[NETFILTER]: Supress some sparse warnings

  CHECK   net/netfilter/nf_conntrack_expect.c
net/netfilter/nf_conntrack_expect.c:429:13: warning: context imbalance in 'exp_seq_start' - wrong count at exit
net/netfilter/nf_conntrack_expect.c:441:13: warning: context imbalance in 'exp_seq_stop' - unexpected unlock
  CHECK   net/netfilter/nf_log.c
net/netfilter/nf_log.c:105:13: warning: context imbalance in 'seq_start' - wrong count at exit
net/netfilter/nf_log.c:125:13: warning: context imbalance in 'seq_stop' - unexpected unlock
  CHECK   net/netfilter/nfnetlink_queue.c
net/netfilter/nfnetlink_queue.c:363:7: warning: symbol 'size' shadows an earlier one
net/netfilter/nfnetlink_queue.c:217:9: originally declared here
net/netfilter/nfnetlink_queue.c:847:13: warning: context imbalance in 'seq_start' - wrong count at exit
net/netfilter/nfnetlink_queue.c:859:13: warning: context imbalance in 'seq_stop' - unexpected unlock

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 51476f8..a48b20f 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -360,7 +360,7 @@
 
 	if (data_len) {
 		struct nlattr *nla;
-		int size = nla_attr_size(data_len);
+		int sz = nla_attr_size(data_len);
 
 		if (skb_tailroom(skb) < nla_total_size(data_len)) {
 			printk(KERN_WARNING "nf_queue: no tailroom!\n");
@@ -369,7 +369,7 @@
 
 		nla = (struct nlattr *)skb_put(skb, nla_total_size(data_len));
 		nla->nla_type = NFQA_PAYLOAD;
-		nla->nla_len = size;
+		nla->nla_len = sz;
 
 		if (skb_copy_bits(entskb, 0, nla_data(nla), data_len))
 			BUG();
@@ -845,6 +845,7 @@
 }
 
 static void *seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(instances_lock)
 {
 	spin_lock(&instances_lock);
 	return get_idx(seq, *pos);
@@ -857,6 +858,7 @@
 }
 
 static void seq_stop(struct seq_file *s, void *v)
+	__releases(instances_lock)
 {
 	spin_unlock(&instances_lock);
 }