[PATCH 08 of 10] x86: unify zero_page definition

[Jeremy Fitzhardinge <jeremy@goop.org>]

Move ZERO_PAGE/empty_zero_page to common place.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>

---
 include/asm-x86/pgtable.h    |    8 ++++++++
 include/asm-x86/pgtable_32.h |    6 ------
 include/asm-x86/pgtable_64.h |    7 -------
 3 files changed, 8 insertions(+), 13 deletions(-)

diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -110,6 +110,14 @@ extern unsigned long long __PAGE_KERNEL,
 #define __S111	PAGE_SHARED_EXEC
 
 #ifndef __ASSEMBLER__
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
+#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
+
 
 /*
  * The following only work if pte_present() is true.
diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -25,12 +25,6 @@ struct mm_struct;
 struct mm_struct;
 struct vm_area_struct;
 
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
-extern unsigned long empty_zero_page[1024];
 extern pgd_t swapper_pg_dir[1024];
 extern struct kmem_cache *pmd_cache;
 extern spinlock_t pgd_lock;
diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h
--- a/include/asm-x86/pgtable_64.h
+++ b/include/asm-x86/pgtable_64.h
@@ -22,13 +22,6 @@ extern pgd_t init_level4_pgt[];
 
 extern void paging_init(void);
 extern void clear_kernel_mapping(unsigned long addr, unsigned long size);
-
-/*
- * ZERO_PAGE is a global shared page that is always zero: used
- * for zero-mapped memory areas etc..
- */
-extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
-#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
 
 #endif /* !__ASSEMBLY__ */