[NET]: Add some acquires/releases sparse annotations.

Add __acquires() and __releases() annotations to suppress some sparse
warnings.

example of warnings :

net/ipv4/udp.c:1555:14: warning: context imbalance in 'udp_seq_start' - wrong
count at exit
net/ipv4/udp.c:1571:13: warning: context imbalance in 'udp_seq_stop' -
unexpected unlock

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index bd899d55773..802493327a8 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -2313,6 +2313,7 @@ static void *neigh_get_idx_any(struct seq_file *seq, loff_t *pos)
 }
 
 void *neigh_seq_start(struct seq_file *seq, loff_t *pos, struct neigh_table *tbl, unsigned int neigh_seq_flags)
+        __acquires(tbl->lock)
 {
         struct neigh_seq_state *state = seq->private;
         loff_t pos_minus_one;
@@ -2356,6 +2357,7 @@ out:
 EXPORT_SYMBOL(neigh_seq_next);
 
 void neigh_seq_stop(struct seq_file *seq, void *v)
+        __releases(tbl->lock)
 {
         struct neigh_seq_state *state = seq->private;
         struct neigh_table *tbl = state->tbl;