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    SubjectRe: + i386-lapic-timer-calibration.patch added to -mm tree
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    On Wed, 2006-11-08 at 13:09 +0100, Ingo Molnar wrote:
    > one question:
    >
    > > + long tapic = apic_read(APIC_TMCCT);
    > > + unsigned long pm = acpi_pm_read_early();
    >
    > is this function call safe if the box has no pm-timer?

    That's in the pm-timer-allow-early-access.patch:

    Subject: pmtimer: Allow early access to pm timer

    +static inline u32 acpi_pm_read_early(void)
    +{
    + if (!pmtmr_ioport)
    + return 0;
    + /* mask the output to 24 bits */
    + return acpi_pm_read_verified();
    +}

    If pmtmr is not available, the function returns 0, so the resulting
    delta is 0 and therefor ignored. Same applies, when PMTIMER is disabled
    in the config.

    tglx


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