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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-10-29 07:09:24 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-11-09 00:50:08 +0300 |
| commit | fc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0 (patch) | |
| tree | d45160f52eea37d4e5149d511c3c577bef253801 /net/decnet/af_decnet.c | |
| parent | e4a7b93bd5d84e1e79917d024d17d745d190fc9a (diff) | |
| download | linux-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.c | 2 |
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; |