inet: frags: use kmem_cache for inet_frag_queue

Use kmem_cache to allocate/free inet_frag_queue objects since they're
all the same size per inet_frags user and are alloced/freed in high volumes
thus making it a perfect case for kmem_cache.

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index beb6872..c6557d9 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -60,6 +60,8 @@
 #include <net/inet_frag.h>
 #include <net/inet_ecn.h>
 
+static const char ip6_frag_cache_name[] = "ip6-frags";
+
 struct ip6frag_skb_cb
 {
 	struct inet6_skb_parm	h;
@@ -748,7 +750,10 @@
 	ip6_frags.qsize = sizeof(struct frag_queue);
 	ip6_frags.match = ip6_frag_match;
 	ip6_frags.frag_expire = ip6_frag_expire;
-	inet_frags_init(&ip6_frags);
+	ip6_frags.frags_cache_name = ip6_frag_cache_name;
+	ret = inet_frags_init(&ip6_frags);
+	if (ret)
+		goto err_pernet;
 out:
 	return ret;