[PATCH] unify pfn_to_page: h8300 pfn_to_page

H8300 can use generic funcs.
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

include/asm-h8300/page.h

@@ -71,8 +71,7 @@ extern unsigned long memory_end;
 #define page_to_virt(page)	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
 #define pfn_valid(page)	        (page < max_mapnr)
 
-#define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
-#define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
+#define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
 
 #define	virt_addr_valid(kaddr)	(((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
 				((void *)(kaddr) < (void *)memory_end))
@@ -81,6 +80,7 @@ extern unsigned long memory_end;
 
 #endif /* __KERNEL__ */
 
+#include <asm-generic/memory_model.h>
 #include <asm-generic/page.h>
 
 #endif /* _H8300_PAGE_H */