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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
Download Patch File Download Diff File Expand all files Collapse all files

6
net/ipv4/inet_hashtables.c
View File

@@ -278,7 +278,7 @@ unique:
sk->sk_hash = hash;
BUG_TRAP(sk_unhashed(sk));
__sk_add_node(sk, &head->chain);
sock_prot_inc_use(sk->sk_prot);
sock_prot_inuse_add(sk->sk_prot, 1);
write_unlock(lock);
if (twp) {
@@ -321,7 +321,7 @@ void __inet_hash_nolisten(struct inet_hashinfo *hashinfo, struct sock *sk)
write_lock(lock);
__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_GPL(__inet_hash_nolisten);
@@ -342,7 +342,7 @@ void __inet_hash(struct inet_hashinfo *hashinfo, struct sock *sk)
inet_listen_wlock(hashinfo);
__sk_add_node(sk, list);
sock_prot_inc_use(sk->sk_prot);
sock_prot_inuse_add(sk->sk_prot, 1);
write_unlock(lock);
wake_up(&hashinfo->lhash_wait);
}