Merge branch 'linux-2.6'

1 files changed, 37 insertions, 51 deletions

diff --git a/include/asm-x86/pgtable-3level.h b/include/asm-x86/pgtable-3level.h
index 948a33414118..a195c3e757b9 100644
--- a/include/asm-x86/pgtable-3level.h
+++ b/include/asm-x86/pgtable-3level.h
@@ -15,16 +15,18 @@
 #define pgd_ERROR(e) \
 	printk("%s:%d: bad pgd %p(%016Lx).\n", __FILE__, __LINE__, &(e), pgd_val(e))
 
-#define pud_none(pud)				0
-#define pud_bad(pud)				0
-#define pud_present(pud)			1
 
-/*
- * All present pages with !NX bit are kernel-executable:
- */
-static inline int pte_exec_kernel(pte_t pte)
+static inline int pud_none(pud_t pud)
+{
+	return pud_val(pud) == 0;
+}
+static inline int pud_bad(pud_t pud)
+{
+	return (pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER)) != 0;
+}
+static inline int pud_present(pud_t pud)
 {
-	return !(pte_val(pte) & _PAGE_NX);
+	return pud_val(pud) & _PAGE_PRESENT;
 }
 
 /* Rules for using set_pte: the pte being assigned *must* be
@@ -39,11 +41,6 @@ static inline void native_set_pte(pte_t *ptep, pte_t pte)
 	smp_wmb();
 	ptep->pte_low = pte.pte_low;
 }
-static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr,
-				     pte_t *ptep , pte_t pte)
-{
-	native_set_pte(ptep, pte);
-}
 
 /*
  * Since this is only called on user PTEs, and the page fault handler
@@ -71,7 +68,7 @@ static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
 }
 static inline void native_set_pud(pud_t *pudp, pud_t pud)
 {
-	*pudp = pud;
+	set_64bit((unsigned long long *)(pudp),native_pud_val(pud));
 }
 
 /*
@@ -94,24 +91,29 @@ static inline void native_pmd_clear(pmd_t *pmd)
 	*(tmp + 1) = 0;
 }
 
-#ifndef CONFIG_PARAVIRT
-#define set_pte(ptep, pte)			native_set_pte(ptep, pte)
-#define set_pte_at(mm, addr, ptep, pte)		native_set_pte_at(mm, addr, ptep, pte)
-#define set_pte_present(mm, addr, ptep, pte)	native_set_pte_present(mm, addr, ptep, pte)
-#define set_pte_atomic(ptep, pte)		native_set_pte_atomic(ptep, pte)
-#define set_pmd(pmdp, pmd)			native_set_pmd(pmdp, pmd)
-#define set_pud(pudp, pud)			native_set_pud(pudp, pud)
-#define pte_clear(mm, addr, ptep)		native_pte_clear(mm, addr, ptep)
-#define pmd_clear(pmd)				native_pmd_clear(pmd)
-#endif
-
-/*
- * Pentium-II erratum A13: in PAE mode we explicitly have to flush
- * the TLB via cr3 if the top-level pgd is changed...
- * We do not let the generic code free and clear pgd entries due to
- * this erratum.
- */
-static inline void pud_clear (pud_t * pud) { }
+static inline void pud_clear(pud_t *pudp)
+{
+	set_pud(pudp, __pud(0));
+
+	/*
+	 * In principle we need to do a cr3 reload here to make sure
+	 * the processor recognizes the changed pgd.  In practice, all
+	 * the places where pud_clear() gets called are followed by
+	 * full tlb flushes anyway, so we can defer the cost here.
+	 *
+	 * Specifically:
+	 *
+	 * mm/memory.c:free_pmd_range() - immediately after the
+	 * pud_clear() it does a pmd_free_tlb().  We change the
+	 * mmu_gather structure to do a full tlb flush (which has the
+	 * effect of reloading cr3) when the pagetable free is
+	 * complete.
+	 *
+	 * arch/x86/mm/hugetlbpage.c:huge_pmd_unshare() - the call to
+	 * this is followed by a flush_tlb_range, which on x86 does a
+	 * full tlb flush.
+	 */
+}
 
 #define pud_page(pud) \
 ((struct page *) __va(pud_val(pud) & PAGE_MASK))
@@ -155,21 +157,7 @@ static inline int pte_none(pte_t pte)
 
 static inline unsigned long pte_pfn(pte_t pte)
 {
-	return pte_val(pte) >> PAGE_SHIFT;
-}
-
-extern unsigned long long __supported_pte_mask;
-
-static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
-{
-	return __pte((((unsigned long long)page_nr << PAGE_SHIFT) |
-		      pgprot_val(pgprot)) & __supported_pte_mask);
-}
-
-static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
-{
-	return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) |
-		      pgprot_val(pgprot)) & __supported_pte_mask);
+	return (pte_val(pte) & ~_PAGE_NX) >> PAGE_SHIFT;
 }
 
 /*
@@ -177,7 +165,7 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
  * put the 32 bits of offset into the high part.
  */
 #define pte_to_pgoff(pte) ((pte).pte_high)
-#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
+#define pgoff_to_pte(off) ((pte_t) { { .pte_low = _PAGE_FILE, .pte_high = (off) } })
 #define PTE_FILE_MAX_BITS       32
 
 /* Encode and de-code a swap entry */
@@ -185,8 +173,6 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
 #define __swp_offset(x)			((x).val >> 5)
 #define __swp_entry(type, offset)	((swp_entry_t){(type) | (offset) << 5})
 #define __pte_to_swp_entry(pte)		((swp_entry_t){ (pte).pte_high })
-#define __swp_entry_to_pte(x)		((pte_t){ 0, (x).val })
-
-#define __pmd_free_tlb(tlb, x)		do { } while (0)
+#define __swp_entry_to_pte(x)		((pte_t){ { .pte_high = (x).val } })
 
 #endif /* _I386_PGTABLE_3LEVEL_H */