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/linux-6.1.9/arch/x86/kernel/apic/ !
Dapic.c733 calibrate_by_pmtimer(long deltapm, long *delta, long *deltatsc) in calibrate_by_pmtimer() argument
744 apic_printk(APIC_VERBOSE, "... PM-Timer delta = %ld\n", deltapm); in calibrate_by_pmtimer()
747 if (!deltapm) in calibrate_by_pmtimer()
752 if (deltapm > (pm_100ms - pm_thresh) && in calibrate_by_pmtimer()
753 deltapm < (pm_100ms + pm_thresh)) { in calibrate_by_pmtimer()
758 res = (((u64)deltapm) * mult) >> 22; in calibrate_by_pmtimer()
765 do_div(res, deltapm); in calibrate_by_pmtimer()
773 do_div(res, deltapm); in calibrate_by_pmtimer()