SUNRPC: Convert the credcache lookup code to use RCU

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 29d50ffa69d6..f7ff6ad3259e 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -93,11 +93,23 @@ unx_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
 }
 
 static void
-unx_destroy_cred(struct rpc_cred *rcred)
+unx_free_cred(struct unx_cred *unx_cred)
 {
-        struct unx_cred *cred = container_of(rcred, struct unx_cred, uc_base);
+        dprintk("RPC:       unx_free_cred %p\n", unx_cred);
+        kfree(unx_cred);
+}
+
+static void
+unx_free_cred_callback(struct rcu_head *head)
+{
+        struct unx_cred *unx_cred = container_of(head, struct unx_cred, uc_base.cr_rcu);
+        unx_free_cred(unx_cred);
+}
 
-        kfree(cred);
+static void
+unx_destroy_cred(struct rpc_cred *cred)
+{
+        call_rcu(&cred->cr_rcu, unx_free_cred_callback);
 }
 
 /*