ipv6: Break up ip6_rt_copy()
This patch breaks up ip6_rt_copy() into ip6_rt_copy_init() and ip6_rt_cache_alloc(). In the later patch, we need to create a percpu rt6_info copy. Hence, refactor the common rt6_info init codes to ip6_rt_copy_init(). Signed-off-by: Martin KaFai Lau <kafai@fb.com> Cc: Hannes Frederic Sowa <hannes@stressinduktion.org> Cc: Steffen Klassert <steffen.klassert@secunet.com> Cc: Julian Anastasov <ja@ssi.bg> Signed-off-by: David S. Miller <davem@davemloft.net>
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