svc: Change sk_inuse to a kref

Change the atomic_t reference count to a kref and move it to the
transport indepenent svc_xprt structure. Change the reference count
wrapper names to be generic.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Acked-by: Neil Brown <neilb@suse.de>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Greg Banks <gnb@sgi.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

1 files changed, 16 insertions, 0 deletions

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 6ff5ca71602f..31853bfcd88d 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -70,6 +70,21 @@ void svc_unreg_xprt_class(struct svc_xprt_class *xcl)
 }
 EXPORT_SYMBOL_GPL(svc_unreg_xprt_class);
 
+static void svc_xprt_free(struct kref *kref)
+{
+        struct svc_xprt *xprt =
+                container_of(kref, struct svc_xprt, xpt_ref);
+        struct module *owner = xprt->xpt_class->xcl_owner;
+        xprt->xpt_ops->xpo_free(xprt);
+        module_put(owner);
+}
+
+void svc_xprt_put(struct svc_xprt *xprt)
+{
+        kref_put(&xprt->xpt_ref, svc_xprt_free);
+}
+EXPORT_SYMBOL_GPL(svc_xprt_put);
+
 /*
  * Called by transport drivers to initialize the transport independent
  * portion of the transport instance.
@@ -79,6 +94,7 @@ void svc_xprt_init(struct svc_xprt_class *xcl, struct svc_xprt *xprt)
         memset(xprt, 0, sizeof(*xprt));
         xprt->xpt_class = xcl;
         xprt->xpt_ops = xcl->xcl_ops;
+        kref_init(&xprt->xpt_ref);
 }
 EXPORT_SYMBOL_GPL(svc_xprt_init);