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irq: Export functions to allow modular irq drivers

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Export handle_simple_irq, irq_modify_status, irq_alloc_descs,
irq_free_descs and generic_handle_irq to allow their usage in
modules. First user is IIO, which wants to be built modular, but needs
to be able to create irq chips, allocate and configure interrupt
descriptors and handle demultiplexing interrupts.

[ tglx: Moved the uninlinig of generic_handle_irq to a separate patch ]

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Link: http://lkml.kernel.org/r/%3C1305711544-505-1-git-send-email-jic23%40cam.ac.uk%3E
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jonathan Cameron 2011-05-18 10:39:04 +01:00 committed by Thomas Gleixner
parent fe12bc2c99
commit edf76f8307
2 changed files with 5 additions and 0 deletions
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2
kernel/irq/chip.c
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@ -310,6 +310,7 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
out_unlock:
raw_spin_unlock(&desc->lock);
}
EXPORT_SYMBOL_GPL(handle_simple_irq);
/**
* handle_level_irq - Level type irq handler
@ -613,6 +614,7 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
irq_put_desc_unlock(desc, flags);
}
EXPORT_SYMBOL_GPL(irq_modify_status);
/**
* irq_cpu_online - Invoke all irq_cpu_online functions.

3
kernel/irq/irqdesc.c
View file

@ -304,6 +304,7 @@ int generic_handle_irq(unsigned int irq)
generic_handle_irq_desc(irq, desc);
return 0;
}
EXPORT_SYMBOL_GPL(generic_handle_irq);
/* Dynamic interrupt handling */
@ -326,6 +327,7 @@ void irq_free_descs(unsigned int from, unsigned int cnt)
bitmap_clear(allocated_irqs, from, cnt);
mutex_unlock(&sparse_irq_lock);
}
EXPORT_SYMBOL_GPL(irq_free_descs);
/**
* irq_alloc_descs - allocate and initialize a range of irq descriptors
@ -366,6 +368,7 @@ irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node)
mutex_unlock(&sparse_irq_lock);
return ret;
}
EXPORT_SYMBOL_GPL(irq_alloc_descs);
/**
* irq_reserve_irqs - mark irqs allocated