[PATCH] x86_64: CONFIG_BUG=n fixes

Fixes some !CONFIG_BUG warnings:
include/asm/mmu_context.h: I funktion `switch_mm':
include/asm/mmu_context.h:57: varning: implicit declaration of function `out_of_line_bug'

Signed-off-by: Alexander Nyberg <alexn@telia.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-x86_64/bug.h b/include/asm-x86_64/bug.h
index bdbf66e..3d2a666 100644
--- a/include/asm-x86_64/bug.h
+++ b/include/asm-x86_64/bug.h
@@ -21,6 +21,8 @@
 	asm volatile("ud2 ; .quad %c1 ; .short %c0" :: \
 		     "i"(__LINE__), "i" (__stringify(__FILE__)))
 void out_of_line_bug(void);
+#else
+static inline void out_of_line_bug(void) { }
 #endif
 
 #include <asm-generic/bug.h>