irq, x86: fix lock status with numa_migrate_irq_desc

[safe/jmp/linux-2.6] / kernel / softirq.c

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 8d9934b..bdbe9de 100644 (file)
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -255,6 +255,7 @@ void irq_enter(void)
 {
        int cpu = smp_processor_id();
 
+       rcu_irq_enter();
        if (idle_cpu(cpu) && !in_interrupt()) {
                __irq_enter();
                tick_check_idle(cpu);
@@ -281,9 +282,9 @@ void irq_exit(void)
 
 #ifdef CONFIG_NO_HZ
        /* Make sure that timer wheel updates are propagated */
-       if (!in_interrupt() && idle_cpu(smp_processor_id()) && !need_resched())
-               tick_nohz_stop_sched_tick(0);
        rcu_irq_exit();
+       if (idle_cpu(smp_processor_id()) && !in_interrupt() && !need_resched())
+               tick_nohz_stop_sched_tick(0);
 #endif
        preempt_enable_no_resched();
 }
@@ -732,7 +733,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
                        break;
                /* Unbind so it can run.  Fall thru. */
                kthread_bind(per_cpu(ksoftirqd, hotcpu),
-                            any_online_cpu(cpu_online_map));
+                            cpumask_any(cpu_online_mask));
        case CPU_DEAD:
        case CPU_DEAD_FROZEN: {
                struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
@@ -783,3 +784,23 @@ int on_each_cpu(void (*func) (void *info), void *info, int wait)
 }
 EXPORT_SYMBOL(on_each_cpu);
 #endif
+
+/*
+ * [ These __weak aliases are kept in a separate compilation unit, so that
+ *   GCC does not inline them incorrectly. ]
+ */
+
+int __init __weak early_irq_init(void)
+{
+       return 0;
+}
+
+int __init __weak arch_early_irq_init(void)
+{
+       return 0;
+}
+
+int __weak arch_init_chip_data(struct irq_desc *desc, int cpu)
+{
+       return 0;
+}