diff options
| author | Florian Westphal <fw@strlen.de> | 2015-12-03 10:49:42 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-12-15 15:14:04 +0100 |
| commit | 9c55d3b5459bffe8ac098175e672a90260c0cfa4 (patch) | |
| tree | 0abda573f209020c8877a48dd4517c917ea8be3f /net/netfilter/nfnetlink.c | |
| parent | c38c4597e4bf3e99860eac98211748e1ecb0e139 (diff) | |
| download | linux-9c55d3b5459bffe8ac098175e672a90260c0cfa4.tar.gz linux-9c55d3b5459bffe8ac098175e672a90260c0cfa4.tar.xz | |
nfnetlink: add nfnl_dereference_protected helper
to avoid overly long line in followup patch.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nfnetlink.c')
| -rw-r--r-- | net/netfilter/nfnetlink.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c index 28591fa94ba5..aebf5cd45602 100644 --- a/net/netfilter/nfnetlink.c +++ b/net/netfilter/nfnetlink.c @@ -33,6 +33,10 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_NETFILTER); +#define nfnl_dereference_protected(id) \ + rcu_dereference_protected(table[(id)].subsys, \ + lockdep_nfnl_is_held((id))) + static char __initdata nfversion[] = "0.30"; static struct { @@ -208,8 +212,7 @@ replay: } else { rcu_read_unlock(); nfnl_lock(subsys_id); - if (rcu_dereference_protected(table[subsys_id].subsys, - lockdep_is_held(&table[subsys_id].mutex)) != ss || + if (nfnl_dereference_protected(subsys_id) != ss || nfnetlink_find_client(type, ss) != nc) err = -EAGAIN; else if (nc->call) @@ -299,15 +302,13 @@ replay: skb->sk = oskb->sk; nfnl_lock(subsys_id); - ss = rcu_dereference_protected(table[subsys_id].subsys, - lockdep_is_held(&table[subsys_id].mutex)); + ss = nfnl_dereference_protected(subsys_id); if (!ss) { #ifdef CONFIG_MODULES nfnl_unlock(subsys_id); request_module("nfnetlink-subsys-%d", subsys_id); nfnl_lock(subsys_id); - ss = rcu_dereference_protected(table[subsys_id].subsys, - lockdep_is_held(&table[subsys_id].mutex)); + ss = nfnl_dereference_protected(subsys_id); if (!ss) #endif { |