compat: Fix compile warning.

In ../compat/nf_conntrack_reasm.c nf_frags_cache_name is declared
if OVS_NF_DEFRAG6_BACKPORT is defined.  However, later in the patch
it is only used if HAVE_INET_FRAGS_WITH_FRAGS_WORK is defined and
HAVE_INET_FRAGS_RND is not defined.  This will cause a compile warning
about unused variables.

Fix it up by using the same defines that enable its use to decide
if it should be declared and avoid the compiler warning.

Fixes: 4a90b277baca ("compat: Fixup ipv6 fragmentation on 4.9.135+ kernels")
Signed-off-by: Greg Rose <gvrose8192@gmail.com>
Acked-by: Yi-Hung Wei <yihung.wei@gmail.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

diff --git a/datapath/linux/compat/nf_conntrack_reasm.c b/datapath/linux/compat/nf_conntrack_reasm.c
index ced9fba98b9af23025778e487b6cc2c0e796e843..77b4b25485ffeace2ebcd51da2eb27838976b9fc 100644 (file)
--- a/datapath/linux/compat/nf_conntrack_reasm.c
+++ b/datapath/linux/compat/nf_conntrack_reasm.c
@@ -57,10 +57,13 @@
 #include <net/netns/generic.h>
 #include "datapath.h"
 
-#ifdef OVS_NF_DEFRAG6_BACKPORT
+#if defined(HAVE_INET_FRAGS_WITH_FRAGS_WORK) || !defined(HAVE_INET_FRAGS_RND)
 
 static const char nf_frags_cache_name[] = "ovs-frag6";
 
+#endif
+
+#ifdef OVS_NF_DEFRAG6_BACKPORT
 struct nf_ct_frag6_skb_cb
 {
        struct inet6_skb_parm   h;