RPC: Remove unnecessary module refcounting

 The sunrpc module itself is referenced by other sources, so only the
 auth_gss credcaches need to increment their module refcount.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/auth.c

@@ -67,8 +67,6 @@ rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
 
 	if (flavor >= RPC_AUTH_MAXFLAVOR || !(ops = auth_flavors[flavor]))
 		return NULL;
-	if (!try_module_get(ops->owner))
-		return NULL;
 	auth = ops->create(clnt, pseudoflavor);
 	if (!auth)
 		return NULL;
@@ -85,7 +83,6 @@ rpcauth_destroy(struct rpc_auth *auth)
 	if (!atomic_dec_and_test(&auth->au_count))
 		return;
 	auth->au_ops->destroy(auth);
-	module_put(auth->au_ops->owner);
 	kfree(auth);
 }
 

net/sunrpc/auth_gss/auth_gss.c

@@ -569,6 +569,8 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
 
 	dprintk("RPC:      creating GSS authenticator for client %p\n",clnt);
 
+	if (!try_module_get(THIS_MODULE))
+		return NULL;
 	if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
 		goto out_dec;
 	gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
@@ -601,6 +603,7 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
 err_free:
 	kfree(gss_auth);
 out_dec:
+	module_put(THIS_MODULE);
 	return NULL;
 }
 
@@ -617,6 +620,7 @@ gss_destroy(struct rpc_auth *auth)
 	gss_mech_put(gss_auth->mech);
 
 	rpcauth_free_credcache(auth);
+	module_put(THIS_MODULE);
 }
 
 /* gss_destroy_cred (and gss_destroy_ctx) are used to clean up after failure