2 files changed, 11 insertions, 12 deletions

diff --git a/arch/i386/kernel/acpi/earlyquirk.c b/arch/i386/kernel/acpi/earlyquirk.c
index bf86f7662d8b..a7d22d9f3d7e 100644
--- a/arch/i386/kernel/acpi/earlyquirk.c
+++ b/arch/i386/kernel/acpi/earlyquirk.c
@@ -14,11 +14,8 @@
 
 #ifdef CONFIG_ACPI
 
-static int nvidia_hpet_detected __initdata;
-
 static int __init nvidia_hpet_check(struct acpi_table_header *header)
 {
-        nvidia_hpet_detected = 1;
         return 0;
 }
 #endif
@@ -29,9 +26,7 @@ static int __init check_bridge(int vendor, int device)
         /* According to Nvidia all timer overrides are bogus unless HPET
            is enabled. */
         if (!acpi_use_timer_override && vendor == PCI_VENDOR_ID_NVIDIA) {
-                nvidia_hpet_detected = 0;
-                acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check);
-                if (nvidia_hpet_detected == 0) {
+                if (acpi_table_parse(ACPI_SIG_HPET, nvidia_hpet_check)) {
                         acpi_skip_timer_override = 1;
                           printk(KERN_INFO "Nvidia board "
                        "detected. Ignoring ACPI "
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index 9b0dd2744c82..4ff55e675576 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -45,6 +45,7 @@
 #include <linux/notifier.h>
 #include <linux/cpu.h>
 #include <linux/percpu.h>
+#include <linux/nmi.h>
 
 #include <linux/delay.h>
 #include <linux/mc146818rtc.h>
@@ -1278,8 +1279,9 @@ void __cpu_die(unsigned int cpu)
 
 int __cpuinit __cpu_up(unsigned int cpu)
 {
+        unsigned long flags;
 #ifdef CONFIG_HOTPLUG_CPU
-        int ret=0;
+        int ret = 0;
 
         /*
          * We do warm boot only on cpus that had booted earlier
@@ -1297,23 +1299,25 @@ int __cpuinit __cpu_up(unsigned int cpu)
         /* In case one didn't come up */
         if (!cpu_isset(cpu, cpu_callin_map)) {
                 printk(KERN_DEBUG "skipping cpu%d, didn't come online\n", cpu);
-                local_irq_enable();
                 return -EIO;
         }
 
-        local_irq_enable();
-
         per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
         /* Unleash the CPU! */
         cpu_set(cpu, smp_commenced_mask);
 
         /*
-         * Check TSC synchronization with the AP:
+         * Check TSC synchronization with the AP (keep irqs disabled
+         * while doing so):
          */
+        local_irq_save(flags);
         check_tsc_sync_source(cpu);
+        local_irq_restore(flags);
 
-        while (!cpu_isset(cpu, cpu_online_map))
+        while (!cpu_isset(cpu, cpu_online_map)) {
                 cpu_relax();
+                touch_nmi_watchdog();
+        }
 
 #ifdef CONFIG_X86_GENERICARCH
         if (num_online_cpus() > 8 && genapic == &apic_default)