Fix kernel-doc warning for sk_filter_rcu_release():
Warning(net/core/filter.c:586): missing initial short description on line:
 * 	sk_filter_rcu_release: Release a socket filter by rcu_head
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc:	"David S. Miller" <davem@davemloft.net>
Cc:	netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
 EXPORT_SYMBOL(sk_chk_filter);
 
 /**
- *     sk_filter_rcu_release: Release a socket filter by rcu_head
+ *     sk_filter_rcu_release - Release a socket filter by rcu_head
  *     @rcu: rcu_head that contains the sk_filter to free
  */
 static void sk_filter_rcu_release(struct rcu_head *rcu)