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netfilter: nfnetlink: silence warning if CONFIG_PROVE_RCU isn't set 

Since commit c14b78e7de ("netfilter:
nfnetlink: add mutex per subsystem") building nefnetlink.o without
CONFIG_PROVE_RCU set, triggers this GCC warning:
    net/netfilter/nfnetlink.c:65:22: warning: ‘nfnl_get_lock’ defined but not used [-Wunused-function]

The cause of that warning is, in short, that rcu_lockdep_assert()
compiles away if CONFIG_PROVE_RCU is not set. Silence this warning by
open coding nfnl_get_lock() in the sole place it was called, which
allows to remove that function.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Paul Bolle 2013-03-04 02:45:41 +00:00 committed by Pablo Neira Ayuso
parent ed018fa4df
commit 9df9e78323
1 changed files with 1 additions and 6 deletions
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7
net/netfilter/nfnetlink.c
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@ -62,11 +62,6 @@ void nfnl_unlock(__u8 subsys_id)
}
EXPORT_SYMBOL_GPL(nfnl_unlock);
static struct mutex *nfnl_get_lock(__u8 subsys_id)
{
return &table[subsys_id].mutex;
}
int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n)
{
nfnl_lock(n->subsys_id);
@ -199,7 +194,7 @@ static int nfnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
rcu_read_unlock();
nfnl_lock(subsys_id);
if (rcu_dereference_protected(table[subsys_id].subsys,
lockdep_is_held(nfnl_get_lock(subsys_id))) != ss ||
lockdep_is_held(&table[subsys_id].mutex)) != ss ||
nfnetlink_find_client(type, ss) != nc)
err = -EAGAIN;
else if (nc->call)