SUNRPC: Convert struct rpc_xprt to use atomic_t counters
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 8bdcdbe..4499b5a 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -964,7 +964,7 @@
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 @@
/**
* 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 @@
*/
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 @@
*/
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;
}