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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-29 03:09:24 +0000
committerDavid S. Miller <davem@davemloft.net>2010-11-08 13:50:08 -0800
commitfc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0 (patch)
treed45160f52eea37d4e5149d511c3c577bef253801 /net/decnet/dn_fib.c
parente4a7b93bd5d84e1e79917d024d17d745d190fc9a (diff)
downloadlinux-stericsson-fc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0.tar.gz
decnet: RCU conversion and get rid of dev_base_lock
While tracking dev_base_lock users, I found decnet used it in dnet_select_source(), but for a wrong purpose: Writers only hold RTNL, not dev_base_lock, so readers must use RCU if they cannot use RTNL. Adds an rcu_head in struct dn_ifaddr and handle proper RCU management. Adds __rcu annotation in dn_route as well. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/decnet/dn_fib.c')
-rw-r--r--net/decnet/dn_fib.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/decnet/dn_fib.c b/net/decnet/dn_fib.c
index 4ab96c15166d..0ef0a81bcd72 100644
--- a/net/decnet/dn_fib.c
+++ b/net/decnet/dn_fib.c
@@ -610,10 +610,12 @@ static void dn_fib_del_ifaddr(struct dn_ifaddr *ifa)
/* Scan device list */
rcu_read_lock();
for_each_netdev_rcu(&init_net, dev) {
- dn_db = dev->dn_ptr;
+ dn_db = rcu_dereference(dev->dn_ptr);
if (dn_db == NULL)
continue;
- for(ifa2 = dn_db->ifa_list; ifa2; ifa2 = ifa2->ifa_next) {
+ for (ifa2 = rcu_dereference(dn_db->ifa_list);
+ ifa2 != NULL;
+ ifa2 = rcu_dereference(ifa2->ifa_next)) {
if (ifa2->ifa_local == ifa->ifa_local) {
found_it = 1;
break;