[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>

3 files changed, 8 insertions, 2 deletions

diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index e0cd9d00aa6..e405079e5a4 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -427,6 +427,7 @@ static struct hlist_node *ct_expect_get_idx(struct seq_file *seq, loff_t pos)
 }
 
 static void *exp_seq_start(struct seq_file *seq, loff_t *pos)
+        __acquires(nf_conntrack_lock)
 {
         read_lock_bh(&nf_conntrack_lock);
         return ct_expect_get_idx(seq, *pos);
@@ -439,6 +440,7 @@ static void *exp_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 }
 
 static void exp_seq_stop(struct seq_file *seq, void *v)
+        __releases(nf_conntrack_lock)
 {
         read_unlock_bh(&nf_conntrack_lock);
 }
diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index 4f5f2885fca..cec9976aecb 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -103,6 +103,7 @@ EXPORT_SYMBOL(nf_log_packet);
 
 #ifdef CONFIG_PROC_FS
 static void *seq_start(struct seq_file *seq, loff_t *pos)
+        __acquires(RCU)
 {
         rcu_read_lock();
 
@@ -123,6 +124,7 @@ static void *seq_next(struct seq_file *s, void *v, loff_t *pos)
 }
 
 static void seq_stop(struct seq_file *s, void *v)
+        __releases(RCU)
 {
         rcu_read_unlock();
 }
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 51476f82bb5..a48b20fe9cd 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -360,7 +360,7 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue,
 
         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 @@ nfqnl_build_packet_message(struct nfqnl_instance *queue,
 
                 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 struct hlist_node *get_idx(struct seq_file *seq, loff_t pos)
 }
 
 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_next(struct seq_file *s, void *v, loff_t *pos)
 }
 
 static void seq_stop(struct seq_file *s, void *v)
+        __releases(instances_lock)
 {
         spin_unlock(&instances_lock);
 }