ipv6: Change final dst lookup arg name to "can_sleep"

Since it indicates whether we are invoked from a sleepable
context or not.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 1fc5631..8f78aac 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -515,11 +515,11 @@
 extern struct dst_entry *	ip6_dst_lookup_flow(struct sock *sk,
 						    struct flowi *fl,
 						    const struct in6_addr *final_dst,
-						    bool want_blackhole);
+						    bool can_sleep);
 extern struct dst_entry *	ip6_sk_dst_lookup_flow(struct sock *sk,
 						       struct flowi *fl,
 						       const struct in6_addr *final_dst,
-						       bool want_blackhole);
+						       bool can_sleep);
 extern int			ip6_dst_blackhole(struct sock *sk,
 						  struct dst_entry **dst,
 						  struct flowi *fl);