x86: fix APIC warning on 32bit v2

for http://bugzilla.kernel.org/show_bug.cgi?id=10613

BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor)

v2: fix 64 bit compilation

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Gabriel C <nix.or.die@googlemail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 14 insertions, 2 deletions

diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index c49ebcc6c41e..33c5216fd3e1 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -242,12 +242,19 @@ static int __init acpi_parse_madt(struct acpi_table_header *table)
 
 static void __cpuinit acpi_register_lapic(int id, u8 enabled)
 {
+        unsigned int ver = 0;
+
         if (!enabled) {
                 ++disabled_cpus;
                 return;
         }
 
-        generic_processor_info(id, 0);
+#ifdef CONFIG_X86_32
+        if (boot_cpu_physical_apicid != -1U)
+                ver = apic_version[boot_cpu_physical_apicid];
+#endif
+
+        generic_processor_info(id, ver);
 }
 
 static int __init
@@ -767,8 +774,13 @@ static void __init acpi_register_lapic_address(unsigned long address)
         mp_lapic_addr = address;
 
         set_fixmap_nocache(FIX_APIC_BASE, address);
-        if (boot_cpu_physical_apicid == -1U)
+        if (boot_cpu_physical_apicid == -1U) {
                 boot_cpu_physical_apicid  = GET_APIC_ID(read_apic_id());
+#ifdef CONFIG_X86_32
+                apic_version[boot_cpu_physical_apicid] =
+                         GET_APIC_VERSION(apic_read(APIC_LVR));
+#endif
+        }
 }
 
 static int __init early_acpi_parse_madt_lapic_addr_ovr(void)