Hi Andrii, 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/Andrii-Nakryiko/bpf-introduce-BPF-token-object/20230602-230448 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20230602150011.1657856-2-andrii%40kernel.org patch subject: [PATCH RESEND bpf-next 01/18] bpf: introduce BPF token object config: um-x86_64_defconfig (https://download.01.org/0day-ci/archive/20230603/202306030138.u9AeNgUk-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/59e6ef2000a056ce3386db8481e477e5abfbbe15 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Andrii-Nakryiko/bpf-introduce-BPF-token-object/20230602-230448 git checkout 59e6ef2000a056ce3386db8481e477e5abfbbe15 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=um SUBARCH=x86_64 olddefconfig make W=1 O=build_dir ARCH=um SUBARCH=x86_64 SHELL=/bin/bash kernel/ net/core/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202306030138.u9AeNgUk-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from kernel/fork.c:98: include/linux/bpf.h: In function 'bpf_token_new_fd': >> include/linux/bpf.h:2465:16: warning: returning 'int' from a function with return type 'struct bpf_token *' makes pointer from integer without a cast [-Wint-conversion] 2465 | return -EOPNOTSUPP; | ^ kernel/fork.c: At top level: kernel/fork.c:164:13: warning: no previous prototype for 'arch_release_task_struct' [-Wmissing-prototypes] 164 | void __weak arch_release_task_struct(struct task_struct *tsk) | ^~~~~~~~~~~~~~~~~~~~~~~~ kernel/fork.c:991:20: warning: no previous prototype for 'arch_task_cache_init' [-Wmissing-prototypes] 991 | void __init __weak arch_task_cache_init(void) { } | ^~~~~~~~~~~~~~~~~~~~ kernel/fork.c:1086:12: warning: no previous prototype for 'arch_dup_task_struct' [-Wmissing-prototypes] 1086 | int __weak arch_dup_task_struct(struct task_struct *dst, | ^~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/filter.h:9, from kernel/sysctl.c:35: include/linux/bpf.h: In function 'bpf_token_new_fd': >> include/linux/bpf.h:2465:16: warning: returning 'int' from a function with return type 'struct bpf_token *' makes pointer from integer without a cast [-Wint-conversion] 2465 | return -EOPNOTSUPP; | ^ -- In file included from include/linux/filter.h:9, from kernel/kallsyms.c:25: include/linux/bpf.h: In function 'bpf_token_new_fd': >> include/linux/bpf.h:2465:16: warning: returning 'int' from a function with return type 'struct bpf_token *' makes pointer from integer without a cast [-Wint-conversion] 2465 | return -EOPNOTSUPP; | ^ kernel/kallsyms.c: At top level: kernel/kallsyms.c:662:12: warning: no previous prototype for 'arch_get_kallsym' [-Wmissing-prototypes] 662 | int __weak arch_get_kallsym(unsigned int symnum, unsigned long *value, | ^~~~~~~~~~~~~~~~ -- In file included from include/linux/filter.h:9, from kernel/bpf/core.c:21: include/linux/bpf.h: In function 'bpf_token_new_fd': >> include/linux/bpf.h:2465:16: warning: returning 'int' from a function with return type 'struct bpf_token *' makes pointer from integer without a cast [-Wint-conversion] 2465 | return -EOPNOTSUPP; | ^ kernel/bpf/core.c: At top level: kernel/bpf/core.c:1638:12: warning: no previous prototype for 'bpf_probe_read_kernel' [-Wmissing-prototypes] 1638 | u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr) | ^~~~~~~~~~~~~~~~~~~~~ kernel/bpf/core.c:2075:6: warning: no previous prototype for 'bpf_patch_call_args' [-Wmissing-prototypes] 2075 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth) | ^~~~~~~~~~~~~~~~~~~ vim +2465 include/linux/bpf.h 2462 2463 static inline struct bpf_token *bpf_token_new_fd(struct bpf_token *token) 2464 { > 2465 return -EOPNOTSUPP; 2466 } 2467 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
