D57897.diff
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	diff --git a/sys/sys/cpu.h b/sys/sys/cpu.h
	--- a/sys/sys/cpu.h
	+++ b/sys/sys/cpu.h
	@@ -51,6 +51,17 @@
	return ((struct pcpu *)v);
	}

	+/*
	+ * Assumes the parent bus sets the CPU_IVAR_PCPU instance variable, which most
	+ * CPU buses do. A panic will ensure if not the case. Calling devices should
	+ * check for that condition (most probably in their attach function).
	+ */
	+static __inline u_int
	+cpu_get_pcpuid(device_t dev)
	+{
	+ return (cpu_get_pcpu(dev)->pc_cpuid);
	+}
	+
	static __inline int32_t
	cpu_get_nominal_mhz(device_t dev)
	{