x86: APIC/SMP: Downgrade the NMI watchdog for "noapic"

 If configured to use the I/O APIC, the NMI watchdog is deemed to fail if
the chip has been deactivated as a result of "noapic".  Downgrade to the
local APIC watchdog similarly to what is done for the UP case.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/asm-x86/mach-default/smpboot_hooks.h b/include/asm-x86/mach-default/smpboot_hooks.h
index 56d0e1fa0258..b63c52182006 100644
--- a/include/asm-x86/mach-default/smpboot_hooks.h
+++ b/include/asm-x86/mach-default/smpboot_hooks.h
@@ -41,8 +41,10 @@ static inline void __init smpboot_setup_io_apic(void)
          */
         if (!skip_ioapic_setup && nr_ioapics)
                 setup_IO_APIC();
-        else
+        else {
                 nr_ioapics = 0;
+                localise_nmi_watchdog();
+        }
 }
 
 static inline void smpboot_clear_io_apic(void)