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Subject[jolsa-perf:bpf/batch 13/29] kernel/bpf/core.c:2287:3: error: implicit declaration of function 'bpf_tramp_detach'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/batch
head: 5f1f613266bf58f8424a93e1f8b99c4ac8fa6c2b
commit: c04eb2ad90ed0981f4dc7d04249a9c84726f9ef0 [13/29] bpf: Add bpf_tramp_attach layer for trampoline attachment
config: um-i386_defconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=c04eb2ad90ed0981f4dc7d04249a9c84726f9ef0
git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
git fetch --no-tags jolsa-perf bpf/batch
git checkout c04eb2ad90ed0981f4dc7d04249a9c84726f9ef0
# save the attached .config to linux build tree
make W=1 ARCH=um SUBARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

kernel/bpf/core.c:1368:12: warning: no previous prototype for 'bpf_probe_read_kernel' [-Wmissing-prototypes]
1368 | u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
| ^~~~~~~~~~~~~~~~~~~~~
kernel/bpf/core.c:1811:6: warning: no previous prototype for 'bpf_patch_call_args' [-Wmissing-prototypes]
1811 | void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth)
| ^~~~~~~~~~~~~~~~~~~
kernel/bpf/core.c: In function 'bpf_prog_free_deferred':
>> kernel/bpf/core.c:2287:3: error: implicit declaration of function 'bpf_tramp_detach' [-Werror=implicit-function-declaration]
2287 | bpf_tramp_detach(aux->dst_attach);
| ^~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors


vim +/bpf_tramp_detach +2287 kernel/bpf/core.c

2268
2269 static void bpf_prog_free_deferred(struct work_struct *work)
2270 {
2271 struct bpf_prog_aux *aux;
2272 int i;
2273
2274 aux = container_of(work, struct bpf_prog_aux, work);
2275 #ifdef CONFIG_BPF_SYSCALL
2276 bpf_free_kfunc_btf_tab(aux->kfunc_btf_tab);
2277 #endif
2278 bpf_free_used_maps(aux);
2279 bpf_free_used_btfs(aux);
2280 if (bpf_prog_is_dev_bound(aux))
2281 bpf_prog_offload_destroy(aux->prog);
2282 #ifdef CONFIG_PERF_EVENTS
2283 if (aux->prog->has_callchain_buf)
2284 put_callchain_buffers();
2285 #endif
2286 if (aux->dst_attach)
> 2287 bpf_tramp_detach(aux->dst_attach);
2288 for (i = 0; i < aux->func_cnt; i++) {
2289 /* We can just unlink the subprog poke descriptor table as
2290 * it was originally linked to the main program and is also
2291 * released along with it.
2292 */
2293 aux->func[i]->aux->poke_tab = NULL;
2294 bpf_jit_free(aux->func[i]);
2295 }
2296 if (aux->func_cnt) {
2297 kfree(aux->func);
2298 bpf_prog_unlock_free(aux->prog);
2299 } else {
2300 bpf_jit_free(aux->prog);
2301 }
2302 }
2303

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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