Commit 
a43912ab19... ("tunnel: eliminate recursion field") eliminated
use of recursion field from tunnel structures, but its definition
still exists in ip6_tnl{}.
Let's remove that unused field.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 struct ip6_tnl {
        struct ip6_tnl *next;   /* next tunnel in list */
        struct net_device *dev; /* virtual device associated with tunnel */
-       int recursion;          /* depth of hard_start_xmit recursion */
        struct ip6_tnl_parm parms;      /* tunnel configuration parameters */
        struct flowi fl;        /* flowi template for xmit */
        struct dst_entry *dst_cache;    /* cached dst */