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-rw-r--r--arch/i386/kernel/mpparse.c26
1 files changed, 18 insertions, 8 deletions
diff --git a/arch/i386/kernel/mpparse.c b/arch/i386/kernel/mpparse.c
index 1ca5269b1e8..91a64016956 100644
--- a/arch/i386/kernel/mpparse.c
+++ b/arch/i386/kernel/mpparse.c
@@ -38,6 +38,12 @@
int smp_found_config;
unsigned int __initdata maxcpus = NR_CPUS;
+#ifdef CONFIG_HOTPLUG_CPU
+#define CPU_HOTPLUG_ENABLED (1)
+#else
+#define CPU_HOTPLUG_ENABLED (0)
+#endif
+
/*
* Various Linux-internal data structures created from the
* MP-table.
@@ -219,14 +225,18 @@ static void __devinit MP_processor_info (struct mpc_config_processor *m)
cpu_set(num_processors, cpu_possible_map);
num_processors++;
- if ((num_processors > 8) &&
- ((APIC_XAPIC(ver) &&
- (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)) ||
- (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)))
- def_to_bigsmp = 1;
- else
- def_to_bigsmp = 0;
-
+ if (CPU_HOTPLUG_ENABLED || (num_processors > 8)) {
+ switch (boot_cpu_data.x86_vendor) {
+ case X86_VENDOR_INTEL:
+ if (!APIC_XAPIC(ver)) {
+ def_to_bigsmp = 0;
+ break;
+ }
+ /* If P4 and above fall through */
+ case X86_VENDOR_AMD:
+ def_to_bigsmp = 1;
+ }
+ }
bios_cpu_apicid[num_processors - 1] = m->mpc_apicid;
}