code: public static void munlock(Pointer addr, long len) {
  
          if(Delegate.munlock(addr, new NativeLong(len)) != 0) {
              if(logger.isDebugEnabled())
                  logger.debug("munlocking failed with errno:" + errno.strerror());
          } else {
              if(logger.isDebugEnabled())
                  logger.debug("munlocking region");
          }
      }
docs: Unlock the given region.  Does not report failures.