interrupt.h needs <asm/system.h>

<asm/system.h> is needed for smp_mb(). Apparently this definition is pulled in some other way on ia32.

include/linux/interrupt.h +1 -0

@@ -8,6 +8,7 @@
 #include <asm/hardirq.h>
 #include <asm/ptrace.h>
 #include <asm/softirq.h>
+#include <asm/system.h>
 
 struct irqaction {
 	void (*handler)(int, void *, struct pt_regs *);