x86: move page_is_ram() function

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index e2c79d8..c8b30ef 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -47,6 +47,9 @@
 
 
 #ifndef __ASSEMBLY__
+
+extern int page_is_ram(unsigned long pagenr);
+
 struct page;
 
 static void inline clear_user_page(void *page, unsigned long vaddr,