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[NET]: Cleanup pernet operation without CONFIG_NET_NS 

If CONFIG_NET_NS is not set, the only namespace is possible.

This patch removes list of pernet_operations and cleanups code a bit.
This list is not needed if there are no namespaces. We should just call
->init method.

Additionally, the ->exit will be called on module unloading only. This
case is safe - the code is not discarded. For the in/kernel code, ->exit
should never be called.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Denis V. Lunev 2007-11-13 03:23:21 -08:00 committed by David S. Miller
parent 072ee3f9bd
commit ed160e839d
1 changed files with 18 additions and 0 deletions
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18
net/core/net_namespace.c
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@ -188,6 +188,7 @@ static int __init net_ns_init(void)
pure_initcall(net_ns_init);
#ifdef CONFIG_NET_NS
static int register_pernet_operations(struct list_head *list,
struct pernet_operations *ops)
{
@ -228,6 +229,23 @@ static void unregister_pernet_operations(struct pernet_operations *ops)
ops->exit(net);
}
#else
static int register_pernet_operations(struct list_head *list,
struct pernet_operations *ops)
{
if (ops->init == NULL)
return 0;
return ops->init(&init_net);
}
static void unregister_pernet_operations(struct pernet_operations *ops)
{
if (ops->exit)
ops->exit(&init_net);
}
#endif
/**
* register_pernet_subsys - register a network namespace subsystem
* @ops: pernet operations structure for the subsystem