SUNRPC: Convert struct rpc_xprt to use atomic_t counters

[linux-2.6-block.git] / net / sunrpc / xprt.c

diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 8bdcdbe07b98f9de382ab182a5f2d2746825cfc9..4499b5a51763dc6982ded94aab150136d7f896ca 100644 (file)
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -964,7 +964,7 @@ struct rpc_xprt *xprt_alloc(struct net *net, int size, int max_req)
        xprt = kzalloc(size, GFP_KERNEL);
        if (xprt == NULL)
                goto out;
-       kref_init(&xprt->kref);
+       atomic_set(&xprt->count, 1);
 
        xprt->max_reqs = max_req;
        xprt->slot = kcalloc(max_req, sizeof(struct rpc_rqst), GFP_KERNEL);
@@ -1144,13 +1144,11 @@ found:
 
 /**
  * xprt_destroy - destroy an RPC transport, killing off all requests.
- * @kref: kref for the transport to destroy
+ * @xprt: transport to destroy
  *
  */
-static void xprt_destroy(struct kref *kref)
+static void xprt_destroy(struct rpc_xprt *xprt)
 {
-       struct rpc_xprt *xprt = container_of(kref, struct rpc_xprt, kref);
-
        dprintk("RPC:       destroying transport %p\n", xprt);
        xprt->shutdown = 1;
        del_timer_sync(&xprt->timer);
@@ -1174,7 +1172,8 @@ static void xprt_destroy(struct kref *kref)
  */
 void xprt_put(struct rpc_xprt *xprt)
 {
-       kref_put(&xprt->kref, xprt_destroy);
+       if (atomic_dec_and_test(&xprt->count))
+               xprt_destroy(xprt);
 }
 
 /**
@@ -1184,6 +1183,7 @@ void xprt_put(struct rpc_xprt *xprt)
  */
 struct rpc_xprt *xprt_get(struct rpc_xprt *xprt)
 {
-       kref_get(&xprt->kref);
-       return xprt;
+       if (atomic_inc_not_zero(&xprt->count))
+               return xprt;
+       return NULL;
 }