tunnels: add __rcu annotations

Add __rcu annotations to :
        (struct ip_tunnel)->prl
        (struct ip_tunnel_prl_entry)->next
        (struct xfrm_tunnel)->next
	struct xfrm_tunnel *tunnel4_handlers
	struct xfrm_tunnel *tunnel64_handlers

And use appropriate rcu primitives to reduce sparse warnings if
CONFIG_SPARSE_RCU_POINTER=y

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/net/ipip.h b/include/net/ipip.h
index 0403fe4c4519..a32654d52730 100644
--- a/include/net/ipip.h
+++ b/include/net/ipip.h
@@ -34,12 +34,12 @@ struct ip_tunnel {
 #ifdef CONFIG_IPV6_SIT_6RD
         struct ip_tunnel_6rd_parm       ip6rd;
 #endif
-        struct ip_tunnel_prl_entry      *prl;           /* potential router list */
+        struct ip_tunnel_prl_entry __rcu *prl;          /* potential router list */
         unsigned int                    prl_count;      /* # of entries in PRL */
 };
 
 struct ip_tunnel_prl_entry {
-        struct ip_tunnel_prl_entry      *next;
+        struct ip_tunnel_prl_entry __rcu *next;
         __be32                          addr;
         u16                             flags;
         struct rcu_head                 rcu_head;