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-rw-r--r--arch/x86/kernel/smpboot.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index da10f07fc59..91055d7fc1b 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -994,7 +994,17 @@ int __cpuinit native_cpu_up(unsigned int cpu)
flush_tlb_all();
low_mappings = 1;
+#ifdef CONFIG_X86_PC
+ if (def_to_bigsmp && apicid > 8) {
+ printk(KERN_WARNING
+ "More than 8 CPUs detected - skipping them.\n"
+ "Use CONFIG_X86_GENERICARCH and CONFIG_X86_BIGSMP.\n");
+ err = -1;
+ } else
+ err = do_boot_cpu(apicid, cpu);
+#else
err = do_boot_cpu(apicid, cpu);
+#endif
zap_low_mappings();
low_mappings = 0;