[PATCH] uml: define __HAVE_ARCH_CMPXCHG on x86

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-um/system-i386.h

@@ -3,4 +3,6 @@
 
 #include "asm/system-generic.h"
     
+#define __HAVE_ARCH_CMPXCHG 1
+
 #endif