[SPARC64]: dr-cpu unconfigure support.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 20 insertions, 0 deletions

diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index a1c916f35baa..8cb3358674f5 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -803,6 +803,26 @@ void handler_irq(int irq, struct pt_regs *regs)
         set_irq_regs(old_regs);
 }
 
+#ifdef CONFIG_HOTPLUG_CPU
+void fixup_irqs(void)
+{
+        unsigned int irq;
+
+        for (irq = 0; irq < NR_IRQS; irq++) {
+                unsigned long flags;
+
+                spin_lock_irqsave(&irq_desc[irq].lock, flags);
+                if (irq_desc[irq].action &&
+                    !(irq_desc[irq].status & IRQ_PER_CPU)) {
+                        if (irq_desc[irq].chip->set_affinity)
+                                irq_desc[irq].chip->set_affinity(irq,
+                                        irq_desc[irq].affinity);
+                }
+                spin_unlock_irqrestore(&irq_desc[irq].lock, flags);
+        }
+}
+#endif
+
 struct sun5_timer {
         u64     count0;
         u64     limit0;