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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