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genirq: Add preflow handler support

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sparc64 needs to call a preflow handler on certain interrupts befor
calling the action chain. Integrate it into handle_fasteoi_irq. Must
be enabled via CONFIG_IRQ_FASTEOI_PREFLOW. No impact when disabled.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Gleixner 2011-02-10 15:14:20 +01:00
parent 3836ca08aa
commit 781295762d
4 changed files with 30 additions and 1 deletions
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3
include/linux/irq.h
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@ -29,9 +29,10 @@
#include <asm/irq_regs.h>
struct irq_desc;
struct irq_data;
typedef void (*irq_flow_handler_t)(unsigned int irq,
struct irq_desc *desc);
typedef void (*irq_preflow_handler_t)(struct irq_data *data);
/*
* IRQ line status.