[patch 24/26] genirq: Provide handle_percpu_simple_irq()

[Thomas Gleixner]

Special case for vmbus to replace their homegrown flow handler.

Not sure whether we need it at all. I can't see a reason why that
needs special handling at all if CONFIG_HYPERV=n

Not-Yet-Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 include/linux/irq.h |    1 +
 kernel/irq/chip.c   |   15 +++++++++++++++
 2 files changed, 16 insertions(+)

Index: tip/include/linux/irq.h
===================================================================
--- tip.orig/include/linux/irq.h
+++ tip/include/linux/irq.h
@@ -423,6 +423,7 @@ extern void handle_edge_irq(unsigned int
 extern void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_simple_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_percpu_irq(unsigned int irq, struct irq_desc *desc);
+extern void handle_percpu_simple_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_bad_irq(unsigned int irq, struct irq_desc *desc);
 extern void handle_nested_irq(unsigned int irq);
Index: tip/kernel/irq/chip.c
===================================================================
--- tip.orig/kernel/irq/chip.c
+++ tip/kernel/irq/chip.c
@@ -623,6 +623,21 @@ handle_percpu_irq(unsigned int irq, stru
 }
 
 /**
+ *	handle_percpu_simple_irq - Per CPU local irq handler
+ *	@irq:	the interrupt number
+ *	@desc:	the interrupt description structure for this irq
+ *
+ *	Per CPU interrupts on SMP machines without locking
+ *	requirements. No ack/eoi handling.
+ */
+void
+handle_percpu_simple_irq(unsigned int irq, struct irq_desc *desc)
+{
+	kstat_incr_irqs_this_cpu(irq, desc);
+	handle_irq_event_percpu(desc, desc->action);
+}
+
+/**
  * handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
  * @irq:	the interrupt number
  * @desc:	the interrupt description structure for this irq


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