tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head: 16040894b26af9f85d9395f072c53d76a44eba21
commit: e3e4712ec0961ed586a8db340bd994c4ad7f5dba [187/208] mpls: ip tunnel
support
reproduce:
# apt-get install sparse
git checkout e3e4712ec0961ed586a8db340bd994c4ad7f5dba
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> net/mpls/mpls_iptunnel.c:73:19: sparse: incompatible types in comparison
>> expression (different address spaces)
vim +73 net/mpls/mpls_iptunnel.c
57 /* Obtain the ttl */
58 if (skb->protocol == htons(ETH_P_IP)) {
59 ttl = ip_hdr(skb)->ttl;
60 rt = (struct rtable *)dst;
61 lwtstate = rt->rt_lwtstate;
62 } else if (skb->protocol == htons(ETH_P_IPV6)) {
63 ttl = ipv6_hdr(skb)->hop_limit;
64 rt6 = (struct rt6_info *)dst;
65 lwtstate = rt6->rt6i_lwtstate;
66 } else {
67 goto drop;
68 }
69
70 skb_orphan(skb);
71
72 /* Find the output device */
> 73 out_dev = rcu_dereference(dst->dev);
74 if (!mpls_output_possible(out_dev) ||
75 !lwtstate || skb_warn_if_lro(skb))
76 goto drop;
77
78 skb_forward_csum(skb);
79
80 tun_encap_info = mpls_lwtunnel_encap(lwtstate);
81
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0-DAY kernel test infrastructure Open Source Technology Center
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