• john stultz's avatar
    [PATCH] clocksource init adjustments (fix bug #7426) · 6bb74df4
    john stultz authored
    This patch resolves the issue found here:
    http://bugme.osdl.org/show_bug.cgi?id=7426
    
    The basic summary is:
    Currently we register most of i386/x86_64 clocksources at module_init
    time. Then we enable clocksource selection at late_initcall time. This
    causes some problems for drivers that use gettimeofday for init
    calibration routines (specifically the es1968 driver in this case),
    where durring module_init, the only clocksource available is the low-res
    jiffies clocksource. This may cause slight calibration errors, due to
    the small sampling time used.
    
    It should be noted that drivers that require fine grained time may not
    function on architectures that do not have better then jiffies
    resolution timekeeping (there are a few). However, this does not
    discount the reasonable need for such fine-grained timekeeping at init
    time.
    
    Thus the solution here is to register clocksources earlier (ideally when
    the hardware is being initialized), and then we enable clockso...
    6bb74df4
cyclone.c 3.03 KB