[PATCH] uml: use host AIO support

This patch makes UML use host AIO support when it (and
/usr/include/linux/aio_abi.h) are present.  This is only the support, with no
consumers - a consumer is coming in the next patch.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/include/irq_kern.h b/arch/um/include/irq_kern.h
index 3af52a6..c222d56 100644
--- a/arch/um/include/irq_kern.h
+++ b/arch/um/include/irq_kern.h
@@ -7,12 +7,15 @@
 #define __IRQ_KERN_H__
 
 #include "linux/interrupt.h"
+#include "asm/ptrace.h"
 
 extern int um_request_irq(unsigned int irq, int fd, int type,
 			  irqreturn_t (*handler)(int, void *,
 						 struct pt_regs *),
 			  unsigned long irqflags,  const char * devname,
 			  void *dev_id);
+extern int init_aio_irq(int irq, char *name,
+			irqreturn_t (*handler)(int, void *, struct pt_regs *));
 
 #endif