diff options
| author | Pavel Emelyanov <xemul@openvz.org> | 2007-11-01 00:43:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2007-11-01 00:43:49 -0700 |
| commit | d46557955f2a35e58772518775464cdf354b3245 (patch) | |
| tree | 1b61906c5ce3ccabdbeb4cec1815c4e0cc5faa0c /include | |
| parent | 1dba323b3f92cf4a475236763b0373cb7d49395d (diff) | |
| download | lwn-d46557955f2a35e58772518775464cdf354b3245.tar.gz lwn-d46557955f2a35e58772518775464cdf354b3245.zip | |
[NET]: Relax the reference counting of init_net_ns
When the CONFIG_NET_NS is n there's no need in refcounting
the initial net namespace. So relax this code by making a
stupid stubs for the "n" case.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/net_namespace.h | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/include/net/net_namespace.h b/include/net/net_namespace.h index 5279466606d2..1fd449a6530b 100644 --- a/include/net/net_namespace.h +++ b/include/net/net_namespace.h @@ -51,13 +51,12 @@ static inline struct net *copy_net_ns(unsigned long flags, struct net *net_ns) } #endif +#ifdef CONFIG_NET_NS extern void __put_net(struct net *net); static inline struct net *get_net(struct net *net) { -#ifdef CONFIG_NET atomic_inc(&net->count); -#endif return net; } @@ -75,26 +74,44 @@ static inline struct net *maybe_get_net(struct net *net) static inline void put_net(struct net *net) { -#ifdef CONFIG_NET if (atomic_dec_and_test(&net->count)) __put_net(net); -#endif } static inline struct net *hold_net(struct net *net) { -#ifdef CONFIG_NET atomic_inc(&net->use_count); -#endif return net; } static inline void release_net(struct net *net) { -#ifdef CONFIG_NET atomic_dec(&net->use_count); -#endif } +#else +static inline struct net *get_net(struct net *net) +{ + return net; +} + +static inline void put_net(struct net *net) +{ +} + +static inline struct net *hold_net(struct net *net) +{ + return net; +} + +static inline void release_net(struct net *net) +{ +} + +static inline struct net *maybe_get_net(struct net *net) +{ + return net; +} +#endif #define for_each_net(VAR) \ list_for_each_entry(VAR, &net_namespace_list, list) |