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1// SPDX-License-Identifier: GPL-2.0-only2/* 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