i386: Remove extern declaration from  mm/discontig.c, put in header.

From: Rusty Russell <rusty@rustcorp.com.au>
Extern declarations belong in headers.  Times, they are a'changin.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>

===================================================================
---
 arch/i386/mm/discontig.c |    1 -
 include/asm-i386/setup.h |    2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)

Index: linux/arch/i386/mm/discontig.c
===================================================================
--- linux.orig/arch/i386/mm/discontig.c
+++ linux/arch/i386/mm/discontig.c
@@ -101,7 +101,6 @@ extern void find_max_pfn(void);
 extern void add_one_highpage_init(struct page *, int, int);
 
 extern struct e820map e820;
-extern unsigned long init_pg_tables_end;
 extern unsigned long highend_pfn, highstart_pfn;
 extern unsigned long max_low_pfn;
 extern unsigned long totalram_pages;
Index: linux/include/asm-i386/setup.h
===================================================================
--- linux.orig/include/asm-i386/setup.h
+++ linux/include/asm-i386/setup.h
@@ -77,6 +77,8 @@ int __init sanitize_e820_map(struct e820
 void __init add_memory_region(unsigned long long start,
 			      unsigned long long size, int type);
 
+extern unsigned long init_pg_tables_end;
+
 #endif /* __ASSEMBLY__ */
 
 #endif  /*  __KERNEL__  */