linux-kernel - [tip:irq/core] xtensa: Use irq_set_affinity instead of homebrewn code

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Date:	Tue, 4 Mar 2014 08:43:45 -0800
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	peterz@...radead.org, chris@...kel.net, tglx@...utronix.de,
	linux-xtensa@...ux-xtensa.org
Subject: [tip:irq/core] xtensa:
  Use irq_set_affinity instead of homebrewn code

Commit-ID:  b58d971da3433654787a88c40c6fca00f5bbaa04
Gitweb:     http://git.kernel.org/tip/b58d971da3433654787a88c40c6fca00f5bbaa04
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Sun, 23 Feb 2014 21:40:10 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 4 Mar 2014 17:37:55 +0100

xtensa: Use irq_set_affinity instead of homebrewn code

There is no point in having an incomplete copy of irq_set_affinity()
for the hotplug irq migration code.

Use the core function instead and while at it switch to
for_each_active_irq()

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Chris Zankel <chris@...kel.net>
Cc: xtensa <linux-xtensa@...ux-xtensa.org>
Link: http://lkml.kernel.org/r/20140223212736.664624945@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/xtensa/kernel/irq.c | 22 +++-------------------
 1 file changed, 3 insertions(+), 19 deletions(-)

diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index 482868a..3eee94f 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -155,18 +155,6 @@ void __init init_IRQ(void)
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
-static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
-{
-	struct irq_desc *desc = irq_to_desc(irq);
-	struct irq_chip *chip = irq_data_get_irq_chip(data);
-	unsigned long flags;
-
-	raw_spin_lock_irqsave(&desc->lock, flags);
-	if (chip->irq_set_affinity)
-		chip->irq_set_affinity(data, cpumask_of(cpu), false);
-	raw_spin_unlock_irqrestore(&desc->lock, flags);
-}
-
 /*
  * The CPU has been marked offline.  Migrate IRQs off this CPU.  If
  * the affinity settings do not allow other CPUs, force them onto any
@@ -175,10 +163,9 @@ static void route_irq(struct irq_data *data, unsigned int irq, unsigned int cpu)
 void migrate_irqs(void)
 {
 	unsigned int i, cpu = smp_processor_id();
-	struct irq_desc *desc;
 
-	for_each_irq_desc(i, desc) {
-		struct irq_data *data = irq_desc_get_irq_data(desc);
+	for_each_active_irq(i) {
+		struct irq_data *data = irq_get_irq_data(i);
 		unsigned int newcpu;
 
 		if (irqd_is_per_cpu(data))
@@ -194,11 +181,8 @@ void migrate_irqs(void)
 					    i, cpu);
 
 			cpumask_setall(data->affinity);
-			newcpu = cpumask_any_and(data->affinity,
-						 cpu_online_mask);
 		}
-
-		route_irq(data, i, newcpu);
+		irq_set_affinity(i, data->affinity);
 	}
 }
 #endif /* CONFIG_HOTPLUG_CPU */
--
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