diff --git a/arch/x86/xen/spinlock.c b/arch/x86/xen/spinlock.c
index 3002ec1bb71a27d193ce4b1e041f8b3a3c5b49fa..a40f8508e760d0259e6016903be5fdb1e5d69aa9 100644
--- a/arch/x86/xen/spinlock.c
+++ b/arch/x86/xen/spinlock.c
@@ -7,6 +7,7 @@
 #include <linux/debugfs.h>
 #include <linux/log2.h>
 #include <linux/gfp.h>
+#include <linux/slab.h>
 
 #include <asm/paravirt.h>
 
@@ -165,6 +166,7 @@ static int xen_spin_trylock(struct arch_spinlock *lock)
 	return old == 0;
 }
 
+static DEFINE_PER_CPU(char *, irq_name);
 static DEFINE_PER_CPU(int, lock_kicker_irq) = -1;
 static DEFINE_PER_CPU(struct xen_spinlock *, lock_spinners);
 
@@ -362,7 +364,7 @@ static irqreturn_t dummy_handler(int irq, void *dev_id)
 void __cpuinit xen_init_lock_cpu(int cpu)
 {
 	int irq;
-	const char *name;
+	char *name;
 
 	WARN(per_cpu(lock_kicker_irq, cpu) >= 0, "spinlock on CPU%d exists on IRQ%d!\n",
 	     cpu, per_cpu(lock_kicker_irq, cpu));
@@ -385,6 +387,7 @@ void __cpuinit xen_init_lock_cpu(int cpu)
 	if (irq >= 0) {
 		disable_irq(irq); /* make sure it's never delivered */
 		per_cpu(lock_kicker_irq, cpu) = irq;
+		per_cpu(irq_name, cpu) = name;
 	}
 
 	printk("cpu %d spinlock event irq %d\n", cpu, irq);
@@ -401,6 +404,8 @@ void xen_uninit_lock_cpu(int cpu)
 
 	unbind_from_irqhandler(per_cpu(lock_kicker_irq, cpu), NULL);
 	per_cpu(lock_kicker_irq, cpu) = -1;
+	kfree(per_cpu(irq_name, cpu));
+	per_cpu(irq_name, cpu) = NULL;
 }
 
 void __init xen_init_spinlocks(void)