genirq: Provide compat handling for bus_lock/bus_sync_unlock

Wrap the old chip functions for bus_lock/bus_sync_unlock until the
migration is complete and the old chip functions are removed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20100927121841.842536121@linutronix.de>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index e0e93ff..77e551d 100644 (file)
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -324,6 +324,17 @@ static void default_shutdown(unsigned int irq)
        desc->status |= IRQ_MASKED;
 }
 
+/* Temporary migration helpers */
+static void compat_bus_lock(struct irq_data *data)
+{
+       data->chip->bus_lock(data->irq);
+}
+
+static void compat_bus_sync_unlock(struct irq_data *data)
+{
+       data->chip->bus_sync_unlock(data->irq);
+}
+
 /*
  * Fixup enable/disable function pointers
  */
@@ -346,6 +357,11 @@ void irq_chip_set_defaults(struct irq_chip *chip)
                        chip->disable : default_shutdown;
        if (!chip->end)
                chip->end = dummy_irq_chip.end;
+
+       if (chip->bus_lock)
+               chip->irq_bus_lock = compat_bus_lock;
+       if (chip->bus_sync_unlock)
+               chip->irq_bus_sync_unlock = compat_bus_sync_unlock;
 }
 
 static inline void mask_ack_irq(struct irq_desc *desc, int irq)
@@ -687,7 +703,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
                desc->irq_data.chip = &dummy_irq_chip;
        }
 
-       chip_bus_lock(irq, desc);
+       chip_bus_lock(desc);
        raw_spin_lock_irqsave(&desc->lock, flags);
 
        /* Uninstall? */
@@ -707,7 +723,7 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
                desc->irq_data.chip->startup(irq);
        }
        raw_spin_unlock_irqrestore(&desc->lock, flags);
-       chip_bus_sync_unlock(irq, desc);
+       chip_bus_sync_unlock(desc);
 }
 EXPORT_SYMBOL_GPL(__set_irq_handler);
 

diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 562fc7e..ecafbfe 100644 (file)
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -43,16 +43,16 @@ extern int irq_select_affinity_usr(unsigned int irq);
 extern void irq_set_thread_affinity(struct irq_desc *desc);
 
 /* Inline functions for support of irq chips on slow busses */
-static inline void chip_bus_lock(unsigned int irq, struct irq_desc *desc)
+static inline void chip_bus_lock(struct irq_desc *desc)
 {
-       if (unlikely(desc->irq_data.chip->bus_lock))
-               desc->irq_data.chip->bus_lock(irq);
+       if (unlikely(desc->irq_data.chip->irq_bus_lock))
+               desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
 }
 
-static inline void chip_bus_sync_unlock(unsigned int irq, struct irq_desc *desc)
+static inline void chip_bus_sync_unlock(struct irq_desc *desc)
 {
-       if (unlikely(desc->irq_data.chip->bus_sync_unlock))
-               desc->irq_data.chip->bus_sync_unlock(irq);
+       if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
+               desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
 }
 
 /*

diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 4dfb195..dfb02ff 100644 (file)
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -246,11 +246,11 @@ void disable_irq_nosync(unsigned int irq)
        if (!desc)
                return;
 
-       chip_bus_lock(irq, desc);
+       chip_bus_lock(desc);
        raw_spin_lock_irqsave(&desc->lock, flags);
        __disable_irq(desc, irq, false);
        raw_spin_unlock_irqrestore(&desc->lock, flags);
-       chip_bus_sync_unlock(irq, desc);
+       chip_bus_sync_unlock(desc);
 }
 EXPORT_SYMBOL(disable_irq_nosync);
 
@@ -323,11 +323,11 @@ void enable_irq(unsigned int irq)
        if (!desc)
                return;
 
-       chip_bus_lock(irq, desc);
+       chip_bus_lock(desc);
        raw_spin_lock_irqsave(&desc->lock, flags);
        __enable_irq(desc, irq, false);
        raw_spin_unlock_irqrestore(&desc->lock, flags);
-       chip_bus_sync_unlock(irq, desc);
+       chip_bus_sync_unlock(desc);
 }
 EXPORT_SYMBOL(enable_irq);
 
@@ -507,7 +507,7 @@ static int irq_wait_for_interrupt(struct irqaction *action)
 static void irq_finalize_oneshot(unsigned int irq, struct irq_desc *desc)
 {
 again:
-       chip_bus_lock(irq, desc);
+       chip_bus_lock(desc);
        raw_spin_lock_irq(&desc->lock);
 
        /*
@@ -521,7 +521,7 @@ again:
         */
        if (unlikely(desc->status & IRQ_INPROGRESS)) {
                raw_spin_unlock_irq(&desc->lock);
-               chip_bus_sync_unlock(irq, desc);
+               chip_bus_sync_unlock(desc);
                cpu_relax();
                goto again;
        }
@@ -531,7 +531,7 @@ again:
                desc->irq_data.chip->unmask(irq);
        }
        raw_spin_unlock_irq(&desc->lock);
-       chip_bus_sync_unlock(irq, desc);
+       chip_bus_sync_unlock(desc);
 }
 
 #ifdef CONFIG_SMP
@@ -997,9 +997,9 @@ void free_irq(unsigned int irq, void *dev_id)
        if (!desc)
                return;
 
-       chip_bus_lock(irq, desc);
+       chip_bus_lock(desc);
        kfree(__free_irq(irq, dev_id));
-       chip_bus_sync_unlock(irq, desc);
+       chip_bus_sync_unlock(desc);
 }
 EXPORT_SYMBOL(free_irq);
 
@@ -1086,9 +1086,9 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler,
        action->name = devname;
        action->dev_id = dev_id;
 
-       chip_bus_lock(irq, desc);
+       chip_bus_lock(desc);
        retval = __setup_irq(irq, desc, action);
-       chip_bus_sync_unlock(irq, desc);
+       chip_bus_sync_unlock(desc);
 
        if (retval)
                kfree(action);