1// SPDX-License-Identifier: GPL-2.0-only 2/* Copyright (c) 2020 Facebook */ 3#include <stddef.h> 4#include <linux/bpf.h> 5#include <bpf/bpf_helpers.h> 6#include "bpf_misc.h" 7 8__attribute__ ((noinline)) 9void foo(struct __sk_buff *skb) 10{ 11 skb->tc_index = 0; 12} 13 14SEC("tc") 15__failure __msg("foo() doesn't return scalar") 16int global_func7(struct __sk_buff *skb) 17{ 18 foo(skb); 19 return 0; 20} 21