp_ptr; 11808 11809 pp_ptr = per_cpu_ptr(system_page_pool, i); 11810 if (!pp_ptr) 11811 continue; 11812 11813 page_pool_destroy(pp_ptr); 11814 per_cpu(system_page_pool, i) = NULL; 11815 } 11816 } 11817 11818 return rc; 11819 } 11820 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
