[PATCH] x86-64: Remove redundant max_mapnr and replace with end_pfn

The FLATMEM people added it, but there doesn't seem a good reason
because end_pfn is identical.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 5659d97..b6a826d 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -411,11 +411,6 @@
 #ifdef CONFIG_NUMA
 	totalram_pages = numa_free_all_bootmem();
 #else
-
-#ifdef CONFIG_FLATMEM
-	max_mapnr = end_pfn;
-	if (!mem_map) BUG();
-#endif
 	totalram_pages = free_all_bootmem();
 #endif
 	reservedpages = end_pfn - totalram_pages - e820_hole_size(0, end_pfn);
diff --git a/include/asm-x86_64/page.h b/include/asm-x86_64/page.h
index 135ffaa..e5ab4d2 100644
--- a/include/asm-x86_64/page.h
+++ b/include/asm-x86_64/page.h
@@ -32,6 +32,8 @@
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
 
+extern unsigned long end_pfn;
+
 void clear_page(void *);
 void copy_page(void *, void *);
 
@@ -111,7 +113,7 @@
 #ifdef CONFIG_FLATMEM
 #define pfn_to_page(pfn)	(mem_map + (pfn))
 #define page_to_pfn(page)	((unsigned long)((page) - mem_map))
-#define pfn_valid(pfn)		((pfn) < max_mapnr)
+#define pfn_valid(pfn)		((pfn) < end_pfn)
 #endif
 
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
diff --git a/include/asm-x86_64/proto.h b/include/asm-x86_64/proto.h
index f757419..764b5f8 100644
--- a/include/asm-x86_64/proto.h
+++ b/include/asm-x86_64/proto.h
@@ -93,8 +93,6 @@
 extern void select_idle_routine(const struct cpuinfo_x86 *c);
 extern void swiotlb_init(void);
 
-extern unsigned long max_mapnr;
-extern unsigned long end_pfn; 
 extern unsigned long table_start, table_end;
 
 extern int exception_trace;