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SubjectRe: [PATCH] net: improve ipv4 performances
Hi Anton,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net/master]
[also build test WARNING on v4.16 next-20180329]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Anton-Gary-Ceph/net-improve-ipv4-performances/20180402-103807
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

>> net/bridge/br_private.h:690:15: sparse: restricted __be16 degrades to integer
net/bridge/br_private.h:694:15: sparse: restricted __be16 degrades to integer
--
>> net/bridge/br_multicast.c:66:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:69:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:96:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:99:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:171:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:175:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:96:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:99:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:581:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:584:14: sparse: restricted __be16 degrades to integer
>> net/bridge/br_multicast.c:66:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:69:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:96:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:99:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:96:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:99:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:1325:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:1328:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:1765:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:1769:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:1913:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:1917:14: sparse: restricted __be16 degrades to integer
>> net/bridge/br_private.h:690:15: sparse: restricted __be16 degrades to integer
net/bridge/br_private.h:694:15: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:2497:14: sparse: restricted __be16 degrades to integer
net/bridge/br_multicast.c:2532:14: sparse: restricted __be16 degrades to integer
--
net/core/filter.c:318:33: sparse: subtraction of functions? Share your drugs
net/core/filter.c:321:33: sparse: subtraction of functions? Share your drugs
net/core/filter.c:324:33: sparse: subtraction of functions? Share your drugs
net/core/filter.c:327:33: sparse: subtraction of functions? Share your drugs
net/core/filter.c:330:33: sparse: subtraction of functions? Share your drugs
net/core/filter.c:1184:39: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sock_filter const *filter @@ got struct sockstruct sock_filter const *filter @@
net/core/filter.c:1184:39: expected struct sock_filter const *filter
net/core/filter.c:1184:39: got struct sock_filter [noderef] <asn:1>*filter
net/core/filter.c:1286:39: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sock_filter const *filter @@ got struct sockstruct sock_filter const *filter @@
net/core/filter.c:1286:39: expected struct sock_filter const *filter
net/core/filter.c:1286:39: got struct sock_filter [noderef] <asn:1>*filter
net/core/filter.c:1547:43: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __wsum [usertype] diff @@ got unsigned lonrestricted __wsum [usertype] diff @@
net/core/filter.c:1547:43: expected restricted __wsum [usertype] diff
net/core/filter.c:1547:43: got unsigned long long [unsigned] [usertype] to
net/core/filter.c:1550:36: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __be16 [usertype] old @@ got unsigned lonrestricted __be16 [usertype] old @@
net/core/filter.c:1550:36: expected restricted __be16 [usertype] old
net/core/filter.c:1550:36: got unsigned long long [unsigned] [usertype] from
net/core/filter.c:1550:42: sparse: incorrect type in argument 3 (different base types) @@ expected restricted __be16 [usertype] new @@ got unsigned lonrestricted __be16 [usertype] new @@
net/core/filter.c:1550:42: expected restricted __be16 [usertype] new
net/core/filter.c:1550:42: got unsigned long long [unsigned] [usertype] to
net/core/filter.c:1553:36: sparse: incorrect type in argument 2 (different base types) @@ expected restricted __be32 [usertype] from @@ got unsigned lonrestricted __be32 [usertype] from @@
net/core/filter.c:1553:36: expected restricted __be32 [usertype] from
net/core/filter.c:1553:36: got unsigned long long [unsigned] [usertype] from
net/core/filter.c:1553:42: sparse: incorrect type in argument 3 (different base types) @@ expected restricted __be32 [usertype] to @@ got unsigned lonrestricted __be32 [usertype] to @@
net/core/filter.c:1553:42: expected restricted __be32 [usertype] to
net/core/filter.c:1553:42: got unsigned long long [unsigned] [usertype] to
net/core/filter.c:1598:59: sparse: incorrect type in argument 3 (different base types) @@ expected restricted __wsum [usertype] diff @@ got unsigned lonrestricted __wsum [usertype] diff @@
net/core/filter.c:1598:59: expected restricted __wsum [usertype] diff
net/core/filter.c:1598:59: got unsigned long long [unsigned] [usertype] to
net/core/filter.c:1601:52: sparse: incorrect type in argument 3 (different base types) @@ expected restricted __be16 [usertype] from @@ got unsigned lonrestricted __be16 [usertype] from @@
net/core/filter.c:1601:52: expected restricted __be16 [usertype] from
net/core/filter.c:1601:52: got unsigned long long [unsigned] [usertype] from
net/core/filter.c:1601:58: sparse: incorrect type in argument 4 (different base types) @@ expected restricted __be16 [usertype] to @@ got unsigned lonrestricted __be16 [usertype] to @@
net/core/filter.c:1601:58: expected restricted __be16 [usertype] to
net/core/filter.c:1601:58: got unsigned long long [unsigned] [usertype] to
net/core/filter.c:1604:52: sparse: incorrect type in argument 3 (different base types) @@ expected restricted __be32 [usertype] from @@ got unsigned lonrestricted __be32 [usertype] from @@
net/core/filter.c:1604:52: expected restricted __be32 [usertype] from
net/core/filter.c:1604:52: got unsigned long long [unsigned] [usertype] from
net/core/filter.c:1604:58: sparse: incorrect type in argument 4 (different base types) @@ expected restricted __be32 [usertype] to @@ got unsigned lonrestricted __be32 [usertype] to @@
net/core/filter.c:1604:58: expected restricted __be32 [usertype] to
net/core/filter.c:1604:58: got unsigned long long [unsigned] [usertype] to
net/core/filter.c:1650:28: sparse: incorrect type in return expression (different base types) @@ expected unsigned long long @@ got nsigned long long @@
net/core/filter.c:1650:28: expected unsigned long long
net/core/filter.c:1650:28: got restricted __wsum
net/core/filter.c:1672:35: sparse: incorrect type in return expression (different base types) @@ expected unsigned long long @@ got restricted unsigned long long @@
net/core/filter.c:1672:35: expected unsigned long long
net/core/filter.c:1672:35: got restricted __wsum [usertype] csum
>> net/core/filter.c:2244:14: sparse: restricted __be16 degrades to integer
net/core/filter.c:2246:14: sparse: restricted __be16 degrades to integer
--
>> include/linux/netdevice.h:4035:14: sparse: restricted __be16 degrades to integer
include/linux/netdevice.h:4037:14: sparse: restricted __be16 degrades to integer
>> net/core/skbuff.c:4646:14: sparse: restricted __be16 degrades to integer
net/core/skbuff.c:4650:14: sparse: restricted __be16 degrades to integer
--
>> include/net/netfilter/nf_queue.h:83:14: sparse: restricted __be16 degrades to integer
include/net/netfilter/nf_queue.h:89:14: sparse: restricted __be16 degrades to integer
>> include/net/netfilter/nf_queue.h:83:14: sparse: restricted __be16 degrades to integer
include/net/netfilter/nf_queue.h:89:14: sparse: restricted __be16 degrades to integer
--
>> net/netfilter/nf_tables_netdev.c:27:14: sparse: restricted __be16 degrades to integer
net/netfilter/nf_tables_netdev.c:30:14: sparse: restricted __be16 degrades to integer
--
>> include/net/netfilter/nf_queue.h:83:14: sparse: restricted __be16 degrades to integer
include/net/netfilter/nf_queue.h:89:14: sparse: restricted __be16 degrades to integer
--
>> net/netfilter/nf_flow_table_inet.c:14:14: sparse: restricted __be16 degrades to integer
net/netfilter/nf_flow_table_inet.c:16:14: sparse: restricted __be16 degrades to integer
--
>> net/openvswitch/conntrack.c:1113:14: sparse: restricted __be16 degrades to integer
net/openvswitch/conntrack.c:1116:14: sparse: restricted __be16 degrades to integer

vim +690 net/bridge/br_private.h

cc0fdd80 Linus Lüssing 2013-08-30 685
cc0fdd80 Linus Lüssing 2013-08-30 686 static inline bool br_multicast_querier_exists(struct net_bridge *br,
cc0fdd80 Linus Lüssing 2013-08-30 687 struct ethhdr *eth)
b00589af Linus Lüssing 2013-08-01 688 {
f9ba1e10 Anton Gary Ceph 2018-04-01 689 switch (__builtin_expect(eth->h_proto, ETH_P_IP)) {
cc0fdd80 Linus Lüssing 2013-08-30 @690 case (htons(ETH_P_IP)):
0888d5f3 daniel 2016-06-24 691 return __br_multicast_querier_exists(br,
0888d5f3 daniel 2016-06-24 692 &br->ip4_other_query, false);
cc0fdd80 Linus Lüssing 2013-08-30 693 #if IS_ENABLED(CONFIG_IPV6)
cc0fdd80 Linus Lüssing 2013-08-30 694 case (htons(ETH_P_IPV6)):
0888d5f3 daniel 2016-06-24 695 return __br_multicast_querier_exists(br,
0888d5f3 daniel 2016-06-24 696 &br->ip6_other_query, true);
cc0fdd80 Linus Lüssing 2013-08-30 697 #endif
cc0fdd80 Linus Lüssing 2013-08-30 698 default:
cc0fdd80 Linus Lüssing 2013-08-30 699 return false;
cc0fdd80 Linus Lüssing 2013-08-30 700 }
b00589af Linus Lüssing 2013-08-01 701 }
1080ab95 Nikolay Aleksandrov 2016-06-28 702

:::::: The code at line 690 was first introduced by commit
:::::: cc0fdd802859eaeb00e1c87dbb655594bed2844c bridge: separate querier and query timer into IGMP/IPv4 and MLD/IPv6 ones

:::::: TO: Linus Lüssing <linus.luessing@web.de>
:::::: CC: David S. Miller <davem@davemloft.net>

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

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