[PATCH ipsec-next] xfrm: fix unused variable warning if CONFIG_NETFILTER=n

[Florian Westphal]

After recent change 'x' is only used when CONFIG_NETFILTER is set:

net/ipv4/xfrm4_output.c: In function '__xfrm4_output':
net/ipv4/xfrm4_output.c:19:21: warning: unused variable 'x' [-Wunused-variable]
   19 |  struct xfrm_state *x = skb_dst(skb)->xfrm;

Expand the CONFIG_NETFILTER scope to avoid this.

Fixes: 2ab6096db2f1 ("xfrm: remove output_finish indirection from 
xfrm_state_afinfo")
Reported-by: Stephen Rothwell <s...@canb.auug.org.au>
Signed-off-by: Florian Westphal <f...@strlen.de>
---
 net/ipv4/xfrm4_output.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index 502eb189d852..3cff51ba72bb 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -16,9 +16,9 @@
 
 static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff 
*skb)
 {
+#ifdef CONFIG_NETFILTER
        struct xfrm_state *x = skb_dst(skb)->xfrm;
 
-#ifdef CONFIG_NETFILTER
        if (!x) {
                IPCB(skb)->flags |= IPSKB_REROUTED;
                return dst_output(net, sk, skb);
-- 
2.26.2