ipvs: Simplify the allocation of ip_vs_conn slab caches

Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
to simplify the creation of SLAB caches.

Signed-off-by: Kunwu Chan <[e-mail]>
Acked-by: Simon Horman <[e-mail]>
Signed-off-by: Florian Westphal <[e-mail]>

net/netfilter/ipvs/ip_vs_conn.c

···
 		return -ENOMEM;
 
 	/* Allocate ip_vs_conn slab cache */
-	ip_vs_conn_cachep = kmem_cache_create("ip_vs_conn",
-					      sizeof(struct ip_vs_conn), 0,
-					      SLAB_HWCACHE_ALIGN, NULL);
+	ip_vs_conn_cachep = KMEM_CACHE(ip_vs_conn, SLAB_HWCACHE_ALIGN);
 	if (!ip_vs_conn_cachep) {
 		kvfree(ip_vs_conn_tab);
 		return -ENOMEM;