1 files changed, 11 insertions, 0 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 4c51a2f8fd31..65d0b72777ea 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1360,6 +1360,17 @@ static void __init acpi_process_madt(void)
                         disable_acpi();
                 }
         }
+
+        /*
+         * ACPI supports both logical (e.g. Hyper-Threading) and physical
+         * processors, where MPS only supports physical.
+         */
+        if (acpi_lapic && acpi_ioapic)
+                printk(KERN_INFO "Using ACPI (MADT) for SMP configuration "
+                       "information\n");
+        else if (acpi_lapic)
+                printk(KERN_INFO "Using ACPI for processor (LAPIC) "
+                       "configuration information\n");
 #endif
         return;
 }