-#ifndef _LTTNG_WRAPPER_LIST_H
-#define _LTTNG_WRAPPER_LIST_H
-
-/*
+/* SPDX-License-Identifier: GPL-2.0
+ *
* wrapper/list.h
*
* wrapper around linux/list.h.
*
* Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; only version 2 of the License.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
* This wrapper code is derived from Linux 3.19.2 include/linux/list.h
* and include/linux/rculist.h, hence the GPLv2 license applied to this
* file.
*/
+#ifndef _LTTNG_WRAPPER_LIST_H
+#define _LTTNG_WRAPPER_LIST_H
+
#include <linux/list.h>
#include <linux/rculist.h>
+/*
+ * return the first or the next element in an RCU protected hlist
+ */
+#define lttng_hlist_first_rcu(head) (*((struct hlist_node __rcu **)(&(head)->first)))
+#define lttng_hlist_next_rcu(node) (*((struct hlist_node __rcu **)(&(node)->next)))
+#define lttng_hlist_pprev_rcu(node) (*((struct hlist_node __rcu **)((node)->pprev)))
+
#define lttng_hlist_entry_safe(ptr, type, member) \
({ typeof(ptr) ____ptr = (ptr); \
____ptr ? hlist_entry(____ptr, type, member) : NULL; \