[PATCH] uml: fix compilation for __CHOOSE_MODE addition

I had added the __CHOOSE_MODE syntax to fix some warnings with newer GCC's
in the uml-fix-cond-expr-as-lvalues-warning patch.

Here is the update from the version I sent to make it work also when only
one mode (TT or SKAS) is enabled.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/um/include/choose-mode.h

@@ -11,6 +11,13 @@
 #if defined(UML_CONFIG_MODE_TT) && defined(UML_CONFIG_MODE_SKAS)
 #define CHOOSE_MODE(tt, skas) (mode_tt ? (tt) : (skas))
 
+extern int mode_tt;
+static inline void *__choose_mode(void *tt, void *skas) {
+	return mode_tt ? tt : skas;
+}
+
+#define __CHOOSE_MODE(tt, skas) (*( (typeof(tt) *) __choose_mode(&(tt), &(skas))))
+
 #elif defined(UML_CONFIG_MODE_SKAS)
 #define CHOOSE_MODE(tt, skas) (skas)
 
@@ -21,22 +28,8 @@
 #define CHOOSE_MODE_PROC(tt, skas, args...) \
 	CHOOSE_MODE(tt(args), skas(args))
 
-extern int mode_tt;
-static inline void *__choose_mode(void *tt, void *skas) {
-	return mode_tt ? tt : skas;
-}
-
-#define __CHOOSE_MODE(tt, skas) (*( (typeof(tt) *) __choose_mode(&(tt), &(skas))))
-
+#ifndef __CHOOSE_MODE
+#define __CHOOSE_MODE(tt, skas) CHOOSE_MODE(tt, skas)
 #endif
 
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */
+#endif