From: Jeff Dike <jdike@addtoit.com>

UML now needs required-features.h to build - an empty one suffices.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/asm-um/required-features.h |    9 +++++++++
 1 files changed, 9 insertions(+)

diff -puN /dev/null include/asm-um/required-features.h
--- /dev/null
+++ a/include/asm-um/required-features.h
@@ -0,0 +1,9 @@
+#ifndef __UM_REQUIRED_FEATURES_H
+#define __UM_REQUIRED_FEATURES_H
+
+/*
+ * Nothing to see, just need something for the i386 and x86_64 asm
+ * headers to include.
+ */
+
+#endif
_