x86: move to .rodata/.init.data

The array is never written, and on 64-bits it's not even being used
past initial boot.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/hw_irq_32.h b/include/asm-x86/hw_irq_32.h
index b93e35a7..6d65fbb 100644
--- a/include/asm-x86/hw_irq_32.h
+++ b/include/asm-x86/hw_irq_32.h
@@ -26,7 +26,7 @@
  * Interrupt entry/exit code at both C and assembly level
  */
 
-extern void (*interrupt[NR_IRQS])(void);
+extern void (*const interrupt[NR_IRQS])(void);
 
 #ifdef CONFIG_SMP
 void reschedule_interrupt(void);