Messages in this thread | | | Subject | Re: + i386-lapic-timer-calibration.patch added to -mm tree | From | Thomas Gleixner <> | Date | Wed, 08 Nov 2006 13:27:10 +0100 |
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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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