4809 NANOSEC should be 'long long' to avoid integer overflow bugs
4810 spa_async_tasks_pending suffers from an integer overflow bug
4811 in.mpathd: tv2ns suffers from an integer overflow bug
Reviewed by: Marcel Telka <marcel.telka@nexenta.com>

*** 232,242 ****
   *      Definitions for commonly used resolutions.
   */
  #define SEC             1
  #define MILLISEC        1000
  #define MICROSEC        1000000
! #define NANOSEC         1000000000
  
  #define MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
  #define NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
  
  #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
--- 232,242 ----
   *      Definitions for commonly used resolutions.
   */
  #define SEC             1
  #define MILLISEC        1000
  #define MICROSEC        1000000
! #define NANOSEC         1000000000LL
  
  #define MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
  #define NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
  
  #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */