1 files changed, 27 insertions, 9 deletions

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index ac07a30a7934..77d3ce05798e 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -43,13 +43,8 @@
  */
 #ifndef __real_pte
 
-#ifdef CONFIG_STRICT_MM_TYPECHECKS
 #define __real_pte(e,p)		((real_pte_t){(e)})
 #define __rpte_to_pte(r)	((r).pte)
-#else
-#define __real_pte(e,p)		(e)
-#define __rpte_to_pte(r)	(__pte(r))
-#endif
 #define __rpte_to_hidx(r,index)	(pte_val(__rpte_to_pte(r)) >>_PAGE_F_GIX_SHIFT)
 
 #define pte_iterate_hashed_subpages(rpte, psize, va, index, shift)       \
@@ -111,6 +106,26 @@ static inline void pgd_set(pgd_t *pgdp, unsigned long val)
 	*pgdp = __pgd(val);
 }
 
+static inline void pgd_clear(pgd_t *pgdp)
+{
+	*pgdp = __pgd(0);
+}
+
+#define pgd_none(pgd)		(!pgd_val(pgd))
+#define pgd_present(pgd)	(!pgd_none(pgd))
+
+static inline pte_t pgd_pte(pgd_t pgd)
+{
+	return __pte(pgd_val(pgd));
+}
+
+static inline pgd_t pte_pgd(pte_t pte)
+{
+	return __pgd(pte_val(pte));
+}
+
+extern struct page *pgd_page(pgd_t pgd);
+
 /*
  * Find an entry in a page-table-directory.  We combine the address region
  * (the high order N bits) and the pgd portion of the address.
@@ -118,9 +133,10 @@ static inline void pgd_set(pgd_t *pgdp, unsigned long val)
 
 #define pgd_offset(mm, address)	 ((mm)->pgd + pgd_index(address))
 
+#define pud_offset(pgdp, addr)	\
+	(((pud_t *) pgd_page_vaddr(*(pgdp))) + pud_index(addr))
 #define pmd_offset(pudp,addr) \
 	(((pmd_t *) pud_page_vaddr(*(pudp))) + pmd_index(addr))
-
 #define pte_offset_kernel(dir,addr) \
 	(((pte_t *) pmd_page_vaddr(*(dir))) + pte_index(addr))
 
@@ -135,6 +151,8 @@ static inline void pgd_set(pgd_t *pgdp, unsigned long val)
 	pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
 #define pmd_ERROR(e) \
 	pr_err("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
+#define pud_ERROR(e) \
+	pr_err("%s:%d: bad pud %08lx.\n", __FILE__, __LINE__, pud_val(e))
 #define pgd_ERROR(e) \
 	pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 
@@ -154,10 +172,10 @@ static inline void pgd_set(pgd_t *pgdp, unsigned long val)
 #define SWP_TYPE_BITS 5
 #define __swp_type(x)		(((x).val >> _PAGE_BIT_SWAP_TYPE) \
 				& ((1UL << SWP_TYPE_BITS) - 1))
-#define __swp_offset(x)		((x).val >> PTE_RPN_SHIFT)
+#define __swp_offset(x)		(((x).val & PTE_RPN_MASK) >> PTE_RPN_SHIFT)
 #define __swp_entry(type, offset)	((swp_entry_t) { \
-					((type) << _PAGE_BIT_SWAP_TYPE) \
-					| ((offset) << PTE_RPN_SHIFT) })
+				((type) << _PAGE_BIT_SWAP_TYPE) \
+				| (((offset) << PTE_RPN_SHIFT) & PTE_RPN_MASK)})
 /*
  * swp_entry_t must be independent of pte bits. We build a swp_entry_t from
  * swap type and offset we get from swap and convert that to pte to find a