SUNRPC: Convert the credcache lookup code to use RCU

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

1 files changed, 16 insertions, 6 deletions

diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 55c47ae0a258..068fa6dfb64e 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -694,15 +694,25 @@ gss_destroy_ctx(struct gss_cl_ctx *ctx)
 }
 
 static void
-gss_destroy_cred(struct rpc_cred *rc)
+gss_free_cred(struct gss_cred *gss_cred)
 {
-        struct gss_cred *cred = container_of(rc, struct gss_cred, gc_base);
+        dprintk("RPC:       gss_free_cred %p\n", gss_cred);
+        if (gss_cred->gc_ctx)
+                gss_put_ctx(gss_cred->gc_ctx);
+        kfree(gss_cred);
+}
 
-        dprintk("RPC:       gss_destroy_cred \n");
+static void
+gss_free_cred_callback(struct rcu_head *head)
+{
+        struct gss_cred *gss_cred = container_of(head, struct gss_cred, gc_base.cr_rcu);
+        gss_free_cred(gss_cred);
+}
 
-        if (cred->gc_ctx)
-                gss_put_ctx(cred->gc_ctx);
-        kfree(cred);
+static void
+gss_destroy_cred(struct rpc_cred *cred)
+{
+        call_rcu(&cred->cr_rcu, gss_free_cred_callback);
 }
 
 /*