[PKT_SCHED] net: add sparse annotation to ptype_seq_start/stop

Get rid of some more sparse warnings.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index eee7742..c9c593e 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2543,6 +2543,7 @@
 }
 
 static void *ptype_seq_start(struct seq_file *seq, loff_t *pos)
+	__acquires(RCU)
 {
 	rcu_read_lock();
 	return *pos ? ptype_get_idx(*pos - 1) : SEQ_START_TOKEN;
@@ -2578,6 +2579,7 @@
 }
 
 static void ptype_seq_stop(struct seq_file *seq, void *v)
+	__releases(RCU)
 {
 	rcu_read_unlock();
 }