+
+int safe_smp_processor_id(void)
+{
+ int apicid, i;
+
+ if (disable_apic)
+ return 0;
+
+ apicid = hard_smp_processor_id();
+ if (x86_cpu_to_apicid[apicid] == apicid)
+ return apicid;
+
+ for (i = 0; i < NR_CPUS; ++i) {
+ if (x86_cpu_to_apicid[i] == apicid)
+ return i;
+ }
+
+ /* No entries in x86_cpu_to_apicid? Either no MPS|ACPI,
+ * or called too early. Either way, we must be CPU 0. */
+ if (x86_cpu_to_apicid[0] == BAD_APICID)
+ return 0;
+
+ return 0; /* Should not happen */
+}