x86, apic: Fix missed handling of discrete apics

In case of discrete (pretty old) apics we may have cpu_has_apic bit
not set but have to check if smp_found_config (MP spec) is there
and apic was not disabled.

Also don't forget to print apic/io-apic for such case as well.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20090915071230.GA10604@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 3 insertions, 3 deletions

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 072aea6c630b..2d59dfa29785 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -978,7 +978,7 @@ void lapic_shutdown(void)
 {
         unsigned long flags;
 
-        if (!cpu_has_apic)
+        if (!cpu_has_apic && !apic_from_smp_config())
                 return;
 
         local_irq_save(flags);
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 3c8f9e75d038..593c4f8a8bb8 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1863,7 +1863,7 @@ __apicdebuginit(int) print_all_ICs(void)
         print_PIC();
 
         /* don't print out if apic is not there */
-        if (!cpu_has_apic || disable_apic)
+        if (!cpu_has_apic && !apic_from_smp_config())
                 return 0;
 
         print_all_local_APICs();
@@ -1981,7 +1981,7 @@ void disable_IO_APIC(void)
         /*
          * Use virtual wire A mode when interrupt remapping is enabled.
          */
-        if (cpu_has_apic)
+        if (cpu_has_apic || apic_from_smp_config())
                 disconnect_bsp_APIC(!intr_remapping_enabled &&
                                 ioapic_i8259.pin != -1);
 }