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authorTrond Myklebust <trond.myklebust@primarydata.com>2015-02-24 20:31:39 -0500
committerTrond Myklebust <trond.myklebust@primarydata.com>2016-01-31 21:37:22 -0500
commit30c5116b113689c87a711a0963753adadd702c04 (patch)
tree96065e4c74b1427029f2a72f1da56bc05b7fd065 /net/sunrpc/xprt.c
parent5edd1051f4f3bd7cddcc91e346fdd22eee639c72 (diff)
downloadlinux-30c5116b113689c87a711a0963753adadd702c04.tar.bz2
SUNRPC: Uninline xprt_get(); It isn't performance critical.
Also allow callers to pass NULL arguments to xprt_get() and xprt_put(). Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'net/sunrpc/xprt.c')
-rw-r--r--net/sunrpc/xprt.c24
1 files changed, 21 insertions, 3 deletions
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 37edea6fa92d..d8fd84c0cbba 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1307,7 +1307,7 @@ void xprt_release(struct rpc_task *task)
static void xprt_init(struct rpc_xprt *xprt, struct net *net)
{
- atomic_set(&xprt->count, 1);
+ kref_init(&xprt->kref);
spin_lock_init(&xprt->transport_lock);
spin_lock_init(&xprt->reserve_lock);
@@ -1415,6 +1415,24 @@ static void xprt_destroy(struct rpc_xprt *xprt)
xprt->ops->destroy(xprt);
}
+static void xprt_destroy_kref(struct kref *kref)
+{
+ xprt_destroy(container_of(kref, struct rpc_xprt, kref));
+}
+
+/**
+ * xprt_get - return a reference to an RPC transport.
+ * @xprt: pointer to the transport
+ *
+ */
+struct rpc_xprt *xprt_get(struct rpc_xprt *xprt)
+{
+ if (xprt != NULL && kref_get_unless_zero(&xprt->kref))
+ return xprt;
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(xprt_get);
+
/**
* xprt_put - release a reference to an RPC transport.
* @xprt: pointer to the transport
@@ -1422,7 +1440,7 @@ static void xprt_destroy(struct rpc_xprt *xprt)
*/
void xprt_put(struct rpc_xprt *xprt)
{
- if (atomic_dec_and_test(&xprt->count))
- xprt_destroy(xprt);
+ if (xprt != NULL)
+ kref_put(&xprt->kref, xprt_destroy_kref);
}
EXPORT_SYMBOL_GPL(xprt_put);