+#if defined(__SIZEOF_LONG__)
+#define CAA_BITS_PER_LONG (__SIZEOF_LONG__ * 8)
+#elif defined(_LP64)
+#define CAA_BITS_PER_LONG 64
+#else
+#define CAA_BITS_PER_LONG 32
+#endif
+
+/*
+ * caa_container_of - Get the address of an object containing a field.
+ *
+ * @ptr: pointer to the field.
+ * @type: type of the object.
+ * @member: name of the field within the object.
+ */
+#define caa_container_of(ptr, type, member) \
+ ({ \
+ const __typeof__(((type *) NULL)->member) * __ptr = (ptr); \
+ (type *)((char *)__ptr - offsetof(type, member)); \
+ })
+
+#define CAA_BUILD_BUG_ON_ZERO(cond) (sizeof(struct { int:-!!(cond); }))
+#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)) < 0)
+
+#define caa_cast_long_keep_sign(v) \
+ (caa_is_signed_type(__typeof__(v)) ? (long) (v) : (unsigned long) (v))
+