From: Tian, Kevin <kevin.tian@intel.com>
Date: Fri, 6 May 2011 06:43:36 +0000 (+0800)
Subject: x86: Skip migrating IRQF_PER_CPU irqs in fixup_irqs()
X-Git-Tag: v3.0-rc1~397^4~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=b87ba87ca26e226b2277a2d5613ed596f408e96d;p=linux.git

x86: Skip migrating IRQF_PER_CPU irqs in fixup_irqs()

IRQF_PER_CPU means that the irq cannot be moved away from a given
cpu. So it must not be migrated when the cpu goes offline.

[ tglx: massaged changelog ]

Signed-off-by: Fengzhe Zhang <fengzhe.zhang@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Cc: Jan Beulich <JBeulich@novell.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Link: http://lkml.kernel.org/r/%3C625BA99ED14B2D499DC4E29D8138F1505C8ED7F7E2%40shsmsx502.ccr.corp.intel.com%3E
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 1cb0b9fc78dc..544efe2741be 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -249,7 +249,7 @@ void fixup_irqs(void)
 
 		data = irq_desc_get_irq_data(desc);
 		affinity = data->affinity;
-		if (!irq_has_action(irq) ||
+		if (!irq_has_action(irq) || irqd_is_per_cpu(data) ||
 		    cpumask_subset(affinity, cpu_online_mask)) {
 			raw_spin_unlock(&desc->lock);
 			continue;