-#ifndef _LIB_RING_BUFFER_FRONTEND_H
-#define _LIB_RING_BUFFER_FRONTEND_H
-
-/*
+/* SPDX-License-Identifier: (GPL-2.0 OR LGPL-2.1)
+ *
* lib/ringbuffer/frontend.h
*
* Ring Buffer Library Synchronization Header (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.
*/
+#ifndef _LIB_RING_BUFFER_FRONTEND_H
+#define _LIB_RING_BUFFER_FRONTEND_H
+
#include <linux/pipe_fs_i.h>
#include <linux/rcupdate.h>
#include <linux/cpumask.h>
#define for_each_channel_cpu(cpu, chan) \
for ((cpu) = -1; \
({ (cpu) = cpumask_next(cpu, (chan)->backend.cpumask); \
- smp_read_barrier_depends(); (cpu) < nr_cpu_ids; });)
+ smp_rmb(); (cpu) < nr_cpu_ids; });)
extern struct lib_ring_buffer *channel_get_ring_buffer(
const struct lib_ring_buffer_config *config,
int lib_ring_buffer_is_finalized(const struct lib_ring_buffer_config *config,
struct lib_ring_buffer *buf)
{
- int finalized = READ_ONCE(buf->finalized);
+ int finalized = LTTNG_READ_ONCE(buf->finalized);
/*
* Read finalized before counters.
*/