LXR linux/tools/testing/selftests/bpf/progs/loop4.c

   1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (c) 2019 Facebook
   3#include <linux/bpf.h>
   4#include <bpf/bpf_helpers.h>
   5
   6char _license[] SEC("license") = "GPL";
   7
   8SEC("socket")
   9int combinations(volatile struct __sk_buff* skb)
  10{
  11        int ret = 0, i;
  12
  13#pragma nounroll
  14        for (i = 0; i < 20; i++)
  15                if (skb->len)
  16                        ret |= 1 << i;
  17        return ret;
  18}
  19