net/ipv6: Rename rt6_get_cookie_safe

rt6_get_cookie_safe takes a fib6_info and checks the sernum of
the node. Update the name to reflect its purpose.

Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 062dd4d8..2d6fcfe 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2128,7 +2128,7 @@ static bool fib6_check(struct fib6_info *f6i, u32 cookie)
 {
 	u32 rt_cookie = 0;
 
-	if ((f6i && !rt6_get_cookie_safe(f6i, &rt_cookie)) ||
+	if ((f6i && !fib6_get_cookie_safe(f6i, &rt_cookie)) ||
 	     rt_cookie != cookie)
 		return false;
 
@@ -2142,7 +2142,7 @@ static struct dst_entry *rt6_check(struct rt6_info *rt, u32 cookie)
 {
 	u32 rt_cookie = 0;
 
-	if ((rt->from && !rt6_get_cookie_safe(rt->from, &rt_cookie)) ||
+	if ((rt->from && !fib6_get_cookie_safe(rt->from, &rt_cookie)) ||
 	    rt_cookie != cookie)
 		return NULL;