-#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; \
pos && ({ n = pos->member.next; 1; }); \
pos = lttng_hlist_entry_safe(n, typeof(*pos), member))
-#ifndef rcu_dereference_raw_notrace
-#define rcu_dereference_raw_notrace(p) rcu_dereference_raw(p)
-#endif
-
-/**
- * lttng_hlist_for_each_entry_rcu_notrace - iterate over rcu list of given type (for tracing)
- * @pos: the type * to use as a loop cursor.
- * @head: the head for your list.
- * @member: the name of the hlist_node within the struct.
- *
- * This list-traversal primitive may safely run concurrently with
- * the _rcu list-mutation primitives such as hlist_add_head_rcu()
- * as long as the traversal is guarded by rcu_read_lock().
- *
- * This is the same as hlist_for_each_entry_rcu() except that it does
- * not do any RCU debugging or tracing.
- */
-#define lttng_hlist_for_each_entry_rcu_notrace(pos, head, member) \
- for (pos = lttng_hlist_entry_safe (rcu_dereference_raw_notrace(hlist_first_rcu(head)),\
- typeof(*(pos)), member); \
- pos; \
- pos = lttng_hlist_entry_safe(rcu_dereference_raw_notrace(hlist_next_rcu(\
- &(pos)->member)), typeof(*(pos)), member))
-
#endif /* _LTTNG_WRAPPER_LIST_H */