netdev - Re: [PATCH net-next v2 3/5] bpf: BPF for lightweight tunnel encapsulation

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Date:   Tue, 1 Nov 2016 10:39:47 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Thomas Graf <tgraf@...g.ch>
Cc:     kbuild-all@...org, davem@...emloft.net,
        alexei.starovoitov@...il.com, daniel@...earbox.net,
        tom@...bertland.com, roopa@...ulusnetworks.com,
        netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 3/5] bpf: BPF for lightweight tunnel
 encapsulation

Hi Thomas,

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Thomas-Graf/bpf-BPF-for-lightweight-tunnel-encapsulation/20161101-084038
config: x86_64-randconfig-s0-11010954 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   net/core/lwt_bpf.c: In function 'bpf_lwt_lookup6':
>> net/core/lwt_bpf.c:132: warning: initialized field with side-effects overwritten
   net/core/lwt_bpf.c:132: warning: (near initialization for 'fl6')

vim +132 net/core/lwt_bpf.c

   116		}
   117	
   118		return dst->lwtstate->orig_input(skb);
   119	}
   120	
   121	#if IS_ENABLED(CONFIG_IPV6)
   122	static struct dst_entry *bpf_lwt_lookup6(struct net *net, struct sk_buff *skb,
   123						 struct bpf_lwt *bpf)
   124	{
   125		struct ipv6hdr *ip6h = ipv6_hdr(skb);
   126		struct dst_entry *dst;
   127		struct flowi6 fl6 = {
   128			.daddr = ip6h->daddr,
   129			.saddr = ip6h->saddr,
   130			.flowlabel = ip6_flowinfo(ip6h),
   131			.flowi6_mark = skb->mark,
 > 132			.flowi6_proto = ip6h->nexthdr,
   133			.flowi6_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0,
   134		};
   135	
   136		dst = ip6_route_output(net, skb->sk, &fl6);
   137		if (unlikely(dst->error)) {
   138			int err = dst->error;
   139			dst_release(dst);
   140			return ERR_PTR(err);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/gzip" (27506 bytes)