From: kbuild test robot <fengguang.wu@intel.com>
To: Eric Dumazet <edumazet@google.com>
Cc: kbuild-all@01.org, netdev@vger.kernel.org
Subject: [net-next:master 58/68] net/ipv4/udp.c:1693:9: sparse: incompatible types in comparison expression (different address spaces)
Date: Tue, 5 Apr 2016 12:38:34 +0800 [thread overview]
Message-ID: <201604051231.l9wUsxHm%fengguang.wu@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master
head: 15f41e2ba13a6726632e44b1180e805a61e470ad
commit: ca065d0cf80fa547724440a8bf37f1e674d917c0 [58/68] udp: no longer use SLAB_DESTROY_BY_RCU
reproduce:
# apt-get install sparse
git checkout ca065d0cf80fa547724440a8bf37f1e674d917c0
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
include/linux/compiler.h:232:8: sparse: attribute 'no_sanitize_address': unknown attribute
>> net/ipv4/udp.c:1693:9: sparse: incompatible types in comparison expression (different address spaces)
>> net/ipv4/udp.c:1693:9: sparse: incompatible types in comparison expression (different address spaces)
--
include/linux/compiler.h:232:8: sparse: attribute 'no_sanitize_address': unknown attribute
>> net/ipv6/udp.c:743:9: sparse: incompatible types in comparison expression (different address spaces)
>> net/ipv6/udp.c:743:9: sparse: incompatible types in comparison expression (different address spaces)
vim +1693 net/ipv4/udp.c
1677 struct udp_hslot *hslot = udp_hashslot(udptable, net, hnum);
1678 unsigned int hash2 = 0, hash2_any = 0, use_hash2 = (hslot->count > 10);
1679 unsigned int offset = offsetof(typeof(*sk), sk_node);
1680 int dif = skb->dev->ifindex;
1681 struct hlist_node *node;
1682 struct sk_buff *nskb;
1683
1684 if (use_hash2) {
1685 hash2_any = udp4_portaddr_hash(net, htonl(INADDR_ANY), hnum) &
1686 udp_table.mask;
1687 hash2 = udp4_portaddr_hash(net, daddr, hnum) & udp_table.mask;
1688 start_lookup:
1689 hslot = &udp_table.hash2[hash2];
1690 offset = offsetof(typeof(*sk), __sk_common.skc_portaddr_node);
1691 }
1692
> 1693 sk_for_each_entry_offset_rcu(sk, node, &hslot->head, offset) {
1694 if (!__udp_is_mcast_sock(net, sk, uh->dest, daddr,
1695 uh->source, saddr, dif, hnum))
1696 continue;
1697
1698 if (!first) {
1699 first = sk;
1700 continue;
1701 }
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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