[ATM]: Suppress some sparse warnings

  CHECK   net/atm/br2684.c
net/atm/br2684.c:665:13: warning: context imbalance in 'br2684_seq_start' - wrong count at exit
net/atm/br2684.c:676:13: warning: context imbalance in 'br2684_seq_stop' - unexpected unlock
  CHECK   net/atm/lec.c
net/atm/lec.c:196:23: warning: expensive signed divide
  CHECK   net/atm/proc.c
net/atm/proc.c:151:14: warning: context imbalance in 'vcc_seq_start' - wrong count at exit
net/atm/proc.c:154:13: warning: context imbalance in 'vcc_seq_stop' - unexpected unlock

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/atm/proc.c b/net/atm/proc.c
index 565e75e..4912511 100644
--- a/net/atm/proc.c
+++ b/net/atm/proc.c
@@ -142,6 +142,7 @@
 }
 
 static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(vcc_sklist_lock)
 {
 	struct vcc_state *state = seq->private;
 	loff_t left = *pos;
@@ -152,6 +153,7 @@
 }
 
 static void vcc_seq_stop(struct seq_file *seq, void *v)
+	__releases(vcc_sklist_lock)
 {
 	read_unlock(&vcc_sklist_lock);
 }