1 files changed, 10 insertions, 71 deletions

diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 60be58617eb9..80e9b498c443 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -42,6 +42,8 @@
 
 int sis_apic_bug; /* not actually supported, dummy for compile */
 
+static int no_timer_check;
+
 static DEFINE_SPINLOCK(ioapic_lock);
 
 /*
@@ -1601,7 +1603,7 @@ 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 +1673,13 @@ 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.
@@ -1804,76 +1813,6 @@ device_initcall(ioapic_init_sysfs);
 
 #define IO_APIC_MAX_ID          0xFE
 
-int __init io_apic_get_unique_id (int ioapic, int apic_id)
-{
-        union IO_APIC_reg_00 reg_00;
-        static physid_mask_t apic_id_map;
-        unsigned long flags;
-        int i = 0;
-
-        /*
-         * The P4 platform supports up to 256 APIC IDs on two separate APIC 
-         * buses (one for LAPICs, one for IOAPICs), where predecessors only 
-         * supports up to 16 on one shared APIC bus.
-         * 
-         * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full
-         *      advantage of new APIC bus architecture.
-         */
-
-        if (physids_empty(apic_id_map))
-                apic_id_map = phys_cpu_present_map;
-
-        spin_lock_irqsave(&ioapic_lock, flags);
-        reg_00.raw = io_apic_read(ioapic, 0);
-        spin_unlock_irqrestore(&ioapic_lock, flags);
-
-        if (apic_id >= IO_APIC_MAX_ID) {
-                apic_printk(APIC_QUIET, KERN_WARNING "IOAPIC[%d]: Invalid apic_id %d, trying "
-                        "%d\n", ioapic, apic_id, reg_00.bits.ID);
-                apic_id = reg_00.bits.ID;
-        }
-
-        /*
-         * Every APIC in a system must have a unique ID or we get lots of nice 
-         * 'stuck on smp_invalidate_needed IPI wait' messages.
-         */
-        if (physid_isset(apic_id, apic_id_map)) {
-
-                for (i = 0; i < IO_APIC_MAX_ID; i++) {
-                        if (!physid_isset(i, apic_id_map))
-                                break;
-                }
-
-                if (i == IO_APIC_MAX_ID)
-                        panic("Max apic_id exceeded!\n");
-
-                apic_printk(APIC_VERBOSE, KERN_WARNING "IOAPIC[%d]: apic_id %d already used, "
-                        "trying %d\n", ioapic, apic_id, i);
-
-                apic_id = i;
-        } 
-
-        physid_set(apic_id, apic_id_map);
-
-        if (reg_00.bits.ID != apic_id) {
-                reg_00.bits.ID = apic_id;
-
-                spin_lock_irqsave(&ioapic_lock, flags);
-                io_apic_write(ioapic, 0, reg_00.raw);
-                reg_00.raw = io_apic_read(ioapic, 0);
-                spin_unlock_irqrestore(&ioapic_lock, flags);
-
-                /* Sanity check */
-                if (reg_00.bits.ID != apic_id)
-                        panic("IOAPIC[%d]: Unable change apic_id!\n", ioapic);
-        }
-
-        apic_printk(APIC_VERBOSE,KERN_INFO "IOAPIC[%d]: Assigned apic_id %d\n", ioapic, apic_id);
-
-        return apic_id;
-}
-
-
 int __init io_apic_get_version (int ioapic)
 {
         union IO_APIC_reg_01    reg_01;