+#ifndef _LTTNG_TRACEPOINT_RCU_H
+#define _LTTNG_TRACEPOINT_RCU_H
+
+/*
+ * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ * This file allows weak linking on tracepoint RCU symbols for non-LGPL
+ * code.
+ */
+
+#include <urcu/compiler.h>
+
+#ifdef _LGPL_SOURCE
+
+#include <urcu-bp.h>
+
+#define TP_RCU_LINK_TEST() 1
+#define tp_rcu_read_lock_bp rcu_read_lock_bp
+#define tp_rcu_read_unlock_bp rcu_read_unlock_bp
+#define tp_rcu_dereference_bp rcu_dereference_bp
+
+#else /* _LGPL_SOURCE */
+
+#define TP_RCU_LINK_TEST() tp_rcu_read_lock_bp
+
+/* Symbols looked up with dlsym */
+static void (*tp_rcu_read_lock_bp)(void) __attribute__((unused));
+static void (*tp_rcu_read_unlock_bp)(void) __attribute__((unused));
+static void *(*tp_rcu_dereference_sym_bp)(void *p) __attribute__((unused));
+
+#define tp_rcu_dereference_bp(p) \
+ ({ \
+ typeof(p) _________p1 = URCU_FORCE_CAST(typeof(p), \
+ tp_rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \
+ (_________p1); \
+ })
+
+#endif /* _LGPL_SOURCE */
+
+#endif /* _LTTNG_TRACEPOINT_RCU_H */