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
   6 char _license[] SEC("license") = "GPL";
   7
   8 SEC("socket")
   9 int 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 }