1 files changed, 2 insertions, 1 deletions

diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 3e0d89dcdba2..0afd21f9a222 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -566,9 +566,10 @@ static void __init mpic_scan_ht_pics(struct mpic *mpic)
 #ifdef CONFIG_SMP
 static int irq_choose_cpu(unsigned int virt_irq)
 {
-        cpumask_t mask = irq_desc[virt_irq].affinity;
+        cpumask_t mask;
         int cpuid;
 
+        cpumask_copy(&mask, irq_desc[virt_irq].affinity);
         if (cpus_equal(mask, CPU_MASK_ALL)) {
                 static int irq_rover;
                 static DEFINE_SPINLOCK(irq_rover_lock);