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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-29 07:09:24 +0400
committerDavid S. Miller <davem@davemloft.net>2010-11-09 00:50:08 +0300
commitfc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0 (patch)
treed45160f52eea37d4e5149d511c3c577bef253801 /net/decnet/af_decnet.c
parente4a7b93bd5d84e1e79917d024d17d745d190fc9a (diff)
downloadlinux-fc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0.tar.xz
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/af_decnet.c')
-rw-r--r--net/decnet/af_decnet.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index d6b93d19790f..18b8a2cbdf77 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -1848,7 +1848,7 @@ unsigned dn_mss_from_pmtu(struct net_device *dev, int mtu)
{
unsigned mss = 230 - DN_MAX_NSP_DATA_HEADER;
if (dev) {
- struct dn_dev *dn_db = dev->dn_ptr;
+ struct dn_dev *dn_db = rcu_dereference_raw(dev->dn_ptr);
mtu -= LL_RESERVED_SPACE(dev);
if (dn_db->use_long)
mtu -= 21;