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| author | Rustad, Mark D <mark.d.rustad@intel.com> | 2012-07-18 09:06:07 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-02 10:30:35 -0700 |
| commit | e6da94be68b025bdbbee3764428769a85367aa79 (patch) | |
| tree | 6be1d9b7148e3e2d1a027d3b38232a61bab84239 | |
| parent | c031edca540afb66764db24eed10eb149ac6c852 (diff) | |
| download | linux-3.10-e6da94be68b025bdbbee3764428769a85367aa79.tar.gz linux-3.10-e6da94be68b025bdbbee3764428769a85367aa79.tar.bz2 linux-3.10-e6da94be68b025bdbbee3764428769a85367aa79.zip | |
net: Statically initialize init_net.dev_base_head
commit 734b65417b24d6eea3e3d7457e1f11493890ee1d upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 40d5ab15bef..3fd9cae3ccb 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6303,7 +6303,8 @@ 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 31a5ae51a45..dd00b71dd09 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -25,7 +25,9 @@ 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 */ |