[PATCH] x86_64: Clear APIC feature bit when local APIC is disabled

Needed for other checks later in ACPI.

Pointed out by Len Brown

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index 0856ad444f90..c50b06765a80 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -353,8 +353,10 @@ static __init void parse_cmdline_early (char ** cmdline_p)
                 if (fullarg(from, "enable_timer_pin_1"))
                         disable_timer_pin_1 = -1;
 
-                if (fullarg(from, "nolapic") || fullarg(from, "disableapic"))
+                if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) {
+                        clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
                         disable_apic = 1;
+                }
 
                 if (fullarg(from, "noapic"))
                         skip_ioapic_setup = 1;