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-rw-r--r--include/linux/irq.h27
1 files changed, 16 insertions, 11 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 437f2c635db..b40771dd114 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -176,17 +176,6 @@ typedef struct irq_desc irq_desc_t;
*/
#include <asm/hw_irq.h>
-/*
- * Architectures call this to let the generic IRQ layer
- * handle an interrupt:
- */
-static inline void generic_handle_irq(unsigned int irq, struct pt_regs *regs)
-{
- struct irq_desc *desc = irq_desc + irq;
-
- desc->handle_irq(irq, desc, regs);
-}
-
extern int setup_irq(unsigned int irq, struct irqaction *new);
#ifdef CONFIG_GENERIC_HARDIRQS
@@ -324,6 +313,22 @@ handle_irq_name(void fastcall (*handle)(unsigned int, struct irq_desc *,
*/
extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
+/*
+ * Architectures call this to let the generic IRQ layer
+ * handle an interrupt. If the descriptor is attached to an
+ * irqchip-style controller then we call the ->handle_irq() handler,
+ * and it calls __do_IRQ() if it's attached to an irqtype-style controller.
+ */
+static inline void generic_handle_irq(unsigned int irq, struct pt_regs *regs)
+{
+ struct irq_desc *desc = irq_desc + irq;
+
+ if (likely(desc->handle_irq))
+ desc->handle_irq(irq, desc, regs);
+ else
+ __do_IRQ(irq, regs);
+}
+
/* Handling of unhandled and spurious interrupts: */
extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
int action_ret, struct pt_regs *regs);