Hi Andrii, kernel test robot noticed the following build errors:
[auto build test ERROR on trace/for-next] url: https://github.com/intel-lab-lkp/linux/commits/Andrii-Nakryiko/bpf-decouple-BPF-link-attach-hook-and-BPF-program-sleepable-semantics/20241101-051131 base: https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next patch link: https://lore.kernel.org/r/20241031210938.1696639-2-andrii%40kernel.org patch subject: [PATCH trace/for-next 2/3] bpf: decouple BPF link/attach hook and BPF program sleepable semantics config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20241101/202411011244.lrxouj8p-...@intel.com/config) compiler: gcc-11 (Debian 11.3.0-12) 11.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241101/202411011244.lrxouj8p-...@intel.com/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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202411011244.lrxouj8p-...@intel.com/ All errors (new ones prefixed by >>): net/core/dev.c: In function 'bpf_xdp_link_attach': >> net/core/dev.c:9767:9: error: too few arguments to function 'bpf_link_init' 9767 | bpf_link_init(&link->link, BPF_LINK_TYPE_XDP, &bpf_xdp_link_lops, prog); | ^~~~~~~~~~~~~ In file included from include/linux/security.h:35, from include/net/scm.h:9, from include/linux/netlink.h:9, from include/uapi/linux/neighbour.h:6, from include/linux/netdevice.h:44, from net/core/dev.c:92: include/linux/bpf.h:2724:20: note: declared here 2724 | static inline void bpf_link_init(struct bpf_link *link, enum bpf_link_type type, | ^~~~~~~~~~~~~ vim +/bpf_link_init +9767 net/core/dev.c aa8d3a716b59db Andrii Nakryiko 2020-07-21 9744 aa8d3a716b59db Andrii Nakryiko 2020-07-21 9745 int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog) aa8d3a716b59db Andrii Nakryiko 2020-07-21 9746 { aa8d3a716b59db Andrii Nakryiko 2020-07-21 9747 struct net *net = current->nsproxy->net_ns; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9748 struct bpf_link_primer link_primer; bf4ea1d0b2cb22 Leon Hwang 2023-08-01 9749 struct netlink_ext_ack extack = {}; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9750 struct bpf_xdp_link *link; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9751 struct net_device *dev; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9752 int err, fd; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9753 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9754 rtnl_lock(); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9755 dev = dev_get_by_index(net, attr->link_create.target_ifindex); 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9756 if (!dev) { 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9757 rtnl_unlock(); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9758 return -EINVAL; 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9759 } aa8d3a716b59db Andrii Nakryiko 2020-07-21 9760 aa8d3a716b59db Andrii Nakryiko 2020-07-21 9761 link = kzalloc(sizeof(*link), GFP_USER); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9762 if (!link) { aa8d3a716b59db Andrii Nakryiko 2020-07-21 9763 err = -ENOMEM; 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9764 goto unlock; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9765 } aa8d3a716b59db Andrii Nakryiko 2020-07-21 9766 aa8d3a716b59db Andrii Nakryiko 2020-07-21 @9767 bpf_link_init(&link->link, BPF_LINK_TYPE_XDP, &bpf_xdp_link_lops, prog); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9768 link->dev = dev; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9769 link->flags = attr->link_create.flags; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9770 aa8d3a716b59db Andrii Nakryiko 2020-07-21 9771 err = bpf_link_prime(&link->link, &link_primer); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9772 if (err) { aa8d3a716b59db Andrii Nakryiko 2020-07-21 9773 kfree(link); 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9774 goto unlock; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9775 } aa8d3a716b59db Andrii Nakryiko 2020-07-21 9776 bf4ea1d0b2cb22 Leon Hwang 2023-08-01 9777 err = dev_xdp_attach_link(dev, &extack, link); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9778 rtnl_unlock(); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9779 aa8d3a716b59db Andrii Nakryiko 2020-07-21 9780 if (err) { 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9781 link->dev = NULL; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9782 bpf_link_cleanup(&link_primer); bf4ea1d0b2cb22 Leon Hwang 2023-08-01 9783 trace_bpf_xdp_link_attach_failed(extack._msg); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9784 goto out_put_dev; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9785 } aa8d3a716b59db Andrii Nakryiko 2020-07-21 9786 aa8d3a716b59db Andrii Nakryiko 2020-07-21 9787 fd = bpf_link_settle(&link_primer); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9788 /* link itself doesn't hold dev's refcnt to not complicate shutdown */ aa8d3a716b59db Andrii Nakryiko 2020-07-21 9789 dev_put(dev); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9790 return fd; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9791 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9792 unlock: 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9793 rtnl_unlock(); 5acc7d3e8d3428 Xuan Zhuo 2021-07-10 9794 aa8d3a716b59db Andrii Nakryiko 2020-07-21 9795 out_put_dev: aa8d3a716b59db Andrii Nakryiko 2020-07-21 9796 dev_put(dev); aa8d3a716b59db Andrii Nakryiko 2020-07-21 9797 return err; aa8d3a716b59db Andrii Nakryiko 2020-07-21 9798 } aa8d3a716b59db Andrii Nakryiko 2020-07-21 9799 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
