#define _rw_lock __u.__i[0]
#define _rw_waiters __u.__i[1]
#define _b_lock __u.__i[0]
#define _b_waiters __u.__i[1]
#define _b_limit __u.__i[2]
#define _b_count __u.__i[3]
#define _rw_lock __u.__i[0]
#define _rw_waiters __u.__i[1]
#define _b_lock __u.__i[0]
#define _b_waiters __u.__i[1]
#define _b_limit __u.__i[2]
#define _b_count __u.__i[3]