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    Subject[PATCH -mm] fix jiffies clocksource inittime
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    Andrew,
    In debugging a problem w/ the -rt tree, I noticed that on systems that
    mark the tsc as unstable before it is registered, the TSC would still be
    selected and used for a short period of time. Digging in it looks to be
    a result of the mix of the clocksource list changes and my clocksource
    initialization changes.

    With the -rt tree, using a bad TSC, even for a short period of time can
    results in a hang at boot. I was not able to reproduce this hang w/
    mainline, but I'm not completely certain that someone won't trip on it.

    This patch resolves the issue by initializing the jiffies clocksource
    earlier so a bad TSC won't get selected just because nothing else is yet
    registered.

    thanks
    -john

    Signed-off-by: John Stultz <johnstul@us.ibm.com>

    diff --git a/kernel/time/jiffies.c b/kernel/time/jiffies.c
    index 3be8da8..4c256fd 100644
    --- a/kernel/time/jiffies.c
    +++ b/kernel/time/jiffies.c
    @@ -69,4 +69,4 @@ static int __init init_jiffies_clocksour
    return clocksource_register(&clocksource_jiffies);
    }

    -module_init(init_jiffies_clocksource);
    +core_initcall(init_jiffies_clocksource);

    -
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