[PATCH 3.16 145/294] ipv6: Add rt6_get_cookie() function

3.16.50-rc1 review patch. If anyone has any objections, please let me know. -- From: Martin KaFai Lau commit b197df4f0f3782782e9ea8996e91b65ae33e8dd9 upstream. Instead of doing the rt6->rt6i_node check whenever we need to get the route's cookie. Refactor it

[PATCH 3.16 145/294] ipv6: Add rt6_get_cookie() function

3.16.50-rc1 review patch. If anyone has any objections, please let me know. -- From: Martin KaFai Lau commit b197df4f0f3782782e9ea8996e91b65ae33e8dd9 upstream. Instead of doing the rt6->rt6i_node check whenever we need to get the route's cookie. Refactor it into