On Wed, 2015-09-30 at 12:01 +0800, kbuild test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git
> master
> head: e6934f3ec00b04234acb24a1a2c28af59763d3b5
> commit: a00e74442bac5ad19a929d097370da7e07540ea6 [414/428] tcp/dccp: constify
> send_synack and send_reset socket argument
> config: avr32-atngw100_defconfig (attached as .config)
> reproduce:
> wget
> https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross
> -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> git checkout a00e74442bac5ad19a929d097370da7e07540ea6
> # save the attached .config to linux build tree
> make.cross ARCH=avr32
>
> All warnings (new ones prefixed by >>):
>
> net/ipv6/tcp_ipv6.c: In function 'tcp_v6_reqsk_send_ack':
> >> net/ipv6/tcp_ipv6.c:930: warning: passing argument 1 of
> >> 'tcp_v6_md5_do_lookup' discards qualifiers from pointer target type
> net/ipv6/tcp_ipv6.c:926: warning: passing argument 1 of
> 'tcp_v6_md5_do_lookup' discards qualifiers from pointer target type
>
> vim +/tcp_v6_md5_do_lookup +930 net/ipv6/tcp_ipv6.c
>
> 9c76a114b Wang Yufen 2014-03-29 914
> tcptw->tw_ts_recent, tw->tw_bound_dev_if, tcp_twsk_md5_key(tcptw),
> 21858cd02 Florent Fourcot 2015-05-16 915
> tw->tw_tclass, cpu_to_be32(tw->tw_flowlabel));
> ^1da177e4 Linus Torvalds 2005-04-16 916
> 8feaf0c0a Arnaldo Carvalho de Melo 2005-08-09 917 inet_twsk_put(tw);
> ^1da177e4 Linus Torvalds 2005-04-16 918 }
> ^1da177e4 Linus Torvalds 2005-04-16 919
> a00e74442 Eric Dumazet 2015-09-29 920 static void
> tcp_v6_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb,
> 6edafaaf6 Gui Jianfeng 2008-08-06 921
> struct request_sock *req)
> ^1da177e4 Linus Torvalds 2005-04-16 922 {
> 3a19ce0ee Daniel Lee 2014-05-11 923 /* sk->sk_state ==
> TCP_LISTEN -> for regular TCP_SYN_RECV
> 3a19ce0ee Daniel Lee 2014-05-11 924 * sk->sk_state ==
> TCP_SYN_RECV -> for Fast Open.
> 3a19ce0ee Daniel Lee 2014-05-11 925 */
> 0f85feae6 Eric Dumazet 2014-12-09 926 tcp_v6_send_ack(sk,
> skb, (sk->sk_state == TCP_LISTEN) ?
> 3a19ce0ee Daniel Lee 2014-05-11 927
> tcp_rsk(req)->snt_isn + 1 : tcp_sk(sk)->snd_nxt,
> 0f85feae6 Eric Dumazet 2014-12-09 928
> tcp_rsk(req)->rcv_nxt, req->rcv_wnd,
> 0f85feae6 Eric Dumazet 2014-12-09 929
> tcp_time_stamp, req->ts_recent, sk->sk_bound_dev_if,
> 1d13a96c7 Florent Fourcot 2014-01-16 @930
> tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr),
> 1d13a96c7 Florent Fourcot 2014-01-16 931 0, 0);
> ^1da177e4 Linus Torvalds 2005-04-16 932 }
> ^1da177e4 Linus Torvalds 2005-04-16 933
> ^1da177e4 Linus Torvalds 2005-04-16 934
> ^1da177e4 Linus Torvalds 2005-04-16 935 static struct sock
> *tcp_v6_hnd_req(struct sock *sk, struct sk_buff *skb)
> ^1da177e4 Linus Torvalds 2005-04-16 936 {
> aa8223c7b Arnaldo Carvalho de Melo 2007-04-10 937 const struct tcphdr *th
> = tcp_hdr(skb);
> 52452c542 Eric Dumazet 2015-03-19 938 struct request_sock
> *req;
>
> :::::: The code at line 930 was first introduced by commit
> :::::: 1d13a96c74fc4802a775189ddb58bc6469ffdaa3 ipv6: tcp: fix flowlabel
> value in ACK messages send from TIME_WAIT
>
> :::::: TO: Florent Fourcot <florent.four...@enst-bretagne.fr>
> :::::: CC: David S. Miller <da...@davemloft.net>
>
> ---
Thanks, probably a matter of applying this patch.
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 0ac64f47f8821ce7da103ecc7391ba7e..2ae95e1d03e1c0d5149c9f6fa7cf94d9 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -82,7 +82,7 @@ static const struct inet_connection_sock_af_ops ipv6_specific;
static const struct tcp_sock_af_ops tcp_sock_ipv6_specific;
static const struct tcp_sock_af_ops tcp_sock_ipv6_mapped_specific;
#else
-static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(struct sock *sk,
+static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(const struct sock *sk,
const struct in6_addr *addr)
{
return NULL;
--
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