#include <urcu.h>
#include <linux/compiler.h>
+#define ULONG_CMP_GE(a, b) (ULONG_MAX / 2 >= (a) - (b))
+
#define rcu_dereference_check(p, c) rcu_dereference(p)
#define rcu_dereference_raw(p) rcu_dereference(p)
#define rcu_dereference_protected(p, c) rcu_dereference(p)