tree: https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git xdp-traffic-gen-01 head: 3aaa72cb5c608f64b941ccc8d69caff51e89f67a commit: f0b693d10bc20904d60329b0a202d0aa2c666e8d [4/5] bpf: Add XDP_REDIRECT support to XDP for bpf_prog_run() config: hexagon-randconfig-r041-20211116 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git/commit/?id... git remote add toke https://git.kernel.org/pub/scm/linux/kernel/git/toke/linux.git git fetch --no-tags toke xdp-traffic-gen-01 git checkout f0b693d10bc20904d60329b0a202d0aa2c666e8d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=hexagon If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int bpf_test_run_init_ctx(struct bpf_test_timer *t, ^ net/bpf/test_run.c:133:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int bpf_test_run_init_ctx(struct bpf_test_timer *t, ^ static net/bpf/test_run.c:273:14: warning: no previous prototype for function 'bpf_fentry_test1' [-Wmissing-prototypes] int noinline bpf_fentry_test1(int a) ^ net/bpf/test_run.c:273:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test1(int a) ^ static net/bpf/test_run.c:278:14: warning: no previous prototype for function 'bpf_fentry_test2' [-Wmissing-prototypes] int noinline bpf_fentry_test2(int a, u64 b) ^ net/bpf/test_run.c:278:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test2(int a, u64 b) ^ static net/bpf/test_run.c:283:14: warning: no previous prototype for function 'bpf_fentry_test3' [-Wmissing-prototypes] int noinline bpf_fentry_test3(char a, int b, u64 c) ^ net/bpf/test_run.c:283:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test3(char a, int b, u64 c) ^ static net/bpf/test_run.c:288:14: warning: no previous prototype for function 'bpf_fentry_test4' [-Wmissing-prototypes] int noinline bpf_fentry_test4(void *a, char b, int c, u64 d) ^ net/bpf/test_run.c:288:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test4(void *a, char b, int c, u64 d) ^ static net/bpf/test_run.c:293:14: warning: no previous prototype for function 'bpf_fentry_test5' [-Wmissing-prototypes] int noinline bpf_fentry_test5(u64 a, void *b, short c, int d, u64 e) ^ net/bpf/test_run.c:293:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test5(u64 a, void *b, short c, int d, u64 e) ^ static net/bpf/test_run.c:298:14: warning: no previous prototype for function 'bpf_fentry_test6' [-Wmissing-prototypes] int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f) ^ net/bpf/test_run.c:298:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f) ^ static net/bpf/test_run.c:307:14: warning: no previous prototype for function 'bpf_fentry_test7' [-Wmissing-prototypes] int noinline bpf_fentry_test7(struct bpf_fentry_test_t *arg) ^ net/bpf/test_run.c:307:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test7(struct bpf_fentry_test_t *arg) ^ static net/bpf/test_run.c:312:14: warning: no previous prototype for function 'bpf_fentry_test8' [-Wmissing-prototypes] int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg) ^ net/bpf/test_run.c:312:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_fentry_test8(struct bpf_fentry_test_t *arg) ^ static net/bpf/test_run.c:317:14: warning: no previous prototype for function 'bpf_modify_return_test' [-Wmissing-prototypes] int noinline bpf_modify_return_test(int a, int *b) ^ net/bpf/test_run.c:317:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_modify_return_test(int a, int *b) ^ static net/bpf/test_run.c:323:14: warning: no previous prototype for function 'bpf_kfunc_call_test1' [-Wmissing-prototypes] u64 noinline bpf_kfunc_call_test1(struct sock *sk, u32 a, u64 b, u32 c, u64 d) ^ net/bpf/test_run.c:323:1: note: declare 'static' if the function is not intended to be used outside of this translation unit u64 noinline bpf_kfunc_call_test1(struct sock *sk, u32 a, u64 b, u32 c, u64 d) ^ static net/bpf/test_run.c:328:14: warning: no previous prototype for function 'bpf_kfunc_call_test2' [-Wmissing-prototypes] int noinline bpf_kfunc_call_test2(struct sock *sk, u32 a, u32 b) ^ net/bpf/test_run.c:328:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int noinline bpf_kfunc_call_test2(struct sock *sk, u32 a, u32 b) ^ static net/bpf/test_run.c:333:24: warning: no previous prototype for function 'bpf_kfunc_call_test3' [-Wmissing-prototypes] struct sock * noinline bpf_kfunc_call_test3(struct sock *sk) ^ net/bpf/test_run.c:333:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct sock * noinline bpf_kfunc_call_test3(struct sock *sk) ^ static 13 warnings generated. vim +/bpf_test_run_init_ctx +133 net/bpf/test_run.c 132 134 struct xdp_buff *new_ctx, 135 struct xdp_buff *orig_ctx) 136 { 137 size_t frm_len = orig_ctx->data_end - orig_ctx->data_meta; 138 u32 headroom = XDP_PACKET_HEADROOM; 139 struct page *page; 140 void *data; 141 142 page = page_pool_dev_alloc_pages(t->xdp.pp); 143 if (!page) 144 return -ENOMEM; 145 146 data = phys_to_virt(page_to_phys(page)); 147 memcpy(data + headroom, orig_ctx->data_meta, frm_len); 148 149 xdp_init_buff(new_ctx, PAGE_SIZE, &t->xdp.rxq); 150 xdp_prepare_buff(new_ctx, data, headroom, frm_len, true); 151 return 0; 152 } 153 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org