Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

[pandora-kernel.git] / arch / i386 / kernel / apic.c

diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c
index 8c844d0..2fd4b7d 100644 (file)
--- a/arch/i386/kernel/apic.c
+++ b/arch/i386/kernel/apic.c
@@ -52,7 +52,18 @@ static cpumask_t timer_bcast_ipi;
 /*
  * Knob to control our willingness to enable the local APIC.
  */
-int enable_local_apic __initdata = 0; /* -1=force-disable, +1=force-enable */
+static int enable_local_apic __initdata = 0; /* -1=force-disable, +1=force-enable */
+
+static inline void lapic_disable(void)
+{
+       enable_local_apic = -1;
+       clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
+}
+
+static inline void lapic_enable(void)
+{
+       enable_local_apic = 1;
+}
 
 /*
  * Debug level
@@ -586,8 +597,7 @@ void __devinit setup_local_APIC(void)
                        printk("No ESR for 82489DX.\n");
        }
 
-       if (nmi_watchdog == NMI_LOCAL_APIC)
-               setup_apic_nmi_watchdog();
+       setup_apic_nmi_watchdog(NULL);
        apic_pm_activate();
 }
 
@@ -1183,11 +1193,11 @@ EXPORT_SYMBOL(switch_ipi_to_APIC_timer);
  * value into /proc/profile.
  */
 
-inline void smp_local_timer_interrupt(struct pt_regs * regs)
+inline void smp_local_timer_interrupt(void)
 {
-       profile_tick(CPU_PROFILING, regs);
+       profile_tick(CPU_PROFILING);
 #ifdef CONFIG_SMP
-       update_process_times(user_mode_vm(regs));
+       update_process_times(user_mode_vm(get_irq_regs()));
 #endif
 
        /*
@@ -1213,6 +1223,7 @@ inline void smp_local_timer_interrupt(struct pt_regs * regs)
 
 fastcall void smp_apic_timer_interrupt(struct pt_regs *regs)
 {
+       struct pt_regs *old_regs = set_irq_regs(regs);
        int cpu = smp_processor_id();
 
        /*
@@ -1231,12 +1242,13 @@ fastcall void smp_apic_timer_interrupt(struct pt_regs *regs)
         * interrupt lock, which is the WrongThing (tm) to do.
         */
        irq_enter();
-       smp_local_timer_interrupt(regs);
+       smp_local_timer_interrupt();
        irq_exit();
+       set_irq_regs(old_regs);
 }
 
 #ifndef CONFIG_SMP
-static void up_apic_timer_interrupt_call(struct pt_regs *regs)
+static void up_apic_timer_interrupt_call(void)
 {
        int cpu = smp_processor_id();
 
@@ -1245,11 +1257,11 @@ static void up_apic_timer_interrupt_call(struct pt_regs *regs)
         */
        per_cpu(irq_stat, cpu).apic_timer_irqs++;
 
-       smp_local_timer_interrupt(regs);
+       smp_local_timer_interrupt();
 }
 #endif
 
-void smp_send_timer_broadcast_ipi(struct pt_regs *regs)
+void smp_send_timer_broadcast_ipi(void)
 {
        cpumask_t mask;
 
@@ -1262,7 +1274,7 @@ void smp_send_timer_broadcast_ipi(struct pt_regs *regs)
                 * We can directly call the apic timer interrupt handler
                 * in UP case. Minus all irq related functions
                 */
-               up_apic_timer_interrupt_call(regs);
+               up_apic_timer_interrupt_call();
 #endif
        }
 }
@@ -1373,3 +1385,18 @@ int __init APIC_init_uniprocessor (void)
 
        return 0;
 }
+
+static int __init parse_lapic(char *arg)
+{
+       lapic_enable();
+       return 0;
+}
+early_param("lapic", parse_lapic);
+
+static int __init parse_nolapic(char *arg)
+{
+       lapic_disable();
+       return 0;
+}
+early_param("nolapic", parse_nolapic);
+