REFERENCED_LOCK
lock_request->l_state |= REFERENCED_LOCK;
lock_request->l_state &= ~REFERENCED_LOCK;
lock_request->l_state |= REFERENCED_LOCK;
lock_request->l_state &= ~REFERENCED_LOCK;
lock_request->l_state &= ~REFERENCED_LOCK;
lock_request->l_state &= ~REFERENCED_LOCK;
#define IS_REFERENCED(lock) ((lock)->l_state & REFERENCED_LOCK)