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net: Statically initialize init_net.dev_base_head

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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 <[email protected]>
Acked-by: Eric Dumazet <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Rustad, Mark D authored and David S. Miller committed 2012-07-18 13:32:27 -07:00
1 parent 2ab1c24bbd
commit 734b65417b
2 files changed
+5 -2
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net/core/dev.c
+2 -1
View File
@@ -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)
net/core/net_namespace.c
+3 -1
View File
@@ -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 */