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authorVeaceslav Falico <vfalico@redhat.com>2013-09-25 09:20:08 +0200
committerDavid S. Miller <davem@davemloft.net>2013-09-26 16:02:04 -0400
commit5249dec7380cb64928d2ae6201028b4da1dceb1e (patch)
tree2503cd128a3302d5871d6fa0ed804e508188a54f /net/core/dev.c
parent2f268f129c2d1a05d297fe3ee34d393f862d2b22 (diff)
downloadlinux-linaro-stable-5249dec7380cb64928d2ae6201028b4da1dceb1e.tar.gz
net: add RCU variant to search for netdev_adjacent link
Currently we have only the RTNL flavour, however we can traverse it while holding only RCU, so add the RCU search. Add an RCU variant that uses list_head * as an argument, so that it can be universally used afterwards. CC: "David S. Miller" <davem@davemloft.net> CC: Eric Dumazet <edumazet@google.com> CC: Jiri Pirko <jiri@resnulli.us> CC: Alexander Duyck <alexander.h.duyck@intel.com> CC: Cong Wang <amwang@redhat.com> Signed-off-by: Veaceslav Falico <vfalico@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 9a395e03da74..9290f09cdf26 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4380,6 +4380,19 @@ struct netdev_adjacent {
struct rcu_head rcu;
};
+static struct netdev_adjacent *__netdev_find_adj_rcu(struct net_device *dev,
+ struct net_device *adj_dev,
+ struct list_head *adj_list)
+{
+ struct netdev_adjacent *adj;
+
+ list_for_each_entry_rcu(adj, adj_list, list) {
+ if (adj->dev == adj_dev)
+ return adj;
+ }
+ return NULL;
+}
+
static struct netdev_adjacent *__netdev_find_adj(struct net_device *dev,
struct net_device *adj_dev,
struct list_head *adj_list)