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genirq: Provide compat handling for bus_lock/bus_sync_unlock

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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>
This commit is contained in:
Thomas Gleixner 2010-09-27 12:44:35 +00:00
parent a77c463591
commit 3876ec9ef3
3 changed files with 35 additions and 19 deletions
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20
kernel/irq/chip.c
View File

@ -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);

12
kernel/irq/internals.h
View File

@ -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);
}
/*

22
kernel/irq/manage.c
View File

@ -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 @@ static void irq_finalize_oneshot(unsigned int irq, struct irq_desc *desc)
*/
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 @@ static void irq_finalize_oneshot(unsigned int irq, struct irq_desc *desc)
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);