[RFC][PATCH] unify pfn_to_page [3/25] arm pfn_toPage/page_to_pfn

[RFC][PATCH] unify pfn_to_page [3/25] arm pfn_toPage/page_to_pfn

[KAMEZAWA Hiroyuki]

PFN_TO_NID()/ LOCAL_MAP_NR() is defined by each subarch.

arm can use generic funcs.

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Index: cleanup_pfn_page/include/asm-arm/memory.h
===================================================================
--- cleanup_pfn_page.orig/include/asm-arm/memory.h
+++ cleanup_pfn_page/include/asm-arm/memory.h
@@ -172,9 +172,7 @@ static inline __deprecated void *bus_to_
   *  virt_addr_valid(k)	indicates whether a virtual address is valid
   */
  #ifndef CONFIG_DISCONTIGMEM
-
-#define page_to_pfn(page)	(((page) - mem_map) + PHYS_PFN_OFFSET)
-#define pfn_to_page(pfn)	((mem_map + (pfn)) - PHYS_PFN_OFFSET)
+#define ARCH_PFN_OFFSET		(PHYS_PFN_OFFSET)
  #define pfn_valid(pfn)		((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr))

  #define virt_to_page(kaddr)	(pfn_to_page(__pa(kaddr) >> PAGE_SHIFT))
@@ -190,12 +188,8 @@ static inline __deprecated void *bus_to_
   */
  #include <linux/numa.h>

-#define page_to_pfn(page)					\
-	(( (page) - page_zone(page)->zone_mem_map)		\
-	  + page_zone(page)->zone_start_pfn)
-
-#define pfn_to_page(pfn)					\
-	(PFN_TO_MAPBASE(pfn) + LOCAL_MAP_NR((pfn) << PAGE_SHIFT))
+#define arch_pfn_to_nid(pfn) 		(PFN_TO_NID(pfn))
+#define arch_local_map_nr(pfn, nid)	(LOCAL_MAP_NR((pfn) << PAGE_SHIFT))

  #define pfn_valid(pfn)						\
  	({							\