[RFC][PATCH] unify pfn_to_page [24/25] xtensa pfn_to_page/page_to_pfn

[KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>]

sparc can use generic ones by defining ARCH_PFN_OFFSET as pfn_base

Signed-Off-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

Index: cleanup_pfn_page/include/asm-sparc/page.h
===================================================================
--- cleanup_pfn_page.orig/include/asm-sparc/page.h
+++ cleanup_pfn_page/include/asm-sparc/page.h
@@ -152,8 +152,7 @@ extern unsigned long pfn_base;
 #define virt_to_phys		__pa
 #define phys_to_virt		__va

-#define pfn_to_page(pfn)	(mem_map + ((pfn)-(pfn_base)))
-#define page_to_pfn(page)	((unsigned long)(((page) - mem_map) + pfn_base))
+#define ARCH_PFN_OFFSET		(pfn_base)
 #define virt_to_page(kaddr)	(mem_map + ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT)))

 #define pfn_valid(pfn)		(((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr))

-
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