Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

1 files changed, 10 insertions, 13 deletions

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index aa57c079c98f..3987e4408f75 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -61,12 +61,6 @@ unsigned int boot_cpu_physical_apicid = -1U;
 
 /*
  * The highest APIC ID seen during enumeration.
- *
- * On AMD, this determines the messaging protocol we can use: if all APIC IDs
- * are in the 0 ... 7 range, then we can use logical addressing which
- * has some performance advantages (better broadcasting).
- *
- * If there's an APIC ID above 8, we use physical addressing.
  */
 unsigned int max_physical_apicid;
 
@@ -1898,14 +1892,17 @@ void __cpuinit generic_processor_info(int apicid, int version)
                 max_physical_apicid = apicid;
 
 #ifdef CONFIG_X86_32
-        switch (boot_cpu_data.x86_vendor) {
-        case X86_VENDOR_INTEL:
-                if (num_processors > 8)
-                        def_to_bigsmp = 1;
-                break;
-        case X86_VENDOR_AMD:
-                if (max_physical_apicid >= 8)
+        if (num_processors > 8) {
+                switch (boot_cpu_data.x86_vendor) {
+                case X86_VENDOR_INTEL:
+                        if (!APIC_XAPIC(version)) {
+                                def_to_bigsmp = 0;
+                                break;
+                        }
+                        /* If P4 and above fall through */
+                case X86_VENDOR_AMD:
                         def_to_bigsmp = 1;
+                }
         }
 #endif