Hi Kui-Feng, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Kui-Feng-Lee/bpf-enable-the-open-operator-on-a-pinned-path-of-a-struct_osp-link/20240417-082736 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20240417002513.1534535-2-thinker.li%40gmail.com patch subject: [PATCH bpf-next 1/2] bpf: enable the "open" operator on a pinned path of a struct_osp link. config: arm-aspeed_g5_defconfig (https://download.01.org/0day-ci/archive/20240418/202404181413.1uMDy1xi-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240418/202404181413.1uMDy1xi-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/202404181413.1uMDy1xi-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: kernel/bpf/syscall.o: in function `bpf_link_open': >> kernel/bpf/syscall.c:3117:(.text+0xb70): undefined reference to `bpffs_struct_ops_link_open' vim +3117 kernel/bpf/syscall.c 3110 3111 /* Support opening pinned links */ 3112 static int bpf_link_open(struct inode *inode, struct file *filp) 3113 { 3114 struct bpf_link *link = inode->i_private; 3115 3116 if (link->type == BPF_LINK_TYPE_STRUCT_OPS) > 3117 return bpffs_struct_ops_link_open(inode, filp); 3118 3119 return -EOPNOTSUPP; 3120 } 3121 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
