and changed files

[powerpc.git] / kernel / irq / manage.c

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 8b961ad..203a518 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -38,6 +38,46 @@ void synchronize_irq(unsigned int irq)
 }
 EXPORT_SYMBOL(synchronize_irq);
 
+/**
+ *     irq_can_set_affinity - Check if the affinity of a given irq can be set
+ *     @irq:           Interrupt to check
+ *
+ */
+int irq_can_set_affinity(unsigned int irq)
+{
+       struct irq_desc *desc = irq_desc + irq;
+
+       if (CHECK_IRQ_PER_CPU(desc->status) || !desc->chip ||
+           !desc->chip->set_affinity)
+               return 0;
+
+       return 1;
+}
+
+/**
+ *     irq_set_affinity - Set the irq affinity of a given irq
+ *     @irq:           Interrupt to set affinity
+ *     @cpumask:       cpumask
+ *
+ */
+int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
+{
+       struct irq_desc *desc = irq_desc + irq;
+
+       if (!desc->chip->set_affinity)
+               return -EINVAL;
+
+       set_balance_irq_affinity(irq, cpumask);
+
+#ifdef CONFIG_GENERIC_PENDING_IRQ
+       set_pending_irq(irq, cpumask);
+#else
+       desc->affinity = cpumask;
+       desc->chip->set_affinity(irq, cpumask);
+#endif
+       return 0;
+}
+
 #endif
 
 /**
@@ -277,13 +317,19 @@ int setup_irq(unsigned int irq, struct irqaction *new)
        }
 
        *p = new;
-#if defined(CONFIG_IRQ_PER_CPU)
-       if (new->flags & IRQF_PERCPU)
-               desc->status |= IRQ_PER_CPU;
-#endif
+
+       /* Exclude IRQ from balancing */
+       if (new->flags & IRQF_NOBALANCING)
+               desc->status |= IRQ_NO_BALANCING;
+
        if (!shared) {
                irq_chip_set_defaults(desc->chip);
 
+#if defined(CONFIG_IRQ_PER_CPU)
+               if (new->flags & IRQF_PERCPU)
+                       desc->status |= IRQ_PER_CPU;
+#endif
+
                /* Setup the type (level, edge polarity) if configured: */
                if (new->flags & IRQF_TRIGGER_MASK) {
                        if (desc->chip && desc->chip->set_type)
@@ -328,12 +374,14 @@ int setup_irq(unsigned int irq, struct irqaction *new)
        return 0;
 
 mismatch:
+#ifdef CONFIG_DEBUG_SHIRQ
        if (!(new->flags & IRQF_PROBE_SHARED)) {
                printk(KERN_ERR "IRQ handler type mismatch for IRQ %d\n", irq);
                if (old_name)
                        printk(KERN_ERR "current handler: %s\n", old_name);
                dump_stack();
        }
+#endif
        spin_unlock_irqrestore(&desc->lock, flags);
        return -EBUSY;
 }
@@ -357,6 +405,7 @@ void free_irq(unsigned int irq, void *dev_id)
        struct irq_desc *desc;
        struct irqaction **p;
        unsigned long flags;
+       irqreturn_t (*handler)(int, void *) = NULL;
 
        WARN_ON(in_interrupt());
        if (irq >= NR_IRQS)
@@ -396,6 +445,8 @@ void free_irq(unsigned int irq, void *dev_id)
 
                        /* Make sure it's not being used on another CPU */
                        synchronize_irq(irq);
+                       if (action->flags & IRQF_SHARED)
+                               handler = action->handler;
                        kfree(action);
                        return;
                }
@@ -403,6 +454,17 @@ void free_irq(unsigned int irq, void *dev_id)
                spin_unlock_irqrestore(&desc->lock, flags);
                return;
        }
+#ifdef CONFIG_DEBUG_SHIRQ
+       if (handler) {
+               /*
+                * It's a shared IRQ -- the driver ought to be prepared for it
+                * to happen even now it's being freed, so let's make sure....
+                * We do this after actually deregistering it, to make sure that
+                * a 'real' IRQ doesn't run in parallel with our fake
+                */
+               handler(irq, dev_id);
+       }
+#endif
 }
 EXPORT_SYMBOL(free_irq);
 
@@ -445,7 +507,7 @@ int request_irq(unsigned int irq, irq_handler_t handler,
        /*
         * Lockdep wants atomic interrupt handlers:
         */
-       irqflags |= SA_INTERRUPT;
+       irqflags |= IRQF_DISABLED;
 #endif
        /*
         * Sanity-check: shared interrupts must pass in a real dev-ID,
@@ -475,6 +537,25 @@ int request_irq(unsigned int irq, irq_handler_t handler,
 
        select_smp_affinity(irq);
 
+#ifdef CONFIG_DEBUG_SHIRQ
+       if (irqflags & IRQF_SHARED) {
+               /*
+                * It's a shared IRQ -- the driver ought to be prepared for it
+                * to happen immediately, so let's make sure....
+                * We do this before actually registering it, to make sure that
+                * a 'real' IRQ doesn't run in parallel with our fake
+                */
+               if (irqflags & IRQF_DISABLED) {
+                       unsigned long flags;
+
+                       local_irq_save(flags);
+                       handler(irq, dev_id);
+                       local_irq_restore(flags);
+               } else
+                       handler(irq, dev_id);
+       }
+#endif
+
        retval = setup_irq(irq, action);
        if (retval)
                kfree(action);