ipv6: Rename the dst_cache helper functions in ip6_tunnel
It is a prep work to fix the dst_entry refcnt bugs in ip6_tunnel. This patch rename: 1. ip6_tnl_dst_check() to ip6_tnl_dst_get() to better reflect that it will take a dst refcnt in the next patch. 2. ip6_tnl_dst_store() to ip6_tnl_dst_set() to have a more conventional name matching with ip6_tnl_dst_get(). Signed-off-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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