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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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2
net/ipv4/inet_timewait_sock.c
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@@ -91,7 +91,7 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
/* Step 2: Remove SK from established hash. */
if (__sk_del_node_init(sk))
sock_prot_dec_use(sk->sk_prot);
sock_prot_inuse_add(sk->sk_prot, -1);
/* Step 3: Hash TW into TIMEWAIT chain. */
inet_twsk_add_node(tw, &ehead->twchain);