sections: fix section conflicts in arch/ia64

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/ia64/xen/irq_xen.h b/arch/ia64/xen/irq_xen.h
index 26110f3..1778517 100644
--- a/arch/ia64/xen/irq_xen.h
+++ b/arch/ia64/xen/irq_xen.h
@@ -27,7 +27,7 @@
 extern char xen_event_callback;
 void __init xen_init_IRQ(void);
 
-extern const struct pv_irq_ops xen_irq_ops __initdata;
+extern const struct pv_irq_ops xen_irq_ops __initconst;
 extern void xen_smp_intr_init(void);
 extern void xen_send_ipi(int cpu, int vec);