===== hardirq.h 1.13 vs edited =====
--- 1.13/include/asm-ia64/hardirq.h	Thu Jun 12 12:53:38 2003
+++ edited/hardirq.h	Fri Aug  8 13:00:23 2003
@@ -89,6 +89,7 @@
 #define irq_enter()		(preempt_count() += HARDIRQ_OFFSET)
 
 #ifdef CONFIG_PREEMPT
+# include <linux/smp_lock.h>
 # define in_atomic()		((preempt_count() & ~PREEMPT_ACTIVE) != kernel_locked())
 # define IRQ_EXIT_OFFSET (HARDIRQ_OFFSET-1)
 #else