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net: Make inet_twsk_put similar to sock_put 

By separating the freeing code from the refcounting decrementing.
Probably reducing icache pressure when we still have reference counts to
go.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-05-06 16:50:52 -07:00 committed by David S. Miller
parent 9ce77666da
commit 4dbc8ef7e1
1 changed files with 14 additions and 11 deletions
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25
net/ipv4/inet_timewait_sock.c
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@ -49,19 +49,22 @@ static void __inet_twsk_kill(struct inet_timewait_sock *tw,
inet_twsk_put(tw);
}
static noinline void inet_twsk_free(struct inet_timewait_sock *tw)
{
struct module *owner = tw->tw_prot->owner;
twsk_destructor((struct sock *)tw);
#ifdef SOCK_REFCNT_DEBUG
pr_debug("%s timewait_sock %p released\n", tw->tw_prot->name, tw);
#endif
release_net(twsk_net(tw));
kmem_cache_free(tw->tw_prot->twsk_prot->twsk_slab, tw);
module_put(owner);
}
void inet_twsk_put(struct inet_timewait_sock *tw)
{
if (atomic_dec_and_test(&tw->tw_refcnt)) {
struct module *owner = tw->tw_prot->owner;
twsk_destructor((struct sock *)tw);
#ifdef SOCK_REFCNT_DEBUG
printk(KERN_DEBUG "%s timewait_sock %p released\n",
tw->tw_prot->name, tw);
#endif
release_net(twsk_net(tw));
kmem_cache_free(tw->tw_prot->twsk_prot->twsk_slab, tw);
module_put(owner);
}
if (atomic_dec_and_test(&tw->tw_refcnt))
inet_twsk_free(tw);
}
EXPORT_SYMBOL_GPL(inet_twsk_put);