[tip:x86/apic] genirq: Provide irq_desc_has_action

[tip-bot for Thomas Gleixner <tipbot@zytor.com>]

Commit-ID:  f61ae4fb66a4f7ae49e3456003fc4328d6db09c9
Gitweb:     http://git.kernel.org/tip/f61ae4fb66a4f7ae49e3456003fc4328d6db09c9
Author:     Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Sun, 2 Aug 2015 20:38:26 +0000
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Thu, 6 Aug 2015 00:14:59 +0200

genirq: Provide irq_desc_has_action

If we have a reference to irq_desc already, there is no point to do
another lookup.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Link: http://lkml.kernel.org/r/20150802203609.638130301@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/irqdesc.h | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index fcea4e4..5acfa26 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -166,12 +166,16 @@ static inline int handle_domain_irq(struct irq_domain *domain,
 #endif
 
 /* Test to see if a driver has successfully requested an irq */
-static inline int irq_has_action(unsigned int irq)
+static inline int irq_desc_has_action(struct irq_desc *desc)
 {
-	struct irq_desc *desc = irq_to_desc(irq);
 	return desc->action != NULL;
 }
 
+static inline int irq_has_action(unsigned int irq)
+{
+	return irq_desc_has_action(irq_to_desc(irq));
+}
+
 /* caller has locked the irq_desc and both params are valid */
 static inline void __irq_set_handler_locked(unsigned int irq,
 					    irq_flow_handler_t handler)