Merge master.kernel.org:/home/rmk/linux-2.6-i2c manually

[sfrench/cifs-2.6.git] / arch / i386 / mm / hugetlbpage.c

diff --git a/arch/i386/mm/hugetlbpage.c b/arch/i386/mm/hugetlbpage.c
index 3b099f32b9487a054db420509ad25591ea0d06eb..d524127c9afc3b2f92b3e5ad6b3dbce20bec42f7 100644 (file)
--- a/arch/i386/mm/hugetlbpage.c
+++ b/arch/i386/mm/hugetlbpage.c
@@ -22,12 +22,15 @@ pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr)
 {
        pgd_t *pgd;
        pud_t *pud;
-       pmd_t *pmd = NULL;
+       pte_t *pte = NULL;
 
        pgd = pgd_offset(mm, addr);
        pud = pud_alloc(mm, pgd, addr);
-       pmd = pmd_alloc(mm, pud, addr);
-       return (pte_t *) pmd;
+       if (pud)
+               pte = (pte_t *) pmd_alloc(mm, pud, addr);
+       BUG_ON(pte && !pte_none(*pte) && !pte_huge(*pte));
+
+       return pte;
 }
 
 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
@@ -37,8 +40,11 @@ pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
        pmd_t *pmd = NULL;
 
        pgd = pgd_offset(mm, addr);
-       pud = pud_offset(pgd, addr);
-       pmd = pmd_offset(pud, addr);
+       if (pgd_present(*pgd)) {
+               pud = pud_offset(pgd, addr);
+               if (pud_present(*pud))
+                       pmd = pmd_offset(pud, addr);
+       }
        return (pte_t *) pmd;
 }
 
@@ -118,17 +124,6 @@ follow_huge_pmd(struct mm_struct *mm, unsigned long address,
 }
 #endif
 
-void hugetlb_clean_stale_pgtable(pte_t *pte)
-{
-       pmd_t *pmd = (pmd_t *) pte;
-       struct page *page;
-
-       page = pmd_page(*pmd);
-       pmd_clear(pmd);
-       dec_page_state(nr_page_table_pages);
-       page_cache_release(page);
-}
-
 /* x86_64 also uses this file */
 
 #ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA