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| author | Rustad, Mark D <mark.d.rustad@intel.com> | 2012-07-18 09:06:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-18 13:32:27 -0700 |
| commit | 734b65417b24d6eea3e3d7457e1f11493890ee1d (patch) | |
| tree | 608e36d53d11479bc95fda54cf83931102fc8935 | |
| parent | 2ab1c24bbd1bae22e0a54beba0cbb12272d940e4 (diff) | |
| download | blackbird-op-linux-734b65417b24d6eea3e3d7457e1f11493890ee1d.tar.gz blackbird-op-linux-734b65417b24d6eea3e3d7457e1f11493890ee1d.zip | |
net: Statically initialize init_net.dev_base_head
This change eliminates an initialization-order hazard most
recently seen when netprio_cgroup is built into the kernel.
With thanks to Eric Dumazet for catching a bug.
Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/core/dev.c | 3 | ||||
| -rw-r--r-- | net/core/net_namespace.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 0f28a9e0b8ad..1cb0d8a6aa6c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6283,7 +6283,8 @@ static struct hlist_head *netdev_create_hash(void) /* Initialize per network namespace state */ static int __net_init netdev_init(struct net *net) { - INIT_LIST_HEAD(&net->dev_base_head); + if (net != &init_net) + INIT_LIST_HEAD(&net->dev_base_head); net->dev_name_head = netdev_create_hash(); if (net->dev_name_head == NULL) diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index dddbacb8f28c..42f1e1c7514f 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -27,7 +27,9 @@ static DEFINE_MUTEX(net_mutex); LIST_HEAD(net_namespace_list); EXPORT_SYMBOL_GPL(net_namespace_list); -struct net init_net; +struct net init_net = { + .dev_base_head = LIST_HEAD_INIT(init_net.dev_base_head), +}; EXPORT_SYMBOL(init_net); #define INITIAL_NET_GEN_PTRS 13 /* +1 for len +2 for rcu_head */ |
