[NET]: prot_inuse cleanups and optimizations

1) Cleanups (all functions are prefixed by sock_prot_inuse)

sock_prot_inc_use(prot) -> sock_prot_inuse_add(prot,-1)
sock_prot_dec_use(prot) -> sock_prot_inuse_add(prot,-1)
sock_prot_inuse()       -> sock_prot_inuse_get()

New functions :

sock_prot_inuse_init() and sock_prot_inuse_free() to abstract pcounter use.

2) if CONFIG_PROC_FS=n, we can zap 'inuse' member from "struct proto",
since nobody wants to read the inuse value.

This saves 1372 bytes on i386/SMP and some cpu cycles.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 0765d8bd380f..a66a7d8e2811 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -43,7 +43,7 @@ void __inet6_hash(struct inet_hashinfo *hashinfo,
         }
 
         __sk_add_node(sk, list);
-        sock_prot_inc_use(sk->sk_prot);
+        sock_prot_inuse_add(sk->sk_prot, 1);
         write_unlock(lock);
 }
 EXPORT_SYMBOL(__inet6_hash);
@@ -216,7 +216,7 @@ unique:
         BUG_TRAP(sk_unhashed(sk));
         __sk_add_node(sk, &head->chain);
         sk->sk_hash = hash;
-        sock_prot_inc_use(sk->sk_prot);
+        sock_prot_inuse_add(sk->sk_prot, 1);
         write_unlock(lock);
 
         if (twp != NULL) {