sunrpc: Make xprt auth cache release work with the xprt

This is done in order to facilitate getting the ip_map_cache from
which to put the ip_map.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index 95fc3e8..385d822 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -128,9 +128,8 @@
 	struct svc_xprt *xprt =
 		container_of(kref, struct svc_xprt, xpt_ref);
 	struct module *owner = xprt->xpt_class->xcl_owner;
-	if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags) &&
-	    xprt->xpt_auth_cache != NULL)
-		svcauth_unix_info_release(xprt->xpt_auth_cache);
+	if (test_bit(XPT_CACHE_AUTH, &xprt->xpt_flags))
+		svcauth_unix_info_release(xprt);
 	xprt->xpt_ops->xpo_free(xprt);
 	module_put(owner);
 }
diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c
index 31b99c5..49e39ff 100644
--- a/net/sunrpc/svcauth_unix.c
+++ b/net/sunrpc/svcauth_unix.c
@@ -472,10 +472,13 @@
 }
 
 void
-svcauth_unix_info_release(void *info)
+svcauth_unix_info_release(struct svc_xprt *xpt)
 {
-	struct ip_map *ipm = info;
-	cache_put(&ipm->h, &ip_map_cache);
+	struct ip_map *ipm;
+
+	ipm = xpt->xpt_auth_cache;
+	if (ipm != NULL)
+		cache_put(&ipm->h, &ip_map_cache);
 }
 
 /****************************************************************************