lkml.org 
[lkml]   [2007]   [Feb]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[patch 1/9] Fix HPET init race
    Fix a race in the initialization of HPET, which might result in a 
    5 minute lockup on boot.

    Signed-off-by: Jiri Bohac <jbohac@suse.cz>

    Index: linux-2.6.20-rc5/arch/x86_64/kernel/apic.c
    ===================================================================
    --- linux-2.6.20-rc5.orig/arch/x86_64/kernel/apic.c
    +++ linux-2.6.20-rc5/arch/x86_64/kernel/apic.c
    @@ -764,10 +767,12 @@ static void setup_APIC_timer(unsigned in

    /* wait for irq slice */
    if (vxtime.hpet_address && hpet_use_timer) {
    - int trigger = hpet_readl(HPET_T0_CMP);
    - while (hpet_readl(HPET_COUNTER) >= trigger)
    - /* do nothing */ ;
    - while (hpet_readl(HPET_COUNTER) < trigger)
    + int trigger;
    + do
    + trigger = hpet_readl(HPET_T0_CMP);
    + while (hpet_readl(HPET_COUNTER) >= trigger);
    +
    + while (hpet_readl(HPET_COUNTER) < trigger)
    /* do nothing */ ;
    } else {
    int c1, c2;
    --
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-02-01 12:15    [W:0.034 / U:30.268 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site