+#define CAA_BUILD_BUG_ON(cond) ((void)CAA_BUILD_BUG_ON_ZERO(cond))
+
+/*
+ * __rcu is an annotation that documents RCU pointer accesses that need
+ * to be protected by a read-side critical section. Eventually, a static
+ * checker will be able to use this annotation to detect incorrect RCU
+ * usage.
+ */
+#define __rcu
+
+#ifdef __cplusplus
+#define URCU_FORCE_CAST(type, arg) (reinterpret_cast<type>(arg))
+#else
+#define URCU_FORCE_CAST(type, arg) ((type) (arg))
+#endif
+
+#define caa_is_signed_type(type) ((type) -1 < (type) 0)
+
+/*
+ * Sign-extend to long if needed, and output type is unsigned long.
+ */
+#define caa_cast_long_keep_sign(v) \
+ (caa_is_signed_type(__typeof__(v)) ? \
+ (unsigned long) (long) (v) : \
+ (unsigned long) (v))