BPF_FUNC_override_return 9087 kernel/bpf/verifier.c if (insn->imm == BPF_FUNC_override_return) BPF_FUNC_override_return 754 kernel/trace/bpf_trace.c case BPF_FUNC_override_return: BPF_FUNC_override_return 115 tools/testing/selftests/bpf/bpf_helpers.h (void *) BPF_FUNC_override_return;