[Xen-devel] [tip:x86/irq] x86: Skip migrating IRQF_PER_CPU irqs in fixup_irqs()

["tip-bot for Tian, Kevin" <kevin.tian@xxxxxxxxx>]

Commit-ID:  b87ba87ca26e226b2277a2d5613ed596f408e96d
Gitweb:     http://git.kernel.org/tip/b87ba87ca26e226b2277a2d5613ed596f408e96d
Author:     Tian, Kevin <kevin.tian@xxxxxxxxx>
AuthorDate: Fri, 6 May 2011 14:43:36 +0800
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Thu, 19 May 2011 14:51:08 +0200

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@xxxxxxxxx>
Signed-off-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Cc: Jan Beulich <JBeulich@xxxxxxxxxx>
Cc: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Link: 
http://lkml.kernel.org/r/%3C625BA99ED14B2D499DC4E29D8138F1505C8ED7F7E2%40shsmsx502.ccr.corp.intel.com%3E
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

---
 arch/x86/kernel/irq.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 1cb0b9f..544efe2 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;

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