x86: unify __set_fixmap

In both cases, I went with the 32-bit behaviour.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/fixmap.h b/include/asm-x86/fixmap.h
index 01b0f98..934d6b4 100644
--- a/include/asm-x86/fixmap.h
+++ b/include/asm-x86/fixmap.h
@@ -7,6 +7,8 @@
 # include "fixmap_64.h"
 #endif
 
+extern int fixmaps_set;
+
 extern void __set_fixmap(enum fixed_addresses idx,
 			 unsigned long phys, pgprot_t flags);
 #define set_fixmap(idx, phys)				\