• Andrew Morton's avatar
    [PATCH] Fix sys_time() to get subtick correction from the new xtime · 5362a354
    Andrew Morton authored
    From: "La Monte H.P. Yarroll" <piggy@timesys.com>
    
    This is a Scott Wood patch against 2.6.3.
    
    
    Use gettimeofday() rather than xtime.tv_sec in sys_time(), since
    sys_stime() uses settimeofday() and thus subtracts the subtick correction
    from the new xtime.
    
    stime() used settimeofday(), but time() did not use gettimeofday().  Since
    settimeofday() subtracts out the current intra-tick correction, and nsec
    was 0 (since stime() only allows seconds), this resulted in xtime being
    slightly earlier than the time that was set.
    
    If time() had used gettimeofday(), the correction would have been applied,
    and everything would be fine.  However, instead time just reads the current
    xtime.tv_sec, so if time() is called immediately after stime(), you'll
    usually get a value one second earlier.
    5362a354
sys_ia32.c 65.2 KB