X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=lib%2Fringbuffer%2Ffrontend_api.h;h=21e53ea2b49e6a4812557e4c0b11c5018ee2914d;hb=80bb26003945e96a8ade9c8788dab9b2e08cbc08;hp=23118c46d98d8cbfa424131e4ca9454ab2e89254;hpb=cc62f29ec5d5149ae6dba1a9acb538e06da07a94;p=lttng-modules.git

diff --git a/lib/ringbuffer/frontend_api.h b/lib/ringbuffer/frontend_api.h
index 23118c46..21e53ea2 100644
--- a/lib/ringbuffer/frontend_api.h
+++ b/lib/ringbuffer/frontend_api.h
@@ -1,34 +1,18 @@
-#ifndef _LIB_RING_BUFFER_FRONTEND_API_H
-#define _LIB_RING_BUFFER_FRONTEND_API_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+ *
  * lib/ringbuffer/frontend_api.h
  *
  * Ring Buffer Library Synchronization Header (buffer write API).
  *
  * Copyright (C) 2005-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Author:
- *	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
  * See ring_buffer_frontend.c for more information on wait-free algorithms.
  * See linux/ringbuffer/frontend.h for channel allocation and read-side API.
  */
 
+#ifndef _LIB_RING_BUFFER_FRONTEND_API_H
+#define _LIB_RING_BUFFER_FRONTEND_API_H
+
 #include <wrapper/ringbuffer/frontend.h>
 #include <wrapper/percpu-defs.h>
 #include <linux/errno.h>
@@ -58,7 +42,7 @@ int lib_ring_buffer_get_cpu(const struct lib_ring_buffer_config *config)
 	nesting = ++per_cpu(lib_ring_buffer_nesting, cpu);
 	barrier();
 
-	if (unlikely(nesting > 4)) {
+	if (unlikely(nesting > RING_BUFFER_MAX_NESTING)) {
 		WARN_ON_ONCE(1);
 		per_cpu(lib_ring_buffer_nesting, cpu)--;
 		rcu_read_unlock_sched_notrace();