net: some optimizations in af_inet

1) Use eq_net() in inet_netns_ok() to speedup socket creation if
   !CONFIG_NET_NS

2) Reorder the tests about inet_ehash_secret generation (once only)
   Use the unlikely() macro when testing if inet_ehash_secret already
   generated.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index b1462e8..fe03048 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -245,7 +245,7 @@ static inline int inet_netns_ok(struct net *net, int protocol)
        int hash;
        struct net_protocol *ipprot;
 
-       if (net == &init_net)
+       if (net_eq(net, &init_net))
                return 1;
 
        hash = protocol & (MAX_INET_PROTOS - 1);
@@ -272,10 +272,9 @@ static int inet_create(struct net *net, struct socket *sock, int protocol)
        int try_loading_module = 0;
        int err;
 
-       if (sock->type != SOCK_RAW &&
-           sock->type != SOCK_DGRAM &&
-           !inet_ehash_secret)
-               build_ehash_secret();
+       if (unlikely(!inet_ehash_secret))
+               if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
+                       build_ehash_secret();
 
        sock->state = SS_UNCONNECTED;