rds:Simplify the allocation of slab caches

Use the new KMEM_CACHE() macro instead of direct kmem_cache_create
to simplify the creation of SLAB caches.
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/rds/tcp.c

@@ -719,9 +719,7 @@ static int __init rds_tcp_init(void)
 {
 	int ret;
 
-	rds_tcp_conn_slab = kmem_cache_create("rds_tcp_connection",
-					      sizeof(struct rds_tcp_connection),
-					      0, 0, NULL);
+	rds_tcp_conn_slab = KMEM_CACHE(rds_tcp_connection, 0);
 	if (!rds_tcp_conn_slab) {
 		ret = -ENOMEM;
 		goto out;

net/rds/tcp_recv.c

@@ -337,9 +337,7 @@ void rds_tcp_data_ready(struct sock *sk)
 
 int rds_tcp_recv_init(void)
 {
-	rds_tcp_incoming_slab = kmem_cache_create("rds_tcp_incoming",
-					sizeof(struct rds_tcp_incoming),
-					0, 0, NULL);
+	rds_tcp_incoming_slab = KMEM_CACHE(rds_tcp_incoming, 0);
 	if (!rds_tcp_incoming_slab)
 		return -ENOMEM;
 	return 0;