genirq: Implement handle_irq_event()

Core code replacement for the ugly camel case. It contains all the
code which is shared in all handlers.

     clear status flags
     set INPROGRESS flag
     unlock
     call action chain
     note_interrupt
     lock
     clr INPROGRESS flag

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 42 insertions, 8 deletions

diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index cdd6fbbe771c..4ef059478ebf 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -51,14 +51,7 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action)
                "but no thread function available.", irq, action->name);
 }
 
-/**
- * handle_IRQ_event - irq action chain handler
- * @irq:        the interrupt number
- * @action:     the interrupt action chain for this irq
- *
- * Handles the action chain of an irq event
- */
-irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
+static irqreturn_t __handle_irq_event(unsigned int irq, struct irqaction *action)
 {
         irqreturn_t ret, retval = IRQ_NONE;
         unsigned int status = 0;
@@ -120,3 +113,41 @@ irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
 
         return retval;
 }
+
+irqreturn_t
+handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
+{
+        irqreturn_t ret = __handle_irq_event(desc->irq_data.irq, action);
+
+        if (!noirqdebug)
+                note_interrupt(desc->irq_data.irq, desc, ret);
+        return ret;
+}
+
+irqreturn_t handle_irq_event(struct irq_desc *desc)
+{
+        struct irqaction *action = desc->action;
+        irqreturn_t ret;
+
+        desc->status &= ~IRQ_PENDING;
+        desc->status |= IRQ_INPROGRESS;
+        raw_spin_unlock(&desc->lock);
+
+        ret = handle_irq_event_percpu(desc, action);
+
+        raw_spin_lock(&desc->lock);
+        desc->status &= ~IRQ_INPROGRESS;
+        return ret;
+}
+
+/**
+ * handle_IRQ_event - irq action chain handler
+ * @irq:        the interrupt number
+ * @action:     the interrupt action chain for this irq
+ *
+ * Handles the action chain of an irq event
+ */
+irqreturn_t handle_IRQ_event(unsigned int irq, struct irqaction *action)
+{
+        return __handle_irq_event(irq, action);
+}
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index c71fc4de0371..b61824cdadc6 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -45,6 +45,9 @@ extern void irq_disable(struct irq_desc *desc);
 
 extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
 
+irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
+irqreturn_t handle_irq_event(struct irq_desc *desc);
+
 /* Resending of interrupts :*/
 void check_irq_resend(struct irq_desc *desc, unsigned int irq);
 bool irq_wait_for_poll(struct irq_desc *desc);