tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/batch head: c01d0e8916f27a4ef956b683f46eff53b2e17707 commit: 177c965997379f586e507b97f54088f42866dded [10/16] bpf: Add BPF_TRAMPOLINE_BATCH_DETACH support config: x86_64-randconfig-s022-20201021 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id... 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 177c965997379f586e507b97f54088f42866dded # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from arch/x86/include/asm/bug.h:93, from include/linux/bug.h:5, from include/linux/cpumask.h:14, from arch/x86/include/asm/cpumask.h:5, from arch/x86/include/asm/msr.h:11, from arch/x86/include/asm/processor.h:22, from arch/x86/include/asm/timex.h:5, from include/linux/timex.h:65, from include/linux/time32.h:13, from include/linux/time.h:73, from include/linux/ktime.h:24, from include/linux/timer.h:6, from include/linux/workqueue.h:9, from include/linux/bpf.h:9, from kernel/bpf/syscall.c:4: kernel/bpf/syscall.c: In function 'bpf_tracing_link_release': 2507 | WARN_ON_ONCE(bpf_trampoline_unlink_prog(link->prog, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/bug.h:102:25: note: in definition of macro 'WARN_ON_ONCE' 102 | int __ret_warn_on = !!(condition); \ | ^~~~~~~~~ In file included from kernel/bpf/syscall.c:4: include/linux/bpf.h:712:19: note: declared here 712 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/syscall.c: In function 'bpf_trampoline_batch': kernel/bpf/syscall.c:2919:10: error: implicit declaration of function 'bpf_trampoline_batch_alloc'; did you mean 'bpf_trampoline_batch'? [-Werror=implicit-function-declaration] 2919 | batch = bpf_trampoline_batch_alloc(count); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ | bpf_trampoline_batch kernel/bpf/syscall.c:2919:8: warning: assignment to 'struct bpf_trampoline_batch *' from 'int' makes pointer from integer without a cast [-Wint-conversion] 2919 | batch = bpf_trampoline_batch_alloc(count); | ^ kernel/bpf/syscall.c:2960:4: error: too many arguments to function 'bpf_trampoline_unlink_prog' 2960 | bpf_trampoline_unlink_prog(link->prog, tr_link->trampoline, batch); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from kernel/bpf/syscall.c:4: include/linux/bpf.h:712:19: note: declared here 712 | static inline int bpf_trampoline_unlink_prog(struct bpf_prog *prog, | ^~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/bpf/syscall.c:2966:9: error: implicit declaration of function 'register_ftrace_direct_ips'; did you mean 'register_ftrace_direct'? [-Werror=implicit-function-declaration] 2966 | ret = register_ftrace_direct_ips(batch->ips, batch->addrs, batch->idx); | ^~~~~~~~~~~~~~~~~~~~~~~~~~ | register_ftrace_direct 2968 | ret = unregister_ftrace_direct_ips(batch->ips, batch->addrs, batch->idx); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ | unregister_ftrace_direct kernel/bpf/syscall.c:2975:2: error: implicit declaration of function 'bpf_trampoline_batch_free'; did you mean 'bpf_trampoline_batch'? [-Werror=implicit-function-declaration] 2975 | bpf_trampoline_batch_free(batch); | ^~~~~~~~~~~~~~~~~~~~~~~~~ | bpf_trampoline_batch cc1: some warnings being treated as errors vim +/bpf_trampoline_unlink_prog +2507 kernel/bpf/syscall.c 70ed506c3bbcfa8 Andrii Nakryiko 2020-03-02 2501 70ed506c3bbcfa8 Andrii Nakryiko 2020-03-02 2502 static void bpf_tracing_link_release(struct bpf_link *link) babf3164095b067 Andrii Nakryiko 2020-03-09 2503 { 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2504 struct bpf_tracing_link *tr_link = 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2505 container_of(link, struct bpf_tracing_link, link); 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2506 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 @2507 WARN_ON_ONCE(bpf_trampoline_unlink_prog(link->prog, 177c965997379f5 Jiri Olsa 2020-10-16 2508 tr_link->trampoline, NULL)); 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2509 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2510 bpf_trampoline_put(tr_link->trampoline); 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2511 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2512 /* tgt_prog is NULL if target is a kernel function */ 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2513 if (tr_link->tgt_prog) 3aac1ead5eb6b76 Toke Høiland-Jørgensen 2020-09-29 2514 bpf_prog_put(tr_link->tgt_prog); babf3164095b067 Andrii Nakryiko 2020-03-09 2515 } babf3164095b067 Andrii Nakryiko 2020-03-09 2516 :::::: The code at line 2507 was first introduced by commit :::::: 3aac1ead5eb6b76f3d2b8d111e6de1c2de23fb34 bpf: Move prog->aux->linked_prog and trampoline into bpf_link on attach :::::: TO: Toke Høiland-Jørgensen <toke(a)redhat.com&gt; :::::: CC: Alexei Starovoitov <ast(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org