Hi Yonghong, kernel test robot noticed the following build warnings: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Yonghong-Song/bpf-Add-bpf_link-support-for-sk_msg-and-sk_skb-progs/20240320-015917 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20240319175406.2940628-1-yonghong.song%40linux.dev patch subject: [PATCH bpf-next v2 1/6] bpf: Add bpf_link support for sk_msg and sk_skb progs config: x86_64-randconfig-011-20240321 (https://download.01.org/0day-ci/archive/20240321/202403211543.wg8VXMiO-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240321/202403211543.wg8VXMiO-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/202403211543.wg8VXMiO-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): net/core/skmsg.c:1279:9: error: call to undeclared function 'sock_map_prog_update'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1279 | (void)sock_map_prog_update(sk_link->map, NULL, link->prog, | ^ net/core/skmsg.c:1281:3: error: call to undeclared function 'bpf_map_put_with_uref'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1281 | bpf_map_put_with_uref(sk_link->map); | ^ net/core/skmsg.c:1316:8: error: call to undeclared function 'sock_map_prog_update'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1316 | ret = sock_map_prog_update(sk_link->map, new_prog, old_prog, | ^ net/core/skmsg.c:1383:8: error: call to undeclared function 'bpf_map_get_with_uref'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1383 | map = bpf_map_get_with_uref(attr->link_create.target_fd); | ^ net/core/skmsg.c:1383:6: error: incompatible integer to pointer conversion assigning to 'struct bpf_map *' from 'int' [-Wint-conversion] 1383 | map = bpf_map_get_with_uref(attr->link_create.target_fd); | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/core/skmsg.c:1409:8: error: call to undeclared function 'sock_map_prog_update'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1409 | ret = sock_map_prog_update(map, prog, NULL, attach_type); | ^ net/core/skmsg.c:1420:2: error: call to undeclared function 'bpf_map_put_with_uref'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 1420 | bpf_map_put_with_uref(map); | ^ >> net/core/skmsg.c:1371:5: warning: no previous prototype for function 'bpf_sk_msg_skb_link_create' [-Wmissing-prototypes] 1371 | int bpf_sk_msg_skb_link_create(const union bpf_attr *attr, struct bpf_prog *prog) | ^ net/core/skmsg.c:1371:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 1371 | int bpf_sk_msg_skb_link_create(const union bpf_attr *attr, struct bpf_prog *prog) | ^ | static 1 warning and 7 errors generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for DRM_I915_DEBUG_GEM Depends on [n]: HAS_IOMEM [=y] && DRM_I915 [=y] && EXPERT [=y] && DRM_I915_WERROR [=n] Selected by [y]: - DRM_I915_DEBUG [=y] && HAS_IOMEM [=y] && DRM_I915 [=y] && EXPERT [=y] && !COMPILE_TEST [=n] vim +/bpf_sk_msg_skb_link_create +1371 net/core/skmsg.c 1370 > 1371 int bpf_sk_msg_skb_link_create(const union bpf_attr *attr, struct bpf_prog *prog) 1372 { 1373 struct bpf_link_primer link_primer; 1374 struct bpf_sk_msg_skb_link *sk_link; 1375 enum bpf_attach_type attach_type; 1376 enum bpf_link_type link_type; 1377 struct bpf_map *map; 1378 int ret; 1379 1380 if (attr->link_create.flags) 1381 return -EINVAL; 1382 > 1383 map = bpf_map_get_with_uref(attr->link_create.target_fd); -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
