1 files changed, 11 insertions, 1 deletions

diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index ac7684324954..afd87e64d0a8 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -37,11 +37,14 @@
 #include <asm/desc.h>
 #include <asm/proto.h>
 #include <asm/mach_apic.h>
+#include <asm/acpi.h>
 
 #define __apicdebuginit  __init
 
 int sis_apic_bug; /* not actually supported, dummy for compile */
 
+static int no_timer_check;
+
 static DEFINE_SPINLOCK(ioapic_lock);
 
 /*
@@ -1601,7 +1604,7 @@ static inline void check_timer(void)
                  * Ok, does IRQ0 through the IOAPIC work?
                  */
                 unmask_IO_APIC_irq(0);
-                if (timer_irq_works()) {
+                if (!no_timer_check && timer_irq_works()) {
                         nmi_watchdog_default();
                         if (nmi_watchdog == NMI_IO_APIC) {
                                 disable_8259A_irq(0);
@@ -1671,6 +1674,13 @@ static inline void check_timer(void)
         panic("IO-APIC + timer doesn't work! Try using the 'noapic' kernel parameter\n");
 }
 
+static int __init notimercheck(char *s)
+{
+        no_timer_check = 1;
+        return 1;
+}
+__setup("no_timer_check", notimercheck);
+
 /*
  *
  * IRQ's that are handled by the PIC in the MPS IOAPIC case.