[PATCH] x86_64 pte warning fix

include/asm/pgtable.h:267: warning: `struct vm_area_struct' declared inside parameter list
include/asm/pgtable.h:267: warning: its scope is only this definition or declaration, which is probably not what you want

Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

include/asm-x86_64/pgtable.h

@@ -264,6 +264,8 @@ extern inline pte_t pte_mkdirty(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) |
 extern inline pte_t pte_mkyoung(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; }
 extern inline pte_t pte_mkwrite(pte_t pte)	{ set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; }
 
+struct vm_area_struct;
+
 static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
 {
 	if (!pte_dirty(*ptep))