[PATCH] um: irq changes break build

Fixup broken UML build due to 7d12e780e0
"IRQ: Maintain regs pointer globally rather than passing to IRQ handlers".

Cc: David Howells <dhowells@redhat.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Paolo "Blaisorblade" Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/kernel/irq.c

@@ -356,7 +356,7 @@ void forward_interrupts(int pid)
 unsigned int do_IRQ(int irq, union uml_pt_regs *regs)
 {
        irq_enter();
-       __do_IRQ(irq, (struct pt_regs *)regs);
+       __do_IRQ(irq);
        irq_exit();
        return 1;
 }

include/asm-um/irq_regs.h

@@ -0,0 +1 @@
+#include <asm-generic/irq_regs.h>