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[NET]: prot_inuse cleanups and optimizations

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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>
This commit is contained in:
Eric Dumazet 2008-01-03 20:46:48 -08:00 • committed by David S. Miller
parent 571e768202
commit 65f7651788
12 changed files with 57 additions and 36 deletions
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4
net/ipv4/raw.c
View file

@ -92,7 +92,7 @@ void raw_hash_sk(struct sock *sk, struct raw_hashinfo *h)
write_lock_bh(&h->lock);
sk_add_node(sk, head);
sock_prot_inc_use(sk->sk_prot);
sock_prot_inuse_add(sk->sk_prot, 1);
write_unlock_bh(&h->lock);
}
EXPORT_SYMBOL_GPL(raw_hash_sk);
@ -101,7 +101,7 @@ void raw_unhash_sk(struct sock *sk, struct raw_hashinfo *h)
{
write_lock_bh(&h->lock);
if (sk_del_node_init(sk))
sock_prot_dec_use(sk->sk_prot);
sock_prot_inuse_add(sk->sk_prot, -1);
write_unlock_bh(&h->lock);
}
EXPORT_SYMBOL_GPL(raw_unhash_sk);