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	if (error == 0 && req->newptr != NULL) {			if (error == 0 && req->newptr != NULL) {
	acpi_timer_frequency = freq;			acpi_timer_frequency = freq;
	acpi_timer_timecounter.tc_frequency = acpi_timer_frequency;			acpi_timer_timecounter.tc_frequency = acpi_timer_frequency;
	}			}

	return (error);			return (error);
	}			}

	SYSCTL_PROC(_machdep, OID_AUTO, acpi_timer_freq, CTLTYPE_INT \| CTLFLAG_RW,			SYSCTL_PROC(_machdep, OID_AUTO, acpi_timer_freq,
	0, sizeof(u_int), acpi_timer_sysctl_freq, "I", "ACPI timer frequency");			CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_NEEDGIANT,
				0, sizeof(u_int), acpi_timer_sysctl_freq, "I",
				"ACPI timer frequency");

	/*			/*
	* Some ACPI timers are known or believed to suffer from implementation			* Some ACPI timers are known or believed to suffer from implementation
	* problems which can lead to erroneous values being read. This function			* problems which can lead to erroneous values being read. This function
	* tests for consistent results from the timer and returns 1 if it believes			* tests for consistent results from the timer and returns 1 if it believes
	* the timer is consistent, otherwise it returns 0.			* the timer is consistent, otherwise it returns 0.
	*			*
	* It appears the cause is that the counter is not latched to the PCI bus			* It appears the cause is that the counter is not latched to the PCI bus
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