genirq: Remove the irq argument from note_interrupt()

Only required for the slow path. Retrieve it from irq descriptor if
necessary.

[ tglx: Split out from combo patch. Left [try_]misrouted_irq()
  	untouched as there is no win in the slow path ]

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Link: http://lkml.kernel.org/r/1433391238-19471-19-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/linux/irq.h

@@ -487,8 +487,7 @@ extern int irq_chip_set_vcpu_affinity_parent(struct irq_data *data,
 #endif
 
 /* Handling of unhandled and spurious interrupts: */
-extern void note_interrupt(unsigned int irq, struct irq_desc *desc,
-			   irqreturn_t action_ret);
+extern void note_interrupt(struct irq_desc *desc, irqreturn_t action_ret);
 
 
 /* Enable/disable irq debugging output: */

kernel/irq/chip.c

@@ -328,7 +328,7 @@ void handle_nested_irq(unsigned int irq)
 
 	action_ret = action->thread_fn(action->irq, action->dev_id);
 	if (!noirqdebug)
-		note_interrupt(irq, desc, action_ret);
+		note_interrupt(desc, action_ret);
 
 	raw_spin_lock_irq(&desc->lock);
 	irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);

kernel/irq/handle.c

@@ -176,7 +176,7 @@ handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action)
 	add_interrupt_randomness(irq, flags);
 
 	if (!noirqdebug)
-		note_interrupt(irq, desc, retval);
+		note_interrupt(desc, retval);
 	return retval;
 }
 

kernel/irq/spurious.c

@@ -270,9 +270,10 @@ try_misrouted_irq(unsigned int irq, struct irq_desc *desc,
 
 #define SPURIOUS_DEFERRED	0x80000000
 
-void note_interrupt(unsigned int irq, struct irq_desc *desc,
-		    irqreturn_t action_ret)
+void note_interrupt(struct irq_desc *desc, irqreturn_t action_ret)
 {
+	unsigned int irq;
+
 	if (desc->istate & IRQS_POLL_INPROGRESS ||
 	    irq_settings_is_polled(desc))
 		return;
@@ -396,6 +397,7 @@ void note_interrupt(unsigned int irq, struct irq_desc *desc,
 		desc->last_unhandled = jiffies;
 	}
 
+	irq = irq_desc_get_irq(desc);
 	if (unlikely(try_misrouted_irq(irq, desc, action_ret))) {
 		int ok = misrouted_irq(irq);
 		if (action_ret == IRQ_NONE)